CN1861828A - Alloy half steel composite roll collar and preparation process thereof - Google Patents
Alloy half steel composite roll collar and preparation process thereof Download PDFInfo
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- CN1861828A CN1861828A CN 200510039264 CN200510039264A CN1861828A CN 1861828 A CN1861828 A CN 1861828A CN 200510039264 CN200510039264 CN 200510039264 CN 200510039264 A CN200510039264 A CN 200510039264A CN 1861828 A CN1861828 A CN 1861828A
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Abstract
This invention relates to the improvement of cold or hot roll casting steel semisteel compound roll collar and its preparation method. Its characteristic is the ingredient of the semisteel working lining, such as C 1.80-2.20%, Si 0.50-0.80%, Mn 0.80-1.10%, Ni 1.2-1.7%, Cr 2.80-3.20%, Mo 0.4-0.6%, P<=0.03% and S<=0.03%, the other is Fe and some residual element. When it is centrifugally cast, it should be separately controlled the steel liquid temperature of working lining at 80-100DEG C and the steel liquid temperature of inner casting lining is 90-110DEG C higher than the measurement of the liquid linear temperature. As the surface temperature of working lining is 50-80DEG C lower than the measurement of the liquid linear temperature, we can cast the inner lining. The semisteel gets by this way contained high carbon and alloy, and its basic composition mainly are bainite, carbonide and pearlite, so it has better hardness, toughness and abradability. The yield of millimeter steel can improve more than twice, and the working lining can combine fine with inner metallurgy.
Description
Technical field
The invention relates to improvement to heat or cold rolling cast steel alloy half steel composite roll collar and preparation method.
Background technology
Existing heat or cold rolling cast steel collars (also claiming the roller circle), the work skin mostly is to adopt for example described or similar middle low-carbon alloy half steel manufacturing of GB1503-89, the composite ring that this kind half steel is formed, and the wear resistance that main deficiency is a material is not high, cause collars not long work-ing life, rolling yielding poorly.Though Chinese patent 97103848.1 disclosed semi-steel composite rolls, roll half steel working lining is formed slightly adjustment, its chemical constitution is: (Wt%): 1.2-2.0%C, 0.15-0.3%Si, 0.6-1.0%Mn, 0.4-0.7%Ni, 1.2-1.8%Cr, 0.2-0.6%Mo, P≤0.1%, S≤0.03%, all the other Fe, yet gained working lining matrix, still be mainly perlite, wear resistance and obdurability are relatively low, and be easy to wear in operation of rolling central roll face, cause shorten work-ing life, amount of rolling is still not high.Secondly, the composite ring that existing middle low-carbon alloy half steel working lining and graphitized steel internal layer are formed, both adopt centrifugal composite casting.Yet because two kinds of molten steel materials of working lining and internal layer are different; cast is difficult to control; inclusion can not get discharging when for example pouring into a mould; be present in combining site and cause casting flaw; thereby ectonexine occurs through regular meeting and be difficult to the metallurgical binding that reaches good, cause making and use in all ftracture easily.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of wear resistance good, the alloy half steel composite roll collar of long service life.
Another object of the present invention is to provide a kind of working lining to combine good alloy half steel composite roll collar preparation method with internal layer.
The present invention's first purpose realizes, it is characterized in that adding a certain amount of carbon, chromium, nickel, molybdenum alloy or pure metal in existing alloy half steel, thereby obtains the high-carbon high-alloy half steel, significantly improved wear resistance, thereby improves a lot work-ing life.Specifically, alloy half steel composite roll collar of the present invention comprises half steel working lining and globular graphite steel internal layer, it is characterized in that said half steel working lining composition is: C1.80～2.20%, Si0.50～0.80%, Mn0.80～1.10%, Ni1.20～1.70%, Cr2.80～3.20%, Mo0.40～0.60%, P≤0.03%, S≤0.03%, surplus is Fe and small portion of residual element.
Carbon is carbide forming element, the raising of carbon content in the alloy ingredient, and carbide content is corresponding in the working lining is improved, thereby has improved the hardness of collars working lining, and wear resistance.
