CN105714092A - Rolling bearing manufactured through special heat treatment process - Google Patents
Rolling bearing manufactured through special heat treatment process Download PDFInfo
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- CN105714092A CN105714092A CN201410740766.3A CN201410740766A CN105714092A CN 105714092 A CN105714092 A CN 105714092A CN 201410740766 A CN201410740766 A CN 201410740766A CN 105714092 A CN105714092 A CN 105714092A
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- outer ring
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Abstract
The invention discloses a heat treatment process for rolling bearings in the field of machine manufacturing. The heat treatment process is mainly applied to bearing part outer rings made of medium carbon steel (for example, 55# or 60#) or bearing steel. The special heat treatment requirements are met through high-frequency or medium-frequency heating quenching. Two times of quenching are conducted during heat treatment. The heat treatment process comprises the following steps of bulk heat treatment, induction heat treatment, and tempering and structure stabilization. In order to improve the strength of a roller path on a main stressed and abraded surface of a bearing, the roller path of an outer ring is subjected to heat treatment locally. An outer ring roller path and one end face of a bearing which bears axial stress can be subjected to heat treatment simultaneously, so that the compressive strength of a friction surface is improved, and the rolling contact fatigue life is prolonged. The heat treatment process for the rolling bearings has the advantages that the product quality is good, the process is simple, and cost is low.
Description
Technical field
The present invention relates to a kind of bearing mnanufacture technique, specifically, the present invention relates to a kind of medium carbon steel or bearing steel bearing outer ring Technology for Heating Processing.
Technical background
Bearing is drive disk assembly conventional in industrial equipment field, it is widely used in various equipment, difference according to application scenario, bearing should have the long-life, in high precision, the characteristic such as high rigidity, low noise, high-wearing feature, at construction machinery industry, such as plant equipment such as fork truck, stacker and excavators, also require to withstand shocks load.The present invention is the particular/special requirement answering these industries, a kind of roller bearing of exploitation, special Technology for Heating Processing is have employed during manufacture, the roller surface and the end face that make bearing outer ring have high rigidity, to ensure wearability and radial and axial bearing capacity, and heart portion and outer diameter face are softs, both ensure that toughness, outer diameter face injury friction track can have been prevented again.The progressive formation of hardness makes bearing have buffer capacity when being hit.This project finds that in research process adopting medium carbon steel to replace bearing steel to produce can reach more preferably effect, not only meets the requirement of client but also reduce cost.
Summary of the invention
The present invention is for overcoming the deficiencies in the prior art, it is provided that the Technology for Heating Processing of the rolling bearing that a kind of technique is simple, production cost is low.
The present invention is achieved by the following technical solutions:
A kind of Technology for Heating Processing of rolling bearing, described rolling bearing includes outer ring, inner ring, rolling element and retainer, and rolling element is steel ball or roller, and described Technology for Heating Processing is local heat treatmet, and heat processing unit is outer ring, and Technology for Heating Processing comprises the following steps:
(1) bulk heat treatmet is modified
Bearing outer ring is first modifier treatment in heating furnace, and temperature is 500-550 DEG C；Reach technique effect: bearing outer ring integral hardness HRC25-40, it is thus achieved that tempered sorbite；
(2) induction heat treatment
Heat treatment object: outer ring raceway or raceway and cycle surface
The mode of heating of induction heat treatment is the heating of electromagnetic induction local surfaces, induction loop presses close to bearing outer ring inwall or end face, the profile of induction loop is consistent with bearing outer ring inwall raceway or end face, requirement according to product case depth selects the high frequency electric source of corresponding frequencies, high frequency electric is passed into induction coil, outer ring raceway or end face are carried out sensing heating, heating is after certain time reaches hardening heat, bearing outer ring falls into immediately in hardening media and cools down, by regulating heat time heating time, relation between air cooling time (heat transfer time) and output controls the degree of depth of quench-hardened case and transition zone；Hardened layer hardness > HRC58, by the outside degree of depth 2-4mm of raceway；Transition region 4-6mm；
(3) tempering stabilizing tissue
After bearing outer ring impewdance matching, timely tempering, stabilizing tissue.
Heating source adopts electromagnetic induction heating, and high frequency, superaudio or intermediate frequency power supply carry out local heating by raceway in the electromagnetic induction coil outer ring to bearing, and electromagnetic induction heating is easy to temperature and is controlled to adjust.
Compared with prior art, the present invention has following beneficial effect: product quality is high；Technique is simple；Cost is low.
