CN106884118A - Forging Electroslag Cladding high-speed steel roll and its manufacture method - Google Patents
Forging Electroslag Cladding high-speed steel roll and its manufacture method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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Abstract
The invention discloses one kind forging Electroslag Cladding high-speed steel roll and its manufacture method, belong to roll manufacturing technology field, the chemical constituent and its weight/mass percentage composition of outer layer are in roll：Carbon 0.70~1.50%, silicon 0.20~1.20%, manganese 0.20~1.00%, chromium 4.00~12.00%, molybdenum 2.00~6.00%, vanadium 1.00~4.00%, tungsten 0.80~4.00%, nickel≤0.80%, phosphorus≤0.02%, sulphur≤0.02%, remaining is iron.Preparation method includes the shaping of tubular electrode, forging composite steel billet, conditioning treatment, machining and finished heat treatment step.Obtained finished product, body of roll surface hardness is 80~100HSD, and outer layer has excellent wearability, roughness retaining capability high and structure stability high etc., and core and roll neck hardness are 30~45HSD, with excellent toughness, tensile strength high.
Description
Technical field
The present invention relates to one kind forging Electroslag Cladding high-speed steel roll and its manufacture method, belong to roll manufacturing technology neck
Domain.
Background technology
Roll, as the industrial important tool of steel rolling, is the main consumable part of steel rolling equipment.Roll is one kind not
With the workpiece for being molded intermetallic composite coating by way of extruding under state, the requirement of its body of roll has anti-wear performance high, height
Impact strength, structure stability high, and roll neck is needed with good toughness and tensile strength.Exist to meet roll
The body of roll is different with roll neck in use needs, and reduces manufacturing cost generally using various complex methods：Such as centrifugal compound, Quan Chong
Wash the technologies such as compound, molten multiple, the rotation Electroslag Claddings of electroslag of compound, CPC.Semi-high speed steel, high speed that wherein centrifugal compound is produced
Steel hot roll core is alloy ductile iron, is limited by roll neck intensity and is only used for thin plate hot rolling.With scientific technological advance, ferrite
, in the application of hot rolling, and high-performance cold rolled technology etc. is all for the performance steel rolling technology high such as the big Reduction Technology of rolling technique, low temperature
Requirements at the higher level are proposed to roller neck intensity and body of roll performance.
In the operation of rolling, when body surface is contacted with red-hot stocking, temperature is raised rapidly Heat Working Rolls, then quilt
Rapid water-cooled, the body of roll radially produces very steep thermograde, and then causes the nearly top layer of the body of roll to produce very big alternation heat to answer
Power, under the ringing of this alternating thermal stress, body surface gradually produces micro-crack；When occur steel-fastening, skidding, curling round the roll,
During the rolling accident such as roll banding, the deformation heat of frictional heat and stocking between stocking and roll increases suddenly in very short time, makes office
Portion's roll surface temperature rises rapidly, and metal is expanded herein, forms very huge pressing stress, causes local elasticity's compression, with this
Rolling mill power is also substantially increased simultaneously.When combined stress exceedes roll material elastic limit at this temperature, that is, produce
Plastic compression deformation；Roll breakage will be caused when combined stress exceedes the ultimate strength of material, so as to cause larger rolling thing
Therefore.As current rolled plate develops to high-strength steel, ultrathin strip, rolling rhythm to serialization, the outer layer to tropical roll resists
Cool-hot fatigue ability, roll neck tensile strength propose requirement higher, working lining and core that traditional centrifugation is produced
Nodular cast iron material progressively will be replaced by higher performance material.
Cold roll will bear very big rolling stress in the course of the work, add rolled piece weld seam, be mingled with, side is split etc. asks
Topic, its condition of work is severe, is easily caused instantaneous high-temperature so that cold roll is subject to strong thermal shock, easily causes crackle, glues
Roller, peeling are even scrapped.Due to cold roll in the course of the work suffered stress greatly, cold rolling roller surface is often peeling, chip off-falling,
The failure modes such as abrasion, therefore it is required that its body surface possesses at a relatively high hardness, wearability and crack resistance, while its roll neck
There are bending strength high, enough toughness, it is ensured that counter-bending fatigue strength etc..
