CN103785815A - Manufacturing method of composite roll with outer layer made of high-speed steel - Google Patents
Manufacturing method of composite roll with outer layer made of high-speed steel Download PDFInfo
- Publication number
- CN103785815A CN103785815A CN201210422938.3A CN201210422938A CN103785815A CN 103785815 A CN103785815 A CN 103785815A CN 201210422938 A CN201210422938 A CN 201210422938A CN 103785815 A CN103785815 A CN 103785815A
- Authority
- CN
- China
- Prior art keywords
- temperature
- roll
- steel
- speed steel
- speed
- 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.)
- Pending
Links
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a manufacturing method of a composite roll with an outer layer made of high-speed steel. The manufacturing method comprises the following steps of 1 smelting the outer-layer high-speed steel of the roll to be molten steel; 2 manufacturing the composite roll, wherein the high-speed molten is poured in a casting mould rotating on a centrifugal machine, the casting mould rotating speed is 530-550 turns/minute, the molten steel pouring temperature is 1530-1560 DEG C; enabling the casting mould to continue to rotate for 10-20 minutes, then erecting the casting mould and filling roll core spherical graphite cast molten iron into the casting mould when the temperature reaches to 1230-1290 DEG C, arranging a roll blank in a heating furnace to perform stress relief annealing treatment, keeping the temperature for 10-12 hours when the heating temperature reaches to 350-450 DEG C, then cooling the furnace till the temperature is lower than 200 DEG C, taking out the blank from the furnace, air-cooling the blank to be at room temperature, and finally machining the blank to meet the specified dimension and accuracy.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, relate in particular to the preparation method that a kind of skin is the composite roll of high-speed steel.
Background technology
Roll is the larger metallurgical spare part of consumption during steel rolling is produced, the height of roll quality directly determines surface quality, dimensional accuracy and the milling train production operational availability of stocking, improve roller performance, extend roll working life, reduce roll production cost, be the important topic that domestic and international steel rolling is used enterprise and roll manufacturing enterprise constantly to pay close attention to, wherein high carbon and vanadium high speed steel roll is because hardness is high, the good Metallurgical Enterprise that enjoys of wearability is paid close attention to, and has been used widely.
Chinese invention patent CN101220440 discloses a kind of roll and production technology thereof, and roll is made up of W6Mo5Cr4V2 high-speed steel, and production technology is as follows: a. material is prepared; B. machining blanks both ends of the surface; C. process two ends centre bore; D. rough turn processing; E. bore hole for hoist outward in finished product length; F. carrying out modifier treatment makes hardness of roll body reach 40-50HSD; G. revise two ends centre bore; H. half finish turning processing; I. the body of roll is roughly ground; J. modifier treatment makes body surface quenching hardness reach 88-93HSD; K. process two ends length to requiring size; L. carry out finish turning processing; M. roughly grind the body of roll and roll neck; N. carry out de-stress processing; O. repair two ends centre bore; P. refine the body of roll and roll neck; Q. the super grinding body of roll and roll neck are to finished product.Chinese invention patent CN1197415 also discloses a kind of well behaved high-speed steel roll for hot-rolling.This roll is characterised in that, there is a skin, described outer field composition percentage by weight is: 2.4-2.9%C, < 1.0%Si, < 1.0%Mn, 12-18%Cr, 3-9%Mo, 3-8%V, 0.5-4.0%Nb, and meet following (1), (2) two formulas: (1) 0.27≤Mo (%)/Cr (%)≤0.7 simultaneously; (2) C (%)+0.2.Cr (%)≤6.2, all the other are Fe and inevitable impurity.