Detailed description of the invention
A kind of Technology for Heating Processing of rolling bearing, described rolling bearing includes outer ring, inner ring, rolling element and retainer, and rolling element is steel ball or roller, and described Technology for Heating Processing is local heat treatmet, and heat processing unit is outer ring, and Technology for Heating Processing comprises the following steps:
(1) bulk heat treatmet is modified
Bearing outer ring is first modifier treatment in heating furnace, and temperature is 500-550 DEG C；Reach technique effect: bearing outer ring integral hardness HRC25-40, it is thus achieved that tempered sorbite；
(3) induction heat treatment
Heat treatment object: outer ring raceway or raceway and cycle surface
The mode of heating of induction heat treatment is the heating of electromagnetic induction local surfaces, induction loop presses close to bearing outer ring inwall or end face, the profile of induction loop is consistent with bearing outer ring inwall raceway or end face, requirement according to product case depth selects the high frequency electric source of corresponding frequencies, high frequency electric is passed into induction coil, outer ring raceway or end face are carried out sensing heating, heating is after certain time reaches hardening heat, bearing outer ring falls into immediately in hardening media and cools down, by regulating heat time heating time, relation between air cooling time (heat transfer time) and output controls the degree of depth of quench-hardened case and transition zone；Hardened layer hardness > HRC58, by the outside degree of depth 2-4mm of raceway；Transition region 4-6mm；
(3) tempering stabilizing tissue
After bearing outer ring impewdance matching, timely tempering, stabilizing tissue.
Heating source adopts electromagnetic induction heating, and high frequency, superaudio or intermediate frequency power supply carry out local heating by raceway in the electromagnetic induction coil outer ring to bearing, and electromagnetic induction heating is easy to temperature and is controlled to adjust.
Claims (2)
1. a Technology for Heating Processing for rolling bearing, described rolling bearing includes outer ring, inner ring, rolling element and retainer, and rolling element is steel ball or roller, it is characterized in that, described Technology for Heating Processing is local heat treatmet, and heat processing unit is outer ring, and Technology for Heating Processing comprises the following steps:
(1) bulk heat treatmet is modified
Bearing outer ring is first modifier treatment in heating furnace, and temperature is 500-550 DEG C；It is incubated 3 hours；The type of cooling: oil cooling；Bearing outer ring integral hardness is made to reach HRC25-40, it is thus achieved that tempered sorbite；
(2) induction heat treatment
Heat treatment position: the mode of heating of outer ring raceway or cycle surface induction heat treatment is the heating of electromagnetic induction local surfaces, induction loop presses close to bearing outer ring inwall or end face, the profile of induction loop is consistent with bearing outer ring inwall raceway or end face, requirement according to product case depth selects the high frequency electric source of corresponding frequencies, high frequency electric is passed into induction coil, outer ring raceway or end face are carried out sensing heating, heating is after certain time reaches hardening heat, bearing outer ring falls into immediately in hardening media and cools down, by regulating heat time heating time, air cooling time, relation between heat transfer time and output controls the degree of depth of hardened layer and transition zone；Hardened layer hardness > HRC58, by the outside degree of depth 4mm of raceway；Transition region 4-6mm；Induction heating temperature: 800～850 DEG C；Temperature retention time: 20～30 minutes；The type of cooling: water-cooled；
(3) after tempering stabilizing tissue bearing outer ring impewdance matching, timely tempering, stabilizing tissue；
Temperature 180 DEG C～200 DEG C, temperature retention time 40～50 minutes；The type of cooling: air-cooled.
2. the Technology for Heating Processing of rolling bearing according to claim 1, it is characterised in that the material of described outer ring is 60# medium carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410740766.3A CN105714092A (en) | 2014-12-05 | 2014-12-05 | Rolling bearing manufactured through special heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410740766.3A CN105714092A (en) | 2014-12-05 | 2014-12-05 | Rolling bearing manufactured through special heat treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105714092A true CN105714092A (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410740766.3A Pending CN105714092A (en) | 2014-12-05 | 2014-12-05 | Rolling bearing manufactured through special heat treatment process |
Country Status (1)
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| CN (1) | CN105714092A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106244788A (en) * | 2016-07-29 | 2016-12-21 | 如皋市非标轴承有限公司 | A kind of bearing magnetic induction Technology for Heating Processing |
-
2014
- 2014-12-05 CN CN201410740766.3A patent/CN105714092A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106244788A (en) * | 2016-07-29 | 2016-12-21 | 如皋市非标轴承有限公司 | A kind of bearing magnetic induction Technology for Heating Processing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
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| WD01 | Invention patent application deemed withdrawn after publication |