CN112030064A - High wear-resistant eighteen-roller mill working roller - Google Patents
High wear-resistant eighteen-roller mill working roller Download PDFInfo
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- CN112030064A CN112030064A CN202010853830.4A CN202010853830A CN112030064A CN 112030064 A CN112030064 A CN 112030064A CN 202010853830 A CN202010853830 A CN 202010853830A CN 112030064 A CN112030064 A CN 112030064A
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- tempering
- eighteen
- forging
- quenching
- high wear
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
Abstract
The high-wear-resistance eighteen-roller mill working roller comprises the following components in percentage by weight: 0.5 to 0.9%, silicon: 0.5-1.2%, manganese: 0.2-0.5%, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.02 percent, cadmium: 1.7-3.5%, molybdenum: 0.3-0.7%, vanadium: 0.08-0.27%, Cr: 5.6-7.5%, and the balance of iron and inevitable impurities. The improved material is adopted, and the process is optimized to obtain the high-hardness and high-wear-resistance two intermediate rolls so as to achieve the long-term service and accident resistance of the rolls, the overall hardness can reach 92-96 HSD, the overall hardness uniformity is less than or equal to 1HSD, the wear resistance is improved by 3 times compared with that of the traditional working roll, the toughness is improved by 2 times, the overall cost performance is high, the use cost is lower, and the environment-friendly effect is achieved.
Description
Technical Field
The invention belongs to the field of rollers and production of the rollers, and particularly relates to an eighteen-roller mill working roller with high hardness, high wear resistance and high toughness.
Background
The eighteen-roller rolling mill has large rolling force, and particularly, the working roller of the large medium plate rolling mill has to ensure the plate surface quality and requires the working roller to have high tensile strength and fatigue strength; the eighteen-roller mill working roller and a rolled steel plate have relative sliding phenomenon in the rolling process, so that the abrasion and the bad plate shape of the roller are caused, and the roller is required to have high hardness and abrasion resistance; in the rolling process, the working roll works under high pressure, high temperature, cooling water and alternating load, and the repeated pressure stress and tensile stress of the working roll can induce the generation of heat cracks, so that the working roll is required to have high thermal conductivity, small thermal expansion coefficient and elastic coefficient; in addition, since the work rolls are subjected to high fatigue strength at high temperatures, the structure of the rolls is stabilized at high temperatures.
At present, the same kind of rollers at home and abroad are made of 5H12 materials, the required hardness is achieved through integral heat treatment, the silicon steel kilometers are rolled at one time, and the rollers have the defects of poor fatigue resistance, peeling and the like in different degrees, so that the development of the high-performance high-cost-performance high-wear-resistance eighteen-roller mill working roller is urgently needed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provide the high-wear-resistance and high-toughness working roll of the eighteen-roller rolling mill, which has the advantages that the overall hardness can reach 92-96 HSD, the overall hardness uniformity is less than or equal to 1HSD, the service life is long, and the wear resistance is improved by more than 3 times compared with that of the traditional working roll.
The technical scheme is as follows: in order to solve the technical problem, the high-wear-resistance eighteen-roller mill working roller comprises the following components in percentage by weight: 0.5 to 0.9%, silicon: 0.5-1.2%, manganese: 0.2-0.5%, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.02 percent, cadmium: 1.7-3.5%, molybdenum: 0.3-0.7%, vanadium: 0.08-0.27%, Cr: 5.6-7.5%, and the balance of iron and inevitable impurities;
the preparation method comprises the following steps of,
(1) the raw materials are put into an induction furnace to be smelted according to the content proportion of each alloy element, the smelting temperature is 1560-1720 ℃, casting into ingots, electroslag remelting, forging and molding to prepare rough blanks,
(2) forging and spheroidizing annealing the rough blank to obtain a steel blank,
(3) rough turning and modulating the billet, and performing ultrasonic flaw detection after finishing
(4) Quenching heat treatment is carried out on the steel billet, the quenching temperature is 1150-1260 ℃,
(5) tempering the steel billet at 520-570 ℃.
(6) And performing finish machining on the tempered steel billet, and performing ultrasonic surface wave detection and flaw detection after the machining is finished.
Preferably, in the step (1), the forging forming is a repeated upsetting and drawing process, and the forging ratio of each upsetting to each drawing is 6.9-7.3.
