CN102766745A - Heat treatment method for high-speed steel for rollers - Google Patents
Heat treatment method for high-speed steel for rollers Download PDFInfo
- Publication number
- CN102766745A CN102766745A CN2012102317356A CN201210231735A CN102766745A CN 102766745 A CN102766745 A CN 102766745A CN 2012102317356 A CN2012102317356 A CN 2012102317356A CN 201210231735 A CN201210231735 A CN 201210231735A CN 102766745 A CN102766745 A CN 102766745A
- Authority
- CN
- China
- Prior art keywords
- steel
- heated
- roll
- stove
- insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000010438 heat treatment Methods 0.000 title claims abstract description 11
- 229910000997 High-speed steel Inorganic materials 0.000 title abstract description 18
- 238000010791 quenching Methods 0.000 claims abstract description 25
- 230000000171 quenching effect Effects 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 77
- 239000010959 steel Substances 0.000 claims description 77
- 238000009413 insulation Methods 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 238000000137 annealing Methods 0.000 claims description 10
- 239000010955 niobium Substances 0.000 claims description 7
- 238000005275 alloying Methods 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 229910052684 Cerium Inorganic materials 0.000 claims description 5
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 5
- 229910000592 Ferroniobium Inorganic materials 0.000 claims description 5
- 229910001145 Ferrotungsten Inorganic materials 0.000 claims description 5
- 229910001060 Gray iron Inorganic materials 0.000 claims description 5
- 108010038629 Molybdoferredoxin Proteins 0.000 claims description 5
- 229910000805 Pig iron Inorganic materials 0.000 claims description 5
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 5
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- -1 ferrotianium Chemical compound 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 5
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 claims description 5
- ZFGFKQDDQUAJQP-UHFFFAOYSA-N iron niobium Chemical compound [Fe].[Fe].[Nb] ZFGFKQDDQUAJQP-UHFFFAOYSA-N 0.000 claims description 5
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000005496 tempering Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 230000003746 surface roughness Effects 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 10
- 229910052720 vanadium Inorganic materials 0.000 description 9
- 238000005204 segregation Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000009750 centrifugal casting Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a heat treatment method for high-speed steel for rollers. The chemical composition of the high-speed steel consists of the following components in percentage by weight: C: 3.2 to 3.6; W: 1.2 to 1.6; Mo: 5.0 to 7.0; V: 2.0 to 3.0; Cr: 8.0 to 10.0; Al: 0.1 to 0.4; Ni: 2.2 to 2.6; Co: 6.5 to 7.5; Nb: 0.2 to 0.4; Ti: 0.2 to 0.4; Ce: 0.4 to 0.6; Zr: 0.05 to 0.20; Si: less than 0.8; Mn: less than 1.5; S: less than 0.03; P: less than 0.04; and the balance of Fe. After the high-speed steel is cast to form a billet and the billet is roughly machined, the billet is quenched, the quenching process is carried out when a furnace is heated to 1260 DEG C to 1280 DEG C, the temperature is kept for 3 to 5 hours, the billet is then quenched in oil, and is tempered after being quenched, the tempering process is carried out when the furnace is heated to 620 DEG C to 650 DEG C, the temperature is kept for 5 to 7 hours, the furnace is cooled and then heated to 610 DEG C to 630 DEG C again, the temperature is kept for 5 to 7 hours, and after air cooling and tempering, finish machining is carried out, so that a roller, the dimensional precision and surface roughness of which come up to requirements, is obtained.
Description
Technical field
The present invention relates to the ferrous metallurgy field, particularly a kind of heat treating method of rapid steel.
Background technology
Roll is one of main consumption spare part during steel rolling is produced, and roll consumption is about 5%～15% of steel rolling production cost.Shut down, fall factors such as product and maintenance of the equipment increase if consider the production that brings because of roll consumption, then the proportion of its shared production cost can be higher.Roll quality not only is related to steel rolling production cost and milling train production operational availability, also influences mill bar quality to a great extent.Along with the development of steel rolling technology, rolling mill speed and level of automation improve constantly, and breaker roll quality particularly wear resistance, intensity and the toughness etc. of roll is had higher requirement.In recent years, because to the specific demand of rolling stock, the performance of the size of stocking, surface accuracy, stocking is all had higher requirement.In addition, along with the development of rolling technique, the Working environment of roll is also more and more harsher, is example with the hot continuous rolling, and roll is under high temperature, high loading, the high-speed mal-condition for a long time, and the performance requriements of breaker roll is higher.How improving roller performance to adapt to the needs of milling train, is the new problem that roll development person faces.
