CN104313294A - Thermal treatment method for dimensional stability of Cr4Mo4V steel bearing ring - Google Patents

Thermal treatment method for dimensional stability of Cr4Mo4V steel bearing ring Download PDF

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Publication number
CN104313294A
CN104313294A CN201410555822.6A CN201410555822A CN104313294A CN 104313294 A CN104313294 A CN 104313294A CN 201410555822 A CN201410555822 A CN 201410555822A CN 104313294 A CN104313294 A CN 104313294A
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CN
China
Prior art keywords
tempering
treatment method
thermal treatment
cr4mo4v steel
bearing
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
Application number
CN201410555822.6A
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Chinese (zh)
Inventor
沈伟毅
李昭昆
李贯卿
龚建勋
杨德胜
陈文君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luoyang LYC Bearing Co Ltd
Original Assignee
Luoyang LYC Bearing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Luoyang LYC Bearing Co Ltd filed Critical Luoyang LYC Bearing Co Ltd
Priority to CN201410555822.6A priority Critical patent/CN104313294A/en
Publication of CN104313294A publication Critical patent/CN104313294A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D6/00Heat treatment of ferrous alloys
    • C21D6/002Heat treatment of ferrous alloys containing Cr
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races

Abstract

The invention belongs to the technical field of bearing machining processes, and mainly relates to a thermal treatment method for stability of a Cr4Mo4V steel bearing. The thermal treatment method comprises the following steps: heating a ring to a quenching heating temperature of 1065-1090 DEG C, carrying out heat preservation and then filling nitrogen to carry out oil cooling; heating the bearing ring to a tempering heating temperature of 535-545 DEG C for 2-2.5 hours and tempering for three times; carrying out coarse grinding and adding tempering at 520+/-5 DEG C for 4-4.5 hours; and carrying out fine grinding and adding tempering at 250+/-5 DEG C for 8-10 hours. According to the thermal treatment method for stability of the Cr4Mo4V steel bearing, the grinding stress is eliminated to the greatest extent, the retained austenite in the bearing ring is further transformed and stabilized, the average size change rate of the finished ring is 1.33*10<-5>, the maximum size change rate is 2.67*10<-5>, and the user requirements for the aero-engine main shaft bearings are satisfied.

