CN104195456A - Special steel and processing technique of high-wear-resistance bearing - Google Patents
Special steel and processing technique of high-wear-resistance bearing Download PDFInfo
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- CN104195456A CN104195456A CN201410426447.5A CN201410426447A CN104195456A CN 104195456 A CN104195456 A CN 104195456A CN 201410426447 A CN201410426447 A CN 201410426447A CN 104195456 A CN104195456 A CN 104195456A
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Abstract
The invention discloses a special steel of a high-wear-resistance bearing. The blank comprises the following chemical components in percentage by mass: 0.21-0.23% of C, 0.07-0.09% of Si, 0.66-0.68% of Mn, 0.83-0.85% of Ni, 9.1-9.3% of Cr, 0.55-0.57% of Mo, 0.13-0.15% of V, 0.11-0.13% of Nb, 0.01-0.03% of Cu, 0.19-0.21% of Ti, 0.05-0.07% of B, at most 0.025% of S, at most 0.015% of P, 0.12-0.14% of rare-earth metal and the balance of Fe. The rare-earth metal comprises the following chemical components in percentage by mass: 2-4% of cerium, 11-13% of neodymium, 3-5% of gadolinium, 4-6% of lutetium, 5-7% of dysprosium, 1-3% of europium, 8-10% of erbium and the balance of lanthanum. The invention also discloses a processing technique of the high-wear-resistance bearing, which comprises the following steps: forging, annealing, tempering, turning, carburizing and heat treatment. The product has the characteristics of high working size precision, stable inherent quality, excellent properties, long service life and high reliability.
Description
Technical field
The invention belongs to mechanical transmissioning technology field, relate to a kind of special steel of high abrasion bearing, specifically a kind of special steel of high abrasion bearing and complete processing thereof.
Background technology
Bearing is a kind of very important component in contemporary mechanical means, it works to fix and reduce load frictional coefficient in mechanical transmission course, when other parts produce relative movement each other on axle, be used for reducing the fixing parts of frictional coefficient and retainer shaft central position in power transmission process, its major function is supported mechanical rotator, the mechanical load frictional coefficient in order to reduction equipment in transmission process.
At present in China, bearing industry production concentration degree is lower, and research and development and innovation ability are low, due to most enterprises at aspects such as the construction of innovation system and the fund input of operation, research and development and innovation, talents' tappings still in low-level, the scientific research institutions that add Industry Service move towards commercial running, country is the input to the research of industry common technology not, thereby has weakened the function that Industry-oriented is researched and developed.
Simultaneously; one of subject matter that manufacturing technology level Di Yeshi China bearing industry faces; China's bearing industry manufacturing process and equipment Technology slower development; Vehicle Processing numerical control rate is low; mill process automation level is low; especially to bearing life and the vital advanced thermal treatment process of reliability and equipment, as low in fraction of coverage such as controlled atmosphere protection heating, two refinement, bainitic hardenings, many technical barrier tackling key problem fail to make a breakthrough.The research and development of bearing steel new steel grade, the raising of steel product quality, the research and development of the correlation techniques such as lubricated, cooling, cleaning and grinding materials and grinding tool, still can not adapt to the requirement that bearing products level and quality improve.Thereby cause process capability index low, and consistence is poor, and product finish size plastisied dispersion is large, and product inner quality is unstable and affect precision, performance, the life and reliability of bearing.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, and a kind of special steel and complete processing thereof of high abrasion bearing is provided, and has accurate to dimension high, and product inner quality is stable, excellent performance, long service life, the feature that reliability is high.
In order to solve above technical problem, the invention provides a kind of special steel of high abrasion bearing, the mass percent of the chemical composition of its blank is: C:0.21-0.23%, Si:0.07-0.09%, Mn:0.66-0.68%, Ni:0.83-0.85%, Cr:9.1-9.3%, Mo:0.55-0.57%, V:0.13-0.15%, Nb:0.11-0.13%, Cu:0.01-0.03%, Ti:0.19-0.21%, B:0.05-0.07%, S≤0.025%, P≤0.015%, rare earth metal: 0.12-0.14%, surplus is Fe.