In common rapid steel, increase carbon content and content of vanadium, can increase the quantity of high firmness MC type carbide, improve the wear resistance of rapid steel.Replacing rich chromium cast iron, infinitely chilled ductile cast iron and casting half steel to make roll with high-carbon high-high-vanadium high-speed steel at present is one of main developing direction.Chinese invention patent CN1631565 discloses a kind of High Vanadium Rapid Steel Composite Roll And Production Technology; Roll is divided into roller core and roll wearing layer; Roller core adopts toughness low alloy steel or mild steel material making preferably; The roll wearing layer adopts the high-vanadium high-speed steel material, and the principal element content of this high-vanadium high-speed steel is: C:1.8～3.5%, V:7～12%, Cr:4～5%, Mo:2～4%, Ni:0.5～1.5%, surplus are iron.Its production technique is: roller core and roll wearing layer are one through the compound founding of induction heating consecutive solidification crystallization method.The invention roll vanadium content is too high, prone to low hardness M
3 C type carbides, reduce the wear resistance of high speed steel (good and Miyasaka, Yoshihiro Kataoka, soup Koji Nakata high carbon steel Full speed carbide formation and ぼ す van ni inner zip ウ impact of Rousseau added, casting Engineering, 1997,69 (3): 201 ~ 206).Chinese invention patent CN1807671 discloses a kind of continuous composite high speed steel roll formula, and roller core adopts the alloy forged steel material of H.T., and the rapid steel composition that the outer body of roll adopts is (weight %): 1.5～3.5C; 2.0～7.0Cr, 2.0～7.0Mo, 4.0～10.0V; 4.0～10.0W; 0～10.0Co, < 2.0, surplus is Fe to Ni.Adopt this prescription can develop the composite high-speed steel roller that W, V content are high, segregation is light, wear resistance is good, can satisfy the hot continuous rolling technology requirement.This material high-speed steel roll can only adopt continuous recombining process to be shaped, and equipment complicacy and production efficiency are low, and when adopting centre spinning method to be shaped, element segregation is serious, reduces the roll wear resistance.Chinese invention patent CN1803325 discloses a kind of compound high speed steel roll and preparation method thereof, and the cladding material that it is characterized in that this composite roll is a rapid steel, and the core of the roll material is a graphitized steel, and the chemical ingredients of skin of the roll high speed steel material (weight %) is: 1.2～2.5C; 0.3～1.5Si, 0.4～1.0Mn, 3.0～8.0Cr, 2.0～7.0Mo; 2.0～7.0V, 1.0～5.0W, 0.01～0.5RE; < 0.05, < 0.05, surplus is Fe to S to P.The chemical ingredients (weight %) of core of the roll graphitized steel material is: 1.2～2.0C, 1.5～2.5Si, 0.3～1.0Mn; 0.5～1.5Ni, < 0.2, Mo < 0.2 for Cr; P 0.05, S < 0.05,0.01～0.2RE; 0.05～0.5Ca, surplus is Fe, and outer high speed steel material of composite roll and core graphitized steel material are metallurgical binding.Its method of manufacture is after adopting centrifugal casting technique with two kinds of metallic substance cast moldings; Again composite roll is carried out roughing and quenching heat treatment; Adopt this method to make roll; It is high to have core of the roll intensity, anti-accident ability strong with improve characteristics such as online work-ing life of roll and the rate of manufacturing a finished product significantly improve.But it is thick that this roller body is organized, and partially carbonized thing is continuous net-shaped distribution, and the roll thermal fatigue resistance is poor, is prone to be full of cracks during roll uses and peels off, and influences the normal use of roll.Chinese invention patent CN1339342 discloses a kind of method of manufacture of high speed steel roll ring; Its main points are to make the quick-cutting steel electrode hollow billet earlier; Be placed on then in the roller shell esr equipment with Quench mold and carry out esr, process blank, heat-treat again and machining.Its advantage is: roll sleeve crystal grain is tiny, homogeneous microstructure, and inclusion is few; There are not defectives such as shrinkage cavity, loose, element segregation; Performances such as wear resistance, obdurability are improved, increase the service life, can overcome the weak point that present centrifugal casting and CPC method etc. are made roll or roller shell; Further improve wear resistance and obdurability, can be used for making roller shell and rolls such as pipe-mill, high-speed rod pre-finishing mill, arrowband finishing mill and small section mill.There are deficiencies such as complex process, energy consumption height and efficient are low in this method.