Chinese invention patent CN101225500 also discloses a kind of high-molybdenum high-vanadium microsegregation cast high speed steel for rolls.Following (wt%): the C 1.2～2.8% of its specific chemical composition, Si 0.2～1.0%, Mn 0.2～1.0%, Ni 0.3～1.2%, Cr 3.0～6.0%, Mo 5.0～10.0%, V 5.0～12.0%, Al 0.1～0.7%, P≤0.025%, S≤0.025%, all the other are iron.This invention feature be in high-speed steel, increase Mo, V content substitutes the W element in traditional High Speed Steel for Roller, the gravity segregation causing when the centrifugal casting to reduce heavy element W, but the carbide density of vanadium and formation thereof is low, in centrifugal casting process, be easily enriched in roll inner surface, cause roller performance inhomogeneous.Chinese invention patent CN100999804 also discloses a kind of novel high carbon high wolfram fast steel rolling roller and preparation method thereof, the high wolfram fast steel rolling roller of this invention medium high carbon contains: carbon 2.0%～3.0%, tungsten 6.0%～18.0%, vanadium 2.0%～4.0%, molybdenum 1.0%～3.0%, chromium 3.0%～9.0%, silicon is less than 1.2%, and manganese is less than 1.2%; The MC type double carbide that this high carbon high wolfram fast steel rolling roller of making contains vanadium, tungsten system.The preparation method of the high wolfram fast steel rolling roller of this invention medium high carbon is, high carbon high wolfram fast steel rolling is heated to 1580 ℃～1620 ℃ after deoxidation; 1400 ℃～1500 ℃ casting, centrifugal casting mould is applied the steady magnetic field of 0.05T～0.25T simultaneously, and rotate to moulding with 600-1800 rev/min of rotating speed.But the adding of electromagnetic field, skin of the roll is organized not fine and close, reduce roll wearability.Japan Patent JP2006/304932 also discloses a kind of centrifugally cast composite roll, and skin contains C:2.5～9%, Si:0.1～3.5%, Mn:0.1～3.5%, V:11～40%, and surplus is that Fe and inevitable impurity form; Intermediate layer, is made up of the high-speed steel class alloy that is formed at above-mentioned outer inner face; Internal layer, is made up of the cast iron or the cast steel that are formed at above-mentioned intermediate layer inner face.But above-mentioned high-speed steel roll all contains the alloying elements such as more expensive tungsten, molybdenum, vanadium, niobium, cobalt, cause roll production cost high, the competitiveness of promoting the use of is poor, and high-speed steel roll all will carry out high-temperature heat treatment, both wastes energy, contaminated environment, and in high-temperature heating and insulating process, make roller core microstructure coarsening, roller core hydraulic performance decline, cause, in roll use, roll breakage accident easily occurs, affect the normal operation of milling train.
Summary of the invention
The object of the invention is to propose the preparation method that a kind of skin is the composite roll of high-speed steel, this composite roll skin is that high-speed steel, roller core are magnesium irons, outer high-speed steel improves the hardness of high-speed steel by adjusting component, improve its wearability, make its as cast condition there is high rigidity, make roller core keep high strength, guarantee the safe handling of roll, and reduce costs.
For reaching this object, the present invention by the following technical solutions:
Skin is a preparation method for the composite roll of high-speed steel, and this composite roll comprises skin and roller core, and described outer field chemical composition is: C 1.5-1.7%, Cr 9.4-9.8%, Mo 4.8-5.2%, W 2.5-3.5%, V 1.3-1.7%, Nb 0.6-1.0%, Ti 0.2-0.4%, Si 0.5-0.7%, Mn 0.1-0.3%, N 0.06-0.1%, S≤0.03%, P≤0.03%, all the other are Fe and inevitable impurity; Described roller core is spheroidal graphite cast-iron, and described preparation method comprises the steps:
1) molten steel of skin of the roll high-speed steel: the batching mixing is put into vaccum sensitive stove and be heated to 1710-1730 ℃, insulation 10-20 minute, make composition and the temperature of high-speed steel melt in induction furnace reach uniformity, then high-speed steel melt is poured in heated tundish, the temperature of tundish is 1700-1720 ℃;
2) prepare composite roll: first high-speed steel molten steel is poured in the casting mold rotating on centrifuge, casting mold rotating speed is 530-550 rev/min, pouring molten steel temperature is 1530 ℃-1560 ℃; Outer pouring molten steel is complete, keeps casting mold to continue rotation after 10-20 minute, measures outer internal surface temperature with contactless temperature-measuring instrument, in the time that temperature is 1230 ℃-1290 ℃, casting mold is erect, filled in roller core molten ductile cast iron to centre, molten steel pouring temperature is 1330 ℃-1360 ℃;
3) heat treatment: roll surface temperature is during lower than 300 ℃, roll blank is placed in and in heating furnace, carries out stress relief annealing processing, heating-up temperature 350-450 ℃, temperature retention time 10-12 hour, then stove is chilled to temperature lower than 200 ℃, come out of the stove air cooling to room temperature, be finally machined to given size and precision.