Wherein, the chemical composition mass percent of rare earth metal is: cerium: 2-4%, and neodymium: 11-13%, gadolinium: 3-5%, lutetium: 4-6%, dysprosium: 5-7%, europium: 1-3%, erbium: 8-10%, surplus is lanthanum.
The technical scheme that the present invention further limits is: a kind of special steel of high abrasion bearing is provided, and the mass percent of the chemical composition of its blank is: C:0.21%, Si:0.07%, Mn:0.66%, Ni:0.83%, Cr:9.1%, Mo:0.55%, V:0.13%, Nb:0.11%, Cu:0.01%, Ti:0.19%, B:0.05%, S:0.025%, P:0.015%, rare earth metal: 0.12%, surplus is Fe;
Wherein, the chemical composition mass percent of rare earth metal is: cerium: 4%, and neodymium: 13%, gadolinium: 5%, lutetium: 6%, dysprosium: 7%, europium: 3%, erbium: 10%, surplus is lanthanum.
A kind of special steel of high abrasion bearing is also provided, and the mass percent of the chemical composition of its blank is: C:0.23%, Si:0.09%, Mn:0.68%, Ni:0.85%, Cr:9.3%, Mo:0.57%, V:0.15%, Nb:0.13%, Cu:0.03%, Ti:0.21%, B:0.07%, S:0.02%, P:0.01%, rare earth metal: 0.14%, surplus is Fe;
Wherein, the chemical composition mass percent of rare earth metal is: cerium: 2%, and neodymium: 11%, gadolinium: 3%, lutetium: 4%, dysprosium: 5%, europium: 1%, erbium: 8%, surplus is lanthanum.
A kind of special steel of high abrasion bearing is also provided, and the mass percent of the chemical composition of its blank is: C:0.22%, Si:0.08%, Mn:0.67%, Ni:0.84%, Cr:9.2%, Mo:0.56%, V:0.14%, Nb:0.12%, Cu:0.02%, Ti:0.20%, B:0.06%, S:0.022%, P:0.013%, rare earth metal: 0.13%, surplus is Fe;
Wherein, the chemical composition mass percent of rare earth metal is: cerium: 3%, and neodymium: 12%, gadolinium: 4%, lutetium: 5%, dysprosium: 6%, europium: 2%, erbium: 9%, surplus is lanthanum.
The invention provides a kind of complete processing of high abrasion bearing, comprise forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment:
Forging process: workpiece blank is remained at 830-850 ℃, carry out flat-die forging, the time is 16-18 minute;
Annealing operation: after forge hot, at 785-795 ℃ of insulation 10-12 minute, then stove is incubated 6-8 minute after being chilled to 235-245 ℃, is finally cooled to room temperature;
Tempering process: tempering temperature 715-725 ℃ is incubated 8-10min after temperature, and then air cooling is to room temperature;
Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 935-945 ℃, insulation 15-17 minute;
Heat treatment step: thermal treatment temp 965-975 ℃ is incubated 5-7 minute after temperature, then adopts water-cooled, with the rate of cooling of 1-3 ℃/s, coarse fodder is cooled to room temperature.
The invention provides a kind of complete processing of high abrasion bearing, comprise forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment:
Forging process: workpiece blank is remained at 830 ℃, carry out flat-die forging, the time is 18 minutes;
Annealing operation: after forge hot, 785 ℃ of insulations 12 minutes, then stove was incubated 8 minutes after being chilled to 235 ℃, is finally cooled to room temperature;
Tempering process: 715 ℃ of tempering temperatures, after temperature, be incubated 10min, then air cooling is to room temperature;
Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 935 ℃, be incubated 17 minutes;
Heat treatment step: 965 ℃ of thermal treatment temps, after temperature, be incubated 7 minutes, then adopt water-cooled, with the rate of cooling of 1 ℃/s, coarse fodder is cooled to room temperature.