Summary of the invention
To the deficiency of prior art, one of the object of the invention is to provide the heat treating method of a kind of roll with rapid steel, and this rapid steel hardness, intensity and toughness are high, and red hardness and wear resistance are good.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of roll is with the heat treating method of rapid steel, and the chemical constitution of said rapid steel is made up of following component by weight percentage: C:3.2-3.6, W:1.2-1.6, Mo:5.0-7.0; V:2.0-3.0, Cr:8.0-10.0, Al:0.1-0.4, Ni:2.2-2.6; Co:6.5-7.5, Nb:0.2-0.4, Ti:0.2-0.4, Ce:0.4-0.6; Zr:0.05-0.20, Si＜0.8, Mn＜1.5, S＜0.03; P＜0.04, all the other are Fe, the step of preparation process of this rapid steel is: 1. ordinary scrap steel, the pig iron, ferrotungsten, molybdenum-iron, vanadium iron, ferrochrome, ferro-niobium, ferrotianium, nickel plate and cobalt metal are mixed by the mentioned component requirement and put into the electric furnace heat fused; 2. the stokehold is adjusted to branch and temperature is risen to 1580 ℃-1630 ℃ after qualified, adds the Al deoxidation and the alloying that account for molten steel weight 0.3%-0.8%, then comes out of the stove; Alterant, cerium base magnesium-rare earth are crushed to the fritter of granularity less than 15mm, after oven dry below 200 ℃, place the casting ladle bottom, with the method that pours in the bag molten steel is carried out composite inoculating and handle; 3. adopt gray iron or magnesium iron casting mold, be preheated to 230-240 ℃ after at internal surface brushing refractory paint, thickness is 0.8-1.2mm, is installed on after the mould drying on the whizzer, is preheated to 270-300 ℃ of waiting for pouring; The adjustment liquid steel temperature is 1510-1550 ℃, starts whizzer, and making its rotating speed is 800rpm-1000rpm; With pouring molten steel in casting mold; Pouring molten steel finishes behind the 20min-30min, closes whizzer, from casting mold, takes out strand and handles directly into furnace annealing; Annealing treating process is: strand is not less than 200 ℃ heat treatment furnace with temperature and is heated to 700 ℃-750 ℃ insulation 1h-2h; Continue to be heated to 1030 ℃-1050 ℃ insulation 4h-8h then, stove is cold to get final product, and then strand is carried out roughing;
Described heat treating method does, carries out quench treatment after the roughing, and quenching processing technology is to be heated to 1260 ℃-1280 ℃ with stove, insulation 3h-5h; Oil quenching carries out temper after the quenching then, and temper technology is to be heated to 620 ℃-650 ℃ with stove, insulation 5h-7h; Stove is cold, and then is heated to 610 ℃-630 ℃, insulation 5h-7h; Air cooling carries out precision work after the temper, obtain the satisfactory roll of dimensional precision and surface smoothness.