Description

A kind of heat treating method of Cr4Mo4V steel bearings lasso dimensional stability
Technical field
The invention belongs to bearing processing technical field, relate generally to a kind of heat treating method of Cr4Mo4V steel bearings stability.
Background technology
The Main Shaft Bearing of Engine of Cr4Mo4V steel making is mainly used in aircraft engine, in prior art, the heat treating method of Cr4Mo4V steel bearings lasso is: after Cr4Mo4V steel bearings lasso being heated in quenching furnance 1065 ~ 1090 DEG C of insulation for some time, inflated with nitrogen carries out oil cooling, oil cooling to 50 ~ 200 DEG C, then cooled Cr4Mo4V steel bearings lasso is put into tempering stove to heat, be heated to 535 ~ 545 DEG C, be incubated 2 ~ 2.5 hours, tempering three times; After corase grind, Cr4Mo4V steel bearings lasso is placed in tempering stove and is heated to 250 ± 5 DEG C, 8 ~ 10 hours time.
Adopt the Cr4Mo4V steel bearings after above-mentioned heat treating method process depositing in process the secular distortion existed in various degree, cause Cr4Mo4V steel bearings lasso size unstable, have impact on the use of client.
The Main Shaft Bearing of Engine of Cr4Mo4V steel making, type aircraft engine is used for for certain user, this bearing is up to the standards through inspection department, but after mailing to user there is bearing ring size swell phenomenon in inspection, illustrate that Cr4Mo4V steel bearings lasso exists secular distortion, cause size unstable, have impact on the use of user.For the problem that this is anxious to be resolved, carry out the research of Cr4Mo4V steel bearings dimensional stability.Experimental study heat-resisting steel bearing parts dimensional stability, the principal element affecting the dimensional stability of Cr4Mo4V steel bearings lasso is the release of the transformation of residual austenite, remaining grinding stress.
Summary of the invention
For solving the problems of the technologies described above, the object of the invention is the heat treating method proposing a kind of Cr4Mo4V steel bearings lasso dimensional stability.
The technical solution used in the present invention is: a kind of heat treating method of Cr4Mo4V steel bearings lasso dimensional stability, and described heat treating method includes Quench and temper; In quenching furnance, lasso is heated to quenching temperature 1065 ~ 1090 DEG C, insulation 30 ~ 55min; Inflated with nitrogen oil cooling to 50 ~ 200 DEG C after coming out of the stove; Cr4Mo4V steel bearings lasso is put into tempering stove, is heated to tempering Heating temperature 535 ~ 545 DEG C, 2 ~ 2.5 hours time, tempering three times; Carry out additional tempering after corase grind, it is characterized in that: the temperature 520 ± 5 DEG C of additional tempering after corase grind, 4 ~ 4.5 hours time; Additional tempering is carried out, additional tempering temperature 250 ± 5 DEG C, 8 ~ 10 hours time after fine grinding.
The present invention adopts Cr4Mo4V steel making bearing ring three high temperings after quenching, increase and have adjusted the additional tempering after grinding processing, further obviating grinding stress, make the residual austenite in bearing ring change stabilization further, is very favourable to bearing ring dimensional stability.It is 1.33 × 10 that finished product lasso deposits rear mean sizes velocity of variation -5, the maximum velocity of variation of size is 2.67 × 10 -5, this result meets user's requirement of aeroplane engine mainshaft bearing, and bearing ring scrap rate reduces to zero, significantly reduces production cost.
The inventive method is used for aircraft engine main shaft bearing, proof is used through user, the dimensional stability problems of Cr4Mo4V steel bearings lasso is resolved, and company Cr4Mo4V steel bearings lasso has now adopted the method to produce, for aircraft bearing adopts high performance material to lay a good foundation.
Embodiment
In conjunction with the embodiment provided, the present invention is illustrated.
Embodiment 1:
1, in quenching furnance, Cr4Mo4V steel bearings lasso is heated to quenching temperature 1075 ± 10 DEG C, insulation 35 ± 5min, inflated with nitrogen oil cooling 100 ~ 200 DEG C after coming out of the stove;
2, Cr4Mo4V steel bearings lasso is put into tempering stove, be heated to tempering Heating temperature 540 ± 5 DEG C, 2 ~ 2.5 hours time; High tempering three times;
3, additional tempering is carried out, temperature 520 ± 5 DEG C, 4 ~ 4.5 hours time after corase grind;
4, additional tempering is carried out after fine grinding, temperature 250 ± 5 DEG C, 8 ~ 8.5 hours time.
Embodiment 2:
1, in quenching furnance, Cr4Mo4V steel bearings lasso is heated to quenching temperature 1080 ± 10 DEG C, insulation 45 ± 5min, inflated with nitrogen oil cooling 100 ~ 200 DEG C after coming out of the stove;
2, Cr4Mo4V steel bearings lasso is put into tempering stove, be heated to tempering Heating temperature 540 ± 5 DEG C, 2 ~ 2.5 hours time; High tempering three times;
3, additional tempering is carried out, temperature 520 ± 5 DEG C, 4 ~ 4.5 hours time after corase grind;
4, additional tempering is carried out after fine grinding, temperature 250 ± 5 DEG C, 9 ~ 9.5 hours time.

Claims (1)

1. a heat treating method for Cr4Mo4V steel bearings lasso dimensional stability, described heat treating method includes Quench and temper; In quenching furnance, lasso is heated to quenching temperature 1065 ~ 1090 DEG C, insulation 30 ~ 55min; Inflated with nitrogen oil cooling to 50 ~ 200 DEG C after coming out of the stove; Cooled Cr4Mo4V steel bearings lasso is put into tempering stove, is heated to tempering Heating temperature 535 ~ 545 DEG C, 2 ~ 2.5 hours time, tempering three times; Carry out additional tempering after corase grind, it is characterized in that: the temperature 520 ± 5 DEG C of additional tempering after corase grind, 4 ~ 4.5 hours time; Additional tempering is carried out, additional tempering temperature 250 ± 5 DEG C, 8 ~ 10 hours time after fine grinding.
CN201410555822.6A 2014-10-20 2014-10-20 Thermal treatment method for dimensional stability of Cr4Mo4V steel bearing ring Pending CN104313294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410555822.6A CN104313294A (en) 2014-10-20 2014-10-20 Thermal treatment method for dimensional stability of Cr4Mo4V steel bearing ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410555822.6A CN104313294A (en) 2014-10-20 2014-10-20 Thermal treatment method for dimensional stability of Cr4Mo4V steel bearing ring

