CN104438418B - Rolling method of stainless steel mold cast steel ingot by one-heating forming - Google Patents
Rolling method of stainless steel mold cast steel ingot by one-heating forming Download PDFInfo
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- CN104438418B CN104438418B CN201410507697.1A CN201410507697A CN104438418B CN 104438418 B CN104438418 B CN 104438418B CN 201410507697 A CN201410507697 A CN 201410507697A CN 104438418 B CN104438418 B CN 104438418B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 title claims abstract description 20
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 16
- 239000010935 stainless steel Substances 0.000 title claims abstract description 16
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
- 239000010959 steel Substances 0.000 claims abstract description 78
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 239000011651 chromium Substances 0.000 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 239000011733 molybdenum Substances 0.000 claims abstract description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052796 boron Inorganic materials 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000010891 electric arc Methods 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 239000011593 sulfur Substances 0.000 claims abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000011574 phosphorus Substances 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 239000010949 copper Substances 0.000 claims abstract description 3
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 15
- 238000003801 milling Methods 0.000 claims description 12
- 230000003068 static effect Effects 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- 241001062472 Stokellia anisodon Species 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 14
- 238000005260 corrosion Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 238000009749 continuous casting Methods 0.000 description 12
- 229910001566 austenite Inorganic materials 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010436 fluorite Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/04—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing in a continuous process
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
-
- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B2001/022—Blooms or billets
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a rolling method of a stainless steel mold cast steel ingot by one-heating forming. The rolling method comprises the following steps: firstly, determining chemical element components of stainless steel according to weight percent: 0.01%-0.40% of carbon, 0.20%-0.60% of silicon, 0.20%-2.00% of manganese, 0.10%-14.00% of nickel, 10.50%-23.00% of chromium, 0.00%-3.50% of molybdenum, 0.00%-0.50% of copper, 0.00%-0.45% of sulfur, 0.00%-0.45% of phosphorus, 0.0200%-0.2000% of nitrogen, 0.0001%-0.0010% of boron, and the balance of Fe and inevitable impurities, and then performing two-step technological flow: firstly, EAF primary smelting by an electric arc furnace, AOD refining, (LF refining, VD air exhaust) and mold casting; and secondly, steel ingot heating until rolling with the specification of a finished product.
Description
Technical field
The present invention relates to a kind of milling method of stainless steel mold caststeel ingot one-heating forming, refer in particular to Stainless pipe billet with greatly
Specification, the composition design of corrosion resisting steel round steel and its manufacture method.
Background technology
Rustless steel is the steel of the dielectric corrosion such as resistance to gas, water, acid, alkali, salt with chromium (cr >=10.5%) as essential element
Kind.By structure of steel classification, rustless steel mainly has: austenitic stainless steel, voxel volume rustless steel, two phase stainless steel, martensite are stainless
Steel and precipitation-hardening stainless steel.
Pipe is the steel billet of processing steel pipe, mainly has carbon steel, low-alloy steel, rustless steel, high temperature alloy, abros
Deng, existing Stainless pipe billet smelting process mainly have continuous casting to smelt, molding is smelted, sensing is smelted and electroslag smelting, then
The processing in road mainly has: rolling and static ingot breaking down or hammer cogging after continuous casting billet Direct Rolling, static ingot breaking down cogging
Forging afterwards.
At present, China's Stainless pipe billet more adopt continuous casting billet Direct Rolling, typical steel grade be 304,304l, 304h,
316th, 316l etc., the advantage that this method produces is process is simple, production efficiency is high, lumber recovery is higher, manufacturing cost is more low
Deng, but its by continuous casting billet specification and rear road rolling deformation is little is limited, cause its trimmed size (general diameter≤110mm) and pressure
Contracting less than (Normal squeezing ratio≤4) it is impossible to meet big specification (such as diameter > 110mm) and high-quality steel pipe (such as boiler with
High temperature pressure vessel etc.) requirement.
