CN103320710A - High-toughness high-speed steel composite roll - Google Patents
High-toughness high-speed steel composite roll Download PDFInfo
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Abstract
The invention discloses a high-toughness high-speed steel composite roll belonging to the technical field of metal pressure processing. A working layer of the roll is made of a high-toughness high-speed steel material, and the core part of the roll is made of a graphitic steel material; the high-speed steel material and the graphitic steel material are in metallurgical bonding and formed through centrifugally casting and compounding. The high-speed steel material comprises the chemical components in percentage by weight: 0.5-1.3% of C, 0.5-1.5% of Si, 0.4-1.0% of Mn, 5.0-10.0% of Cr, 2.0-5.0% of Mo, 0.5-1.5% of Ni, 0.1-2.0% of W, 0.1-2.0% of V, 0.05-0.6% of N, 0.01-0.5% of RE, less than 0.03% of R, less than 0.025% of S and the balance of Fe; the graphitic steel material comprises the following chemical components in percentage by weight: 1.2-2.0% of C, 1.5-2.5% of Si, 0.3-1.0% of Mn, 0.2-1.2% of Ni, 0.01-0.2% of Cr, 0.01-0.2% of Mo, less than 0.035% of P, less than 0.03% of S and the balance of Fe. The high-toughness high-speed steel composite roll has the advantages that the breakage of the roll in the production process is reduced, the rate of finished products is increased, the manufacturing cost of the roll is reduced, the online service time of the roll is prolonged, the operating rate of a rolling mill is increased, and the consumption of the roll is reduced.
Description
Technical field
The invention belongs to the stress metal processing technique field, a kind of high tenacity compound high speed steel roll particularly is provided, be applicable to the manufacturing of composite roll in the Steel-rolling Industry.
Background technology
Milling train is the visual plant in the stress metal processing, is the distinctive marks of weighing a national Iron ﹠ Steel Development state of the art.And roll is the chief component of milling train, a large amount of key parts that consume during steel rolling is produced, it is the basic guarantee that determines a national rolling technique developmental level, in the steel rolling industrial production, none is not to rely on the rolling of roll and be shaped for each stocking, in other words " good-for-nothing without roller " is so the quality of roll and effect are most important.China in 2012 only line bar output has just reached 38,564 ten thousand tons, calculates if the average roll consumption amount of rolling line bar per ton is pressed 0.4KG, press roll existing market price, annual need consumption roll fund just up to 2,500,000,000 yuan about.Compound high speed steel roll is high with its hardness, wear resistance reaches well good result of use and generally adopted by vast steel rolling circle and praise highly, and particularly high-speed steel roll is applied on the bar wire rod rolling mill, has started the rolling bar New Times with good over-all properties.
But, in existing compound high speed steel roll production technology, exist two aspect deficiency factors, the one, in roll high rigidity, high abrasion, what follow is exactly the poor toughness of roll, when particularly high-speed steel roll being used for merchant bar mill splitting rolling K3 frame, when roll used in the first round usually, piece just appears falling in cutting ren, causes normally Rolling Production; The 2nd, the manufacturing cost of roll is high.Therefore, development is to increase the task of top priority energy-saving and cost-reducing, that improve roll campaign with development and manufacturing cost compound high speed steel roll low, that obdurability is good.
In existing high-speed steel roll production technology, such as ZL 97100083.2, the chemical composition of skin of the roll rapid steel is: C1.2-2.5%; Si 0.3-1.5%; Mn 0.4-1.0%; Ni＜3.0%; Cr 3.0-8.0%; Mo 2.0-7.0%; V 2.0-7.0%; W 1.0-5.0%; RE 0.01-0.5%; P＜0.05%; S＜0.05%; Remaining is Fe.The manufacturing processed of compound high speed steel roll is that rapid steel liquid is poured in the whizzer casting mold of rotation, when outer field high speed molten steel has just solidified, pours into the alloy nodular cast iron liquid that is used as core of the roll again, makes this bi-material reach completely metallurgical binding.