The present invention compared with prior art has following beneficial effect:
1. the present invention has at first optimized the composition design of rapid steel, and wherein C is the fundamental element that forms wear-resisting phase carbide, and C content is low to cause carbide quantity few, therefore improves carbon content to 3.2-3.6%, is higher than 3.6% and will causes fragility to increase.W in rapid steel mainly with Fe
4W
2The C form exists, when quenching heating, and a part of Fe
4W
2C dissolves in austenite, is present in the martensite after the quenching.W content increases, and can improve the rapid steel red hardness and reduce hot supersensitivity, but the too high ununiformity that can increase carbide of W content increases the fragility of steel, so W content is controlled at 1.2-1.6%.Mo is close to the influence and the W of rapid steel, and it is the principal element that promotes secondary hardening equally.V except cleaning molten steel, reduces outside inclusion and the gas content in rapid steel, mainly forms the MC type carbide of high firmness; The MC dissolving is very difficult during high temperature austenite; Increase V content in the rapid steel, can obviously improve wear resistance, but contain the V too high levels; Owing to be prone to be full of cracks along crystal boundary, so V content is controlled at 2.0-3.0%.Cr part in rapid steel is present in M
6In the C type carbide, also can form M
23C
6The type carbide also has about 40% to be present in the matrix.The Cr too high levels, the formation of the carbide that deposition was separated out when unnecessary Cr participated in tempering, this Cr of containing carbide is separated out when lesser temps easily, has reduced the thermostability of steel, therefore Cr content is controlled at 8.0-10.0%.Ni is a kind of non-carbide forming element, and its solid solution can improve the intensity and the thermal fatigue resistance of matrix in matrix, is favourable to freedom from cracking and the peel-ability that improves high-speed steel roll.Co:Co can improve Red Hardness of High Speed Steel, be very favorable to improving the high-speed steel roll high temperature abrasion resistance, but Co reduces rapid steel toughness, takes all factors into consideration Co content is controlled at 6.5-7.5%.Nb: contain alloying elements such as more W, Mo, Cr, V in the rapid steel, and the density difference of the carbide of these elements and formation thereof is very big, under centrifugal action, is prone to produce segregation, reduced the wear resistance of roll.Add Nb and can form the bigger MC type double carbide of density, it is poor to reduce carbide and fusant density, alleviates segregation, improves the roll wear resistance.The feasible performance that has guaranteed rapid steel from composition of such design.
2. making roll with the present invention only needs common equipments such as electric furnace, centrifugal casting machine, heat treatment furnace, and production technique is simple
3. the present invention has optimized thermal treatment process, makes that metallographic structure is main with the martensite of high firmness, also contains the high firmness eutectic carbides more than 15% after the thermal treatment, and roll hardness is high, and greater than 65HRC, wear resistance is good.
The roll that the present invention makes is organized tinyly, even, and intensity is high with toughness, and thermal fatigue resistance is good, can not occur during roll of the present invention uses chapping and peeling off, and also broken roller can not take place.
Below in conjunction with embodiment the present invention is done further explain.These embodiment only are preferred embodiments of the present invention, but the present invention is not limited to these embodiment.
Embodiment
Embodiment one
A kind of roll is with the heat treating method of rapid steel, and the chemical constitution of said rapid steel is made up of following component by weight percentage: C:3.2, W:1.6, Mo:5.0; V:3.0, Cr:8.0, Al:0.4, Ni:2.2; Co:7.5, Nb:0.2, Ti:0.4, Ce:0.4; Zr:0.20, Si＜0.8, Mn＜1.5, S＜0.03; P＜0.04, all the other are Fe, the step of preparation process of this rapid steel is: 1. ordinary scrap steel, the pig iron, ferrotungsten, molybdenum-iron, vanadium iron, ferrochrome, ferro-niobium, ferrotianium, nickel plate and cobalt metal are mixed by the mentioned component requirement and put into the electric furnace heat fused; 2. the stokehold is adjusted to branch and temperature is risen to 1580 ℃-1630 ℃ after qualified, adds the Al deoxidation and the alloying that account for molten steel weight 0.3%, then comes out of the stove; Alterant, cerium base magnesium-rare earth are crushed to the fritter of granularity less than 15mm, after oven dry below 200 ℃, place the casting ladle bottom, with the method that pours in the bag molten steel is carried out composite inoculating and handle; 3. adopt gray iron or magnesium iron casting mold, be preheated to 230 ℃ after at internal surface brushing refractory paint, thickness is 1.2mm, is installed on after the mould drying on the whizzer, is preheated to 270 ℃ of waiting for pouring; The adjustment liquid steel temperature is 1550 ℃, starts whizzer, and making its rotating speed is 800rpm; With pouring molten steel in casting mold; Pouring molten steel finishes behind the 30min, closes whizzer, from casting mold, takes out strand and handles directly into furnace annealing; Annealing treating process is: strand is not less than 200 ℃ heat treatment furnace with temperature and is heated to 700 ℃ of insulation 2h; Continue to be heated to 1030 ℃ of insulation 8h then, stove is cold to get final product, and then strand is carried out roughing;
Described heat treating method does, carries out quench treatment after the roughing, and quenching processing technology is to be heated to 1260 ℃ with stove, insulation 5h; Oil quenching carries out temper after the quenching then, and temper technology is to be heated to 620 ℃ with stove, insulation 7h; Stove is cold, and then is heated to 610 ℃, insulation 7h; Air cooling carries out precision work after the temper, obtain the satisfactory roll of dimensional precision and surface smoothness.