China Patent No. cn201110442974.1 disclose a kind of with high-carbon steel, high carbon martensite rustless steel, spring steel,
The steel alloy such as bearing steel or high-speed steel, as steel core, using ordinary steel, martensitic stain less steel or austenitic stainless steel as body, is adopted
It is combined steel ingot with casting process, then pass through finishing, hot rolling one-heating forming.Chinese patent cn200810034230.4 discloses one kind
To the heating of low magnetic potassium steel continuous casting billet, de-scaling；Continuous casting billet is carried out hot rolling, becomes low magnetic high manganese steel sheet.
But prior art all fails to disclose how to use stainless steel mold caststeel ingot, design one-heating forming big specification corrosion resisting steel
The composition of round steel and concrete production technology.The present inventor is intended in substantial amounts of production practices, by substantial amounts of experiment, draws optimization
Formula and parameter, thus providing a kind of big specification (diameter > 110mm), economical (inexpensive), (low power reaches 1 to high-quality
Group, various indexs are excellent) Stainless pipe billet rolling by one time heatin technology, meet the needs of stainless-steel pipe production.
Content of the invention
The technical problem being existed based on background technology, the present invention is directed to continuous casting rolling pipe during current Stainless pipe billet produces
Specification is less and the shortcoming of static ingot many fire time rolling, there is provided the rolling of a kind of new stainless steel mold caststeel ingot one-heating forming
The method making big specification Stainless pipe billet.
The purpose of the present invention is: solves the many fire time rolling of stainless steel mold caststeel ingot on the basis of not increasing smelting cost
Problem；Purpose is to reduce heating fire, improve production efficiency and production capacity, is especially the reduction of steel ingot cogging and heats thus reducing
Energy resource consumption and scaling loss, reduce further manufacturing cost.The present invention is especially effective for Stainless pipe billet and axle class component, greatly
Improve production efficiency greatly, reduce energy consumption and waste gas discharge.
Additionally, in substantial amounts of production practices, by substantial amounts of experiment, drawing formula and the parameter of optimization, comprising: according to
Conventional arc melting, refinery practice and given alloying element ratio, produce steel ingot using die casting process；Through specifically just
Roll cogging and hot continuous rolling process is directly become a useful person.
Thus producing the Stainless pipe billet obtaining on the basis of aforementioned advantages, even more surprisingly obtain very high-quality
The finished product of amount, its various index is excellent, and low power even more reaches 1 group, that is out the expection of those skilled in the art.
The present invention develops a kind of steel ingot rolling by one time heatin rustless steel round steel it is characterised in that the chemical element component of steel
(weight %) is: carbon: 0.01～0.40, silicon: and 0.20～0.60, manganese: 0.20～2.00, nickel: 0.10～14.00, chromium: 10.50
～23.00, molybdenum: 0.00～3.50, copper: 0.00～0.50, sulfur: 0.00～0.45, phosphorus: 0.00～0.45, nitrogen: 0.0200～
0.2000, boron: 0.0001～0.0010, remaining is fe and inevitable impurity.
Composition design reason or principle:
Carbon: carbon is the element of stable austenite, carbon is solid with the elements such as cr, mn, mo formation carbide in rustless steel simultaneously
It is dissolved in strengthening collective in ferrite, so that the intensity of steel and hardness is greatly improved, but c is too high then unfavorable to toughness and intercrystalline corrosion,
Therefore carbon is controlled to 0.01～0.40% can guarantee good toughness and corrosion resistance while obtaining high intensity.
Manganese: manganese is austenite stabilizer element, the decomposition of austenite of drawing up.Meanwhile, manganese can play deoxidizer and desulfurization
The effect of agent, can cleaning molten steel, but too high can promote coarse grains, additionally, improve steel decay resistance in terms of, the work of manganese
With little, therefore it is controlled to 0.20～2.00%.