It is used for manufacturing material mainly Cr3 and the Cr5 series of cold roll on current domestic and international market, Cr2 series is big multiplex
In small-sized cold-rolling mill and the poor reversable cold-rolling machine of part equipment；Cr3 series cold rolls are mostly used for reversable cold-rolling machine
And part Large Scale Cold milling train；Current Cr5 series is the main flow material of Chinese forging steel cold roll, most of cold-rolling mills and band
The substantially all use Cr5 series of tasks roller of quality requirement Reversible Single Stand Cold Rolling Mill higher and intermediate calender rolls.
With the high speed development of the industries such as automobile, household electrical appliances, electronics, to the quality requirement of flat cold-rolled sheet and silicon steel sheet continuous
Improve, to the quality requirement of cold roll also more and more higher.And the cold roll of above-mentioned chromium steel series is in rolled sheet metal or silicon steel sheet
When, often occur the phenomenon skidded between working roll and material to be rolled in the operation of rolling；In working roll by using soon
Afterwards, many work roll surface roughness are drastically reduced, and directly affect the surface quality and product percent of pass of rolled plate.These
Situation be all due to the wearing no resistance of working roll, surface roughness holding capacity difference is caused.Conventional high-carbon chromium steel cold roll
Due to being limited by material itself, while possessing higher abrasion resistance, it is difficult to possess good anti-accident ability, therefore cold
Roll under the use environment higher to the requirement of cold roll combination property such as silicon steel, the limitation of conventional high-carbon chromium steel cold roll material
Just highlight.Current these problems are general to be solved by frequently changing working roll or carrying out texturing and chromium plating to working roll,
But these methods can not only reduce cold-rolling mill operating rate, manufacturing schedule is influenceed, and working roll texturing and chromium plating are expensive,
Production cost is increased, while also result in environmental pollution, should not on a large scale, apply for a long time.
It is higher comprehensive to obtain with the continuous improvement required combination properties such as cold roll wearability, anti-accident performances
Performance is closed, Cold Work Roll Material alloying levels are improved, making alloying level cold roll higher has turned into cold rolled sheet
With the developing direction of roller, forging high-speed steel, semi-high speed steel cold roller turn into the latest development direction of cold roll material.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of forging Electroslag Cladding high-speed steel roll and its manufacture method,
The working lining of the roll barrel has high-wearing feature, roughness retaining capability high and a structure stability high, and roll neck has high strong
Toughness, adapts to current hot roll higher and cold roll job requirement.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
One kind forging Electroslag Cladding high-speed steel roll, chemical constituent and its weight/mass percentage composition in body of roll outer layer are：C
0.70~1.50%, Si 0.20~1.20%, Mn 0.20~1.00%, Cr 4.00~12.00%, Mo 2.00~
6.00%, V 1.00~4.00%, W 0.80~4.00%, Ni≤0.80%, P≤0.02%, S≤0.02%, remaining is Fe
With inevitable impurity；Core is that low-alloy steel or body of roll working lining use the forged steel working roll scrapped.
Technical solution of the present invention further improvement is that：Chemical constituent and its weight/mass percentage composition in body of roll outer layer
For：C 0.90~1.30%, Si 0.40~1.00%, Mn 0.40~0.90%, Cr 8.00~12.00%, Mo 3.50~
5.00%, V 1.50~3.00%, W 0.90~2.00%, Ni≤0.60%, P≤0.02%, S≤0.02%, remaining is Fe
With inevitable impurity.