The invention provides a kind of complete processing of high abrasion bearing, comprise forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment:
Forging process: workpiece blank is remained at 850 ℃, carry out flat-die forging, the time is 16 minutes;
Annealing operation: after forge hot, 795 ℃ of insulations 10 minutes, then stove was incubated 6 minutes after being chilled to 245 ℃, is finally cooled to room temperature;
Tempering process: 725 ℃ of tempering temperatures, after temperature, be incubated 8min, then air cooling is to room temperature;
Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 945 ℃, be incubated 15 minutes;
Heat treatment step: 975 ℃ of thermal treatment temps, after temperature, be incubated 5 minutes, then adopt water-cooled, with the rate of cooling of 3 ℃/s, coarse fodder is cooled to room temperature.
The invention provides a kind of complete processing of high abrasion bearing, comprise forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment:
Forging process: workpiece blank is remained at 840 ℃, carry out flat-die forging, the time is 17 minutes;
Annealing operation: after forge hot, 790 ℃ of insulations 11 minutes, then stove was incubated 7 minutes after being chilled to 240 ℃, is finally cooled to room temperature;
Tempering process: 720 ℃ of tempering temperatures, after temperature, be incubated 9min, then air cooling is to room temperature;
Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 940 ℃, be incubated 16 minutes;
Heat treatment step: 970 ℃ of thermal treatment temps, after temperature, be incubated 6 minutes, then adopt water-cooled, with the rate of cooling of 2 ℃/s, coarse fodder is cooled to room temperature.
The invention has the beneficial effects as follows:
Cr in composition of the present invention can cause the macrosegregation of carbon and alloying element, and bearing there will be eutectic carbides, thereby reduces the impact toughness of bearing; The present invention, by adding rare earth metal, can effectively weaken the segregation phenomenon of bearing, can increase substantially the impact toughness of bearing.
Annealing operation of the present invention is not cooling immediately after forge hot, but at 785-795 ℃ of insulation 10-12 minute, the then cold rear insulation of stove, is finally cooled to room temperature; Make like this austenite at this temperature, carry out isothermal transformation, form perlite, Ovshinsky physical efficiency completes the transformation of ball light body within a short period of time, avoids forming martensite, causes steel hardening, thereby makes bearing hardness reach ideal effect, is unlikely to much higher hard or too low.
Bearing of the present invention is due to the effect of alloying element, the macrosegregation of carbon and alloying element, and bearing there will be eutectic carbides, thereby reduces the impact toughness of bearing; The present invention controls by a tempering and temperature, thereby the segregation phenomenon of bearing is obviously weakened, and can increase substantially the impact toughness of bearing.
Temper makes bearing all directions fine microstructures even; Can further reduce the poor of surface and the temperature of heart portion, thereby make surperficially to reach unanimity to heart portion performance; Cooling after tempering, can make to organize more uniform and stable, seldom there is pore and trachoma, guaranteed the corrosion resistance of bearing, played beyond thought technique effect.
The present invention can crystal grain thinning by surface strengthening thermal treatment, improve the toughness of bearing simultaneously, can alleviate or eliminate the defects such as banded structure, improve bearing integral impact property, bearing is organized more uniform and stable, seldom there is pore and trachoma, and obtain good comprehensive mechanical property and corrosion resistance.
Embodiment
embodiment 1
The present embodiment provides a kind of special steel of high abrasion bearing, and the mass percent of the chemical composition of its blank is: C:0.21%, Si:0.07%, Mn:0.66%, Ni:0.83%, Cr:9.1%, Mo:0.55%, V:0.13%, Nb:0.11%, Cu:0.01%, Ti:0.19%, B:0.05%, S:0.025%, P:0.015%, rare earth metal: 0.12%, surplus is Fe;
Wherein, the chemical composition mass percent of rare earth metal is: cerium: 4%, and neodymium: 13%, gadolinium: 5%, lutetium: 6%, dysprosium: 7%, europium: 3%, erbium: 10%, surplus is lanthanum.