Silicon: silicon is ferrite former, has bad impact to forming austenite, with silicon in austenitic stainless steel
The raising of content, delta ferrite level will increase, thus affecting the performance of steel.But silicon is solid-solution in ferrite and austenite, have bright
Aobvious invigoration effect.Meanwhile, the affinity of silicon and oxygen is only second to aluminum and titanium, and is better than manganese, chromium, vanadium, be good reducing agent and
Deoxidizer, can improve the consistency of steel, but silicon is too high will significantly reduce plasticity and the toughness of steel, therefore it is controlled to 0.20～
0.60% can ensure that good toughness and intergranular corrosion resistance performance.
Chromium: chromium is carbide former, promotes being passivated and promoting steel to keep stablizing the result of passive state of steel.Meanwhile,
Chromium is strongly to form and stablize ferritic element again, is dissolved in austenite and strengthens collective and do not reduce toughness, reduces austenite
Area, postpones Cooling Austenite Transformation.So that the intensity of steel and hardness is significantly improved, be beneficial to anti intercrystalline corrosion and oxidation resistance
's.In addition chromium energy crystal grain thinning, improves quenched firm temper resistance, and therefore, steel of the present invention design chromium content is 10.50～
23.00%.
Nickel: be the element forming simultaneously stable austenite, improve the tissue of high chrome, make stainless decay resistance and work
Skill performance obtains to be improved, and makes steel have good intensity and the cooperation of plasticity, toughness.But nickel is the main of impact rustless steel cost
Alloying element, therefore controls nickel content to be 0.10～14.00%.
Boron: boron and oxygen, nitrogen have very strong affinity, and also can generate hardness with some metal compounds with sulfur, carbon compound
Larger boride.Trace B addition can improve austenitic stainless steel thermoplasticity and resistance to Sensitized Intergranular Corrosion performance, but works as boron
In steel, when content exceedes a certain amount of, form the boride of low melting point, reduce hot-working character and the plasticity of steel, therefore control boron
Content is 0.0001～0.0010%.
Molybdenum: molybdenum is to form ferritic element, and molybdenum can improve the mechanical behavior under high temperature of austenitic stainless steel, in rustless steel
Precipitation phase can also be formed, improve the intensity of steel.Additionally, the addition of molybdenum can promote stainless steel surfaces passivation and can effectively intend
The spot corrosion that hydrogen manufacturing atom is formed in metal surface, has the ability strengthening rustless steel pitting corrosion and crevice corrosion, therefore, controls
Molybdenum content is 0.10～0.60%.
Nitrogen: be the important element in rustless steel, be a kind of stainless hardness of steel of raising, corrosion resistance and stabilization of austenite
Effective element, except can replace part of nickel to save the intensity that also can improve steel in addition to valuable nickel element and decay resistance.Therefore
Consider, steel of the present invention adds 0.02～0.20% from strong plasticity and cold and hot working performance, fatigue behaviour and high-temperature corrosion resistance performance
Nitrogen be most suitable content.
Meanwhile, sulfur, phosphorus, lead, antimony, bismuth should reduce its content, to reduce former Austria in the case of technical conditions permission as far as possible
The segregation of family name's body grain boundaries, improves toughness.It is dissolved between the carbon in austenite and each element and reach preferable optimum proportioning
Content, so that material has the combination properties such as good plasticity, toughness, corrosion resistance.
Technical scheme is as follows:
The milling method of above-mentioned stainless steel mold caststeel ingot one-heating forming, using two-step process flow process:
The first step: refining → aod refine at the beginning of electric arc furnace eaf → (lf refine → vd pumping →) molding；Second step: Heating Steel Ingots
→ Direct Rolling is to trimmed size.
The first step, refining → aod refine at the beginning of electric arc furnace → (lf refine → vd pumping →) molding
Carry out refining at the beginning of molten steel in 20～60 tons of electric arc furnace；The argon oxygen decarburizing furnace refine of corresponding tonnage；Molding cast；Raw
Produce the qualified molding side ingot of 12 cun, 17 cun or 20 cun；Cold ingot finishing or heat send rolling.
Can carry out after the described steel ingot demoulding cold ingot peeling finishing or directly heat send heater for rolling steel.