A kind of manufacture method for forging Electroslag Cladding high-speed steel roll, comprises the following steps that：
A, refining tubular electrode：Raw material is smelted in smelting furnace, then molten steel is placed in refining furnace, to molten steel
Refined, molten steel is placed in ladle after the completion of refining, incited somebody to action under the effect of centrifuge power and under the conditions of gas shield
Molten steel casts tubular electrode ingot, is made the compound electroslag ingots of ESR using electroslag remelting complex method afterwards；
B, forging composite steel billet：By the compound electroslag ingots of ESR obtained in step A by heating, insulation, die forging into roller stock；
C, conditioning treatment：Conditioning treatment is carried out to roller stock, 1000~1050 DEG C of insulation 18~25h after-blow are first heated to
Air cooling；Air cooling after 800~850 DEG C of 15~20h of insulation is again heated to, temper is finally carried out, temperature is 630~
680 DEG C, tempering time is 70~100h；
D, machining and finished heat treatment：Roller stock is carried out into roughing, through ultrasonic examination inspection it is qualified after, to roller stock
Body of roll top layer carry out continuous induction hardening, hardening heat is 1100~1210 DEG C, and roller stock is carried out into temper afterwards, is tempered
Temperature is 460~580 DEG C, and room temperature is air cooled to after 20~30h of insulation；
After the completion of tempering, roller stock is finished by required size, be made roll, carried out ultrasound examination, hardness and survey
Examination and microstructure examination.
Technical solution of the present invention further improvement is that：Smelting temperature is 1580~1680 DEG C, refining temperature in step A
It it is 1600~1800 DEG C, the protective gas for being used is nitrogen or inert gas.
Technical solution of the present invention further improvement is that：After tubular electrode ingot is made in step A, tubular electrode ingot is added
Hot to 700~750 DEG C carry out isothermal annealing, and compound electroslag remelting system is then carried out to tubular electrode ingot and solid-state low-alloy rod iron
Electroslag ingot is combined into ESR.
Technical solution of the present invention further improvement is that：The heating-up temperature of the compound electroslag ingots of ESR is 1080 in step B
~1250 DEG C, soaking time is 30~40h.
Technical solution of the present invention further improvement is that：Temper needs to repeat three times, three times times in step D
The fiery common 80h of soaking time.
By adopting the above-described technical solution, the technological progress that the present invention is obtained is：
In the present invention in the chemical constituent of steel, Cr increased the quenching degree of steel, improve steel hardness and wearability and
Steel will not be made to become fragile；Mo improves the quenching degree and heat resistance of steel, prevents temper brittleness, keeps the hardness stabilization of steel, increased
Drag of the steel to deformation, cracking and abrasion etc..The content of the carbide formers such as Cr, Mo, V, W of the present invention is higher, formation
Larger Aliquation carbide Cr7C3Impart the excellent wearability of cold roll and roughness retaining capability high, the height of small and dispersed distribution
Hardness carbide Mo2C, VC, WC, impart cold roll matrix and obtain high rigidity at high temperature tempering and have high tissue steady
It is qualitative, it is ensured that high-speed steel roll has excellent wearability, a roughness retaining capability high, thus the cold roll need not be entered
Row chromium plating is just used directly for the rolling of high-grade sheet material, and in the course of work of roll, thermal shock resistance is substantially better than
Conventional roll, can make Heat Working Rolls more suitable for rolling high-strength degree wide plate band, and its surface quality is substantially better than common high-speed steel
Heat Working Rolls.
Using cold roll obtained in material of the present invention, the body of roll surface hardness of its roll is 86~96HSD, with excellent
Wearability, roughness retaining capability high and structure stability high.Applied on accident rate milling train higher, cold roll is comprehensively used
Performance can be significantly improved；Cold roll has excellent abrasion resistance properties, is applied on tandem mill after-frame and planisher, reduces plating
The processing step of chromium, greatly reduces production cost, also eliminates the environmental pollution that chromium plating is caused.
Using hot roll obtained in material of the present invention, the body of roll surface hardness of its roll is 80~86HSD, with excellent
Wearability, excellent oxide-film ability and structure stability high.Applied on rolling high-strength degree sheet mill, hot roll comprehensively makes
Can be significantly improved with performance；Hot rolled plate surface quality can also be significantly improved simultaneously.Realization is hot under certain conditions
Roll plate and replace cold-reduced sheet, reduce steel rolling process step, greatly reduce production cost, energy saving consumption.