Preferably, the quenching and tempering treatment in the step (3) is to heat the billet to 1120-1200 ℃ and then preserve heat for 3.2-4 h.
Preferably, the temperature of the quenching heat treatment in the step (4) is 1150-1260 ℃, and the quenching heat treatment is cooled by adopting an air cooling mode.
Preferably, the tempering temperature of the tempering treatment in the step (5) is 520-570 ℃, the tempering times are 2-4 times, and the heat preservation time of each tempering is 30-40 hours.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the improved material is adopted, and the process is optimized to obtain the high-hardness and high-wear-resistance two intermediate rolls so as to achieve the long-term service and accident resistance of the rolls, the overall hardness can reach 92-96 HSD, the overall hardness uniformity is less than or equal to 1HSD, the wear resistance is improved by 3 times compared with that of the traditional working roll, the toughness is improved by 2 times, the overall cost performance is high, the use cost is lower, and the environment-friendly effect is achieved.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The invention relates to a high-wear-resistance eighteen-roller mill working roller, which comprises the following components in percentage by weight: 0.55%, silicon: 0.7%, manganese: 0.27%, phosphorus: 0.015%, sulfur: 0.012%, cadmium: 2.7%, molybdenum: 0.4%, vanadium: 0.17%, chromium: 6.5%, the balance being iron and unavoidable impurities;
the preparation method comprises the following steps of,
(1) the raw materials are put into an induction furnace to be smelted according to the content proportion of each alloy element, the smelting temperature is 1630 ℃, the raw materials are cast into ingots, electroslag remelting and forging forming are carried out to obtain rough blanks,
(2) forging and spheroidizing annealing the rough blank to obtain a steel blank,
(3) rough turning and modulating the billet, and performing ultrasonic flaw detection after finishing
(4) Quenching heat treatment is carried out on the steel billet, the quenching temperature is 1210 ℃,
(5) tempering the steel billet at 535 deg.c.
(6) And performing finish machining on the tempered steel billet, and performing ultrasonic surface wave detection and flaw detection after the machining is finished.
In the step (1), the forging and forging forming is a process of repeated upsetting and drawing, and the forging ratio of each upsetting and drawing is 6.9.
And (4) quenching and tempering in the step (3) is to heat the steel billet to 1180 ℃ and then preserve heat for 3.4 hours.
The temperature of the quenching heat treatment in the step (4) is 1210 ℃, and the quenching heat treatment is cooled by adopting an air cooling mode.
The tempering temperature of the tempering treatment in the step (5) is 535 ℃, the tempering times are 3 times, and the heat preservation time of each tempering is 34 h.
Example 2
The high-wear-resistance eighteen-roller mill working roller comprises the following components in percentage by weight: 0.63%, silicon: 0.9%, manganese: 0.31%, phosphorus: 0.021%, sulfur: 0.009%, cadmium: 2.3%, molybdenum: 0.56%, vanadium: 0.13%, chromium: 6.3%, the balance being iron and unavoidable impurities;
the preparation method comprises the following steps of,
(1) the raw materials are put into an induction furnace to be smelted according to the content proportion of each alloy element, the smelting temperature is 1670 ℃, casting is carried out to form ingots, electroslag remelting and forging forming are carried out to obtain rough blanks,
(2) forging and spheroidizing annealing the rough blank to obtain a steel blank,
(3) rough turning and modulating the billet, and performing ultrasonic flaw detection after finishing
(4) Carrying out quenching heat treatment on the steel billet, wherein the quenching temperature is 1240 ℃,
(5) tempering the steel billet at 560 ℃.
(6) And performing finish machining on the tempered steel billet, and performing ultrasonic surface wave detection and flaw detection after the machining is finished.
In the step (1), the forging and forging forming is a process of repeated upsetting and drawing, and the forging ratio of each upsetting and drawing is 7.1.
And (4) quenching and tempering in the step (3) is to heat the billet to 1160 ℃ and then preserve heat for 3.3 hours.
The temperature of the quenching heat treatment in the step (4) is 1240 ℃, and the quenching heat treatment is cooled by adopting an air cooling mode.
The tempering temperature of the tempering treatment in the step (5) is 560 ℃, the tempering times are 2 times, and the heat preservation time of each tempering is 39 hours.