Second step, 750 milling train breaking down cogging+650 milling train hot continuous rolling is to finished product
Static ingot is cold to be sent or heat is delivered to milling train and rolled, by ingot shape size cogging different with trimmed size to 220 sides,
Base in the middle of 180 sides and 160 sides, hot continuous rolling is to trimmed size.
Described Heating Steel Ingots technique: 1200 ± 20 DEG C of soaking, the heating and thermal insulation time is not less than 4 hours, and start rolling temperature is not low
In 1050 DEG C；
Described rolling mill practice: cogging finishing temperature is not less than 1000 DEG C, blooming pass is not more than 35 passages, front 20 passage pressures
Lower amount (δ h) controls in 25～60mm；Enter hot continuous rolling temperature and be not less than 950 DEG C；
The type of cooling: cold bed slow cooling collecting after scale sawing.
Direct hot continuous rolling is not landed, its rolling mill practice is the technology of original creation, using heavy reduction control after steel ingot breaking down cogging
Passage processed and the rolling of cogging finishing temperature technique, are effectively guaranteed tissue, performance and the surface quality of steel, it is to avoid table
Planar defect and the bad generation of low power.
In sum, a kind of milling method of stainless steel mold caststeel ingot one-heating forming is it is characterised in that according to conventional electric arc
Stove melting, refinery practice and the alloying element ratio to top, produce steel ingot using die casting process；Through breaking down cogging and hot continuous rolling
Directly become a useful person.
The invention has benefit that:
1st, quality is good.Due to rolling using static ingot, it has been effectively kept the advantage molding as-cast structure, along with big
Drafts, compression ratio is larger, dense structure, better than conventional continuous casting and rolling pipe macrostructure.
2nd, trimmed size is big.Due to being rolled using static ingot, steel ingot area of section is big, little in larger compression ratio condition
The specification that can become a useful person is larger, typically up to more than φ 200mm.
3rd, production efficiency is high.Although also contains molding breaking down cogging operation, followed by hot continuous rolling is become a useful person, than routine
Forging or roll that one reconditioning has been lacked in the technological process become a useful person and bloom heats again after breaking down cogging, flow process shortens, and produces effect
Rate improves.
4th, low cost.Forging or roll the technological process become a useful person and compare after conventional breaking down cogging, repaiies together due to decreasing
Mill and bloom heat again, meanwhile, decrease the excision just pricked end to end, lumber recovery is also greatly improved, and reduces production cost.
5th, less energy consumption.Cause decreases one reconditioning and bloom heats again, it is possible to reduce energy resource consumption, reduces waste gas row
Put.
Brief description
Accompanying drawing 1 is the process flow diagram of the present invention.
Accompanying drawing 2 is the tissue contrast of the present invention and continuous casting rolling and molding rolling rustless steel round steel.It can be seen that, with conventional continuous casting
Rolling rustless steel is compared, and the tissue die break of the rustless steel round steel that the present invention obtains is more abundant, and tissue is comparatively dense.
Specific embodiment
Embodiment 1-3
Embodiment 1-3 adopts different rustless steel formula, and different is embodied as technological parameter, according to as follows same two
Footwork technological process produces:
The first step: smelt
Electric furnace returns steel melting, and tapping temperature is not less than 1580 DEG C, tap 25.0～25.8t, and in ladle, the quantity of slag controls
Within 150kg.Molten steel composition requires: c:0.8～1.2%, si:0.6～0.9%, cr:11～12%, and p :≤0.040%,
Ni :≤0.55%.
Thermometric sampling after steel, oxygen decarburization are converted in aod refine.Add Calx 800kg, magnesia 50kg, blow gas oxygen: nitrogen
Gas=1600:200.Add alloy when temperature >=1680 DEG C.After adding alloy, add Calx 1000～1200kg, blow gas
Body is oxygen: nitrogen=1:1.When oxygen decarburization is to 0.20～0.30%, thermometric samples, and adds Calx 1000～1200kg.Eventually
Point carbon controls >=0.08%, and reduction period deoxidizer ratio controls si:al=6:4, Calx 300～500kg, and fluorite 200～
300kg.Alloy is allocated into internal control desired value after reduction.Draw double slag process operation after slag, add Calx 150～300kg, fluorite 200
～300kg.Tapping adds reducing agent with steel stream.