Chromium, it is carbide forming element, also be to postpone the effective element of bainite transformation, when chromium and carbon content increase, at this moment bainite transformation speed reduces greatly, and time temperature transformation curve moves to right greatly, and the position also acutely descends, the bainite structure that the wear resistance that is easy to get is good, thereby make material have higher-strength, toughness and wear resistance.
Nickel, solid solution is in ferrite, in reinforced ferrite, also can increase toughness, nickel and chromium coexist, and significantly improve the over-all properties of alloy half steel, and nickel has the raising stabilization of austenite, with slow down the effect that austenitic transformation is a perlite speed, therefore the high more effect of nickel content is obvious more, is easy to form the bainite structure of excellent property equally.
Molybdenum, it is carbide forming element, there is crystal grain thinning to increase case depth, improve the temper resistance effect, molybdenum content improves, and has the bainite structure of inhibition Decomposition, is easy to form bainite structure, thereby make the alloy half steel that the working lining matrix becomes higher bainite structure, and make its performance high intensity and wear resistance.
High-carbon high-alloy half steel composite roll collar preparation method of the present invention, comprise centrifugal casting working lining and internal layer, when it is characterized in that pouring into a mould working lining, the temperature of control cast molten steel adds 80-100 ℃ for measuring liquidus temperature, and when interface temperature is lower than liquidus temperature 50-80 ℃, pour into a mould internal layer, internal layer molten steel teeming temperature adds 90-110 ℃ for the liquidus temperature of measuring.
When cast, for preventing that big flow molten steel from washing away the working lining internal surface when filling out internal layer watering, cause the working lining became uneven to spare defective, a kind of filling internal layer better adopts many pouring mouths form, for example be arranged with three pouring mouths by 120 °, the many pouring mouths of internal layer molten steel go out stream like this, can effectively reduce the washing away of a certain concentration zones, thereby avoid above-mentioned defective.Described many pouring mouths, a kind of being preferably adopts molten steel to go out the stream head to be provided with and to be provided with three and to go out head piece impartial the branch.
The present invention is owing to increase carbon, chromium, nickel, molybdenum content in alloy half steel, make chromium content reach 2.80～3.20%, carbon content reaches 1.8-2.2%, nickel content reaches 1.2-1.70%, molybdenum content reaches 0.4-0.6%, thereby the high-carbon high-alloy half steel that obtains, matrix is mainly bainite, carbide and perlite, thereby has higher intensity, toughness and wear resistance.Therefore, the existing half steel collars of the present invention, wear resistance is good, long service life, the millimeter amount of rolling can improve more than two times.The control of teeming temperature of the present invention not only helps the metallurgical binding of interlayer and obtains good as-cast structure, and makes the alloying element of working lining be difficult for can avoiding the reduction of inner layer material intensity to the internal layer diffusion.
Below in conjunction with two embodiments, further specify the present invention.
Embodiment
Embodiment 1: difference melting alloy half steel of the present invention and globular graphite steel (prior art formula).Press high-carbon high-alloy half steel composition, the steel scrap and the steel scrap roller of proportioning are put into the intermediate frequency furnace melting, molten clear post analysis raw steel water chemistry composition, allocate corresponding alloy material or pure metal again into, it is C1.95% that melting obtains composition, Si0.54%, Mn0.92%, Ni1.53%, Cr2.97%, Mo0.52%, P0.028%, S0.02%, surplus is Fe and small portion of residual element molten steel.By vertical centrifugal cast composite ring, cast working lining when molten steel is 1437 ℃, when interface temperature was 1270 ℃, the cast internal layer obtained composite ring when the globular graphite molten steel temperature was 1355 ℃.Through thermal treatment, the roll working lining hardness 57HSD that obtains, through rolling test, the collars amount of rolling improved more than two times more originally.