The present embodiment also provides a kind of complete processing of high abrasion bearing, comprises forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment:
Forging process: workpiece blank is remained at 830 ℃, carry out flat-die forging, the time is 18 minutes;
Annealing operation: after forge hot, 785 ℃ of insulations 12 minutes, then stove was incubated 8 minutes after being chilled to 235 ℃, is finally cooled to room temperature;
Tempering process: 715 ℃ of tempering temperatures, after temperature, be incubated 10min, then air cooling is to room temperature;
Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 935 ℃, be incubated 17 minutes;
Heat treatment step: 965 ℃ of thermal treatment temps, after temperature, be incubated 7 minutes, then adopt water-cooled, with the rate of cooling of 1 ℃/s, coarse fodder is cooled to room temperature.
embodiment 2
The present embodiment provides a kind of special steel of high abrasion bearing, and the mass percent of the chemical composition of its blank is: C:0.23%, Si:0.09%, Mn:0.68%, Ni:0.85%, Cr:9.3%, Mo:0.57%, V:0.15%, Nb:0.13%, Cu:0.03%, Ti:0.21%, B:0.07%, S:0.02%, P:0.01%, rare earth metal: 0.14%, surplus is Fe;
Wherein, the chemical composition mass percent of rare earth metal is: cerium: 2%, and neodymium: 11%, gadolinium: 3%, lutetium: 4%, dysprosium: 5%, europium: 1%, erbium: 8%, surplus is lanthanum.
The present embodiment also provides a kind of complete processing of high abrasion bearing, comprises forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment:
Forging process: workpiece blank is remained at 850 ℃, carry out flat-die forging, the time is 16 minutes;
Annealing operation: after forge hot, 795 ℃ of insulations 10 minutes, then stove was incubated 6 minutes after being chilled to 245 ℃, is finally cooled to room temperature;
Tempering process: 725 ℃ of tempering temperatures, after temperature, be incubated 8min, then air cooling is to room temperature;
Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 945 ℃, be incubated 15 minutes;
Heat treatment step: 975 ℃ of thermal treatment temps, after temperature, be incubated 5 minutes, then adopt water-cooled, with the rate of cooling of 3 ℃/s, coarse fodder is cooled to room temperature.
embodiment 3
The present embodiment provides a kind of special steel of high abrasion bearing, and the mass percent of the chemical composition of its blank is: C:0.22%, Si:0.08%, Mn:0.67%, Ni:0.84%, Cr:9.2%, Mo:0.56%, V:0.14%, Nb:0.12%, Cu:0.02%, Ti:0.20%, B:0.06%, S:0.022%, P:0.013%, rare earth metal: 0.13%, surplus is Fe;
Wherein, the chemical composition mass percent of rare earth metal is: cerium: 3%, and neodymium: 12%, gadolinium: 4%, lutetium: 5%, dysprosium: 6%, europium: 2%, erbium: 9%, surplus is lanthanum.
The present embodiment also provides a kind of complete processing of high abrasion bearing, comprises forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment:
Forging process: workpiece blank is remained at 840 ℃, carry out flat-die forging, the time is 17 minutes;
Annealing operation: after forge hot, 790 ℃ of insulations 11 minutes, then stove was incubated 7 minutes after being chilled to 240 ℃, is finally cooled to room temperature;
Tempering process: 720 ℃ of tempering temperatures, after temperature, be incubated 9min, then air cooling is to room temperature;
Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 940 ℃, be incubated 16 minutes;
Heat treatment step: 970 ℃ of thermal treatment temps, after temperature, be incubated 6 minutes, then adopt water-cooled, with the rate of cooling of 2 ℃/s, coarse fodder is cooled to room temperature.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection domain of the present invention.
Claims (9)
1. a special steel for high abrasion bearing, is characterized in that, the mass percent of the chemical composition of its blank is: C:0.21-0.23%, Si:0.07-0.09%, Mn:0.66-0.68%, Ni:0.83-0.85%, Cr:9.1-9.3%, Mo:0.55-0.57%, V:0.13-0.15%, Nb:0.11-0.13%, Cu:0.01-0.03%, Ti:0.19-0.21%, B:0.05-0.07%, S≤0.025%, P≤0.015%, rare earth metal: 0.12-0.14%, surplus is Fe.