Embodiment two
A kind of roll is with the heat treating method of rapid steel, and the chemical constitution of said rapid steel is made up of following component by weight percentage: C:3.6, W:1.2, Mo:7.0; V:2.0, Cr:10.0, Al:0.1, Ni:2.6; Co:6.5, Nb:0.4, Ti:0.2, Ce:0.6; Zr:0.05, Si＜0.8, Mn＜1.5, S＜0.03; P＜0.04, all the other are Fe, the step of preparation process of this rapid steel is: 1. ordinary scrap steel, the pig iron, ferrotungsten, molybdenum-iron, vanadium iron, ferrochrome, ferro-niobium, ferrotianium, nickel plate and cobalt metal are mixed by the mentioned component requirement and put into the electric furnace heat fused; 2. the stokehold is adjusted to branch and temperature is risen to 1580 ℃-1630 ℃ after qualified, adds the Al deoxidation and the alloying that account for molten steel weight 0.8%, then comes out of the stove; Alterant, cerium base magnesium-rare earth are crushed to the fritter of granularity less than 15mm, after oven dry below 200 ℃, place the casting ladle bottom, with the method that pours in the bag molten steel is carried out composite inoculating and handle; 3. adopt gray iron or magnesium iron casting mold, be preheated to 240 ℃ after at internal surface brushing refractory paint, thickness is 0.8mm, is installed on after the mould drying on the whizzer, is preheated to 300 ℃ of waiting for pouring; The adjustment liquid steel temperature is 1510 ℃, starts whizzer, and making its rotating speed is 1000rpm; With pouring molten steel in casting mold; Pouring molten steel finishes behind the 20mi n, closes whizzer, from casting mold, takes out strand and handles directly into furnace annealing; Annealing treating process is: strand is not less than 200 ℃ heat treatment furnace with temperature and is heated to 750 ℃ of insulation 1h; Continue to be heated to 1050 ℃ of insulation 4h then, stove is cold to get final product, and then strand is carried out roughing;
Described heat treating method does, carries out quench treatment after the roughing, and quenching processing technology is to be heated to 1280 ℃ with stove, insulation 3h; Oil quenching carries out temper after the quenching then, and temper technology is to be heated to 650 ℃ with stove, insulation 5h; Stove is cold, and then is heated to 630 ℃, insulation 5h; Air cooling carries out precision work after the temper, obtain the satisfactory roll of dimensional precision and surface smoothness.