High-speed steel roll is to develop on traditional M2 rapid steel basis, although all be referred to as rapid steel, but at composition very large difference is arranged, high-speed steel roll components of working layer obvious characteristic is to have higher carbon content, and higher content of vanadium and W content, so the carbide in the roll tissue is with WC, VC and W
2C is main, and WC, VC microhardness can reach about 3000HV, W
2The C microhardness can reach 2500-2800HV, and hardness is high, wear resistance good.But the density of metal W is 19.3kg/dm
3, W
2The density of C is 17.2kg/dm
3, the density of WC is 15.8kg/dm
3, under the effect of centrifugal force, cause metallic element and microstructure segregation and be gathered in working lining near the position of roll surface; The density of metal V only is 6.1kg/dm
3, the density of VC only is 5.7kg/dm
3, under the effect of centrifugal force, cause too metallic element and microstructure segregation and be gathered in working lining near the position of key coat, make dissimilar metallic element and carbide tissue distribution uneven, thereby cause high speed steel material toughness sharply to descend and uneven.
Simultaneously, in existing high-speed steel roll production technology is implemented, when the spheroidal graphite cast iron liquid of cast core of the roll, the working lining rapid steel layer internal surface that must will solidify dissolves certain degree of depth, and by in this a part of rapid steel that dissolves because the segregation of metallic element and tissue, contain a large amount of carbide V, after V element enters in the molten ductile cast iron of core of the roll, higher C content sharply increases the carbide quantity in the core of the roll Nodular Iron in the molten iron, even can be elevated to more than 20%, so just caused the intensity of roll key coat and core of the roll significantly to reduce.Especially contain the roll of this key coat in heat treatment process, often because the fracture that roll occurs at key coat place or the core place of roll because of the deficiency of intensity, the rate that manufactures a finished product of roll is reduced, and the production cycle can't guarantee, thereby causes the manufacturing cost of roll greatly to improve.
Summary of the invention
The purpose of this invention is to provide a kind of high tenacity compound high speed steel roll, this roll component is reasonable in design, and high, the anti-accident ability of toughness is strong; And manufacturing process is simple, production cost is low.
Roll working layer according to composite roll of the present invention is the high tenacity rapid steel, and according to the needs of stocking kind and specification, the thickness of roll working lining is usually at 30-70mm, and the core of the roll material is graphitized steel;
Composite roller operational layer high speed steel material and core graphitized steel material are metallurgical binding, and two kinds of materials of different nature are composited by rotary casting.
Roll working lining high speed steel material is high N, low W, low V high speed steel material; The specific chemical composition % by weight is: C 0.5-1.3%; Si 0.5-1.5%; Mn 0.4-1.0%; Cr 5.0-10.0%; Mo2.0-5.0%; Ni 0.5-1.5%; V 0.1-2.0%; W 0.1-2.0%; N 0.05-0.6%; RE 0.01-0.5%; P＜0.03%; S＜0.025%; Remaining is Fe.The chemical component weight % of core of the roll graphitized steel material is: C 1.2-2.0%; Si 1.5-2.5%; Mn 0.3-1.0%; Ni 0.2-1.2%; Cr 0.01-0.2%; Mo 0.01-0.2%; P＜0.035%; S＜0.03%; All the other are Fe.
The chemical composition design of a kind of high tenacity quick-cutting steel composite roller operational layer material of the present invention is according to as follows:
C is component important in the steel, and it improves the intensity of steel in the mode of solid solution and formation carbide, and when the C too high levels, the carbide amount increases in the tissue, is conducive to the raising of roll hardness, but toughness drop; Cross when low when C content, primary austenite broadens between the vitellarium, coarse grains, and the roll wear resistance reduces.Therefore C content is controlled at 0.5-1.3% more suitable.