Embodiment 2: as embodiment 1, press high-carbon high-alloy half steel composition, the steel scrap and the steel scrap roller of proportioning are put into the intermediate frequency furnace melting, molten clear post analysis raw steel water chemistry composition is allocated corresponding alloy material or pure metal again into, and it is C1.98% that melting obtains composition, Si0.53%, Mn0.98%, Ni1.64%, Cr3.03%, Mo0.57%, P0.024%, S0.022%, surplus is Fe and small portion of residual element.The centrifugal casting composite ring, cast working lining when molten steel is 1435 ℃, when interface temperature was 1266 ℃, the cast internal layer obtained composite ring when the globular graphite molten steel temperature was 1357 ℃.Through thermal treatment, the roll working lining hardness 61HSD that obtains, through rolling test, the collars amount of rolling improves more than two times.
Claims (5)
1, alloy half steel composite roll collar, comprise half steel working lining and globular graphite steel internal layer, it is characterized in that said half steel working lining composition is: C1.80～2.20%, Si0.50～0.80%, Mn0.80～1.10%, Ni1.20～1.70%, Cr2.80～3.20%, Mo0.40～0.60%, P≤0.03%, S≤0.03%, surplus are Fe and small portion of residual element.
2, according to the described alloy half steel composite roll collar preparation method of claim 1, comprise centrifugal casting working lining and internal layer, when it is characterized in that pouring into a mould working lining, the temperature of control cast molten steel adds 80-100 ℃ for measuring liquidus temperature, and when interface temperature is lower than liquidus temperature 50-80 ℃, pour into a mould internal layer, internal layer molten steel teeming temperature adds 90-110 ℃ for the liquidus temperature of measuring.
3,, it is characterized in that said internal layer is cast for many pouring mouths and goes out stream according to the described alloy half steel composite roll collar preparation method of claim 2.
4, according to the described alloy half steel composite roll collar preparation method of claim 3, it is characterized in that the stream pouring mouth has three, arrange by 120 ° of five equilibriums.
5,, it is characterized in that three go out to flow pouring mouth and are arranged on samely to go out on the stream head according to the described alloy half steel composite roll collar preparation method of claim 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100392649A CN100392139C (en) | 2005-05-11 | 2005-05-11 | Alloy half steel composite roll collar and preparation process thereof |
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| CNB2005100392649A CN100392139C (en) | 2005-05-11 | 2005-05-11 | Alloy half steel composite roll collar and preparation process thereof |
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| CN1861828A true CN1861828A (en) | 2006-11-15 |
| CN100392139C CN100392139C (en) | 2008-06-04 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039314A (en) * | 2010-11-23 | 2011-05-04 | 唐山大方铸造有限公司 | High-carbon semi-steel composite roll collar and manufacturing method thereof |
| CN101695714B (en) * | 2009-10-28 | 2011-06-22 | 安泰科技股份有限公司 | Cast steel back-up roller and preparation method thereof |
| CN102978537A (en) * | 2012-12-10 | 2013-03-20 | 张家港市鼎力铸钢有限公司 | Wear-resistant cast steel |
| CN103526125A (en) * | 2012-07-06 | 2014-01-22 | 江苏东冶轧辊有限公司 | Semi-steel roll and manufacturing method thereof |
| CN105088091A (en) * | 2015-08-12 | 2015-11-25 | 中钢集团邢台机械轧辊有限公司 | High-carbon graphitic steel roller ring for profile steel universal mill and manufacturing method of high-carbon graphitic steel roller ring |
| CN105177447A (en) * | 2015-10-16 | 2015-12-23 | 唐山钢铁集团有限责任公司 | Centrifugal cast Cr12MoV shape steel straightening roll and production technology thereof |
