CN103276313B - High-speed steel roll collar and heat treatment method - Google Patents
High-speed steel roll collar and heat treatment method Download PDFInfo
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- CN103276313B CN103276313B CN201310192813.0A CN201310192813A CN103276313B CN 103276313 B CN103276313 B CN 103276313B CN 201310192813 A CN201310192813 A CN 201310192813A CN 103276313 B CN103276313 B CN 103276313B
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Abstract
The invention relates to a high-speed steel roll collar and a heat treatment method. The high-speed steel roll collar comprises the following elementary components in percentage by weight: 1.3-1.9% of C, 0.4-0.8% of B, 3.0-5.0% of Cr, 0.5-0.9% of Si, 0.6-1.3% of Mn, 2.0-10.0% of V, 0.5-1.5% of Ni, 1.0-4.0% of Mo, 0.1-2.0% of Nb, 4.5-5.0% of Co, 0.3-0.4% of Al, 0.02-0.04% of Ti, 0.05-0.2% of Zr, less than 0.04% of S, less than 0.04% of P, and the balance of Fe. By adopting the high-speed steel roll collar and the heat treatment method, the wear resistance, heat resistance and impact resistance of an alloy are greatly improved, thermal fatigue cracks generated in the use process of a roller and falling and disintegrating caused by the thermal fatigue cracks are reduced, and good safety and wear resistance of the roller are reflected. The high-speed steel roll collar is applied to a high-speed wire rod mill.
Description
Technical field
The present invention relates to rolling machinery field, particularly relate to a kind of high speed steel roll collar and heat treating method.
Background technology
China from 1986 from external introduce first bar high-speed rod-rolling mill production line since, development is extremely rapid, and current China builds high-speed rod-rolling mill production line more than 100, and the ultimate production of high line product is close to 50% of wire rod ultimate production.Along with the raising of rolling mill speed, breaker roll specification of quality is more and more higher, and particularly roller surface hardness requirement is more and more higher.Conventional roll material is rich chromium cast iron and high nickel chromium triangle infinitely chilled ductile cast iron, but in pre-finish rolling section and the finish rolling section of high-speed rod-rolling mill production line, because roll diameter of roller is little and speed of rotation is high, the assembly roller of usual employing collars and roll shaft mechanical combination, and collars is processed by powder metallurgy process by Wimet, high and the fragility of cost is large, the phenomenon such as easily occur quick-fried roller in using and peel off, and affects Rolling production.Therefore, the material problem solving collars effectively improves steel rolling operation efficiency and steel product quality, reduces and consume, alleviate labor strength, the effective measure of minimizing accident.Collars environment for use is severe, harsh to its performance requriements, collars material will have excellent mechanical property, current China only collars institute cost gold more than 3,000,000,000 yuan, develop suitable collars material and preparation method, be applied on steel rolling equipment, the fast development of Steel-rolling Industry will be promoted and save a lot of resource.
Summary of the invention
The object of this invention is to provide and a kind ofly can ensure that collars has excellent mechanical property, reduce production cost, improve high speed steel roll collar and the heat treating method of the steel product quality produced.
The present invention is achieved in that a kind of high speed steel roll collar, it is characterized in that: each elemental composition is by weight percentage: C:1.3-1.9, B:0.4-0.8, Cr:3.0-5.0, Si:0.5-0.9, Mn:0.6-1.3, V:2.0-10.0, Ni:0.5-1.5, Mo:1.0-4.0, Nb:0.1-2.0, Co: 4.5-5.0, Al:0.3-0.4, Ti:0.02-0.04, Zr:0.05-0.2, S < 0.04, P < 0.04, all the other are Fe.
The present invention includes following steps: annealing, quenching and 2-3 tempering, during annealing, collars is heated to 800-860 DEG C with stove, the cold or air cooling of stove after stove is chilled to and is less than 500 DEG C; During quenching, collars is heated to 1020-1150 DEG C with stove, subsequently air-cooled or air cooling; During tempering, collars is heated to 500-550 DEG C with stove, subsequently cold the or air cooling of stove, tempering 2-3 time under same process.