Cr is strong carbide forming element, is to improve one of the most effective element of roll wear resistance, will form the Cr of some amount in the increase roll tissue along with Cr content
7C
3The type carbide, Cr
7C
3The microhardness of type carbide can reach 2000-2500HV, and wear resistance is good, and Cr
7C
3Type carbide thermostability is higher than Fe
3C type carbide.Cr can improve the hardening capacity of rapid steel, improves the contacting fatigue resistance of roll, and it can also improve the oxidation-resistance of rapid steel simultaneously, and always therefore the Cr content in the rapid steel be controlled at 5-10% with Cr content more suitable all more than 4%.
Mo can stop the carbide intercrystalline precipitation, is conducive to crystal grain thinning, improves the toughness of steel, can also improve temper resistance simultaneously, suppresses temper brittleness.Mo is close with the W effect in the rapid steel, but the equivalent coefficient of Mo is 1.8 times of W, simultaneously, and Mo
2The theoretical density of C type carbide is 9.18 kg/dm
3, compare W
2The density of C and the density of WC are much lower, consider to add Mo from the amount of carbide and segregation all favourable than adding W, but Mo can reduce again the thermal conductivity of steel, when the Mo too high levels, the poor thermal conductivity of steel, cause the roll thermal stresses to increase, thermal fatigue resistance descends, and therefore Mo content is controlled at 2.0-5.0% more suitable.
W is strong carbide forming element, is to improve the most effective alloying element of rapid steel wear resistance.In history, W is the first-selected element of rapid steel, and the contribution of other element all will be converted to the W equivalent.W mainly generates W
2C and WC type carbide, hardness is high, wear resistance good, and W can improve again hardenability and the oxidation-resistance of rapid steel simultaneously, but the action effect of W is often unsatisfactory in centrifugal casting quick-cutting steel, because the density of metal W is 19.3kg/dm
3, W
2The density of C is 17.2kg/dm
3, the density of WC is 15.8kg/dm
3, under the effect of centrifugal force, inevitably cause metallic element and microstructure segregation, so it is more suitable that product of the present invention is controlled at 0.1-2.0% with W content.
V and N are the performance that improves steel in the mode of solid solution matrix and formation carbide in rapid steel, when the rapid steel molten metal solidifies in casting mold, what usually at first separate out is the primary carbide of V, when having added N simultaneously in the rapid steel, because N and V have stronger avidity, increased V(C, N) separate out power, promoted V(C, N) separate out, and V(C, N) type carbide hardness is higher, wear resistance is better.When N content was low, precipitated phase was take VC as main, and nearly 60% V solid solution is in matrix, 35% V approximately arranged with V(C, N) form separate out; Along with the increase of N content, be transformed into gradually take vanadium nitride as main precipitated phase, when N content was high, nearly 70% V was with V(C, N) form separate out, 20% V solid solution is only arranged in matrix.N its strengthening effect in rapid steel is to realize by the nitride that forms disperse, and with the Carbide Phases ratio, nitride is more stable, and is more tiny.Owing to having separated out a large amount of tiny and stable V(C, N) phase, thus having suppressed grain growth, crystal grain is more tiny, and brittle transition temperature is just lower, and toughness is also just better.The adding of N has improved the impelling strength of steel, has improved the corrosion resistance nature of material, and the pitting corrosion resistant performance of N is about 30 times of chromium.But N has the stable austenite effect, and the adding of N has improved austenite with respect to martensitic stability, and its effect is about 25 times of nickel.So too high N all has restraining effect to martensite and martensite transformation.
Therefore, in roll working lining rapid steel of the present invention, it is more suitable that the add-on of V is controlled at 0.1-2.0%, the N add-on is controlled at 0.05-0.6%.
The common solid solution of Si is among matrix, higher Si is conducive to postpone the generation of Low-Temperature Temper Brittleness, and play solution strengthening effect, when the Si too high levels, austenite region is dwindled, and eutectic and eutectoid transformation temperature improve, and are easy to form ferrite, reduce the use properties of roll, usually Si content has been controlled at 0.5-1.5% more suitable.