The design principle of the chemical composition of the outer high-speed steel of the present invention is:
Carbon: add carbon and boron, be partially soluble in matrix, improve matrix hardenability and quenching degree, part forms the carbon compound of high rigidity, be conducive to improve roll wearability, addition is very few, and roll hardness is low, wears no resistance, addition is too much, and fragility is large, easy to crack and peel off in use.
Chromium: the object that adds chromium is to improve the quenching degree of matrix, and in addition, chromium can also improve the antioxygenic property of roll, chromium can also prevent that in roll use, coarsening phenomenon appears in surface, is conducive to improve stocking surface quality.Molybdenum, tungsten: the main additional element of high-speed steel, Main Function is the primary carbide that is difficult to dissolving that forms some, makes steel can approach the quench hot of fusing point, and improves the wearability of steel; Obtain after the martensite of high W (Mo) M when tempering by high temperature solid solution
2c and MC precipitation form the proeutectoid carbide of sufficient amount, are the principal elements of post-curing and red hardness.
Vanadium and nitrogen: the main additional element of vanadium high-speed steel, the disperse of the MC precipitate of V to the coherent post-curing effect that plays of the forming section conclusive effect that distributed.The vanadium adding in the present invention and nitrogen combination, substitute expensive cobalt element, forms the compound of the two, can improve secondary hardness, red hardness and the wearability of steel.Niobium and titanium: carbide, form MC type carbide, can be used to part and replace V or W, the content of V is down to the level that only keeps post-curing.Utilize Nb to increase MC type carbide in steel, thereby strengthen the wearability of steel.
The present invention has following beneficial effect:
1) in the outer high-speed steel of the present invention, do not add expensive cobalt element, by the combination replacement cobalt element with vanadium and nitrogen, and the addition of W, M, V is also low than prior art, thereby significantly reduces costs, and plays the technique effect same with adding cobalt element.
2) skin of the roll high-speed steel hardness of cast form of the present invention is greater than 91HSD, and after stress relief annealing, hardness maintains 88-90HSD, and the spheroidal graphite cast-iron of roller core has kept certain obdurability.Not easy to wear when roll is used, cracking, occur without peeling off with roll breakage phenomenon, improve 3～5 times than high Ni-Cr infinite cold hardness cast iron roll service life, improves 20～25% than high carbon and vanadium high speed steel roll.