Electroslag remelting complex method of the invention, is the rapid sequential solidification complex method of uniform orientation, is thoroughly avoided
Large-scale steel ingot center solidifying segregation, improves compound ingot quality, realizes that different use functions use different materials best fit.
Heat treatment method ensure that the performance of roll, its quenching, the temperature and time of tempering, roll is had optimal mechanical properties and is made
Use performance.
The shaping of tubular electrode, two kinds of different chemical constituent materials electroslag metallurgy complex methods produce compound steel ingot, most
The compound electroslag ingots of ESR being made eventually, body of roll outer layer is high alloy high speed steel material, and core and roll neck are low-alloy steel material.
Obtained forging Electroslag Cladding high-speed steel roll of the invention, body of roll surface hardness is 80~100HSD, and outer layer has
Excellent wearability, roughness retaining capability high and structure stability high etc., core and roll neck hardness are 30~45HSD, are had
Excellent toughness, tensile strength high.Production technology of the invention can save substantial amounts of alloy resource, meet cold rolling, hot rolling
Working roll rolling high-performance sheet material needs, and production cost is reduced, with application value higher.
Specific embodiment
The present invention is described in further details with reference to embodiment：
Embodiment 1
One kind forging Electroslag Cladding high-speed steel roll, the chemical constituent and its weight/mass percentage composition of outer layer in the cold roll
Design object is：C 0.9~1.0%, Si 0.4~0.6%, Mn 0.4~0.9%, Cr 5.0~8.0%, Mo 3.8~
4.0%, V 1.5~2.0%, W 0.90~2.00%, Ni 0.5~0.6%, P≤0.02%, S≤0.02%, remaining is Fe
With inevitable impurity.Core material is：C 0.8~1.00%, Si 0.40~0.80%, Mn 0.40~1.00%, Cr
2.00~6.00%, Mo 0.15~0.70%, V 0.05~0.20%, Ni≤0.80%, P≤0.02%, S≤0.02%.
The preparation method of the cold roll is comprised the following steps that：
A, refining tubular steel ingot：Required raw material is smelted in smelting furnace, smelting temperature is 1580~1680 DEG C, this
Embodiment is 1630 DEG C, and then molten steel is placed in refining furnace, starts to refine molten steel, and refining temperature is 1600~1800
DEG C, the present embodiment is 1650 DEG C, and molten steel is placed in ladle after the completion of refining, (such as nitrogen or inertia under the conditions of gas shield
Gases argon), carry out centrifugal casting into tubular electrode ingot.
By tubular electrode ingot be heated to 720 DEG C carry out isothermal annealing after, to tubular electrode ingot and solid-state low-alloy rod iron (or
Body of roll working lining using the forged steel working roll scrapped, as core constituents) carry out compound electroslag remelting and be made ESR compound electrics
Slag steel ingot, concretely comprises the following steps：By tubular electrode ingot and solid-state low-alloy rod, (or body of roll working lining has used the forged steel scrapped to work
Roller) it is immersed in the slag bath of junker mold, electric current is passed through, electric current is by electrode and tubular electrode ingot is fused into metal by heating
Liquid, molten metal after fusing reaches the bottom of junker mold, and gradually (or body of roll working lining is using scrapping with solid-state low-alloy rod
Forged steel working roll) be frozen into new compound steel ingot, again composite solidification into middle part top layer steel ingot be the ESR that finally gives
Compound electroslag ingot.