Mn is the same with Ni all to be the matrix of refinement steel, the intensity that improves steel and the effective element of toughness, Ni is conducive to improve the mechanical property of steel, increase the hardening capacity of steel, Mn hinders the element that greying promotes that carbide forms, when too high levels, the increase of remained austenite content in can causing again organizing, residual austenite is disadvantageous in the thermal treatment of roll and use procedure.Therefore Mn content is controlled at 0.4-1.0% in Composition Design, and it is more suitable that Ni content is controlled at 0.5-1.5%.
The Re element is as reduction or the deimpurity element that disappears, purify hot metal quality on the one hand in rapid steel; The toughness that improves rapid steel as alterant on the other hand.In composite roller operational layer rapid steel composition of the present invention, Re purifies in addition crystal boundary and eliminates the effect of crackle, but must limit the add-on of Re element, so in the roll working lining rapid steel composition, the add-on of control Re is Re 0.03-0.10%.
Simultaneously, in order to obtain the over-all properties of good obdurability, must strictly control impurity content, its P content is no more than 0.03%, S content and is no more than 0.025%.
What the core material of a kind of high tenacity compound high speed steel roll of the present invention adopted is the graphitized steel material, compares with prior art compound high speed steel roll core ductile cast iron material, and core of the roll intensity is higher, toughness is better, and the manufacturing cost of core material is lower.
Composite roll manufacture method of the present invention is similar to prior art, at first be to select the working lining of the invention described above composite roll and the concrete composition of core material to smelt respectively, when the composition of molten steel and temperature reach set require after, molten steel with the working lining rapid steel is poured in the whizzer casting mold that rotating speed is 800 rev/mins of high speed rotating first, the molten steel pouring temperature of working lining rapid steel is 1500-1600 ℃, the temperature of casting mold is 100-200 ℃ during casting, and the thickness of precoated sand coating is 1-5mm in the casting mold.The molten steel of working lining rapid steel is crystallization and freezing under centrifugal action, behind the molten steel initial solidification of working lining rapid steel, whizzer stops the rotation, the working lining that solidified part is hung out with after the casting mold that is used for roll up-down rollers neck portion cooperates together with casting mold, pour into again the graphite molten steel for the composite roll core, the teeming temperature of core graphite molten steel is 1450-1550 ℃, namely makes composite roll after two kinds of different metals are by complete metallurgical melting cooling.
The innovative point of the technology of the present invention:
1, in compound high speed steel roll is made, utilize N to become a large amount of tiny, disperse and stable V(C, N with V-arrangement) phase, thus suppressed grain growth, strengthened the performance of rapid steel.Crystal grain is more tiny, and brittle transition temperature is just lower, and toughness is also just better.This has never seen report in roll manufacturing technology in the past.
2, according to the service performance requirement of merchant bar mill to high-speed steel roll, changed the road of high W, high V in the conventional rapid steel composition, reduce density and differed larger alloying element W, the add-on of V, by optimizing the design of high-speed steel roll composition, improved high-speed steel roll toughness, reduced the roll manufacturing cost.
Advantage of the present invention:
1, because the appropriate design of roll working layer rapid steel composition, reduced the formation of lath-shaped eutectic carbides, caused the segregation of tissue when having avoided centrifugal casting, the toughness of rapid steel is significantly improved, both strengthened the anti-accident ability of roll, the work-ing life of having improved again roll.
2, the wear-resisting phase of roll working layer rapid steel---carbide particle is tiny, be evenly distributed, and has higher hardness and better wear resistance.
