CN107034344A - A kind of steel bearings retainer stress relief annealing technique - Google Patents
A kind of steel bearings retainer stress relief annealing technique Download PDFInfo
- Publication number
- CN107034344A CN107034344A CN201710301479.6A CN201710301479A CN107034344A CN 107034344 A CN107034344 A CN 107034344A CN 201710301479 A CN201710301479 A CN 201710301479A CN 107034344 A CN107034344 A CN 107034344A
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- Prior art keywords
- retainer
- stress relief
- relief annealing
- annealing technique
- vacuum
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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
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- 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
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A kind of steel bearings retainer stress relief annealing technique, is related to a kind of heat treatment processing method.The present invention solve surface stress that existing 40CrNiMoA steels retainer produces in mechanical processing process it is higher caused by retainer plasticity and toughness are poor, low retainer bulk strength and the problem of poor machining accuracy.Concretely comprise the following steps：1), using alcohol washes retainer, surface cut liquid is removed, then wipes retainer totally；2) clean retainer, will be wiped and be put into vacuum gas glowing furnace, vacuum stress relief annealing technique is set, be specially：Vacuum reaches 3 × 10‑4Started to warm up after mbar, heating rate is 8~20 DEG C/min, the constant temperature when retainer temperature reaches 550 ± 5 DEG C, 120 ± 5min of constant temperature time is then passed to after nitrogen cools down retainer and come out of the stove.The present invention is used for retainer stress relief annealing.
Description
Technical field
The present invention relates to a kind of heat treatment processing method, and in particular to a kind of steel bearings retainer stress relief annealing work
Skill.
Background technology
Retainer is one of big part of bearing four, with the raising required bearing life, to the property of retainer
Higher and higher requirement can be it is also proposed, relative to traditional copper alloy bearing cage, 40CrNiMoA steel retainers are excellent with its
Different mechanical property is widely used.For the processing of high-precision retainer, after multiple tracks machining operation, table
Face is present compared with high tensile stress, influences retainer plasticity and toughness, and retainer bulk strength is low, continues crackle often occur when processing, sternly
Ghost image rings retainer quality and machining accuracy, reduces bearing reliability.
The content of the invention
The present invention is that the surface produced to solve existing 40CrNiMoA steels retainer in mechanical processing process should
Retainer plasticity and toughness are poor caused by power is higher, low retainer bulk strength and the problem of poor machining accuracy, and then there is provided one
Plant steel bearings retainer stress relief annealing technique.
The present invention is for the technical scheme that is used of solution above-mentioned technical problem：
A kind of steel bearings retainer stress relief annealing technique, it comprises the following steps：
Step 1: using alcohol washes retainer, removing surface cut liquid, then wiping retainer totally；
Step 2: will wipe clean retainer is put into vacuum gas glowing furnace, vacuum stress relief annealing technique, tool are set
Body is：Vacuum reaches 3 × 10-4Started to warm up after mbar, heating rate is 8~20 DEG C/min, when retainer temperature reaches
Constant temperature at 550 ± 5 DEG C, 120 ± 5min of constant temperature time is then passed to after nitrogen cools down retainer and come out of the stove.
Further, retainer is the 40CrNiMoA semi-finished product retainers of modifier treatment, and 590 DEG C of refining temperature~
630℃。
Further, the nitrogen pressure being passed through in step 2 is 1~1.5bar.
Further, it is passed through after retainer is cooled to 43 DEG C or less than 43 DEG C by nitrogen and comes out of the stove in step 2.
The present invention has the following effects that compared with prior art：
The stress relief annealing technique set by the present invention, can not change the premise of retainer original size precision
Under, the residual stress formed by the retainer surface of multiple tracks machining operation is eliminated, can have retainer higher
Plasticity and toughness, higher intensity and higher machining accuracy, it is ensured that the smooth implementation of subsequent mechanical manufacturing procedure.To one in experiment
Individual sample carries out surface accuracy test, it is found that the internal diameter ovality (Vdcp) before destressing is 0.025, be 0.03 after destressing,
Surface accuracy is significantly improved.
Brief description of the drawings
Fig. 1 is stress relief annealing process curve schematic diagram；
Fig. 2 is that (abscissa is specimen coding to retainer destressing front and rear surfaces hardness balance situation schematic diagram, and ordinate is
Vickers hardness number)；
Fig. 3 is that (abscissa is specimen coding to retainer destressing front and rear surfaces stress elimination change schematic diagram, and ordinate is
Surface stress/MPa)；
Fig. 4 is that (abscissa is specimen coding to tensile strength change schematic diagram before and after retainer destressing, and ordinate is does drawing
Intensity/MPa).
Embodiment
Embodiment one：Illustrate present embodiment, a kind of steel bearings retainer stress relief annealing with reference to Fig. 1~4
Technique, it comprises the following steps：
Step 1: using alcohol washes retainer, removing surface cut liquid, then wiping retainer totally；
Step 2: will wipe clean retainer is put into vacuum gas glowing furnace, vacuum stress relief annealing technique, tool are set
Body is：Vacuum reaches 3 × 10-4Started to warm up after mbar, (maintain to vacuumize action after heating but do not consider specific vacuum
Numerical value) heating rate be 8~20 DEG C/min, the constant temperature when retainer temperature reaches 550 ± 5 DEG C, 120 ± 5min of constant temperature time,
Then pass to after nitrogen cools down retainer to come out of the stove and (presentation quality inspection is carried out to retainer after coming out of the stove, mainly seen if there is
Bump injury, cut etc.).