Chemical constituent analysis is carried out to the compound electroslag ingot outer layers of ESR, obtain the compound electroslag ingots of ESR chemical constituent and
Its weight/mass percentage composition is：C 0.95.%, Si 0.5%, Mn 0.4%, Cr 8.0%, Mo 4.0%, V 2.0%, W
1.5%, Ni 0.6%, P 0.02%, S 0.02%, remaining is Fe and inevitable impurity.Core chemical constituent and its matter
Measuring percentage composition is：C 0.82.%, Si 0.5%, Mn 0.4%, Cr 3.0%, Mo 0.5%, V 0.12%, Ni 0.4%,
P 0.02%, S 0.02%, remaining is Fe and inevitable impurity；
B, forging composite steel billet：After the compound electroslag ingots of ESR that step A is obtained carry out 1200 DEG C of heating, insulation 35h,
Come out of the stove, by being made roller stock after a series of deformation operations of die forging；
C, conditioning treatment：Conditioning treatment is carried out to roller stock, quenching after 1030 DEG C of insulation 20h is first heated to；Again
Air cooling after 820 DEG C of insulation 15h is heated to, temper is finally carried out, temperature is 650 DEG C, and tempering time is 80h；
D, machining and finished heat treatment：Roller stock size as requested is first carried out into mechanical roughing, by ultrasonic wave
After flaw detection is qualified, sensing air blast quenching is carried out to the body of roll top layer of roller stock using Induction Hardening Machine, hardening heat is
1100~1180 DEG C.
Temper is carried out to roller stock after the completion of quenching：Roller stock is heated to 460~560 DEG C, room is air cooled to after insulation 30h
Temperature.Temper after the completion of quenching needs to repeat three times, second, the temperature of third time be 460~560
DEG C, second, the tempering insulation time of third time be respectively 20h, 30h, three common 80h of tempering insulation time.
After the completion of tempering, roller stock is finished according to delivery gauge requirement, final desired cold roll is obtained.Afterwards
Ultrasound examination, hardness test, microstructure examination are carried out to cold roll.
The body of roll top layer Shore hardness for obtaining cold roll through last test is 90~96HSD, ultrasound examination and metallographic group
Knit and reach requirement.
Embodiment 2
Processing step is identical with the processing step in embodiment 1 in embodiment 2, and the difference with embodiment 1 is：
The chemical constituent of hot roll outer layer and its weight/mass percentage composition design object are in the present embodiment：
C 1.2~1.3%, Si 0.60~0.9%, Mn 0.40~0.9%, Cr 10.8~12.0%, Mo 3.8~
4.0%, V 2.8~3.0%, W 1.4~1.5%, Ni 0.4~0.6%, P≤0.015%, S≤0.015%, remaining is Fe
With inevitable impurity.The design object of core chemical constituent and its weight/mass percentage composition is：C 0.40~0.80%, Si
0.20~0.80%, Mn 0.20~1.00%, Cr 0.80~1.20%, Mo 0.15~0.60%, Ni≤0.80%, P≤
0.02%, S≤0.02%.
By carrying out chemical constituent analysis to Electroslag Cladding steel ingot, chemical constituent and its quality percentage in electroslag ingot outer layer
Content is：C 1.26%, Si 0.8%, Mn 0.61%, Cr 11.0%, Mo 3.9%, V 3.0%, W 1.2%, Ni
0.4%, P 0.014%, S 0.003%, remaining is Fe and inevitable impurity.Core chemical constituent and its quality percentage contain
Amount be：C 0.43.%, Si 0.46%, Mn 0.42%, Cr 0.8%, Mo 0.4%, Ni 0.6%, P 0.02%, S
0.02%, remaining is Fe and inevitable impurity.
After tubular electrode ingot is made in step A, by tubular electrode ingot be heated to 715 DEG C carry out isothermal annealing after, to tubular
Electrode ingot carries out compound electroslag remelting and is made the compound electroslag ingots of ESR with solid-state low-alloy rod iron.
After the compound electroslag ingots of ESR that will be obtained in step B carry out 1120 DEG C of heating, insulation 30h, come out of the stove, by die forging
Roller stock is made after a series of deformation operations；
Step C conditioning treatments：Conditioning treatment is carried out to roller stock, quenching after 1015 DEG C of insulation 18h is first heated to；
Air cooling after 810 DEG C of insulation 17h is again heated to, temper is finally carried out, temperature is 640 DEG C, and tempering time is 70h；
Hardening heat in step D is 1100 DEG C；Three temperatures are respectively 540 DEG C, 550 DEG C, 560 DEG C, three times and return
The fiery time is respectively 23h, 28h, 29h.
