CN101804564A - High-efficiency short-flow production line of composite material of high-alloy steel and high-alloy steel - Google Patents
High-efficiency short-flow production line of composite material of high-alloy steel and high-alloy steel Download PDFInfo
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Abstract
The invention relates to a hgh-efficiency short-flow production line of a composite material of high-alloy steel and high-alloy steel, wherein the high-alloy steel comprises materials of nickel base high-temperature alloy, and the like. The production line aims at processing high-alloy steel types which cannot be continuously casted and continuously rolled or have no guaranteed continuous casting quality or have greatly polished continuous casting billets. The invention specifically relates to three production lines, i.e. high-efficiency short-flow production lines of metal composite plates, metal composite pipes and metal composite bars, which are made of high-alloy steel and use metal composite plates as coatings. The invention is characterized in that different smelting devices of a smelting workshop flexibly cope with different steel types, and all billet casting devices are liquid metal electroslag smelting casting devices; the devices can flexibly produce high-quality plate billets, composite plate billets, hollow pipe billets, composite pipe billets, round billets and composite round billets; and the plate billets can be combined with reversible rough rolling and finish rolling by being supported by on-line heating before rolling, an insulating roller way, and the like to flexibly produce high-alloy plates. The production line is combined with an extruder to flexibly produce pipes and combined with a Y-shaped three-roller continuous rolling to flexibly produce wire bars.
Description
Technical field
The present invention relates to the production method of high-alloy steel (comprising alloy) and composite wood thereof, relating to can not continuous casting or the serious and production of high-alloy steel that must die casting (comprising traditional electroslag remelting) of continuous casting billet quality problem, the present invention relates to high-alloy steel and be the high efficiency shortened process production line of the composite material of coating with the high-alloy steel, relating to high-alloy steel and high-alloy steel is the composition metal plate high efficiency shortened process production line of coating, relating to high-alloy steel and high-alloy steel is the composition metal tubing high efficiency shortened process production line of coating, and relating to high-alloy steel and high-alloy steel is the composition metal rod wire rod high efficiency shortened process production line of coating.
Background technology
High-alloy steel such as high-speed tool steel, alloy tool steel, high alloy tool steel, internal combustion engine valve steel, various stainless steel, heat-resistant high alloy steel, Precise Alloy, high temperature alloy, electric resistance alloy etc. all are the strategic metal materials of various countries' band, being the high-end product of the high technology content high added value in the special steel industry, also is the important indicator of weighing a national iron and steel aggregate level.As coming comparison with ton steel profit, the profit of producing 10,000,000 tons of high alloy steel mills is equivalent to the profit of 100,000,000 tons of general steel mills.The main alloy element of high-alloy steel and alloy is chromium, nickel, tungsten, molybdenum and vanadium etc., and exactly they are strategic resources.This resource is very limited in epigeosphere, and it is again extremely uneven that all parts of the world distributes, if country's these resources of long-term dependence on import are produced high-alloy steel, seeing from sustainable development for a country is danger close.In a word, production of high-alloy steel and products thereof has important strategic position in national economy as can be seen from the above description.
In countries in the world, high-alloy steel and alloy production are the very big industries of difficulty, are characterized in:
(1) by national standard, high-alloy steel and alloy designations have more than 400, and therefore specifications and models claim that high-alloy steel is a multi-assortment production more than 4000.From the size of order of each each kind tens kilograms, hundreds of kilogram, several tons, tens tons are arranged, the hundreds of tons do not wait at most, are again the products of the small lot batch manufacture and the supply of material therefore, and it is difficulty extremely that factory's tissue is produced.
The high-alloy steel of (2) 400 many trades mark and alloy property difference are very big, from smelting to pressure processing process difference is very big, back step heat treatment method difference is huge, as can in electric arc furnaces+external refining stove, producing that smelting process has, what have must produce in vaccum sensitive stove, and what have wants vacuum casting, the necessary electroslag remelting that has, major part can not continuous billet casting, can only die casting.The high low temperature of pressure processing temperature range differs the less than that has 100 degree, and what have reaches 400 degree.Differ 3 times of up during pressure processing between each steel alloy of resistance of deformation, spread between steel alloy during two rolling systems to differ and be up to two times or the like, illustrate that it is extremely complicated that factory's tissue is produced.
(3) high-alloy steel and alloy product have sheet material, band, strip, foil as thin as a wafer, and bar, wire rod, silk material, extra fine filament material are arranged, and also have tubing, comprise large pipe, middle-size and small-size tubing, little of superfine tubing such as needle tubings.Therefore being the material of deep processing, is long product of production cycle.
(4) high-alloy steel and alloy product are that outward appearance fineness, dimensional accuracy, the strict degree of the every performance requirement of each trade mark all are very high, are the most complicated kinds of factory's quality control system.
(5) high-alloy steel composite, it promptly is coating with the high-alloy steel, the center is composite quality carbon steel or low-alloy steel, it is top layer or for high abrasion or for highly corrosion resistant or be the high temperature resistant contour alloy steel material internal layer composite that is high-intensity high-tenacity, also being the staple product during high-alloy steel is produced, also is the extremely long product of current production procedure.Developing the high-alloy steel composite in the long term, is the effective way that reduces the noble metal resource consumption under the high-alloy steel material property prerequisite significantly improving.
Current home and abroad is that very backward, total problem is as follows producing technological process aspect the above-mentioned various trades mark, steel alloy with a high standard and the alloy:
(1) ingot casting is long to the thermal pressure processing process flow of becoming a useful person, and many fire heat in the middle of repeatedly, cause total lumber recovery low, energy consumption per ton steel height, cost height.
(2) except some trades mark of stainless steel, under the prerequisite of a large amount of reconditioning continuous casting billets surface, carry out continuous casting and rolling, most high-alloy steel trades mark can not be carried out continuous casting and rolling production.
(3) high-alloy steel of all existing home and abroads can not the production of scale ground be the composite material of coating with the high-alloy steel all from smelting the technical process of becoming a useful person to pressure processing.
Below, describe with regard to the existing typical high alloy steel plate in home and abroad, pipe, line rod production process flow process respectively with reference to Fig. 1-Fig. 4, wherein:
Fig. 1 is traditional high-alloy steel plank stuff production technology flow process;
Fig. 2 is traditional high-alloy steel tubing technological process of production;
Fig. 3 is external high-alloy steel wire and rod material production technology flow;
Fig. 4 thinks than the advanced high-alloy steel technological process of production for China is current.