The specific embodiment
Embodiment mono-
Skin is a preparation method for the composite roll of high-speed steel, and this composite roll comprises skin and roller core, and described outer field chemical composition is: C 1.5%, Cr 9.8%, Mo 4.8%, W 3.5%, V 1.3%, Nb 1.0%, Ti 0.2%, Si 0.7%, Mn 0.1%, N 0.1%, S≤0.03%, P≤0.03%, all the other are Fe and inevitable impurity; Described roller core is spheroidal graphite cast-iron, and described preparation method comprises the steps:
1) molten steel of skin of the roll high-speed steel: the batching mixing is put into vaccum sensitive stove and be heated to 1710 ℃, be incubated 20 minutes, make composition and the temperature of high-speed steel melt in induction furnace reach uniformity, then high-speed steel melt is poured in heated tundish, the temperature of tundish is 1700 ℃;
2) prepare composite roll: first high-speed steel molten steel is poured in the casting mold rotating, casting mold rotating speed is 530 revs/min, and pouring molten steel temperature is 1560 ℃ on centrifuge; Outer pouring molten steel is complete, keeps casting mold to continue rotation after 10 minutes, measures outer internal surface temperature with contactless temperature-measuring instrument, in the time that temperature is 1290 ℃, casting mold is erect, and fills in roller core molten ductile cast iron to centre, and molten steel pouring temperature is 1330 ℃;
3) heat treatment: roll surface temperature is during lower than 300 ℃, is placed in roll blank in heating furnace, to carry out stress relief annealing processing, 350 ℃ of heating-up temperatures, temperature retention time 12 hours, then stove is chilled to temperature lower than 200 ℃, and the air cooling of coming out of the stove, to room temperature, is finally machined to given size and precision.
Embodiment bis-
Skin is a preparation method for the composite roll of high-speed steel, and this composite roll comprises skin and roller core, and described outer field chemical composition is: C 1.7%, Cr 9.4%, Mo 5.2%, W 2.5%, V 1.7%, Nb 0.6%, Ti 0.4%, Si 0.5%, Mn 0.3%, N 0.06%, S≤0.03%, P≤0.03%, all the other are Fe and inevitable impurity; Described roller core is spheroidal graphite cast-iron, and described preparation method comprises the steps:
1) molten steel of skin of the roll high-speed steel: the batching mixing is put into vaccum sensitive stove and be heated to 1730 ℃, be incubated 10 minutes, make composition and the temperature of high-speed steel melt in induction furnace reach uniformity, then high-speed steel melt is poured in heated tundish, the temperature of tundish is 1720 ℃;
2) prepare composite roll: first high-speed steel molten steel is poured in the casting mold rotating, casting mold rotating speed is 550 revs/min, and pouring molten steel temperature is 1530 ℃ on centrifuge; Outer pouring molten steel is complete, keeps casting mold to continue rotation after 20 minutes, measures outer internal surface temperature with contactless temperature-measuring instrument, in the time that temperature is 1230 ℃, casting mold is erect, and fills in roller core molten ductile cast iron to centre, and molten steel pouring temperature is 1360 ℃;
3) heat treatment: roll surface temperature is during lower than 300 ℃, is placed in roll blank in heating furnace, to carry out stress relief annealing processing, 450 ℃ of heating-up temperatures, temperature retention time 10 hours, then stove is chilled to temperature lower than 200 ℃, and the air cooling of coming out of the stove, to room temperature, is finally machined to given size and precision.
Embodiment tri-
Skin is a preparation method for the composite roll of high-speed steel, and this composite roll comprises skin and roller core, and described outer field chemical composition is: C 1.6%, Cr 9.6%, Mo 5.0%, W 3.0%, V 1.5%, Nb 0.8%, Ti 0.3%, Si 0.6%, Mn 0.2%, N 0.08%, S≤0.03%, P≤0.03%, all the other are Fe and inevitable impurity; Described roller core is spheroidal graphite cast-iron, and described preparation method comprises the steps:
1) molten steel of skin of the roll high-speed steel: the batching mixing is put into vaccum sensitive stove and be heated to 1720 ℃, be incubated 15 minutes, make composition and the temperature of high-speed steel melt in induction furnace reach uniformity, then high-speed steel melt is poured in heated tundish, the temperature of tundish is 1710 ℃;
2) prepare composite roll: first high-speed steel molten steel is poured in the casting mold rotating, casting mold rotating speed is 540 revs/min, and pouring molten steel temperature is 1545 ℃ on centrifuge; Outer pouring molten steel is complete, keeps casting mold to continue rotation after 15 minutes, measures outer internal surface temperature with contactless temperature-measuring instrument, in the time that temperature is 1260 ℃, casting mold is erect, and fills in roller core molten ductile cast iron to centre, and molten steel pouring temperature is 1345 ℃;
3) heat treatment: roll surface temperature is during lower than 300 ℃, is placed in roll blank in heating furnace, to carry out stress relief annealing processing, 400 ℃ of heating-up temperatures, temperature retention time 11 hours, then stove is chilled to temperature lower than 200 ℃, and the air cooling of coming out of the stove, to room temperature, is finally machined to given size and precision.