3, cause that owing to having eliminated centrifugal casting a large amount of VC assemble near the segregation at key coat position at working lining, therefore at the graphite molten steel of cast core of the roll during to the working lining rapid steel generation metallurgical melting that solidified, avoided excessive V element enter in the core of the roll graphitized steel the harm of the roll key coat that causes and core of the roll strength decreased.Reduced the fracture of roll in manufacturing process on the one hand, improved yield rate, reduced roll manufacturing cost, the profit margin that has increased product and the market competitiveness; Because core of the roll intensity is high, break resistance good, greatly improves online duration of service of roll and operating rate of rolling mill, reduced roll consumption on the other hand.
Description of drawings
Fig. 1 is product structure figure of the present invention.
Embodiment
Be rapid steel by roll working layer of the present invention, the core of the roll material is the composition of graphitized steel, and we are four batches of high tenacity compound high speed steel rolls that prepare altogether 8 embodiment of the invention successively, and these 8 rolls are qualified product and mail to the user and use.
Embodiment 1: the high speed molten steel that will be used as the roll working lining is smelted respectively with the graphite molten steel that is used as core of the roll, and the chemical component weight % of roll working lining rapid steel molten steel is: C 0.65%; Si 0.86%; Mn 0.64%; Cr 9.81%; Mo 4.15%; Ni 0.58%; V 0.98%; W 0.54%; N 0.36%; RE 0.054%; P 0.030%; S 0.022%; Remaining is Fe, and the chemical component weight % of core of the roll graphitized steel molten steel is: C 1.77%; Si 1.93%; Mn 0.43%; Ni 0.95%; Cr 0.12%; Mo 0.11%; P 0.029%; S 0.022%; All the other are Fe.
Skim after the tapping of working lining rapid steel molten steel is left standstill, being poured into immediately rotating speed is that the pouring temperature of molten steel is 1548 ℃ in the whizzer casting mold of 800 rev/mins of high speed rotating, and the temperature of casting mold is 128 ℃ during casting, and paint thickness is 3mm in the casting mold; Whizzer is shut down when the high speed molten steel of working lining has just solidified; the working lining that solidified is sling with after the casting mold that is used for roll up-down rollers neck portion cooperates from whizzer together with casting mold; pour into the graphitized steel molten steel for the composite roll core, the teeming temperature of core graphitized steel molten steel is 1545 ℃ again.
Embodiment 2: the high speed molten steel that will be used as the roll working lining is smelted respectively with the graphite molten steel that is used as core of the roll, and the chemical component weight % of roll working lining rapid steel molten steel is: C 1.21%; Si 0.95%; Mn 0.46%; Cr 5.09%; Mo 3.11%; Ni 0.81%; V 1.52%; W 1.73%; N 0.08%; RE 0.042%; P 0.020%; S 0.023%; Remaining is Fe, and the chemical component weight % of core of the roll graphitized steel molten steel is: C 1.91%; Si 2.02%; Mn 0.58%; Ni 0.56%; Cr 0.13%; Mo 0.09%; P 0.032%; S 0.018%; All the other are Fe.
Skim after the tapping of working lining rapid steel molten steel is left standstill, being poured into immediately rotating speed is that the pouring temperature of molten steel is 1526 ℃ in the whizzer casting mold of 800 rev/mins of high speed rotating, and the temperature of casting mold is 112 ℃ during casting, and paint thickness is 2.0mm in the casting mold; When just having solidified, the high speed molten steel of working lining shuts down; the working lining that solidified is sling with after the casting mold that is used for roll up-down rollers neck portion cooperates from whizzer together with casting mold; pour into the graphite molten steel for the composite roll core, the teeming temperature of core graphite molten steel is 1517 ℃ again.
Embodiment 3: the high speed molten steel that will be used as the roll working lining is smelted respectively with the graphite molten steel that is used as core of the roll, and the chemical component weight % of roll working lining rapid steel molten steel is: C 0.86%; Si 1.34%; Mn 0.86%; Cr 7.03%; Mo 3.65%; Ni 1.20%; V 1.11%; W 1.35%; N 0.19%; RE 0.071%; P 0.015%; S 0.020%; Remaining is Fe, and the chemical component weight % of core of the roll graphitized steel molten steel is: C 1.32%; Si 2.43%; Mn 0.79%; Ni 0.78%; Cr 0.09%; Mo 0.13%; P 0.029%; S 0.017%; All the other are Fe.