From Fig. 1 tradition high-alloy steel plank stuff production technology flow process see go wrong as follows:
(1) its surface of steel ingot of alloy steel dies ingot casting and internal soundness problem are many, scab as spindle surface pipe, and inside is loosened, is mingled with, and composition segregation etc. also will be excised the cap mouth in the production, and recovery rate of iron is low.
(2) long flow path, three fire even many pyrogenes materials, the each cooling of many high-alloy steel to the crackle sensitivity will be adopted slow cooling, has prolonged and has treated the product time, has caused the same slab production time to draw very longly.As take the hot-trimming surface, and work under bad environment, operator's working condition is abominable.
(3) board quality is not high, and total recovery rate is low, the energy consumption per ton steel height.
(4) production efficiency is low.
(5) can not produce with the high-alloy steel is the metallic composite panel of coating.
From Fig. 2 tradition high-alloy steel tubing technological process of production see go wrong as follows:
(1) long flow path, middle heating is five times from the ingot to tubing, the energy consumption height.
(2) operation is many, and processing charges is big, and recovery rate of iron is low.
(3) pipe workpiece quality is not high.
(4) can not produce with the high-alloy steel is the metal composite pipe of coating.
As follows from traditional high-alloy steel wire and rod material production technology flow existing problems shown in Figure 3:
(a) less-deformable steel in fair average quality in the special steel and the special steel is blended in the production line produces, this technology must cause the great steel grade of performance difference at a production line that latter's lumber recovery is low, waste product is many.
(b) high-speed tool steel, air valve steel, large steel ingot are just produced excellent wire rod through five heating, cause high specific energy consumption, and iron loss is big, and production process is discontinuous, belongs to long flow process route.
(c) heating for multiple times, repeatedly slow cooling, repeatedly reconditioning has further increased waste product.
(d) precise forging machine forging and pressing areal deformation, the inner crystal grain of the steel of processing is big, and the carbide network degree of crushing is low.
(e) steel grades such as two rolling system high-speed tool steels, 21-4N are middle useless many.
(f) two rolling systems, the steel heart portion of high-speed tool steel and 21-4N valve steel is of poor quality, and heart portion crystal grain is thick, high-speed tool steel core portion grade of inhomogeneity of carbide height.
(g) two roller roll lines rods dimensional tolerance is big, above-mentioned steel grade roundwood ovality ± 0.3～0.4mm, grinding difficulty (wearing into triangle) and increased stock removal when having increased the production bright bar.
(h) two roller roll line bars cause the cold-drawn lumber recovery low.
(i) all patterns all can not be produced the metal composite wire bar that the uniform high-alloy steel of the coating thickness that conforms with quality requirement is a coating, for example the rolling coating thickness of duo mill is that the compound round base of Φ 350mm stainless steel of 35mm is when rolling Φ 16mm bar, coating thickness is the thinnest on same cross section to be 0.16mm, the thickest is 2.4mm, and ratio between two reaches 15.
Fig. 4 pattern advantage is specialized production, and the electroslag quality is higher than conventional ingot casting, but following problem is still arranged:
(1) five operations are experienced in steel-making → ingot casting → annealing → remelting → annealing, four heating, and production process is discontinuous, the energy consumption height.
(2) resmelting ingot is through twice heating, and twice finish forge produced little parison (Φ 40～Φ 50), shuts out Φ 9 dish circles by Φ 40 circles on duo mill again, no matter is that bar or wire rod substance are little.
(3) precise forging machine areal deformation, the inner processing of steel is not saturating, causes steel (high-speed tool steel) heart portion carbide rank height, and full section crystal grain is seriously inhomogeneous, and heart portion crystal grain is thick.
(4) precise forging machine heel duo mill distortion has worsened the high-speed tool steel internal soundness.
(5) line bar ovality is big, stock removal when having increased the production bohler.
(6) two rollings heat that to roll lumber recovery low.
(7) two roller roll line bar ovalitys are big, and lumber recovery is low during cold-drawn.
(8) workpiece deformation easily causes the composite bed layering in the precise forging machine pressure processing, and whole production line can not be produced the uniform high-alloy steel of coating thickness+straight carbon steel recombination line bar.
Adopt produced in conventional processes high-alloy steel composite board, tubing, line bar, as Fig. 5, Fig. 6, shown in Figure 7.It is 37 that the production procedure of wherein traditional high-alloy steel composite board relates to total process number, it is 60 that the production procedure of tradition high-alloy steel composite pipe relates to total process number, it is 47 that tradition high-alloy steel recombination line bar production flow process relates to total process number, and these production procedure production method existing problems are as follows:
(1) all high-alloy steel composite woods are not metallurgical compound, thereby linking intensity is low, and the product quality of production is inferior, the high temperature lower leaf that has.
(2) all high-alloy steel composite woods all are the end of a period products of being produced separately by each factory, deliver to another factory and carry out compoundly, and it is compound to belong to terminal, rather than the source is compound.
(3) various operation like this, a large amount of metals lose during the course, and a large amount of energy wastes are fallen, and a large amount of auxiliary labors consume, and transport for long-distance in addition etc., see it is great waste from social viewpoint.
(4) all traditional high-alloy steel recombination process all can not be the production of scale, all is little substance production, makes and causes further loss on hand the user.
(5) traditional high-alloy steel recombination process causes seriously restricting the popularization of high-alloy steel composite wood, research and development.
(6) all traditional many high-alloy steel trades mark of complex method incompatibility is compound.
By above narration as can be known, aspect the current composite material that both at home and abroad is coating at the high-alloy steel and the high-alloy steel of the many kinds of production small lot, have serious problems in process route and lectotype selection, this has been a global difficult problem.People propose many schemes for these years, but all do not find the solution of a satisfaction.Patent of invention ZL98124855.1 proposes liquid metals electroslag semi-continuous casting technology and based on the pressure processing of the multiple two rearrangement roll lines of the Y type three rollers scheme that combines in recent years, attempt to address this problem, but this scheme has following problem and can not address the above problem, and this scheme problem is:
(1) though bar by name is a wire rod in fact, the bar size scope is little.
(2) y-type three-roll mill is that old-fashioned roll is non-adjustable, can not adapt to the production of many kinds high-alloy steel.
(3) 45 ° of arranged crosswise duo mills are not suitable for producing the uniform high-alloy steel composite of coating.
(4) the spiral skew rolling mill has the areal deformation characteristics, is not suitable for producing the composite that coating is a high-alloy steel.