Open pour temperature add 60 for liquidus temperature～80 DEG C.Molding 12 cun～20 cun steel ingots of casting.
Second step: rolling
Heating technique: heating technique takes 800 DEG C to enter stove insulation, is warming up to 1200 DEG C with the speed being not more than 100 DEG C/h
It is incubated 4 hours afterwards.
Rolling mill practice: start rolling temperature is not less than 1050 DEG C；Cogging finishing temperature is not less than 1000 DEG C, and blooming pass is not more than
35 passages, front 20 reductions in pass (δ h) control in 25～60mm；Enter hot continuous rolling temperature and be not less than 950 DEG C.Cold after scale sawing
Bed slow cooling is simultaneously collected.
As rolling steel grade needs to be annealed for martensitic structure, by the execution of Related Annealing technological requirement.
Table 1 is that the concrete one-tenth of rustless steel of embodiment 1-3 is grouped into.
The concrete composition of rustless steel of table 1 embodiment 1-3
Table 2 is the specific implementation process technological parameter of embodiment 1-3.
The specific implementation process technological parameter of table 2 embodiment 1-3
Table 3 is produced, for embodiment 1-3, the Stainless pipe billet obtaining and is rolled with conventional continuous casting hot-rolling method and conventional molding two fire
The Stainless pipe billet low power grading contrast that method processed produces.
The Stainless pipe billet low power grading contrast that table 3 present invention is produced with conventional method
| Low power is graded | Pattern segregation | General Loosen | Middle loose |
| Conventional continuously cast billet for pipe-making | 2.0 | 3.0 | 2.0 |
| Conventional molding pipe | 2.0 | 2.0 | 2.0 |
| Embodiment 1 | 1.0 | 1.0 | 1.0 |
| Embodiment 2 | 1.0 | 2.0 | 1.0 |
| Embodiment 3 | 1.0 | 2.0 | 2.0 |
This detection data is just for above-mentioned detection sample.
Can see from experimental data, the Stainless pipe billet that the technique productions of the present invention obtain, macrostructure grading is substantially
Preferably, total quality exceeds expection.
Table 4 is produced, for embodiment 1-3, the Stainless pipe billet obtaining and is rolled with conventional continuous casting hot-rolling method and conventional molding two fire
Stainless pipe billet finished product rate and integrated cost contrast that method processed produces.
Stainless pipe billet finished product rate and integrated cost contrast that table 4 present invention is produced with conventional method
This detection data is just for above-mentioned detection sample.
Can see from data above, the Stainless pipe billet that present invention process production obtains, rate of comprehensively becoming a useful person is than conventional mould
Cast tube base improves more than 10%；Integrated cost reduces more than 800 yuan/ton than conventional molding pipe.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (2)
1. a kind of milling method of stainless steel mold caststeel ingot one-heating forming is it is characterised in that its step is as follows:
(1) determine stainless chemical element component, according to percentage by weight be: carbon: 0.01～0.40, silicon: 0.20～0.60,
Manganese: 0.20～2.00, nickel: 0.10～14.00, chromium: 10.50～23.00, molybdenum: 0.00～3.50, copper: 0.00～0.50, sulfur:
0.00～0.45, phosphorus: 0.00～0.45, nitrogen: 0.0200～0.2000, boron: 0.0001～0.0010, remaining is fe and can not keep away
Exempt from impurity；
(2) smelt: carry out refining at the beginning of molten steel in 20～60 tons of electric arc furnace；The argon oxygen decarburizing furnace refine of corresponding tonnage；Molding is poured
Note；Produce the qualified molding side ingot of 12 cun, 17 cun or 20 cun；Cold ingot finishing or steel ingot heat send rolling；
Carry out after the described steel ingot demoulding steel ingot peeling finishing or directly heat send heater for rolling steel；
(3) roll: 750 milling train breaking down cogging+650 milling train hot continuous rolling is to finished product
Static ingot is cold to be sent or heat is delivered to milling train and rolled, by ingot shape size cogging different with trimmed size to 160 sides, 180
Base in the middle of side, 220 sides, hot continuous rolling is to trimmed size；
In described hot continuous rolling, Heating Steel Ingots technique is: 1200 ± 20 DEG C of soaking, and the heating and thermal insulation time is not less than 4 hours, open rolling temperature
Degree is not less than 1050 DEG C；
Described rolling mill practice is: cogging finishing temperature is not less than 1000 DEG C, and blooming pass is not more than 35 passages, front 20 passage pressures
Amount δ h controls in 25～60mm；Enter hot continuous rolling temperature and be not less than 950 DEG C；
The type of cooling: cold bed slow cooling collecting after scale sawing.