Embodiment three
A kind of roll is with the heat treating method of rapid steel, and the chemical constitution of said rapid steel is made up of following component by weight percentage: C:3.4, W:1.4, Mo:6.0; V:2.5, Cr:9.00, Al:0.25, Ni:2.4; Co:7.0, Nb:0.3, Ti:0.3, Ce:0.5; Zr:0.12, Si＜0.8, Mn＜1.5, S＜0.03; P＜0.04, all the other are Fe, the step of preparation process of this rapid steel is: 1. ordinary scrap steel, the pig iron, ferrotungsten, molybdenum-iron, vanadium iron, ferrochrome, ferro-niobium, ferrotianium, nickel plate and cobalt metal are mixed by the mentioned component requirement and put into the electric furnace heat fused; 2. the stokehold is adjusted to branch and temperature is risen to 1580 ℃-1630 ℃ after qualified, adds the Al deoxidation and the alloying that account for molten steel weight 0.6%, then comes out of the stove; Alterant, cerium base magnesium-rare earth are crushed to the fritter of granularity less than 15mm, after oven dry below 200 ℃, place the casting ladle bottom, with the method that pours in the bag molten steel is carried out composite inoculating and handle; 3. adopt gray iron or magnesium iron casting mold, be preheated to 235 ℃ after at internal surface brushing refractory paint, thickness is 1.0mm, is installed on after the mould drying on the whizzer, is preheated to 285 ℃ of waiting for pouring; The adjustment liquid steel temperature is 1530 ℃, starts whizzer, and making its rotating speed is 900rpm; With pouring molten steel in casting mold; Pouring molten steel finishes behind the 25min, closes whizzer, from casting mold, takes out strand and handles directly into furnace annealing; Annealing treating process is: strand is not less than 200 ℃ heat treatment furnace with temperature and is heated to 725 ℃ of insulation 1.5h; Continue to be heated to 1040 ℃ of insulation 6h then, stove is cold to get final product, and then strand is carried out roughing;
Described heat treating method does, carries out quench treatment after the roughing, and quenching processing technology is to be heated to 1270 ℃ with stove, insulation 4h; Oil quenching carries out temper after the quenching then, and temper technology is to be heated to 635 ℃ with stove, insulation 6h; Stove is cold, and then is heated to 620 ℃, insulation 6h; Air cooling carries out precision work after the temper, obtain the satisfactory roll of dimensional precision and surface smoothness.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technical process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (1)
1. a roll is characterized in that the chemical constitution of said rapid steel is made up of following component by weight percentage: C:3.2-3.6, W:1.2-1.6 with the heat treating method of rapid steel; Mo:5.0-7.0, V:2.0-3.0, Cr:8.0-10.0, Al:0.1-0.4; N i:2.2-2.6, Co:6.5-7.5, Nb:0.2-0.4; T i:0.2-0.4, Ce:0.4-0.6, Zr:0.05-0.20; Si＜0.8, Mn＜1.5, S＜0.03; P＜0.04, all the other are Fe, the step of preparation process of this rapid steel is: 1. ordinary scrap steel, the pig iron, ferrotungsten, molybdenum-iron, vanadium iron, ferrochrome, ferro-niobium, ferrotianium, nickel plate and cobalt metal are mixed by the mentioned component requirement and put into the electric furnace heat fused; 2. the stokehold is adjusted to branch and temperature is risen to 1580 ℃-1630 ℃ after qualified, adds the Al deoxidation and the alloying that account for molten steel weight 0.3%-0.8%, then comes out of the stove; Alterant, cerium base magnesium-rare earth are crushed to the fritter of granularity less than 15mm, after oven dry below 200 ℃, place the casting ladle bottom, with the method that pours in the bag molten steel is carried out composite inoculating and handle; 3. adopt gray iron or magnesium iron casting mold, be preheated to 230-240 ℃ after at internal surface brushing refractory paint, thickness is 0.8-1.2mm, is installed on after the mould drying on the whizzer, is preheated to 270-300 ℃ of waiting for pouring; The adjustment liquid steel temperature is 1510-1550 ℃, starts whizzer, and making its rotating speed is 800rpm-1000rpm; With pouring molten steel in casting mold; Pouring molten steel finishes behind the 20min-30min, closes whizzer, from casting mold, takes out strand and handles directly into furnace annealing; Annealing treating process is: strand is not less than 200 ℃ heat treatment furnace with temperature and is heated to 700 ℃-750 ℃ insulation 1h-2h; Continue to be heated to 1030 ℃-1050 ℃ insulation 4h-8h then, stove is cold to get final product, and then strand is carried out roughing;