Also having an application number is 03137684.3, and publication number is the patent application of CN1514025A, also is the scheme of attempting to solve high-alloy steel production line problem in the recent period.In application, propose with three-roller Y shaped cogging unit, three-roller Y shaped roughing unit, three-roller Y shaped middle milling train group, three-roller Y shaped finishing bar mill group and three-roller Y shaped finishing wire unit, form high alloy steel wire production line of bar, but because following problem, still can not fundamentally overcome the above problems, this scheme problem is:
(1) whole proposal can not be produced the high-alloy steel composite.
(2) for many high-alloy steel, liquid metals electroslag metal die casting triangle base quality can not get guaranteeing.
(3) slab is produced sheet material with tandem mill does not have flexibility, does not fit into the high-alloy steel manufacture of materials.
Also have series of patents ZL98249024.0,96213558.5,9621610.2 all is that liquid metals electroslag smelting casting technology, especially latter two patents emphasis are to be used in nearly net shape products such as producing tool and mould.Can production high-quality high-alloy steel slab and the advantage of high-quality high-alloy steel pipe and do not bring into play them, be not placed on short flow process high-alloy steel panel production line and short flow process high-alloy steel pipe production line is brought into play its considerable advantage.
Technical scheme
Have in view of that, in order fundamentally to solve the existing various serious problems of high-alloy steel and high-alloy steel composite material I process flow, the author proposes from smelting to the productive technology of short flow flow scheme of thermal pressure processing high-alloy steel and high-alloy steel composite, and these schemes are:
(1) high-alloy steel and high-alloy steel composite board productive technology of short flow flow process (Figure 13).
(2) high-alloy steel and high-alloy steel composite pipe productive technology of short flow flow process (Figure 14).
(3) high-alloy steel and high-alloy steel recombination line, bar productive technology of short flow flow process (Figure 15).
According to a preferred embodiment of the invention, the high efficiency shortened process production line of a kind of high-alloy steel and high-alloy steel composite is provided, this production line comprises smelting shop, and the reply steel grade is different and set up the different type of furnaces to smelt, to tackle the different smelting requirements of different high-alloy steel neatly; And several liquid metals electroslag smelting casting technology are made up respectively, can be on the supporting liquid metals electroslag casting equipment of institute according to production requirement arrange production corresponding metal slab and composite plate blanks, pipe and composite pipe blank, circle base and compound round base, all semifinished products can be finished and needn't outsourcing at smelting shop; The thermal pressure job shop, the requirement of various processes when producing according to high-alloy steel adopts online heater to carry out online heating again, carries out thermal pressure processing to guarantee high-alloy steel in optimum pressure processing temperature scope; And adopting hot extrusion technology and modernized flexible Y type three-roll rolling technology to carry out corresponding thermal pressure processing, is that the compression condition is carried out thermal pressure processing to high-alloy steel and composite thereof to guarantee at optimum stress.
According to a preferred embodiment of the invention, the high efficiency shortened process production line of described high-alloy steel and high-alloy steel composite is a core with different liquid metals electroslag smelting casting technology, combine three kinds of high efficiency shortened process production lines that can constitute respectively with corresponding different thermal pressure process technology: (1) high-alloy steel and be the metallic composite panel high efficiency shortened process production line of coating with the high-alloy steel; (2) high-alloy steel and be the metal composite pipe material high efficiency shortened process production line of coating with the high-alloy steel; (3) high-alloy steel and be the metal composite wire bar efficient flow production line of coating with the high-alloy steel.
According to a preferred embodiment of the invention, the described different type of furnaces comprise following three kinds: electric arc furnaces+external refining, intermediate frequency furnace and vaccum sensitive stove.
According to a preferred embodiment of the invention, be equiped with liquid metals electroslag die cast machine, to produce the high-alloy steel slab of different size specification at smelting shop; Also be equiped with liquid metals electroslag smelting casting composition metal device,, supply the high-alloy steel composite plate blanks of the desired different size of thermal pressure job shop neatly to produce the high-alloy steel composite plate blanks of different size specification; These two kinds of smelting-casting equipments combine and can produce two layers, three layers high-alloy steel composite plate blanks; Described these high-alloy steel slabs and high-alloy steel composite plate blanks or supply thermal pressure job shop continue processing, perhaps partly directly supply special subscriber and use.
According to a preferred embodiment of the invention, be equiped with the liquid metals centrifugal electroslag casting equipment of some at smelting shop, to produce the high-alloy steel hollow bloom of single grade of steel; Also be equiped with liquid metals electroslag semi-continuous casting device, produce the hollow bloom of single steel grade, perhaps producing with the high-alloy steel is the composition metal pipe of coating; These two kinds of casting apparatus combine, and can produce two layers, three layers compound pipe, and these smelting-casting equipments can be produced the hollow bloom of different-diameter different wall neatly, thereby can make back step hot extrusion operation produce the tubing of different-diameter different wall; Described these high-alloy steel pipes and high-alloy steel composite pipe blank or supply thermal pressure job shop continue processing, perhaps partly directly supply special subscriber and use.
According to a preferred embodiment of the invention, be equiped with liquid metals electroslag D.C.casting device at smelting shop, this device both can have been produced the same steel grade circle base of different-diameter, and what also can produce different-diameter is the composition metal circle base of coating with the high-alloy steel; Described these high alloy steel round blank and the compound round base of high-alloy steel or supply thermal pressure job shop continue processing, perhaps partly directly supply special subscriber and use.
According to a preferred embodiment of the invention, described online heater, the one, be heated to the start rolling temperature of requirement by the steel grade requirement, the one, in the operation of rolling, heat again being out of shape narrow steel part, add heat request with the different steel grades of flexible reply, this heating simultaneously helps reducing billet oxidization.
According to a preferred embodiment of the invention, in the thermal pressure job shop, at first be provided with step type bar plate heating stove and online heater in described heating process, to guarantee to heat neatly different high-alloy steel steel grades and high-alloy steel composite plate blanks, guarantee that also slab rolled piece in reversible roughing obtains online heating, required different processing temperature scopes with the reply steel alloy; When the thermal pressure job shop establishes reversible roughing mill, also be provided with sheet material finishing mill or rolling finishing mill, and before and after this finishing mill, be provided with insulating roller way and produce smoothly to guarantee above-mentioned high-alloy steel and high-alloy steel composite wood; Such production line both can have been produced the high-quality high-alloy steel sheet material of the single trade mark, and also can produce with the high-alloy steel is the metallic composite panel of coating.