Publications (1)

Publication Number Publication Date
CN104313294A true CN104313294A (en) 2015-01-28

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Application Number Title Priority Date Filing Date
CN201410555822.6A Pending CN104313294A (en) 2014-10-20 2014-10-20 Thermal treatment method for dimensional stability of Cr4Mo4V steel bearing ring

Country Status (1)

Country Link
CN (1) CN104313294A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106312457A (en) * 2016-08-31 2017-01-11 洛阳轴研科技股份有限公司 Machining method of large thin-wall bearing ring
CN106893947A (en) * 2017-03-28 2017-06-27 北京科技大学 It is a kind of to be resistant to 400 degree of preparation methods of the bearing steel of high temperature
CN107513602A (en) * 2017-10-24 2017-12-26 中国航发哈尔滨轴承有限公司 A kind of same temperature hardening heat treatment method of raising 8Cr4Mo4V steel toughness
CN111172358A (en) * 2020-02-21 2020-05-19 沈阳工业大学 Heat treatment method for controlling dimensional change of high-temperature bearing steel
CN112192322A (en) * 2020-09-16 2021-01-08 常熟缘阳机械制造有限公司 Anti-deformation grinding process for bearing ring
CN112643408A (en) * 2020-12-23 2021-04-13 中国航发哈尔滨轴承有限公司 Anti-deflection starter bearing and manufacturing method of roller thereof
CN113278785A (en) * 2021-03-29 2021-08-20 中浙高铁轴承有限公司 Heat treatment process of thin-wall bearing ring

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545384A1 (en) * 1991-12-03 1993-06-09 Koyo Seiko Co., Ltd. Bearing components and process for producing same
CN101575666A (en) * 2009-06-19 2009-11-11 洛阳Lyc轴承有限公司 Heat processing technology for improving low-temperature impact work of 42CrMo bearing
CN102220471A (en) * 2011-05-27 2011-10-19 瓦房店东旭非标准轴承集团有限公司 Heat treatment and dissection method of oversized dissection bearing ring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545384A1 (en) * 1991-12-03 1993-06-09 Koyo Seiko Co., Ltd. Bearing components and process for producing same
CN101575666A (en) * 2009-06-19 2009-11-11 洛阳Lyc轴承有限公司 Heat processing technology for improving low-temperature impact work of 42CrMo bearing
CN102220471A (en) * 2011-05-27 2011-10-19 瓦房店东旭非标准轴承集团有限公司 Heat treatment and dissection method of oversized dissection bearing ring

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
王金玲等: "Cr4Mo4V钢制轴承零件的真空热处理工艺", 《轴承》 *
轴承行业教材编审委员会: "《轴承热处理工艺学》", 30 November 1988 *
龚建勋等: "H10Cr4Mo4Ni4V 钢制轴承外圈热处理工艺", 《轴承》 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106312457A (en) * 2016-08-31 2017-01-11 洛阳轴研科技股份有限公司 Machining method of large thin-wall bearing ring
CN106893947A (en) * 2017-03-28 2017-06-27 北京科技大学 It is a kind of to be resistant to 400 degree of preparation methods of the bearing steel of high temperature
CN106893947B (en) * 2017-03-28 2018-07-27 北京科技大学 A kind of preparation method for the bearing steel being resistant to 400 degree of high temperature
CN107513602A (en) * 2017-10-24 2017-12-26 中国航发哈尔滨轴承有限公司 A kind of same temperature hardening heat treatment method of raising 8Cr4Mo4V steel toughness
CN111172358A (en) * 2020-02-21 2020-05-19 沈阳工业大学 Heat treatment method for controlling dimensional change of high-temperature bearing steel
CN111172358B (en) * 2020-02-21 2021-09-17 沈阳工业大学 Heat treatment method for controlling dimensional change of high-temperature bearing steel
CN112192322A (en) * 2020-09-16 2021-01-08 常熟缘阳机械制造有限公司 Anti-deformation grinding process for bearing ring
CN112643408A (en) * 2020-12-23 2021-04-13 中国航发哈尔滨轴承有限公司 Anti-deflection starter bearing and manufacturing method of roller thereof
CN113278785A (en) * 2021-03-29 2021-08-20 中浙高铁轴承有限公司 Heat treatment process of thin-wall bearing ring

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Application publication date: 20150128