The body of roll top layer Shore hardness that hot roll is obtained after the completion of final production is 82~84HSD, ultrasound examination and gold
Phase constitution reaches requirement.
Embodiment 3
Processing step is identical with the processing step in embodiment 1 in embodiment 3, and the difference with embodiment 1 is：This implementation
The outer layer chemical constituent and its weight/mass percentage composition design object of cold roll are in example：
C 0.9~1.0%, Si 0.9~1.0%, Mn 0.40~0.50%, Cr 11.5~12.0%, Mo 3.8~
4.0%, V 3.8~4.0%, W 0.9~1.0%, Ni 0.35~0.45%, P≤0.01%, S≤0.01%, remaining is Fe
With inevitable impurity.The design object of core chemical constituent and its weight/mass percentage composition is：C 0.40~0.60%, Si
0.20~0.80%, Mn 0.20~0.80%, Cr 0.80~1.20%, Mo 0.15~0.60%, Ni≤0.80%, P≤
0.02%, S≤0.02%.
Chemical constituent analysis is carried out by compound electroslag ingot, chemical constituent and its quality percentage in electroslag ingot outer layer
Content is：C 0.96%, Si 1.0%, Mn 0.56%, Cr 12.0%, Mo 3.8%, V 4.0%, W 1.0%, Ni
0.4%, P 0.01%, S 0.009%, remaining is Fe and inevitable impurity.Core chemical constituent and its quality percentage contain
Measure and be：：C 0.45%, Si 0.570%, Mn 0.66%, Cr 0.90%, Mo 0.60%, Ni 0.70%, P 0.020%, S
0.012%.
After tubular electrode ingot is made in step A, by tubular electrode ingot be heated to 700 DEG C carry out isothermal annealing after, to tubular
Electrode ingot carries out compound electroslag remelting and is made the compound electroslag ingots of ESR with solid-state low-alloy rod iron.
After the compound electroslag ingots of ESR that will be obtained in step B carry out 1080 DEG C of heating, insulation 38h, come out of the stove, by die forging
Roller stock is made after a series of deformation operations；
Step C conditioning treatments：Conditioning treatment is carried out to roller stock, quenching after 1025 DEG C of insulation 22h is first heated to；
Air cooling after 830 DEG C of insulation 18h is again heated to, temper is finally carried out, temperature is 660 DEG C, and tempering time is 76h；
Hardening heat in step D is 1120 DEG C；Three times temperature is respectively 510 DEG C, 540 DEG C, 570 DEG C of three tempering
Time is respectively 25h, 30h, 25h.
The body of roll top layer Shore hardness that cold roll is obtained after the completion of final production is 90~93HSD, ultrasound examination and gold
Phase constitution reaches requirement.
Embodiment 4
Processing step is identical with the processing step in embodiment 1 in embodiment 4, and the difference with embodiment 1 is：This implementation
The outer layer chemical constituent and its weight/mass percentage composition design object of hot roll are in example：
C 1.1~1.2%, Si 0.8~1.2%, Mn 0.40~0.60%, Cr 8.5~9.5%, Mo 4.8~
5.0%, V 2.5~3.0%, W 1.3~1.4%, Ni 0.05~0.15%, P≤0.02%, S≤0.018%, remaining is Fe
With inevitable impurity.The design object of core and roll neck regiochemistry component and its weight/mass percentage composition is：C 0.40~
0.80%, Si 0.20~0.60%, Mn 0.20~0.60%, Cr 0.80~1.20%, Mo 0.15~0.60%, Ni≤
0.80%, P≤0.02%, S≤0.02%.
Chemical constituent analysis is carried out by compound electroslag ingot, chemical constituent and its quality percentage in electroslag ingot outer layer
Content is：C 1.2%, Si 1.0%, Mn 0.57%, Cr 9.1%, Mo 4.8%, V 2.8%, W 1.35%, Ni
0.1%, P 0.018%, S 0.015%, remaining is Fe and inevitable impurity.Core and roll neck regiochemistry component and its
Weight/mass percentage composition is：C 0.60%, Si 0.50%, Mn 0.60%, Cr 1.20%, Mo 0.35%, Ni 0.40%, P
0.018%, S 0.012%.