2. the special steel of high abrasion bearing as claimed in claim 1, is characterized in that: the chemical composition mass percent of described rare earth metal is: cerium: 2-4%, neodymium: 11-13%, gadolinium: 3-5%, lutetium: 4-6%, dysprosium: 5-7%, europium: 1-3%, erbium: 8-10%, surplus is lanthanum.
3. the special steel of high abrasion bearing as claimed in claim 2, is characterized in that, the mass percent of the chemical composition of its blank is: C:0.21%, Si:0.07%, Mn:0.66%, Ni:0.83%, Cr:9.1%, Mo:0.55%, V:0.13%, Nb:0.11%, Cu:0.01%, Ti:0.19%, B:0.05%, S:0.025%, P:0.015%, rare earth metal: 0.12%, surplus is Fe;
The chemical composition mass percent of described rare earth metal is: cerium: 4%, and neodymium: 13%, gadolinium: 5%, lutetium: 6%, dysprosium: 7%, europium: 3%, erbium: 10%, surplus is lanthanum.
4. the special steel of high abrasion bearing as claimed in claim 2, is characterized in that, the mass percent of the chemical composition of its blank is: C:0.23%, Si:0.09%, Mn:0.68%, Ni:0.85%, Cr:9.3%, Mo:0.57%, V:0.15%, Nb:0.13%, Cu:0.03%, Ti:0.21%, B:0.07%, S:0.02%, P:0.01%, rare earth metal: 0.14%, surplus is Fe;
The chemical composition mass percent of described rare earth metal is: cerium: 2%, and neodymium: 11%, gadolinium: 3%, lutetium: 4%, dysprosium: 5%, europium: 1%, erbium: 8%, surplus is lanthanum.
5. the special steel of high abrasion bearing as claimed in claim 2, is characterized in that, the mass percent of the chemical composition of its blank is: C:0.22%, Si:0.08%, Mn:0.67%, Ni:0.84%, Cr:9.2%, Mo:0.56%, V:0.14%, Nb:0.12%, Cu:0.02%, Ti:0.20%, B:0.06%, S:0.022%, P:0.013%, rare earth metal: 0.13%, surplus is Fe;
The chemical composition mass percent of described rare earth metal is: cerium: 3%, and neodymium: 12%, gadolinium: 4%, lutetium: 5%, dysprosium: 6%, europium: 2%, erbium: 9%, surplus is lanthanum.
6. the complete processing of high abrasion bearing as claimed in claim 1 or 2, comprises forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment, it is characterized in that:
Described forging process: workpiece blank is remained at 830-850 ℃, carry out flat-die forging, the time is 16-18 minute;
Described annealing operation: after forge hot, at 785-795 ℃ of insulation 10-12 minute, then stove is incubated 6-8 minute after being chilled to 235-245 ℃, is finally cooled to room temperature;
Described tempering process: tempering temperature 715-725 ℃ is incubated 8-10min after temperature, and then air cooling is to room temperature;
Described Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Described carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 935-945 ℃, insulation 15-17 minute;
Described heat treatment step: thermal treatment temp 965-975 ℃ is incubated 5-7 minute after temperature, then adopts water-cooled, with the rate of cooling of 1-3 ℃/s, coarse fodder is cooled to room temperature.
7. the complete processing of high abrasion bearing as claimed in claim 6, comprises forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment, it is characterized in that:
Described forging process: workpiece blank is remained at 830 ℃, carry out flat-die forging, the time is 18 minutes;
Described annealing operation: after forge hot, 785 ℃ of insulations 12 minutes, then stove was incubated 8 minutes after being chilled to 235 ℃, is finally cooled to room temperature;
Described tempering process: 715 ℃ of tempering temperatures, after temperature, be incubated 10min, then air cooling is to room temperature;
Described Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Described carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 935 ℃, be incubated 17 minutes;
Described heat treatment step: 965 ℃ of thermal treatment temps, after temperature, be incubated 7 minutes, then adopt water-cooled, with the rate of cooling of 1 ℃/s, coarse fodder is cooled to room temperature.