According to a preferred embodiment of the invention,, corresponding hollow bloom is squeezed into the high-alloy steel tubing of different-diameter, different wall, and is outer field composite pipe, the heat treatment of the line pipe of going forward side by side material with high-alloy steel with extruder in the thermal pressure job shop; Perhaps after the hot-working workshop is with the heating of corresponding hollow bloom, on Y type three roll pipe unit and Y type three roller tube reducing sizing units, produces the high-alloy steel tubing of different-diameter different wall and be outer field composite pipe with high-alloy steel.
According to a preferred embodiment of the invention, in the thermal pressure job shop, described round base is after heating, and milling train group, Y type three rollers rod finishing wire unit roll Φ 13mm-Φ 150mm bar in Y type three-high bloomer group, Y type three roller roughing units, Y type three rollers; Or produce Φ 5mm-Φ 13mm wire rod through Y type three roller wire rod finishing mill from the Φ 13mm rolled piece that Y type three roller finishing bar mill groups are come out; On the described continuous rolling production line of forming with y-type three-roll mill, some online eddy-current heating and online temperature regulating device are set, with of the different requirements of the different steel grades of flexible reply to rolling mill practice; For the heavy section that will produce above the 150mm diameter, adopt large-scale round base after heating, on extruder, produce.In sum, common feature of these flow processs is exactly to adopt liquid metals electroslag smelting casting technology at steelshop.Liquid metals electroslag smelting casting technology is the traditional employing of replacement that grows up the nearly more than ten years
Consutrode remelting steel ingot technology is promptly guaranteeing High-efficient Production ESR ingot under the same quality requirements of electroslag melt steel.A series of patented technologies of being applied for the nearly more than ten years by the inventor as can be seen, it comprises:
1) technology of liquid metals founding billet in current-conductive mold.This technology can be produced single trade mark high-alloy steel billet in high quality, can produce the compound billet of high-alloy steel, can produce single trade mark high-alloy steel hollow bloom, can produce high-alloy steel composite hollow circle base.
2) directional solidification becomes the single trade mark sheet billet of high-alloy steel (100-200mm) under slag lid heat-retaining condition utilizing under the crucible waste heat condition for liquid metals electroslag die cast technology, this technology.The slab that this technology is produced is placed in the water mold and heats under the slag bath condition at intensive water-cooled graphite electrode, injects another kind of molten steel and can produce the high-alloy steel composite plate blanks.
3) liquid metals centrifugal electroslag casting technology, this technology is to produce various high-alloy steel hollow blooms in high quality efficiently.This technology combines with above-mentioned first liquid metals electroslag smelting casting technology in current-conductive mold, can High-efficient Production bilayer even three-layer metal composite hollow pipe blank.
Fig. 8,9,10,11,12 shows respectively how the liquid metals electroslag technology produces the schematic diagram of high-alloy steel and high-alloy steel composite plate blanks, high-alloy steel and high-alloy steel composite pipe blank and high-alloy steel and the compound round base of high-alloy steel.
Fig. 8 is a liquid metals electroslag die cast slab schematic diagram.
The following implication of relevant digitized representation:
The 1-crucible; 2-synthesizes cinder ladle; The 3-ladle; The 4-synthetic slag;
The 5-non-consumable electrode; The 6-molten steel; The 7-metal pattern; The 8-radiant heat;
The 9-slab; 10-solid synthetic slag.
Liquid synthetic slag 4 and molten steel 6 are earlier after in cinder ladle 2 and the ladle 3 injection crucibles 1, melt cinder is floating to molten steel surface formation liquid slag layer through molten steel, 5 pairs of slag baths of one group of non-consumable electrode heat then, metal pattern 7 on the certain hour bonnet, through one locking and the switching mechanism (not shown) with crucible 1 and metal pattern 7 common Rotate 180 degree, melt cinder 4 at first enters in the mould 7, the very little part of slag liquid that is introduced into forms slag blanket on die cavity wall, enter behind the molten steel in the mould, most melt cinder floats to the molten steel surface through molten steel 6.After this molten steel 6 enters solidification stages, because crucible 1 sends radiant heat downwards, slag blanket is in the condition of high temperature all the time in process of setting, thereby causes the advantage of molten steel 6 from the bottom-up directional solidification in mould 7 bottoms, thereby produces the electroslag slab of high-quality under the non-cap pig's tongue spare of no cast gate.
Fig. 9 is a liquid metals slag smelting founding bimetallic slab schematic diagram.
The following implication of relevant digitized representation:
General steel of 1-or low-alloy steel billet; The 2-water mold; 3-synthesizes slag bath;
The 4-non-consumable electrode; The 5-ladle; 6-high alloy molten steel; 7-high-alloy steel coating;
Place a water mold 2 on general steel or the low-alloy steel billet 1, in the crystallization above the liquid synthetic slag 3 injection steel billets, fall non-consumable electrode 4 in groups immediately, slag bath is heated, after treating the billet surface fusing, the high-alloy steel molten steel 6 that reinjects is realized metallurgical compound with steel billet 1.This moment, melt cinder 3 was floating to high-alloy steel molten steel 6, under the condition of non-consumable electrode 4 heating slag baths in groups, realized the high-alloy steel liquid, directional solidification, realized the bimetallic recombination process.
Here to illustrate that this process also can realize by following process.Promptly all in a crystallizer, inject a kind of molten steel earlier, under the condition of electroslag heating, progressively solidify, inject second kind of molten steel between when appropriate then, with the slab of first kind of solid shape that has solidified formation metallurgical compound after, also under the condition of non-consumable electrode electroslag heating, progressively make second kind of solidification of molten steel form synthetic base.
Here to illustrate more that what this covering device was natural can directly produce single trade mark slab.
Figure 10 is a liquid metals centrifugal electroslag casting hollow bloom schematic diagram.
The following implication of relevant digitized representation:
The 1-mold; The 2-slag crust; The 3-melt cinder; The 4-liquid metals; 5 hollow blooms.
It is melt cinder that a process demonstrates the upper strata, lower floor be the ladle of liquid metals when mold 1 cast, melt cinder 3 at first injects in the rotating mould 1, except on a small quantity die wall forms slag crust 2, most ofly keeps liquid;
The b procedural representation is after and then melt cinder 3 is gone into mould 1, and liquid metals 4 just injects in rotating mould 1, and under centrifugal action, liquid metals 4 proceeds to die wall, and melt cinder 3 freedom of entry surfaces are refined metals and creating conditions for the metal directional solidification at last at the volley;
The c procedural representation forms the final process of hollow bloom 5.
Figure 11 is semicontinuous founding pipe of liquid metals electroslag and bimetallic pipe schematic diagram.
The following implication of relevant digitized representation:
The 1-apparatus for pouring; 2-water-cooled plug; 3-liquid synthetic slag; The 4-molten steel;
The pipe that 5-solidifies; 6-superposing type current-conductive mold; 7-core pipe.