| CN105331794A (en) * | 2015-10-28 | 2016-02-17 | 中钢集团邢台机械轧辊有限公司 | Thermal treatment technology method for high-carbon half-steel roll collar |
| CN105821329A (en) * | 2016-04-28 | 2016-08-03 | 宁国市开源电力耐磨材料有限公司 | High-strength and low-chromium forge material and preparing method thereof |
| CN111168030A (en) * | 2020-02-04 | 2020-05-19 | 三鑫重工机械有限公司 | Graphite-containing bainite semisteel plate strip rough rolling working roll |
| CN115044836A (en) * | 2022-08-15 | 2022-09-13 | 江苏凯达重工股份有限公司 | Improved graphite semisteel roller and preparation method thereof |
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| US4775000A (en) * | 1986-08-27 | 1988-10-04 | Ayers Jack D | Continuous casting of tubular shapes by incremental centrifugal material deposition |
| CN1080329A (en) * | 1992-06-13 | 1994-01-05 | 首钢总公司 | The tilting roller cover and the manufacture method thereof of half steel material |
| CN1194897A (en) * | 1997-04-01 | 1998-10-07 | 本溪钢铁(集团)有限责任公司 | Centrifugal casting method for producing semi-steel composite roll |
| JP3534650B2 (en) * | 1999-06-08 | 2004-06-07 | 三井金属鉱業株式会社 | Die, die casting and die casting products |
| JP2001279367A (en) * | 2000-03-29 | 2001-10-10 | Nippon Steel Corp | Roll for hot rolling made by centrifugal casting |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101695714B (en) * | 2009-10-28 | 2011-06-22 | 安泰科技股份有限公司 | Cast steel back-up roller and preparation method thereof |
| CN102039314A (en) * | 2010-11-23 | 2011-05-04 | 唐山大方铸造有限公司 | High-carbon semi-steel composite roll collar and manufacturing method thereof |
| CN103526125A (en) * | 2012-07-06 | 2014-01-22 | 江苏东冶轧辊有限公司 | Semi-steel roll and manufacturing method thereof |
| CN103526125B (en) * | 2012-07-06 | 2015-10-21 | 江苏东冶轧辊有限公司 | A kind of semisteel roll and manufacture method thereof |
| CN102978537A (en) * | 2012-12-10 | 2013-03-20 | 张家港市鼎力铸钢有限公司 | Wear-resistant cast steel |
| CN105088091A (en) * | 2015-08-12 | 2015-11-25 | 中钢集团邢台机械轧辊有限公司 | High-carbon graphitic steel roller ring for profile steel universal mill and manufacturing method of high-carbon graphitic steel roller ring |
| CN105177447A (en) * | 2015-10-16 | 2015-12-23 | 唐山钢铁集团有限责任公司 | Centrifugal cast Cr12MoV shape steel straightening roll and production technology thereof |
| CN105331794A (en) * | 2015-10-28 | 2016-02-17 | 中钢集团邢台机械轧辊有限公司 | Thermal treatment technology method for high-carbon half-steel roll collar |
| CN105821329A (en) * | 2016-04-28 | 2016-08-03 | 宁国市开源电力耐磨材料有限公司 | High-strength and low-chromium forge material and preparing method thereof |
| CN111168030A (en) * | 2020-02-04 | 2020-05-19 | 三鑫重工机械有限公司 | Graphite-containing bainite semisteel plate strip rough rolling working roll |
| CN115044836A (en) * | 2022-08-15 | 2022-09-13 | 江苏凯达重工股份有限公司 | Improved graphite semisteel roller and preparation method thereof |
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| CN100392139C (en) | 2008-06-04 |
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Owner name: JIANGSU GONGCHANG ROLL JOINT-STOCK CO., LTD. Free format text: FORMER NAME: GONGCHANG ROLL CO., LTD., JIANGSU |
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Address after: 214253 new town, Yixing, Jiangsu Patentee after: JIANGSU GONGCHANG ROLL JOINT-STOCK CO., LTD. Address before: 214253 new town, Yixing, Jiangsu Patentee before: Gongchang Roll Co., Ltd., Jiangsu |
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Denomination of invention: Alloy half steel composite roll collar and preparation process thereof Effective date of registration: 20170619 Granted publication date: 20080604 Pledgee: Jiangsu Yixing rural commercial bank Limited by Share Ltd new sub branch Pledgor: JIANGSU GONGCHANG ROLL JOINT-STOCK CO., LTD. Registration number: 2017990000496 |