CN104328265A - Quenching process for bearing ring raceway - Google Patents
Quenching process for bearing ring raceway Download PDFInfo
- Publication number
- CN104328265A CN104328265A CN201410699128.1A CN201410699128A CN104328265A CN 104328265 A CN104328265 A CN 104328265A CN 201410699128 A CN201410699128 A CN 201410699128A CN 104328265 A CN104328265 A CN 104328265A
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- CN
- China
- Prior art keywords
- quenching
- time
- frequency induction
- medium
- bearing ring
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- 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.)
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Classifications
-
- 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
-
- 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
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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)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a quenching process for a bearing ring raceway. The quenching process is characterized in that medium-frequency induction heating quenching is adopted on a medium-frequency quenching machine tool, an inductor adopts a circular ring-shaped inductor, and the medium-frequency induction heating time is 7-15s; pre-cooling is performed for 1-3s after heating, and a polyvinyl alcohol solution is sprayed for cooling; and tempering is performed in an air furnace at the temperature of 160 DEG C-200 DEG C for 3-6h. The process provided by the invention is reasonable in process flow, the medium-frequency induction heating quenching and tempering processes are adopted, the deformation of a bearing ring in the heat treatment process is reduced to facilitate subsequent processing, the finished product rate is improved, the production of waste and defective products is reduced and the production cost is also reduced.
Description
Technical field
The present invention relates to a kind of production technique of bearing, especially relate to a kind of quenching technology of bearing collar path.
Background technology
Bearing ring is the vitals of bearing, operationally bear the complex stresses such as stretching, compression, shearing, bending, alternation, and stress value is larger.This just requires that bearing ring has high rigidity, high-wearing feature and certain impelling strength and fracture toughness, and will have good dimensional stability, usually needs to adopt suitable thermal treatment process to improve the comprehensive mechanical property of bearing ring.The dimensional precision of bearing collar path and hardness, wear resistance play vital effect for the performance of whole bearing.At present, the thermal treatment process of bearing ring generally adopts salt bath integral heating quenching, but bearing ring thermal treatment after strain is comparatively large, and bring difficulty to following process, part qualification rate is lower.
Summary of the invention
The applicant, for above-mentioned problem, is studied improvement, provides a kind of quenching technology of bearing collar path, technical process is reasonable, reduces the distortion of bearing ring in heat treatment process, facilitates following process, improve yield rate, reduce the generation of waster, reduce production cost.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A quenching technology for bearing collar path, intermediate-frequency quenching machine tool adopts medium frequency induction hardening, and inductor block adopts annular inductor block, processing parameter: the turn ratio 16 of output transformer, load voltage 700V, electric current 80A, power factor 0.92, power 50kW, heat-up time is 7 ~ 15 seconds; Precooling 1 ~ 3 second after heating, and spray polyvinyl alcohol solution cooling; Tempering in air furnace, temperature is 160 ° of C ~ 200 ° C, and the time is 3 ~ 6 hours.
Further:
Medium frequency induction hardening heat-up time is 9 seconds.
After described heating, pre-coo time is 2 seconds.
Described tempering temperature is 180 ° of C, 5 hours time.
Technique effect of the present invention is:
The quenching technology of a kind of bearing collar path disclosed by the invention, technical process is reasonable, adopts medium frequency induction hardening to add the technique of tempering, reduce the distortion of bearing ring in heat treatment process, facilitate following process, improve yield rate, reduce the generation of waster, reduce production cost.
Embodiment
Below the specific embodiment of the present invention is described in further detail.
Embodiment 1,
Bearing ferrule blanks forging, after roughing, intermediate-frequency quenching machine tool adopts medium frequency induction hardening, and inductor block adopts annular inductor block, processing parameter: the turn ratio 16 of output transformer, load voltage 700V, electric current 80A, power factor 0.92, power 50kW, heat-up time is 9 seconds; Precooling 2 seconds after heating, and spray polyvinyl alcohol solution cooling; Tempering in air furnace, temperature is 180 ° of C, and the time is 4 hours.After testing, hardness is 64 ~ 65HRC, penetration of hardness 2.7 ~ 3.2 millimeters.