Embodiment two：Illustrate present embodiment with reference to Fig. 1~4, retainer is the 40CrNiMoA of modifier treatment
Semi-finished product retainer, and refining temperature is 590 DEG C~630 DEG C.It is so designed that, under the refining temperature, retainer has excellent
Different performance and processing characteristics, and follow-up 550 ± 5 DEG C of stress relief annealing technique can be implemented.By end after modifier treatment
Face, cylindrical, internal diameter car, and hole milling process is bored, there is larger stress in retainer surface, according to moving back for embodiment one
Ignition technique carries out stress relief annealing, fully removes retainer surface machining stress (see Fig. 3), improves subsequent mechanical processing
Stability, while keeping ensureing that retainer has original performance (see Fig. 2, Fig. 4).Other compositions and annexation
It is identical with embodiment one.
Embodiment three：Illustrate that the nitrogen pressure being passed through in present embodiment, step 2 is 1 with reference to Fig. 1~4
~1.5bar.It is so designed that, fully cooling, and control cooling rate, it is ensured that retainer precision in stress relief annealing is not broken
It is bad, it is shown in Table 1.Other compositions are identical with annexation with embodiment one or two.
Embodiment four：Illustrate that being passed through nitrogen in present embodiment, step 2 cools down retainer with reference to Fig. 1~4
Come out of the stove after to 43 DEG C or less than 43 DEG C.Other compositions are identical with embodiment three with annexation.
Each surface accuracy situation of change before and after the destressing of table 1
Claims (4)
1. a kind of steel bearings retainer stress relief annealing technique, it is characterised in that：It comprises the following steps：
Step 1: using alcohol washes retainer, removing surface cut liquid, then wiping retainer totally；
Step 2: will wipe clean retainer is put into vacuum gas glowing furnace, vacuum stress relief annealing technique is set, specifically
For：Vacuum reaches 3 × 10-4Started to warm up after mbar, heating rate is 8~20 DEG C/min, 550 are reached when retainer temperature ±
Constant temperature at 5 DEG C, 120 ± 5min of constant temperature time is then passed to after nitrogen cools down retainer and come out of the stove.
2. a kind of steel bearings retainer stress relief annealing technique according to claim 1, it is characterised in that：Retainer is
The 40CrNiMoA semi-finished product retainers of modifier treatment, and refining temperature is 590 DEG C~630 DEG C.
3. a kind of steel bearings retainer stress relief annealing technique according to claim 1 or 2, it is characterised in that：Step
The nitrogen pressure being passed through in two is 1~1.5bar.
4. a kind of steel bearings retainer stress relief annealing technique according to claim 3, it is characterised in that：In step 2
It is passed through after retainer is cooled to 43 DEG C or less than 43 DEG C by nitrogen and comes out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301479.6A CN107034344A (en) | 2017-05-02 | 2017-05-02 | A kind of steel bearings retainer stress relief annealing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301479.6A CN107034344A (en) | 2017-05-02 | 2017-05-02 | A kind of steel bearings retainer stress relief annealing technique |
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| Publication Number | Publication Date |
|---|---|
| CN107034344A true CN107034344A (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710301479.6A Pending CN107034344A (en) | 2017-05-02 | 2017-05-02 | A kind of steel bearings retainer stress relief annealing technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080900A (en) * | 2017-12-27 | 2018-05-29 | 中国航发哈尔滨轴承有限公司 | A kind of method that bearing is made using 40Cr15Mo2VN materials |
| CN110465668A (en) * | 2019-07-24 | 2019-11-19 | 南通灵顿机械有限公司 | Processing technology for turbocharger middle casing |
| CN111321280A (en) * | 2020-03-27 | 2020-06-23 | 南京钢铁股份有限公司 | Stress relief annealing method for bearing steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060063A (en) * | 2014-06-26 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Manufacturing method of novel plunger pump retainer |
| CN105132635A (en) * | 2015-09-10 | 2015-12-09 | 安庆银泰轴承有限公司 | Annealing process for inner sleeve of bearing of air conditioner |
| CN105200306A (en) * | 2015-09-28 | 2015-12-30 | 苏州市大力电器有限公司 | Production method of cast iron retainer with self-lubricating performance |
| CN105779717A (en) * | 2014-12-13 | 2016-07-20 | 重庆霸腾机械有限公司 | Stress relief annealing technology for 38CrMoAlA |
-
2017
- 2017-05-02 CN CN201710301479.6A patent/CN107034344A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060063A (en) * | 2014-06-26 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Manufacturing method of novel plunger pump retainer |
| CN105779717A (en) * | 2014-12-13 | 2016-07-20 | 重庆霸腾机械有限公司 | Stress relief annealing technology for 38CrMoAlA |
| CN105132635A (en) * | 2015-09-10 | 2015-12-09 | 安庆银泰轴承有限公司 | Annealing process for inner sleeve of bearing of air conditioner |
| CN105200306A (en) * | 2015-09-28 | 2015-12-30 | 苏州市大力电器有限公司 | Production method of cast iron retainer with self-lubricating performance |
Non-Patent Citations (1)
| Title |
|---|
| 王忠诚主编: "《汽车零件热处理实用技术》", 30 June 2013 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080900A (en) * | 2017-12-27 | 2018-05-29 | 中国航发哈尔滨轴承有限公司 | A kind of method that bearing is made using 40Cr15Mo2VN materials |
| CN110465668A (en) * | 2019-07-24 | 2019-11-19 | 南通灵顿机械有限公司 | Processing technology for turbocharger middle casing |
| CN111321280A (en) * | 2020-03-27 | 2020-06-23 | 南京钢铁股份有限公司 | Stress relief annealing method for bearing steel |
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