The a process is illustrated in to have in the device that superposing type current-conductive mold 6 and water-cooled plug 2 form injects synthetic slag 3 earlier, injects molten steel 4 through installing 1 by certain batch then, by the pipe that the downward pull of certain speed has solidified, produces hollow bloom D.C.casting.
The b process illustrates, in superposing type current-conductive mold 5, place a hollow bloom 7, inject synthetic slag 3, synthetic slag 3 obtains heating in crystallizer, and press the certain speed rotation, so that molten steel 4 is injected by certain batch then in fusing pipe surface, molten steel 4 realizes that with pipe 7 metallurgy is compound, realizes the production of bimetallic pipe in compound good bimetallic pipe 5 moves downward.
Here it may be noted that a process can independently be produced single trade mark pipe, also can cooperate the b process, need compound pipe for the b process provides.
Here it is to be noted more that liquid metals centrifugal electroslag casting hollow bloom can be produced the hollow bloom of the single trade mark of high-quality high-alloy steel equally, makes it to combine with the b process, provides the b process required pipe.
Here it may be noted that also that changing different crystallizers can be at b process composite three-layer composite pipe blank.
Here it may be noted that above process is not got rid of the liquid electro-slag continuous casting.
Figure 12 is semicontinuous founding circle base of liquid metals electroslag and bimetallic circle base schematic diagram.
The following implication of relevant digitized representation:
The a:1-apparatus for pouring; 2-liquid synthetic slag; The 3-molten steel;
The steel billet that 4-solidifies; 5-superposing type current-conductive mold.
The b:1-apparatus for pouring; 2-liquid synthetic slag; The 3-molten steel;
The 4-composite bed; 5-superposing type crystallizer; The 6-plug.
The a process is injected certain quantity of fluid synthetic slag 3 earlier in current-conductive mold 5, behind certain hour, inject quantitative molten steel 3 through apparatus for pouring 1, move down the electroslag circle base that has solidified by certain speed again, thus can D.C.casting or continuous casting ground production high-alloy steel electroslag circle base.
The b process is placed one and is wanted compound round base 6 in current-conductive mold, this circle base can be to produce from another current-conductive mold.Inject liquid synthetic slag 2 then, this liquid slag is by conduction crystallization power supply heating and rotation, making needs compound round base 6 top layers fusing, in time quantitative injects another kind of molten steel by device 1, realize metallurgical compound with circle base 6, move down (or the crystallizer that moves up) compound bimetallic circle base by certain speed, realize that electroslag D.C.casting or continuous casting ground produce the compound electroslag base of high-quality high-alloy steel.
Here it may be noted that no matter a, b process changing under the current-conductive mold condition, can be produced large-scale round base at existing equipment.
In above-mentioned three process schemes,, make and on beginning of production, to realize the metallurgical compound of high-alloy steel and high-quality carbon junction steel or the high linking intensity of low-alloy steel, create conditions for shortening production procedure significantly owing to adopt liquid metals electroslag smelting casting technology.
In above-mentioned three process schemes owing to adopt liquid metals electroslag smelting casting technology, can produce different trade mark high-alloy steel steel billets and compound base neatly at steelshop, can produce the steel billet of different size specification, produce different steel grades neatly for thermal pressure processing later on and create good condition, be the whole process flexible production and create conditions.
In above-mentioned three process schemes, all used online heating, guaranteed the requirement of various processes when high-alloy steel is produced, guaranteed that high-alloy steel carries out pressure processing in optimum pressure processing temperature scope, eliminated several cold several heat in the conventional method and the energy waste and the discontinuous problem of operation that cause.
Having embodied high-alloy steel and composite thereof in above-mentioned three schemes, is to carry out thermal pressure processing under the compression condition at optimum stress, promptly adopts hot extrusion technology and modernized flexible Y type three-roll rolling technology.Different extrusion dies, y-type rolling mill is changed fast, and the y-type rolling mill unit is numerical control pass speed governing fast completely, and quick single rolling mill numerical control speed governing completely adapts to various high-alloy steel different qualities neatly when having guaranteed pressure processing.The Y type tandem rolling unit that adopts in scheme 3, this unit is seen patent of invention (ZL01136638.9) line bar rolling mill and tandem rolling unit.This tandem rolling unit can guarantee that high-alloy steel rolled piece surface does not crack, and helps the rolled piece grain refinement.
Realize that in a word above-mentioned three schemes are guaranteed technically.
After implementing above-mentioned three process schemes, will be to high-alloy steel production model upgrading, will be to the steel products architecture advances, and then development and national economy produced great immeasurable influence:
1) changed the existing pattern that falls behind of domestic and international high-alloy steel production at one stroke, helped the steel and iron industry product, created condition for turn to iron and steel power from big steel country to the development of the high technology content high added value high alloy line of production.Make the high-alloy steel production model stand in world's peak and have great strategic importance.
2) realization of new model is simplified and flexibility the high-alloy steel production process greatly, thereby reduces energy consumption per ton steel significantly, reduces ton steel metal consumption significantly, reduces ton steel operation expense significantly, thereby reduces the high-alloy steel production cost significantly.
3) realization of new model realizes electric arc furnaces+external refining+liquid metals electroslag smelting casting at metallurgical plant, becomes best combination pattern in the high-alloy steel production, and all strands all are the electroslag bases, and it is flat that slab quality reaches the electroslag molten steel.And the pressure processing process all realizes under the compression condition subsequently, y-type three-roll mill particularly, the full cross section deformation of rolled piece when rolling, the full section fragmentation of crystal grain, thereby make the product flawless, the steel grain refinement, net carbide inhomogeneities rank is low, thereby all high-alloy steel product quality class are increased substantially.
4) realization of new model, can realize unordered rolling, precision rolling, the high-alloy steel steel size of supply can satisfy any requirement of user, dimensional tolerance in ± 0.15mm, but particularly excellent wire rod deep processing to Φ 5mm, this will make downstream user save substantial contribution.