Skim after the tapping of working lining rapid steel molten steel is left standstill, being poured into immediately rotating speed is that the pouring temperature of molten steel is 1485 ℃ in the whizzer casting mold of 800 rev/mins of high speed rotating, and the temperature of casting mold is 175 ℃ during casting, and paint thickness is 2.5mm in the casting mold; When just having solidified, the high speed molten steel of working lining shuts down; the working lining that solidified is sling with after the casting mold that is used for roll up-down rollers neck portion cooperates from whizzer together with casting mold; pour into the graphite molten steel for the composite roll core, the teeming temperature of core graphite molten steel is 1478 ℃ again.
Embodiment 4: the high speed molten steel that will be used as the roll working lining is smelted respectively with the graphite molten steel that is used as core of the roll, and the chemical component weight % of roll working lining rapid steel molten steel is: C 1.02%; Si 0.77%; Mn 0.56%; Cr 9.05%; Mo 2.66%; Ni 0.98%; V 0.65%; W 0.85%; N 0.28%; RE 0.113%; P 0.017%; S 0.019%; Remaining is Fe, and the chemical component weight % of core of the roll graphitized steel molten steel is: C 1.58%; Si 1.96%; Mn 0.74%; Ni 0.86%; Cr 0.16%; Mo 0.17%; P 0.031%; S 0.018%; All the other are Fe.
Skim after the tapping of working lining rapid steel molten steel is left standstill, being poured into immediately rotating speed is that the pouring temperature of molten steel is 1520 ℃ in the whizzer casting mold of 800 rev/mins of high speed rotating, and the temperature of casting mold is 159 ℃ during casting, and paint thickness is 4.0mm in the casting mold; When just having solidified, the high speed molten steel of working lining shuts down; the working lining that solidified is sling with after the casting mold that is used for roll up-down rollers neck portion cooperates from whizzer together with casting mold; pour into the graphite molten steel for the composite roll core, the teeming temperature of core graphite molten steel is 1499 ℃ again.
The chemical composition of four batches of composite roller operational layer rapid steel of the embodiment of the invention and core graphitized steel is all listed in the table 1.In order to contrast conveniently, we have also enumerated simultaneously the composite roll composition of one group of prior art and have also listed in the table 1.The comparing result of embodiment of the invention composite roll and prior art roller performance is listed table 2 in.Embodiment of the invention composite roll and prior art roll use result's contrast to list table 3 in.
The production result of the technology of the present invention compound high speed steel roll, working lining toughness has improved about 60% as can be seen from Table 2, and core of the roll tensile strength has improved 30-40%, and the roll manufacturing cost has reduced by 30-35%, and qualification rate has improved about 20%.8 high-speed steel rolls that adopt the technology of the present invention to produce are all qualified, and product percent of pass is 100%, and adopt the roll that prior art is produced, and often scrap owing to core of the roll produces fracture in heat treatment process, and product percent of pass generally only has 75-85%.Because the raising of product percent of pass and the optimization of breaker roll alloying constituent, the roll manufacturing cost can reduce by 30-35% with respect to prior art products.By seeing in the table 3, when 8 compound high speed steel rolls of the present invention use in merchant bar mill splitting rolling K3 frame, the average steel rolling amount of every breaker roll list groove is 2 times of the average steel rolling amount of prior art roll list groove, and piece does not appear falling in cutting ren, and the prior art roll is when usually using in the first round, and piece just appears falling in cutting ren, causes normally Rolling Production, because the technology of the present invention core of the roll intensity is high, the roll breakage phenomenon does not occur in roll in using on the machine process simultaneously.