8. the complete processing of high abrasion bearing as claimed in claim 6, comprises forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment, it is characterized in that:
Described forging process: workpiece blank is remained at 850 ℃, carry out flat-die forging, the time is 16 minutes;
Described annealing operation: after forge hot, 795 ℃ of insulations 10 minutes, then stove was incubated 6 minutes after being chilled to 245 ℃, is finally cooled to room temperature;
Described tempering process: 725 ℃ of tempering temperatures, after temperature, be incubated 8min, then air cooling is to room temperature;
Described Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Described carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 945 ℃, be incubated 15 minutes;
Described heat treatment step: 975 ℃ of thermal treatment temps, after temperature, be incubated 5 minutes, then adopt water-cooled, with the rate of cooling of 3 ℃/s, coarse fodder is cooled to room temperature.
9. the complete processing of high abrasion bearing as claimed in claim 6, comprises forging, annealing, tempering, Vehicle Processing, carburizing and thermal treatment, it is characterized in that:
Described forging process: workpiece blank is remained at 840 ℃, carry out flat-die forging, the time is 17 minutes;
Described annealing operation: after forge hot, 790 ℃ of insulations 11 minutes, then stove was incubated 7 minutes after being chilled to 240 ℃, is finally cooled to room temperature;
Described tempering process: 720 ℃ of tempering temperatures, after temperature, be incubated 9min, then air cooling is to room temperature;
Described Vehicle Processing operation: by cooled blank, adopt lathe in machining to become cylindrical coarse fodder;
Described carburization step: coarse fodder is inserted and had in activated carburizing medium, be heated to 940 ℃, be incubated 16 minutes;
Described heat treatment step: 970 ℃ of thermal treatment temps, after temperature, be incubated 6 minutes, then adopt water-cooled, with the rate of cooling of 2 ℃/s, coarse fodder is cooled to room temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018103080A1 (en) * | 2016-12-09 | 2018-06-14 | 张康 | High-carbon chromium bearing steel heat treatment process |
| CN112322988A (en) * | 2020-11-23 | 2021-02-05 | 浙江宝武钢铁有限公司 | High-wear-resistance bearing steel electroslag ingot and processing technology thereof |
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| JPS60238449A (en) * | 1984-05-14 | 1985-11-27 | Nippon Steel Corp | High tension steel having superior toughness at low temperature in welding heat-affected zone |
| JPH07278761A (en) * | 1994-04-14 | 1995-10-24 | Daido Steel Co Ltd | Heat resistant cast steel |
| JPH11279702A (en) * | 1998-03-26 | 1999-10-12 | Daido Steel Co Ltd | Steel for aluminum die casting die excellent in erosion-resistance |
| CN102703819A (en) * | 2012-01-19 | 2012-10-03 | 刘仕爽 | Wear-resisting steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60238449A (en) * | 1984-05-14 | 1985-11-27 | Nippon Steel Corp | High tension steel having superior toughness at low temperature in welding heat-affected zone |
| JPH07278761A (en) * | 1994-04-14 | 1995-10-24 | Daido Steel Co Ltd | Heat resistant cast steel |
| JPH11279702A (en) * | 1998-03-26 | 1999-10-12 | Daido Steel Co Ltd | Steel for aluminum die casting die excellent in erosion-resistance |
| CN102703819A (en) * | 2012-01-19 | 2012-10-03 | 刘仕爽 | Wear-resisting steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018103080A1 (en) * | 2016-12-09 | 2018-06-14 | 张康 | High-carbon chromium bearing steel heat treatment process |
| CN112322988A (en) * | 2020-11-23 | 2021-02-05 | 浙江宝武钢铁有限公司 | High-wear-resistance bearing steel electroslag ingot and processing technology thereof |
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| CN104195456B (en) | 2016-08-24 |
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