Described heat treating method does, carries out quench treatment after the roughing, and quenching processing technology is to be heated to 1260 ℃-1280 ℃ with stove, insulation 3h-5h; Oil quenching carries out temper after the quenching then, and temper technology is to be heated to 620 ℃-650 ℃ with stove, insulation 5h-7h; Stove is cold, and then is heated to 610 ℃-630 ℃, insulation 5h-7h; Air cooling carries out precision work after the temper, obtain the satisfactory roll of dimensional precision and surface smoothness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102317356A CN102766745A (en) | 2012-07-05 | 2012-07-05 | Heat treatment method for high-speed steel for rollers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102317356A CN102766745A (en) | 2012-07-05 | 2012-07-05 | Heat treatment method for high-speed steel for rollers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102766745A true CN102766745A (en) | 2012-11-07 |
Family
ID=47094310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102317356A Withdrawn CN102766745A (en) | 2012-07-05 | 2012-07-05 | Heat treatment method for high-speed steel for rollers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102766745A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480396A (en) * | 2014-12-31 | 2015-04-01 | 芜湖金龙模具锻造有限责任公司 | Preparation method of wear-resisting superhard high-speed steel |
| CN105296859A (en) * | 2015-11-15 | 2016-02-03 | 丹阳市蓝锐粉末合金制品有限公司 | High-speed steel containing chromium |
| CN106244943A (en) * | 2016-08-19 | 2016-12-21 | 合肥东方节能科技股份有限公司 | A kind of guide wheel preparation method based on Laigang alloy |
| CN111283204A (en) * | 2020-02-18 | 2020-06-16 | 北京科技大学 | A kind of preparation method of chromium molybdenum vanadium type speed skating blade material |
-
2012
- 2012-07-05 CN CN2012102317356A patent/CN102766745A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480396A (en) * | 2014-12-31 | 2015-04-01 | 芜湖金龙模具锻造有限责任公司 | Preparation method of wear-resisting superhard high-speed steel |
| CN105296859A (en) * | 2015-11-15 | 2016-02-03 | 丹阳市蓝锐粉末合金制品有限公司 | High-speed steel containing chromium |
| CN106244943A (en) * | 2016-08-19 | 2016-12-21 | 合肥东方节能科技股份有限公司 | A kind of guide wheel preparation method based on Laigang alloy |
| CN111283204A (en) * | 2020-02-18 | 2020-06-16 | 北京科技大学 | A kind of preparation method of chromium molybdenum vanadium type speed skating blade material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103624084B (en) | Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof | |
| CN103866200B (en) | High-boron high-speed steel combined roller and manufacturing method thereof | |
| CN105618715B (en) | A kind of wear-resistant high speed steel composite roll and preparation method thereof | |
| CN100369681C (en) | A high-speed steel composite roll and its manufacturing method | |
| CN100370050C (en) | A guide roller for introducing steel billets into a high-speed wire rolling mill and its preparation method | |
| CN102766824B (en) | Abrasion-resistant high-speed-steel roller ring and preparation method thereof | |
| CN102962423B (en) | Centrifugal high-carbon, high-boron and high-speed steel composite roller shell and fabrication method of combined roller of composite roller shell | |
| CN105750529B (en) | A kind of high tungsten high abrasion compound high speed steel roll and preparation method thereof | |
| CN101407891B (en) | Boron-containing semi-high speed steel cold roller and manufacturing method thereof | |
| CN103526125B (en) | A kind of semisteel roll and manufacture method thereof | |
| CN102409267B (en) | Boron-containing high speed steel roller and preparation method thereof | |
| CN103320710B (en) | High-toughness high-speed steel composite roll | |
| CN102864372A (en) | Wear-resisting rolling mill guide and guard and manufacture method thereof | |
| CN104148399A (en) | Wear-resisting roll used for steel rolling intermediate mill frame and manufacturing method thereof | |
| CN101480663B (en) | Manufacturing Technology of High Alloy Centrifugal Composite Cast Steel Backing Roll | |
| CN101530863A (en) | Alloy cast steel roll and preparation method thereof | |
| CN104388812A (en) | High-speed steel composite roller for rods/wires and preparation method of high-speed steel composite roller | |
| CN104438337B (en) | A kind of abrasion-resistant roller for cold rolling of strip steel and preparation method thereof | |
| CN105177447A (en) | Centrifugal cast Cr12MoV shape steel straightening roll and production technology thereof | |
| CN104018096A (en) | High-speed steel roll collar and preparation method thereof | |
| CN103993220B (en) | A kind of Hypoeutectic high-chromium white cast iron roll and preparation method | |
| CN101215671B (en) | Anti-corrosion wear material of molten zinc and manufacturing method thereof | |
| CN102634738A (en) | Supporting roller with roughness keeping capability and manufacturing method thereof | |
| CN106282771A (en) | A kind of hot rolling cogging high alloy tool steel roll and preparation method | |
| CN100404152C (en) | High speed steel composite roll and its preparing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20121107 |