The contrast of each position composition % by weight of the composite roll of table 1 embodiment of the invention and prior art
Table 2 embodiment of the invention composite roll and the contrast of prior art roller performance
Table 3 embodiment of the invention composite roll and prior art roll use result's contrast
Claims (2)
1. high tenacity compound high speed steel roll, it is characterized in that, the working lining of this composite roll is the high tenacity high speed steel material, needs according to stocking kind and specification, the thickness of roll working lining is at 30-70mm, core of the roll is the graphitized steel material, and working lining high speed steel material and core graphitized steel material are metallurgical binding, and two kinds of materials of different nature are composited by rotary casting;
The chemical component weight % of described composite roller operational layer high tenacity high speed steel material is: C 0.5-1.3%; Si 0.5-1.5%; Mn 0.4-1.0%; Cr 5.0-10.0%; Mo2.0-5.0%; Ni 0.5-1.5%; W 0.1-2.0%; V 0.1-2.0%; N 0.05-0.6%; RE 0.01-0.5%; P＜0.03%; S＜0.025%; Remaining is Fe.
2. high tenacity compound high speed steel roll according to claim 1 is characterized in that, the chemical component weight % of described graphitized steel material is: C 1.2-2.0%; Si 1.5-2.5%; Mn 0.3-1.0%; Ni 0.2-1.2%; Cr 0.01-0.2%; Mo 0.01-0.2%; P＜0.035%; S＜0.03%; All the other are Fe.
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| CN101695714A (en) * | 2009-10-28 | 2010-04-21 | 安泰科技股份有限公司 | Cast steel back-up roller and preparation method thereof |
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| CN105618715A (en) * | 2016-01-12 | 2016-06-01 | 安徽环渤湾高速钢轧辊有限公司 | Abrasion-resistance high-speed steel composite roller and preparation method thereof |
| CN106140819A (en) * | 2016-08-31 | 2016-11-23 | 唐山亿联盛轧辊有限公司 | A kind of compound high speed steel roll and production method thereof |
| CN107119222A (en) * | 2017-03-20 | 2017-09-01 | 山东广富集团有限公司 | Centrifugal composite casting Cr8 alloy cast steels backing roll and manufacturing process |
| CN108015109A (en) * | 2017-12-08 | 2018-05-11 | 中钢集团邢台机械轧辊有限公司 | A kind of high-speed steel combines edger roll |
| CN108330385A (en) * | 2018-03-15 | 2018-07-27 | 邢台德龙机械轧辊有限公司 | Two layers of complex high-chromium iron roll and its manufacturing method |
| CN108330385B (en) * | 2018-03-15 | 2020-03-20 | 邢台德龙机械轧辊有限公司 | Two-layer composite high-chromium iron roller and manufacturing method thereof |
| CN110125370A (en) * | 2019-05-27 | 2019-08-16 | 鞍钢重型机械有限责任公司 | A kind of manufacturing method of the ultra-thin heat-resisting composite roll of rolling strip steel milling train |
| CN111945053A (en) * | 2020-07-13 | 2020-11-17 | 安徽环渤湾高速钢轧辊有限公司 | Method for preparing high-speed steel roller by composite modification treatment |
| CN112095053A (en) * | 2020-09-10 | 2020-12-18 | 宜兴市永昌轧辊有限公司 | High-wear-resistance cold roll and preparation method thereof |
| CN116024501A (en) * | 2022-12-15 | 2023-04-28 | 广东省科学院新材料研究所 | High-speed steel and preparation method and application thereof |
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Effective date of registration: 20191220 Address after: 122000 Chaoyang Liucheng Economic Development Zone, Chaoyang County, Chaoyang City, Liaoning Patentee after: Liaoning yiliansheng New Material Co., Ltd Address before: 063308 Hebei province Tangshan City Fengnan wanglanzhuang Town Industrial Zone Patentee before: Tangshan Yiliansheng Roller Co., Ltd. |