After tubular electrode ingot is made in step A, by tubular electrode ingot be heated to 740 DEG C carry out isothermal annealing after, to tubular
Electrode ingot carries out compound electroslag remelting and is made the compound electroslag ingots of ESR with solid-state low-alloy rod iron.
After the compound electroslag ingots of ESR that will be obtained in step B carry out 1200 DEG C of heating, insulation 38h, come out of the stove, by die forging
Roller stock is made after a series of deformation operations；
Step C conditioning treatments：Conditioning treatment is carried out to roller stock, quenching after 1040 DEG C of insulation 23h is first heated to；
Air cooling after 840 DEG C of insulation 19h is again heated to, temper is finally carried out, temperature is 670 DEG C, and tempering time is 90h；
Hardening heat in step D is 1100 DEG C；Temperature is respectively 560 DEG C, 570 DEG C, 580 DEG C, during three tempering
Between be respectively 23h, 28h, 29h.
The body of roll top layer Shore hardness that hot roll is obtained after the completion of final production is 82~85HSD, ultrasound examination and gold
Phase constitution reaches requirement.
Embodiment 5
Processing step is identical with the processing step in embodiment 1 in embodiment 5, and the difference with embodiment 1 is：This implementation
The outer layer chemical constituent and its weight/mass percentage composition of cold roll are in example：
C 1.0~1.1%, Si 0.2~0.3%, Mn 0.9~1.0%, Cr 8.5~9.0%, Mo 3.5~4.0%,
V 2.0~2.2%, W 1.2~1.5%, Ni 0.7~0.8%, P≤0.015%, S≤0.01%, remaining is Fe and can not keep away
The impurity exempted from.Core and roll neck regiochemistry component and its weight/mass percentage composition are：C 0.43%, Si 0.42%, Mn
0.6%, Cr 5.0%, Mo 0.5%, Ni 0.8%, P 0.013%, S 0.008%, remaining is Fe miscellaneous with inevitable
Matter.
After tubular electrode ingot is made in step A, by tubular electrode ingot be heated to 750 DEG C carry out isothermal annealing after, to tubular
Electrode ingot carries out compound electroslag remelting and is made the compound electroslag ingots of ESR with solid-state low-alloy rod iron.
After the compound electroslag ingots of ESR that will be obtained in step B carry out 1250 DEG C of heating, insulation 40h, come out of the stove, by die forging
Roller stock is made after a series of deformation operations；
Step C conditioning treatments：Conditioning treatment is carried out to roller stock, quenching after 1050 DEG C of insulation 25h is first heated to；
Air cooling after 850 DEG C of insulation 20h is again heated to, temper is finally carried out, temperature is 680 DEG C, and tempering time is 100h；
Hardening heat in step D is 1140 DEG C；Three temperatures are respectively 500 DEG C, 520 DEG C, 540 DEG C, three times and return
The fiery time is respectively 25h, 28h, 27h.
The body of roll top layer Shore hardness that cold roll is obtained after the completion of final production is 92~96HSD, ultrasound examination and gold
Phase constitution reaches requirement.
Compared with conventional cold roll, thermal shock resistance is good using the cold roll for being produced of the invention in the course of the work,
The service life extension of cold roll, without frequently changing cold roll again, accelerates manufacturing schedule.
Compared with conventional hot roll, thermal shock resistance is good using the hot roll for being produced of the invention in the course of the work,
The service life extension of hot roll, roll neck tensile strength can be realized more than more than 800MPa.
Claims (7)
- It is 1. a kind of to forge Electroslag Cladding high-speed steel roll, it is characterised in that：Chemical constituent and its quality percentage in body of roll outer layer Content is：C 0.70~1.50%, Si 0.20~1.20%, Mn 0.20~1.00%, Cr 4.00~12.00%, Mo 2.00~6.00%, V 1.00~4.00%, W 0.80~4.00%, Ni≤0.80%, P≤0.02%, S≤0.02%, its It is remaining for Fe and inevitable impurity；Core is that low-alloy steel or body of roll working lining use the forged steel working roll scrapped.