The present invention significantly improves Wear Resistance, thermotolerance, thermal-shock resistance, reduces the heat fatigue cracking phenomenon that in use occurs of roll and consequently to lose flesh, burst apart, embodying good security and wear resistance.
Embodiment
A kind of high speed steel roll collar, is characterized in that: each elemental composition is by weight percentage: C:1.3-1.9, B:0.4-0.8, Cr:3.0-5.0, Si:0.5-0.9, Mn:0.6-1.3, V:2.0-10.0, Ni:0.5-1.5, Mo:1.0-4.0, Nb:0.1-2.0, Co: 4.5-5.0, Al:0.3-0.4, Ti:0.02-0.04, Zr:0.05-0.2, S < 0.04, P < 0.04, all the other are Fe.The heat treating method of high speed steel roll collar, comprises the following steps: annealing, quenching and 2-3 tempering, and during annealing, collars is heated to 800-860 DEG C with stove, the cold or air cooling of stove after stove is chilled to and is less than 500 DEG C; During quenching, collars is heated to 1020-1150 DEG C with stove, subsequently air-cooled or air cooling; During tempering, collars is heated to 500-550 DEG C with stove, subsequently cold the or air cooling of stove, tempering 2-3 time under same process.During concrete enforcement, the present invention is containing in Molybdenum High Speed Steel, by improving carbon, content of vanadium, obtain the MC type carbide of high rigidity, on this basis, add more cobalt element, to increase the secondary hardening ability of rapid steel, red hardness and hot hardness, thus improve the high temperature abrasion resistance of collars.Also add appropriate aluminium, to improve roll red hardness further, and improve high temperature abrasion resistance, add aluminium and also can improve carbide morphology, impel carbide to become suspension shape and the distribution of isolated shape by continuous net-shaped distribution.Add appropriate niobium; the segregation of vanadium in collars centrifugal casting process can be alleviated; make the structure and properties of collars even; add the elements such as a small amount of rare earth, titanium, zirconium; object is in order to thinning microstructure, improves the homogeneity of distribution of carbides, improves collars over-all properties; guarantee the safe handling of collars, and realize large-scale production and the industrial applications of high speed steel roll collar.Because the constituent contents such as carbon, vanadium, cobalt, molybdenum are high, therefore after thermal treatment, hardness is high, and roll surface uniformity of hardness is good, and wear resistance is good, and wherein hardness reaches 69 ~ 71HRC, and roll surface difference of hardness is less than 1.5HRC.Due to adding of the elements such as cobalt, molybdenum, aluminium, make collars have excellent red hardness, the red hardness of 625 DEG C reaches 59 ~ 62HRC, makes collars at high temperature have excellent wear resistance, it not only can be applicable to high-speed rod-rolling mill pre-finishing mill frame, also can be applicable on high-speed rod-rolling mill finishing stand.The elements such as its middle-weight rare earths, titanium, zirconium, aluminium are after smelting, and fine microstructures, distribution of carbides is even, and therefore have higher bending strength, reach 1850 ~ 1960Mpa, impelling strength is greater than 10J/cm
2.Containing the high W elements of density, and niobium add the segregation can eliminating v element, therefore collars element segregation is light, and direction, collars roller footpath structure and properties is even, and in the radial 35mm of the body of roll, hardness drop is less than 2HRC.
The collars that the present invention produces has good result of use on high-speed rod-rolling mill.
Embodiment 1
High line pre-finishing mill frame uses, and effect is as follows: roll general line steel: the mono-groove of 5500 ~ 6000t/, and reconditioning quality 0.5 ~ 0.7mm/ is monolateral; Roll hard wire steel: the mono-groove of 3500 ~ 4000t/, reconditioning quality 0.6 ~ 0.8mm/ is monolateral.