Claims (5)
1. High wear-resisting eighteen high rolling mill working rolls, its characterized in that: the carbon comprises the following components in percentage by weight: 0.5 to 0.9%, silicon: 0.5-1.2%, manganese: 0.2-0.5%, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.02 percent, cadmium: 1.7-3.5%, molybdenum: 0.3-0.7%, vanadium: 0.08-0.27%, Cr: 5.6-7.5%, and the balance of iron and inevitable impurities;
the preparation method comprises the following steps of,
(1) the raw materials are put into an induction furnace to be smelted according to the content proportion of each alloy element, the smelting temperature is 1560-1720 ℃, casting into ingots, electroslag remelting, forging and molding to prepare rough blanks,
(2) forging and spheroidizing annealing the rough blank to obtain a steel blank,
(3) rough turning and modulating the billet, and performing ultrasonic flaw detection after finishing
(4) Quenching heat treatment is carried out on the steel billet, the quenching temperature is 1150-1260 ℃,
(5) tempering the steel billet at 520-570 ℃,
(6) and performing finish machining on the tempered steel billet, and performing ultrasonic surface wave detection and flaw detection after the machining is finished.
2. The high wear eighteen high mill work roll of claim 1, characterized in that: in the step (1), the forging and forging forming is a repeated upsetting and drawing process, and the forging ratio of each upsetting to each drawing is 6.9-7.3.
3. The high wear eighteen high mill work roll of claim 1, characterized in that: and (3) quenching and tempering, namely heating the steel billet to 1120-1200 ℃, and then preserving heat for 3.2-4 h.
4. The high wear eighteen high mill work roll of claim 1, characterized in that: the temperature of the quenching heat treatment in the step (4) is 1150-1260 ℃, and the quenching heat treatment is cooled by adopting an air cooling mode.
5. The high wear eighteen high mill work roll of claim 1, characterized in that: the tempering temperature of the tempering treatment in the step (5) is 520-570 ℃, the tempering times are 2-4 times, and the heat preservation time of each tempering is 30-40 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010853830.4A CN112030064A (en) | 2020-08-24 | 2020-08-24 | High wear-resistant eighteen-roller mill working roller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010853830.4A CN112030064A (en) | 2020-08-24 | 2020-08-24 | High wear-resistant eighteen-roller mill working roller |
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| Publication Number | Publication Date |
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| CN112030064A true CN112030064A (en) | 2020-12-04 |
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| CN202010853830.4A Pending CN112030064A (en) | 2020-08-24 | 2020-08-24 | High wear-resistant eighteen-roller mill working roller |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2855184A1 (en) * | 2003-05-19 | 2004-11-26 | Usinor | Fabrication of very high strength dual phase steel strip by hot and cold rolling and aluminising for the production of anti-implosion belts for television sets |
| CN102400048A (en) * | 2010-09-15 | 2012-04-04 | 宝山钢铁股份有限公司 | Cold work roll steel for high-strength steel rolling, cold work roll and its manufacturing method |
| CN104120342A (en) * | 2014-08-12 | 2014-10-29 | 江苏润孚机械轧辊制造有限公司 | Roll and preparation method thereof |
| CN105385959A (en) * | 2015-10-29 | 2016-03-09 | 中钢集团邢台机械轧辊有限公司 | High-wear-resisting cold roll and manufacturing method thereof |
-
2020
- 2020-08-24 CN CN202010853830.4A patent/CN112030064A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2855184A1 (en) * | 2003-05-19 | 2004-11-26 | Usinor | Fabrication of very high strength dual phase steel strip by hot and cold rolling and aluminising for the production of anti-implosion belts for television sets |
| CN102400048A (en) * | 2010-09-15 | 2012-04-04 | 宝山钢铁股份有限公司 | Cold work roll steel for high-strength steel rolling, cold work roll and its manufacturing method |
| CN104120342A (en) * | 2014-08-12 | 2014-10-29 | 江苏润孚机械轧辊制造有限公司 | Roll and preparation method thereof |
| CN105385959A (en) * | 2015-10-29 | 2016-03-09 | 中钢集团邢台机械轧辊有限公司 | High-wear-resisting cold roll and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 孙玮等: "《中厚板生产900问》", 31 July 2014, 冶金工业出版社 * |
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Application publication date: 20201204 |