- It is 2. according to claim 1 to forge Electroslag Cladding high-speed steel roll, it is characterised in that：Chemical group in body of roll outer layer Divide and its weight/mass percentage composition is：C 0.90~1.30%, Si 0.40~1.00%, Mn 0.40~0.90%, Cr 8.00~ 12.00%, Mo 3.50~5.00%, V 1.50~3.00%, W 0.90~2.00%, Ni≤0.60%, P≤0.02%, S ≤ 0.02%, remaining is Fe and inevitable impurity.
- 3. it is a kind of forge Electroslag Cladding high-speed steel roll manufacture method, it is characterised in that comprise the following steps that：A, refining tubular electrode：Raw material is smelted in smelting furnace, then molten steel is placed in refining furnace, molten steel is carried out , be placed in molten steel in ladle after the completion of refining by refining, by molten steel under the effect of centrifuge power and under the conditions of gas shield Tubular electrode ingot is cast, the compound electroslag ingots of ESR is made using electroslag remelting complex method afterwards；B, forging composite steel billet：By the compound electroslag ingots of ESR obtained in step A by heating, insulation, die forging into roller stock；C, conditioning treatment：Conditioning treatment is carried out to roller stock, 1000~1050 DEG C of insulation 18~25h after-blow is first heated to air-cooled But；Air cooling after 800~850 DEG C of 15~20h of insulation is again heated to, temper is finally carried out, temperature is 630~680 DEG C, Tempering time is 70~100h；D, machining and finished heat treatment：Roller stock is carried out into roughing, through ultrasonic examination inspection it is qualified after, to the roller of roller stock Body top layer carries out continuous induction hardening, and hardening heat is 1100~1210 DEG C, and roller stock is carried out into temper, temperature afterwards It is 460~580 DEG C, room temperature is air cooled to after 20~30h of insulation；After the completion of tempering, roller stock is finished by required size, is made roll, carry out ultrasound examination, hardness test and Microstructure examination.
- 4. it is according to claim 3 forging Electroslag Cladding high-speed steel roll manufacture method, it is characterised in that：In step A Smelting temperature is 1580~1680 DEG C, and refining temperature is 1600~1800 DEG C, and the protective gas for being used is nitrogen or indifferent gas Body.
- 5. it is according to claim 3 forging Electroslag Cladding high-speed steel roll manufacture method, it is characterised in that：In step A After being made tubular electrode ingot, tubular electrode ingot is heated into 700~750 DEG C carries out isothermal annealing, then to tubular electrode ingot with Solid-state low-alloy rod iron carries out compound electroslag remelting and is made the compound electroslag ingots of ESR.
- 6. it is according to claim 3 forging Electroslag Cladding high-speed steel roll manufacture method, it is characterised in that：In step B The heating-up temperature of the compound electroslag ingots of ESR is 1080~1250 DEG C, and soaking time is 30~40h.
- 7. it is according to claim 3 forging Electroslag Cladding high-speed steel roll manufacture method, it is characterised in that：In step D Temper needs to repeat three times, three common 80h of tempering insulation time.
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| CN108060353A (en) * | 2017-12-19 | 2018-05-22 | 安徽天重工股份有限公司 | A kind of shield engine disk type hobbing cutter ring alloy |
| CN109594018A (en) * | 2018-12-26 | 2019-04-09 | 中钢集团邢台机械轧辊有限公司 | A kind of centrifugal casting quick-cutting steel pinch roller and its manufacturing method |
| CN110373605A (en) * | 2019-06-20 | 2019-10-25 | 浙江精瑞工模具有限公司 | A kind of novel high-toughness alloy steel and its method of smelting |
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| CN115074625A (en) * | 2022-06-23 | 2022-09-20 | 宝钢轧辊科技有限责任公司 | Intermediate roll of sendzimir mill and its manufacturing method |
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