Claims (1)
1. a preparation method for the composite roll that skin is high-speed steel, is characterized in that, this composite roll comprises skin and roller core, described outer field chemical composition is: C 1.5-1.7%, Cr 9.4-9.8%, Mo 4.8-5.2%, W 2.5-3.5%, V 1.3-1.7%, Nb 0.6-1.0%, Ti 0.2-0.4%, Si 0.5-0.7%, Mn 0.1-0.3%, N 0.06-0.1%, S≤0.03%, P≤0.03%, all the other are Fe and inevitable impurity; Described roller core is spheroidal graphite cast-iron, and described preparation method comprises the steps:
1) molten steel of skin of the roll high-speed steel: the batching mixing is put into vaccum sensitive stove and be heated to 1710-1730 ℃, insulation 10-20 minute, make composition and the temperature of high-speed steel melt in induction furnace reach uniformity, then high-speed steel melt is poured in heated tundish, the temperature of tundish is 1700-1720 ℃;
2) prepare composite roll: first high-speed steel molten steel is poured in the casting mold rotating on centrifuge, casting mold rotating speed is 530-550 rev/min, pouring molten steel temperature is 1530 ℃-1560 ℃; Outer pouring molten steel is complete, keeps casting mold to continue rotation after 10-20 minute, measures outer internal surface temperature with contactless temperature-measuring instrument, in the time that temperature is 1230 ℃-1290 ℃, casting mold is erect, filled in roller core molten ductile cast iron to centre, molten steel pouring temperature is 1330 ℃-1360 ℃;
3) heat treatment: roll surface temperature is during lower than 300 ℃, roll blank is placed in and in heating furnace, carries out stress relief annealing processing, heating-up temperature 350-450 ℃, temperature retention time 10-12 hour, then stove is chilled to temperature lower than 200 ℃, come out of the stove air cooling to room temperature, be finally machined to given size and precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422938.3A CN103785815A (en) | 2012-10-29 | 2012-10-29 | Manufacturing method of composite roll with outer layer made of high-speed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422938.3A CN103785815A (en) | 2012-10-29 | 2012-10-29 | Manufacturing method of composite roll with outer layer made of high-speed steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103785815A true CN103785815A (en) | 2014-05-14 |
Family
ID=50662106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210422938.3A Pending CN103785815A (en) | 2012-10-29 | 2012-10-29 | Manufacturing method of composite roll with outer layer made of high-speed steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103785815A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001905A (en) * | 2014-06-16 | 2014-08-27 | 枣庄瑞兴机械制造有限公司 | Abrasion-resistance casting high-speed steel composite roller and manufacturing method thereof |
| CN107794350A (en) * | 2017-10-13 | 2018-03-13 | 重庆派斯克刀具制造股份有限公司 | A kind of H.S.S. production technique |
| CN107866306A (en) * | 2017-11-14 | 2018-04-03 | 成都利君实业股份有限公司 | A kind of stud formula Roller of High and its production method |
| CN110387506A (en) * | 2019-07-25 | 2019-10-29 | 唐山市国宗元裕龙重工有限公司 | High abrasion centrifugal compound high-speed steel roll |
| CN112743064A (en) * | 2020-12-29 | 2021-05-04 | 唐山先隆轧辊实业有限公司 | High-nitrogen high-speed steel centrifugal composite roller and preparation process thereof |
| CN113846276A (en) * | 2021-08-30 | 2021-12-28 | 河北工业大学 | High-strength high-speed steel containing Zr element and preparation method thereof |
-
2012
- 2012-10-29 CN CN201210422938.3A patent/CN103785815A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001905A (en) * | 2014-06-16 | 2014-08-27 | 枣庄瑞兴机械制造有限公司 | Abrasion-resistance casting high-speed steel composite roller and manufacturing method thereof |