5) above-mentioned three production lines also have a common feature, are exactly the high-alloy steel that each bar production line can be produced the single trade mark, can produce the high-alloy steel composite wood again, and this point has meaning.Compound high-alloy steel of electroslag metallurgy and low-alloy or high quality carbon structural steel, the compound bond strength of this metallurgy is big, and full section connects continuous, and back step pressure processing operation is extruding or Y type three-roll rolling, guarantees that more connection is tightr, and coating is even.Solved up to now as high-alloy steel composite wood quality instability problem, realized that high-alloy steel such as high abrasion, highly corrosion resistant, high heat-resisting quantity and high strength, high tenacity base material high-quality are compound.Thereby, economic all departments at home lay a solid foundation for promoting the high-alloy steel composite.Thereby, country lays reliable basis for can saving 60-80% high alloy steel.Should point out that more the popularization of high-alloy steel material will be saved strategic resources such as chromium, nickel, tungsten, molybdenum and vanadium in a large number, for important prerequisite has been created in the sustainability production of high-alloy steel, this has strategic importance.
6) the existing technological process of production of the high-alloy steel process for producing composite material flow process of new model has shortened tens links.New model is that the source is compound, and a large amount of energy of old pattern saving have been saved a large amount of operation expenses, have saved a large amount of auxiliary expenses, have saved a large amount of metal materials.Meanwhile, new model is the big substance production of scale, and composite wood substance maximum can reach 8 tons, the minimum hundreds of kilogram of bar, so new model production all can obtain big benefit to manufacturing enterprise and user both sides.
Other advantage of the present invention, target and feature will be set forth in the explanation hereinafter to a certain extent, and to a certain extent, based on to investigating hereinafter, will be conspicuous to those skilled in the art, perhaps can be shown from the practice of the present invention.Target of the present invention and other advantages can be passed through following specification, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, concentrate below and list relevant accompanying drawing:
Wherein, high-alloy steel and the high-alloy steel composite wood technological process of production of Fig. 1-Fig. 7 for falling behind;
Fig. 1 is traditional high-alloy steel plank stuff production technology flow process;
Fig. 2 is traditional high-alloy steel tubing technological process of production;
Fig. 3 is external high-alloy steel wire and rod material production technology flow (is example with the high-speed steel);
Fig. 4 thinks than the advanced high-alloy steel technological process of production (is example with the high-speed steel) for China is current;
Fig. 5 is a high-alloy steel composite board production traditional handicraft route;
Fig. 6 is a high-alloy steel composite pipe traditional processing technology route;
Fig. 7 is a high-alloy steel composite bar traditional processing technology route;
More than 7 flow processs done detailed description in background technology.
Fig. 8-Figure 12 is a liquid metals electroslag smelting casting new technology schematic diagram;
Fig. 8 is a liquid metals electroslag die cast slab schematic diagram;
Fig. 9 is a liquid metals slag smelting founding bimetallic slab schematic diagram;
Figure 10 is a liquid metals centrifugal electroslag casting hollow bloom schematic diagram;
Figure 11 is semicontinuous founding hollow bloom of liquid metals electroslag and bimetallic hollow bloom schematic diagram;
Figure 12 is semicontinuous founding circle base of liquid metals electroslag and bimetallic circle base schematic diagram;
More than when introducing core new technology of the present invention, done detailed description.
Three the high efficiency shortened process production lines of Figure 13-15 for the present invention relates to.
Figure 13 is the abbreviated system route that high-alloy steel and high-alloy steel composite board are produced;
Figure 14 is the abbreviated system route that high-alloy steel and high-alloy steel composite pipe are produced;
Figure 15 is the productive technology of short flow route of high-alloy steel and high-alloy steel recombination line bar;
More than three flow processs will elaborate below as core of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.It should be noted that the present invention is not subjected to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and actual conditions.
Hereinafter with reference to Figure 13-15, introduce the high efficiency shortened process process route that three high-alloy steel and high-alloy steel composite are produced in detail.
Figure 13 is the high efficiency shortened process production process route that high-alloy steel and high-alloy steel composite board are produced.
The road is a smelting procedure, and three kinds of type of furnaces are arranged, and a kind of is electric arc furnaces+external refining; A kind of is intermediate frequency furnace; A kind of is vaccum sensitive stove.With the different metallurgical requirements of high-alloy steel of reply different qualities, also in order to tackle different requirements of ordering goods in batches, it is different and set up the different type of furnaces promptly to tackle steel grade.
Second operation work is a liquid metals electroslag smelting casting slab operation, on the supporting electroslag casting equipment of this operation, can or produce the high-alloy steel slab of the single trade mark or produce high-alloy steel+high-quality carbon junction steel or low-alloy steel composite plate blanks, also can produce high-alloy steel+carbon junction steel or low-alloy steel+high-alloy steel three-layer composite board base according to scheduling of production.
Three process, because the steel slab surface quality is good, the cleaning amount is little, mainly be to remove slag crust, in hot state cleaning, can direct red commentaries on classics.
The 4th procedure, red flap base heats in walking-beam furnace, and this stove Control for Kiln Temperature requires that minimum temperature in all steel grades.
Five processes, online heating, this heater is contained between walking-beam furnace and the reversible roughing mill on the roller-way.Its effect has two: one, is heated to the start rolling temperature of requirement by the steel grade requirement, and the one, in the operation of rolling, heat again being out of shape narrow steel part, add heat request with the different steel grades of flexible reply, this heating simultaneously helps reducing billet oxidization.
The 6th procedure, slab is repeat-rolling on the reversible roughing mill of four rollers, because the milling train front has and onlinely heating arranged and in the milling train back on-line insulating device is arranged, and guarantees that the steel grade of those deformation temperature narrow range can be rolling smoothly, guarantee that the little steel grade of those each drafts requirements realizes rolling smoothly.Because slab is regular, this operation also can directly be produced special heavy plate.
The 7th procedure, the reversible finishing mill rolled plate of four rollers, because finishing mill can shut out the sheet material of minimum thickness 5mm, because roughing mill rolled piece Controllable Temperature, again because the existence of insulating roller way, the rolled piece that enters finishing mill is in good state of temperature, because finishing mill has insulating roller way after rolling, can guarantee effectively that various high-alloy steel are rolled smoothly again.
Figure 14 is the high efficiency shortened process process route that high-alloy steel and high-alloy steel composite pipe are produced.
First procedure is a smelting procedure, has the multiple type of furnace such as electric arc furnaces+external refining, intermediate frequency furnace, vaccum sensitive stove etc. tackling the different requirements of different high-alloy steel products to smelting, thereby flexibility is arranged on the type of furnace.