Embodiment 2
Finishing mill of high-speed wire rod mill frame uses, and effect is as follows: roll general line steel: the mono-groove of 1200 ~ 1500t/, and reconditioning quality 0.5 ~ 0.7mm/ is monolateral; Roll hard wire steel: the mono-groove of 750 ~ 900t/, reconditioning quality 0.6 ~ 0.8mm/ is monolateral.
The steel rolling amount of collars of the present invention and reconditioning quality, no matter be applied to high line pre-finishing mill frame, still be applied on finishing stand, all reach the level of carbide roll ring, but production cost reduces by 40 ~ 50% than carbide roll ring, and the deficiency overcoming the explosive roller of carbide roll ring and peel off, reduce stocking production cost, there is significant economic and social benefit.
Claims (2)
1. a high speed steel roll collar, is characterized in that: each elemental composition is by weight percentage: C:1.3-1.9, B:0.4-0.8, Cr:3.0-5.0, Si:0.5-0.9, Mn:0.6-1.3, V:2.0-10.0, Ni:0.5-1.5, Mo:1.0-4.0, Nb:0.1-2.0, Co: 4.5-5.0, Al:0.3-0.4, Ti:0.02-0.04, Zr:0.05-0.2, S < 0.04, P < 0.04, all the other are Fe.
2. the heat treating method of a kind of high speed steel roll collar according to claim 1, it is characterized in that: comprise the following steps: annealing, quenching and 2-3 tempering, during annealing, collars is heated to 800-860 DEG C with stove, the cold or air cooling of stove after stove is chilled to and is less than 500 DEG C; During quenching, collars is heated to 1020-1150 DEG C with stove, subsequently air-cooled or air cooling; During tempering, collars is heated to 500-550 DEG C with stove, subsequently cold the or air cooling of stove, tempering 2-3 time under same process.
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| CN201310192813.0A CN103276313B (en) | 2013-05-23 | 2013-05-23 | High-speed steel roll collar and heat treatment method |
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| CN201310192813.0A CN103276313B (en) | 2013-05-23 | 2013-05-23 | High-speed steel roll collar and heat treatment method |
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| CN103276313B true CN103276313B (en) | 2015-05-13 |
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| CN103602925B (en) * | 2013-11-29 | 2015-08-12 | 内蒙古包钢钢联股份有限公司 | A kind of containing the heating of Ni steel and the method removing iron scale |
| CN103757556B (en) * | 2014-01-24 | 2015-11-11 | 东北大学 | A kind of Roller of High material for powder ore and roll surface preparation method |
| CN105755379B (en) * | 2016-03-09 | 2017-10-31 | 安徽环渤湾高速钢轧辊有限公司 | Wear-resistant high speed steel collars for kocks milling trains and preparation method thereof |
| CN105935776A (en) * | 2016-06-24 | 2016-09-14 | 中国航空工业集团公司西安飞机设计研究所 | Composite manufacturing method for titanium alloy lug |
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| JPS60128242A (en) * | 1983-12-15 | 1985-07-09 | Nippon Steel Corp | High manganese steel for nonmagnetic drill collar |
| CN100575528C (en) * | 2005-05-10 | 2009-12-30 | 酒泉钢铁(集团)有限责任公司 | Cobalt less multi element high speed tool steel and manufacture method thereof |
| CN101240402B (en) * | 2008-02-04 | 2010-04-07 | 娄底市三泰轧辊有限公司 | Cast high-boron high-speed steel for composite ring roller and heat treatment method thereof |
| CN101403032B (en) * | 2008-11-12 | 2010-06-23 | 中国科学院金属研究所 | Thermal treatment process for quick cutting steel composite roll |
| CN101831590B (en) * | 2009-03-10 | 2011-07-06 | 江苏东冶轧辊有限公司 | High-boron low-alloy high-speed steel roll and preparation method thereof |
| CN102766824B (en) * | 2012-07-04 | 2013-11-06 | 北京环渤湾高速钢轧辊有限公司 | Abrasion-resistant high-speed-steel roller ring and preparation method thereof |
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