| CN104001905B (en) * | 2014-06-16 | 2016-04-13 | 枣庄瑞兴机械制造有限公司 | A kind of abrasion-resistant cast compound high speed steel roll and preparation method thereof |
| CN107794350A (en) * | 2017-10-13 | 2018-03-13 | 重庆派斯克刀具制造股份有限公司 | A kind of H.S.S. production technique |
| CN107866306A (en) * | 2017-11-14 | 2018-04-03 | 成都利君实业股份有限公司 | A kind of stud formula Roller of High and its production method |
| CN107866306B (en) * | 2017-11-14 | 2019-06-18 | 成都利君实业股份有限公司 | A kind of stud formula Roller of High and its production method |
| CN110387506A (en) * | 2019-07-25 | 2019-10-29 | 唐山市国宗元裕龙重工有限公司 | High abrasion centrifugal compound high-speed steel roll |
| CN112743064A (en) * | 2020-12-29 | 2021-05-04 | 唐山先隆轧辊实业有限公司 | High-nitrogen high-speed steel centrifugal composite roller and preparation process thereof |
| CN112743064B (en) * | 2020-12-29 | 2022-07-12 | 唐山先隆轧辊实业有限公司 | High-nitrogen high-speed steel centrifugal composite roller and preparation process thereof |
| CN113846276A (en) * | 2021-08-30 | 2021-12-28 | 河北工业大学 | High-strength high-speed steel containing Zr element and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100485075C (en) | High-carbon high-vanadium high-speed steel composite roller and heat treatment method thereof | |
| CN105618715B (en) | A kind of wear-resistant high speed steel composite roll and preparation method thereof | |
| CN103866200B (en) | High-boron high-speed steel combined roller and manufacturing 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 | |
| CN100404152C (en) | High speed steel composite roll and its preparing method | |
| CN103624084B (en) | Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof | |
| CN100369681C (en) | Compound high speed steel roll and its making process | |
| CN101831590B (en) | High-boron low-alloy high-speed steel roll and preparation method thereof | |
| CN103014516B (en) | Borated low-alloy high-speed steel roller and manufacturing method thereof | |
| CN105750529B (en) | A kind of high tungsten high abrasion compound high speed steel roll and preparation method thereof | |
| CN103526125B (en) | A kind of semisteel roll and manufacture method thereof | |
| CN100574910C (en) | Centrifugal casting half steel/steel/graphite steel composite roll collar and preparation method thereof | |
| CN102409267B (en) | Boron-containing high speed steel roller and preparation method thereof | |
| CN105568136B (en) | Middle plate high chromium steel roller and its manufacture method | |
| CN103785815A (en) | Manufacturing method of composite roll with outer layer made of high-speed steel | |
| CN107119222B (en) | Centrifugal composite casting Cr8 alloy cast steels backing roll and manufacturing process | |
| JP6205126B2 (en) | Method for producing austempered spheroidal graphite cast iron article | |
| CN104264043A (en) | Wear-resisting and high-speed centrifugally cast steel composite roll and preparation method thereof | |
| CN105755379B (en) | Wear-resistant high speed steel collars for kocks milling trains and preparation method thereof | |
| CN104388812A (en) | High-speed steel composite roller for rods/wires and preparation method of high-speed steel composite roller | |
| CN102864372A (en) | Wear-resisting rolling mill guide and guard and manufacture method thereof | |
| CN101705430A (en) | High-speed steel roll and preparation method thereof by centrifugal compounding in electromagnetic field | |
| CN102107215A (en) | Resource-saving boron-containing high-speed steel composite roll and preparation method thereof | |
| CN101773935B (en) | High speed steel compound roll and manufacture method thereof | |
| CN103014532A (en) | High-abrasion-resistance composite roller and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140514 |