Second operation work is a liquid metals electroslag smelting casting operation, and it is the semicontinuous hollow bloom Casting Equipment of liquid metals electroslag of core with the current-conductive mold that this operation has some groups.The corresponding holding furnace of each D.C.casting equipment is to accept the molten steel of being sent here by smelting procedure.Liquid metals electroslag smelting casting D.C.casting equipment can be produced the hollow bloom of various outer diameter, internal diameter, different-thickness neatly by changing different crystallizer internal diameters and water-cooled mandrel.Some liquid metals centrifugal electroslag casting machines are equipped with in this operation, to produce hollow bloom, as high quality carbon knot pipe, low-alloy steel pipe, high-alloy steel pipe, supply liquid metals electroslag D.C.casting device is combined into two layers or three layers of composite hollow pipe blank etc.As (1) internal layer is high-alloy steel, and skin is carbon junction steel or low-alloy steel hollow bloom; (2) internal layer is high-quality carbon junction steel or low-alloy steel, and skin is the hollow bloom of high-alloy steel; (3) internal layer is a high-alloy steel, and the intermediate layer is the high-quality carbon junction steel, and skin is three layers of composite hollow pipe blank of high-alloy steel.These composite pipe blanks can have different inside and outside footpaths.
Three process is an annealing operation, and the annealing of above-mentioned pipe eliminating stress, and is prepared for back step operation machined.
The 4th procedure is with above-mentioned pipe turning.
Five processes is with above-mentioned pipe boring endoporus.
The 6th procedure is with above-mentioned pipe face work.
The 7th procedure gives heat with above-mentioned pipe.
The 8th procedure is with above-mentioned heating of pipe blank.
The 9th procedure is coated with lubricant.
The tenth procedure at extruder corresponding pipe is squeezed into different-diameter, different-thickness high-alloy steel tubing, and high-alloy steel is outer field composite pipe.
The 11 procedure, tubing heat treatment.
Except that above-mentioned flow process, this is that what need to propose is that hollow bloom also can no longer illustrate on this flow chart here in heating after Y type three-roll pipe mill and Y type three roller sinking sizing mill groups shut out high-alloy steel and high-alloy steel composite material pipe.
Figure 15 is the high efficiency shortened process process route of high-alloy steel and high-alloy steel recombination line bar production.
First procedure is for smelting, and the type of furnace has electric arc furnaces+external refining, intermediate frequency furnace, vaccum sensitive stove, with the requirement of the different high-alloy steel of flexible reply to the smelting mode.
Second operation work is the liquid metals electroslag smelting casting, liquid metals electroslag D.C.casting device that to be provided with some groups (three every group) be core with the current-conductive mold and corresponding holding furnace, this device both can have been produced the high-alloy steel and the circular alloy blank of the different trades mark, and also can produce with high-alloy steel is the metallurgical compound round base that goes out on the matrix at high-quality carbon junction steel or low-alloy steel.These circle base diameters can be between Φ 120-Φ 200mm or are bigger, neatly for base to adapt to the different processing technologys of different steel grades.
Three process is hot state Hand scarf.
The 4th procedure is the insulation of circle base, and the reply step heating-furnace is asynchronous with smelting-casting equipment output.
The 5th road is a heating process, and this operation is provided with walking beam furnace and online heating furnace, and walking beam furnace has pre-thermal property.Online heater has constant temperature character, in order that reduce the blank oxidation and tackle the different heating cycle of different high-alloy steel flexibly.
The 6th procedure is the hot rolling cogging operation, this operation is equipped with 6 800Y type three-roll continuous rolling cogging units, this unit is by changing fast milling train and full unit numerical control rapid adjustment pass, tackling the different heat processing techniques of different high-alloy steel, and the reply different-diameter come base.And between cogging unit and roughing unit, be provided with the online heater and the temperature regulating device of quick exchange, to tackle the different technological requirement of different steel grades.This unit pass all is a circle-system of circles system.
The 7th procedure is the roughing operation, and this operation is equipped with 6 600Y types, three roller roughing units, and this unit is by changing fast milling train and full unit numerical control rapid adjustment pass, tackling the different heat processing techniques of different high-alloy steel, and different diameter supplied materials.And between roughing mill and middle milling train, being provided with the online heater and the online temperature regulating device of quick exchange, this unit pass all is a circle-system of circles system.
The 8th procedure rolls operation in being, this operation is equipped with 6 500Y type three-high mill units, and this unit is dealt with different hot rolling technology of different high-alloy steel and different supplied materials by quick replacing milling train and full unit numerical control rapid adjustment pass.And between middle milling train group and mm finishing mill unit, be provided with interchangeable online insulation or temperature regulating device.This unit can independently shut out Φ 100-Φ 150mm bar disorderly simultaneously, and these bars comprise composite wood.Dimensional tolerance maximum ± 0.2mm, whole unit pass is circle-system of circles system.
The 9th procedure is a bar finish rolling operation, and this operation is equipped with 6 370Y type three-high mill units, by quick replacing milling train and numerical control rapid adjustment pass, shuts out Φ 13-Φ 100mm bar.And between Φ 13-Φ 100mm, can unorderedly shut out product, and comprise composite wood, the unit pass is circle-system of circles system, dimensional tolerance maximum ± 0.12mm.
The tenth procedure is the finishing wire operation, this operation is equipped with 10 210Y types, three roller finishing mill units, can directly attract Φ 13 circle rolled pieces from the finishing bar mill group, produce the unordered product of size between the Φ 5-Φ 13mm, dimensional tolerance maximum ± 0.1mm through 10 milling trains.
Except that above-mentioned flow process, at producing, can adopt more large-scale above-mentioned high alloy steel round blank and the compound base of high-alloy steel after heating greater than Φ 150mm heavy section, produce large-scale high-alloy steel and the compound roundwood of high-alloy steel at extruder, also no longer on flow chart, illustrate.
It is to be noted at last, in described three short-flow production lines, under many situations, high-alloy steel slab and high-alloy steel composite plate blanks, high-alloy steel pipe and the high-alloy steel composite pipe blank produced in liquid metals electroslag smelting casting operation, the compound round base of high-alloy steel and high-alloy steel, owing to have its good isotropic mechanical property, can directly supply the user near the forging attitude.If make some degenerative treatments when founding, these high-alloy billets of being produced more will have extraordinary serviceability, satisfy the needs of some special subscribers.Then naturally be considered as scope of the present invention, be considered as the ultrashort flow process in three short flow processs of the present invention.The line production line of bar that proposes of the present invention for example is defined as Φ 150mm on the production specification again, is the steel grade at extremely difficult distortion.Its upper limit of some high-alloy steel can surpass this number, then also should be considered as within the scope of the invention.
In a word, the above only is preferred three examples of the present invention, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification to the present invention, and does not break away from the spirit and scope of the present invention.If therefore of the present invention revise and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention comprises these changes and modification naturally interior.