Embodiment 2,
Bearing ferrule blanks forging, after roughing, intermediate-frequency quenching machine tool adopts medium frequency induction hardening, and inductor block adopts annular inductor block, processing parameter: the turn ratio 16 of output transformer, load voltage 700V, electric current 80A, power factor 0.92, power 50kW, heat-up time is 15 seconds; Precooling 3 seconds after heating, and spray polyvinyl alcohol solution cooling; Tempering in air furnace, temperature is 200 ° of C, and the time is 5 hours.After testing, hardness is 64 ~ 66HRC, penetration of hardness 3.0 ~ 3.6 millimeters.
Embodiment 3,
Bearing ferrule blanks forging, after roughing, intermediate-frequency quenching machine tool adopts medium frequency induction hardening, and inductor block adopts annular inductor block, processing parameter: the turn ratio 16 of output transformer, load voltage 700V, electric current 80A, power factor 0.92, power 50kW, heat-up time is 7 seconds; Precooling 1 second after heating, and spray polyvinyl alcohol solution cooling; Tempering in air furnace, temperature is 160 ° of C, and the time is 6 hours.After testing, hardness is 63 ~ 65HRC, penetration of hardness 2.5 ~ 3.0 millimeters.
Claims (4)
1. the quenching technology of a bearing collar path, it is characterized in that: on intermediate-frequency quenching machine tool, adopt medium frequency induction hardening, inductor block adopts annular inductor block, processing parameter: the turn ratio 16 of output transformer, load voltage 700V, electric current 80A, power factor 0.92, power 50kW, heat-up time is 7 ~ 15 seconds; Precooling 1 ~ 3 second after heating, and spray polyvinyl alcohol solution cooling; Tempering in air furnace, temperature is 160 ° of C ~ 200 ° C, and the time is 3 ~ 6 hours.
2. according to the quenching technology of bearing collar path according to claim 1, it is characterized in that: medium frequency induction hardening heat-up time is 9 seconds.
3. according to the quenching technology of bearing collar path according to claim 1, it is characterized in that: after described heating, pre-coo time is 2 seconds.
4. according to the quenching technology of bearing collar path according to claim 1, it is characterized in that: described tempering temperature is 180 ° of C, 5 hours time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699128.1A CN104328265A (en) | 2014-11-28 | 2014-11-28 | Quenching process for bearing ring raceway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699128.1A CN104328265A (en) | 2014-11-28 | 2014-11-28 | Quenching process for bearing ring raceway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104328265A true CN104328265A (en) | 2015-02-04 |
Family
ID=52403070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410699128.1A Pending CN104328265A (en) | 2014-11-28 | 2014-11-28 | Quenching process for bearing ring raceway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104328265A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104611528A (en) * | 2015-02-06 | 2015-05-13 | 桂林理工大学 | Heating method for refined 70# steel austenite grain |
| CN106011393A (en) * | 2016-07-01 | 2016-10-12 | 兴化东华齿轮有限公司 | Heat treatment induction quenching process for small hole |
| CN106119512A (en) * | 2016-08-31 | 2016-11-16 | 瓦房店正达冶金轧机轴承有限公司 | A kind of quenching process being applicable to bearing ring |
-
2014
- 2014-11-28 CN CN201410699128.1A patent/CN104328265A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 杨晔: "轴承套圈的中频感应加热淬火", 《金属热处理》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104611528A (en) * | 2015-02-06 | 2015-05-13 | 桂林理工大学 | Heating method for refined 70# steel austenite grain |
| CN106011393A (en) * | 2016-07-01 | 2016-10-12 | 兴化东华齿轮有限公司 | Heat treatment induction quenching process for small hole |
| CN106119512A (en) * | 2016-08-31 | 2016-11-16 | 瓦房店正达冶金轧机轴承有限公司 | A kind of quenching process being applicable to bearing ring |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150204 |
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| WD01 | Invention patent application deemed withdrawn after publication |