2. the Stainless pipe billet that a kind of milling method production as claimed in claim 1 obtains.
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| CN105177264B (en) * | 2015-09-25 | 2018-06-12 | 宝钢特钢有限公司 | A kind of manufacturing method of stainless steel forging round steel |
| JP2017095794A (en) * | 2015-11-17 | 2017-06-01 | 株式会社神戸製鋼所 | Duplex stainless steel material and duplex stainless steel tube |
| CN106670230B (en) * | 2016-12-23 | 2018-06-19 | 江苏沙钢集团淮钢特钢股份有限公司 | Cogging, tandem rolling and the cold big specification rectangle steel production technology being combined of control |
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| CN109825769B (en) * | 2019-03-29 | 2021-02-26 | 宝钢特钢长材有限公司 | Molybdenum-containing stainless steel welding rod steel and preparation method thereof |
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| CN110421003A (en) * | 2019-07-19 | 2019-11-08 | 浙江青山钢铁有限公司 | A kind of stainless steel ESR ingot heating once and rolling is become a useful person method |
| CN110819913B (en) * | 2019-11-27 | 2020-12-04 | 攀钢集团江油长城特殊钢有限公司 | Chalcogenide free-cutting stainless steel and preparation method thereof |
| CN112226667B (en) * | 2020-09-30 | 2022-02-01 | 攀钢集团江油长城特殊钢有限公司 | Preparation method of chromium stainless pre-hard plastic die steel |
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| CN113564468B (en) * | 2021-07-15 | 2022-06-28 | 振石集团东方特钢有限公司 | Stainless steel for heating pipe of nickel-saving water heater and preparation process thereof |
| CN113546964B (en) * | 2021-07-26 | 2022-09-02 | 大冶特殊钢有限公司 | Rolling method for improving ultrasonic flaw detection qualification rate of large-size high-carbon chromium-molybdenum bearing steel |
| CN113584392B (en) * | 2021-08-03 | 2022-07-08 | 山西太钢不锈钢股份有限公司 | Casting method of free-cutting ferritic stainless steel |
| CN113843283A (en) * | 2021-09-28 | 2021-12-28 | 成都先进金属材料产业技术研究院股份有限公司 | Preparation method of large-size cold-work die steel billet |
| CN116287948A (en) * | 2022-11-18 | 2023-06-23 | 烟台华新不锈钢有限公司 | Preparation method of stainless steel for high-pressure boiler |
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| JPS62139813A (en) * | 1985-12-13 | 1987-06-23 | Sumitomo Metal Ind Ltd | Method for straight forward rolling of hot steel slab |
| CN102363869B (en) * | 2011-10-14 | 2013-06-19 | 攀钢集团江油长城特殊钢有限公司 | Manufacturing method of free-cutting ferritic stainless steel 430FM |
| CN103624091A (en) * | 2012-08-27 | 2014-03-12 | 江苏宏诚不锈钢制品有限公司 | Cold bed matrix cutting device for steel plates formed by one time heating |
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