Claims (10)
1. the high efficiency shortened process production line of high-alloy steel and high-alloy steel composite, this production line comprises:
Smelting shop, the reply steel grade is different and set up the different type of furnaces to smelt, to tackle the different smelting requirements of different high-alloy steel neatly;
And several liquid metals electroslag smelting casting technology are made up respectively, can be on the supporting liquid metals electroslag casting equipment of institute according to production requirement arrange production corresponding metal slab and composite plate blanks, pipe and composite pipe blank, circle base and compound round base, all semifinished products can be finished and needn't outsourcing at smelting shop;
The thermal pressure job shop, the requirement of various processes when producing according to high-alloy steel adopts online heater to carry out online heating again, carries out thermal pressure processing to guarantee high-alloy steel in optimum pressure processing temperature scope;
And adopting hot extrusion technology and modernized flexible Y type three-roll rolling technology to carry out corresponding thermal pressure processing, is that the compression condition is carried out thermal pressure processing to high-alloy steel and composite thereof to guarantee at optimum stress.
2. according to the high efficiency shortened process production line of right 1 described high-alloy steel and high-alloy steel composite, its feature is that also with different liquid metals electroslag smelting casting technology be core, combine three kinds of high efficiency shortened process production lines that can constitute respectively with corresponding different thermal pressure process technology:
(1) high-alloy steel and be the metallic composite panel high efficiency shortened process production line of coating with the high-alloy steel;
(2) high-alloy steel and be the metal composite pipe material high efficiency shortened process production line of coating with the high-alloy steel;
(3) high-alloy steel and be the metal composite wire bar efficient flow production line of coating with the high-alloy steel.
3. according to the high efficiency shortened process production line of right 1 or 2 described high-alloy steel and high-alloy steel composite, its feature is that also the described different type of furnace comprises following three kinds:
Electric arc furnaces+external refining, intermediate frequency furnace and vaccum sensitive stove.
4. according to the high efficiency shortened process production line of each described high-alloy steel of right 1-3 and high-alloy steel composite, its feature also is:
Be equiped with liquid metals electroslag die cast machine at smelting shop, to produce the high-alloy steel slab of different size specification;
Also be equiped with liquid metals electroslag smelting casting composition metal device,, supply the high-alloy steel composite plate blanks of the desired different size of thermal pressure job shop neatly to produce the high-alloy steel composite plate blanks of different size specification;
These two kinds of smelting-casting equipments combine and can produce two layers, three layers high-alloy steel composite plate blanks;
Described these high-alloy steel slabs and high-alloy steel composite plate blanks or supply thermal pressure job shop continue processing, perhaps partly directly supply special subscriber and use.
5. according to the high efficiency shortened process production line of each described high-alloy steel of right 1-3 and high-alloy steel composite, its feature also is:
Be equiped with the liquid metals centrifugal electroslag casting equipment of some at smelting shop, to produce the high-alloy steel hollow bloom of single grade of steel;
Also be equiped with liquid metals electroslag semi-continuous casting device, produce the hollow bloom of single steel grade, perhaps producing with the high-alloy steel is the composition metal pipe of coating;
These two kinds of casting apparatus combine, and can produce two layers, three layers compound pipe, and these smelting-casting equipments can be produced the hollow bloom of different-diameter different wall neatly, thereby can make back step hot extrusion operation produce the tubing of different-diameter different wall;
Described these high-alloy steel pipes and high-alloy steel composite pipe blank or supply thermal pressure job shop continue processing, perhaps partly directly supply special subscriber and use.
6. according to the high efficiency shortened process production line of each described high-alloy steel of right 1-3 and high-alloy steel composite, its feature also is:
Be equiped with liquid metals electroslag D.C.casting device at smelting shop, this device both can have been produced the same steel grade circle base of different-diameter, and what also can produce different-diameter is the composition metal circle base of coating with the high-alloy steel;
Described these high alloy steel round blank and the compound round base of high-alloy steel or supply thermal pressure job shop continue processing, perhaps partly directly supply special subscriber and use.
7. according to the high efficiency shortened process production line of each described high-alloy steel of right 1-3 and high-alloy steel composite, its feature also is:
Described online heater, the one, be heated to the start rolling temperature of requirement by the steel grade requirement, the one, in the operation of rolling, heat again being out of shape narrow steel part, add heat request with the different steel grades of flexible reply, this heating simultaneously helps reducing billet oxidization.
8. according to the high efficiency shortened process production line of right 4 described high-alloy steel and high-alloy steel composite, its feature also is:
In the thermal pressure job shop, at first be provided with step type bar plate heating stove and online heater in described heating process, to guarantee to heat neatly different high-alloy steel steel grades and high-alloy steel composite plate blanks, guarantee that also slab rolled piece in reversible roughing obtains online heating, required different processing temperature scopes with the reply steel alloy;
When the thermal pressure job shop establishes reversible roughing mill, also be provided with sheet material finishing mill or rolling finishing mill, and before and after this finishing mill, be provided with insulating roller way and produce smoothly to guarantee above-mentioned high-alloy steel and high-alloy steel composite wood;
Such production line both can have been produced the high-quality high-alloy steel sheet material of the single trade mark, and also can produce with the high-alloy steel is the metallic composite panel of coating.
9. according to the high efficiency shortened process production line of right 5 described high-alloy steel and high-alloy steel composite, its feature also is:
In the thermal pressure job shop, with extruder corresponding hollow bloom is squeezed into the high-alloy steel tubing of different-diameter, different wall, and is outer field composite pipe, the heat treatment of the line pipe of going forward side by side material with high-alloy steel;
Perhaps after the hot-working workshop is with the heating of corresponding hollow bloom, on Y type three roll pipe unit and Y type three roller tube reducing sizing units, produces the high-alloy steel tubing of different-diameter different wall and be outer field composite pipe with high-alloy steel.
10. according to the high efficiency shortened process production line of right 6 described high-alloy steel and high-alloy steel composite, its feature also is:
In the thermal pressure job shop, described round base is after heating, and milling train group, Y type three rollers rod finishing wire unit roll Φ 13mm-Φ 150mm bar in Y type three-high bloomer group, Y type three roller roughing units, Y type three rollers;
Or produce Φ 5mm-Φ 13mm wire rod through Y type three roller wire rod finishing mill from the Φ 13mm rolled piece that Y type three roller finishing bar mill groups are come out;
On the described continuous rolling production line of forming with y-type three-roll mill, some online eddy-current heating and online temperature regulating device are set, with of the different requirements of the different steel grades of flexible reply to rolling mill practice;
For the heavy section that will produce above the 150mm diameter, adopt large-scale round base after heating, on extruder, produce.
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