CN102441768A - Technology for processing dual-hardness roller sleeve ring of bearing steel - Google Patents
Technology for processing dual-hardness roller sleeve ring of bearing steel Download PDFInfo
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- CN102441768A CN102441768A CN2010105434278A CN201010543427A CN102441768A CN 102441768 A CN102441768 A CN 102441768A CN 2010105434278 A CN2010105434278 A CN 2010105434278A CN 201010543427 A CN201010543427 A CN 201010543427A CN 102441768 A CN102441768 A CN 102441768A
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Abstract
The invention relates to a technology for processing a dual-hardness roller sleeve ring of a bearing steel, which mainly comprises seven processing steps of blanking, forging by a pressure machine, spheroidizing annealing, turning, quenching, tempering and grinding, wherein the quenching and tempering steps are composed of sub-steps of sleeve ring quenching, high temperature tempering, sleeve ring roller path quenching and sleeve ring roller path tampering; and particularly the quenching and tempering steps comprise the following sub-steps of: firstly, quenching the roller wheel sleeve ring; next, tempering at high temperature of 500-530 degrees centigrade to lead to the surface hardness of the sleeve ring to be HRC (Rockwell C-scale Hardness) 30-40; then, quenching the roller path of the roller sleeve ring at a temperature in the range of 900-950 degrees centigrade; finally tempering the roller sleeve ring to lead to the surface hardness of the roller path to be HRC 58-62. The dual-hardness roller sleeve ring of the bearing steel processed by the technology provided by the invention has good buffering performance, impact resistance and long service life.
Description
Technical field
The present invention relates to the two hardness roller lasso processing technologys of a kind of bearing steel.
Background technology
Bearing steel roller lasso is the primary clustering of bearing; Traditional bearing steel roller lasso processing technology mainly comprises blanking, forcing press forging, spheroidizing, turning processing, quenching, tempering and grinding-shaping seven big processing steps; Each case hardness of roller lasso that it processes is identical; Very easily damage the orbital plane of roller motion in use, lasso fragility is big.
Summary of the invention
The technical problem that the present invention will solve provides the two hardness roller lasso processing technologys of a kind of bearing steel; The roller lasso raceway face hardness height, heart portion and the periphery hardness that process are low; Has good shock-absorbing capacity; More shock-resistant, effectively protected the track of roller motion, advancing the track service life.
For solving the problems of the technologies described above; Technical scheme of the present invention is: the two hardness roller lasso processing technologys of a kind of bearing steel; Mainly comprise blanking, forcing press forging, spheroidizing, turning processing, quenching, tempering and grinding-shaping seven big processing steps, its innovative point is: said tempering process adopts high tempering and between tempering and grinding process, increases raceway impewdance matching, raceway tempering; Said high tempering temperature range is between 500 ℃-530 ℃, and the case hardness of lasso is at HRC 30-40 after the tempering; Said raceway impewdance matching temperature range is at 900 ℃-950 ℃, surface induction 12-20 heat time heating time second; 195 ℃ of said lasso raceway temperatures, tempering time 5.5-6h, raceway face hardness reaches HRC58-62.
The invention has the advantages that: quenching, tempering process are made up of ring quenching, high tempering, lasso raceway impewdance matching, the tempering of lasso raceway; Make the ring table surface hardness at HRC30-40; And the raceway face hardness of lasso reaches HRC58-62; Lasso body portion tissue is made up of tempered sorbite; Have good impact flexibility and elastic limit, raceway face by superfine little cryptocrystalline martensite, equally distributed carbide, participate in austenite on a small quantity and constitute, have high rigidity, intensity and wearability.The meta tissue becomes than stabilizing tissue after the tempering, stable dimensions.Whole lasso has good good impact flexibility, long service life.
The specific embodiment
At first blanking is heated to 950-1050 ℃ with the bearing steel bar, and the calculation bearing lasso forges required length, and sheared blank is become section.
Carry out forcing press and forge, through jumping-up, instead squeeze, punching, whole high, roll over and obtain the forging shape after expanding operation.
Spheroidizing behind 780 ℃-810 ℃ insulation 1-2h, is cooled off with stove with 10-15 ℃/h, at 650 ℃ of air coolings of coming out of the stove.
Car spare finished figure is pressed in turning processing, and the back grinding to be heated of a small amount of surplus is stayed in the moulding of turning roller lasso.
Above-mentioned technology is common process, this no longer tired stating.
Carry out quenching, the tempering process of roller lasso, it is made up of ring quenching, high tempering, the quenching of lasso raceway, the tempering of lasso raceway.Concrete:
At first quench; With GCr15 bearing ball annealing car spare, wall thickness is that the roller lasso of 10-20mm is an example; Confirm that the hardening heat scope is at 835 ℃-855 ℃; Heat tracing total time changed 5-10 ℃ of additional cold water over to behind the oil cooling and handles between 25-60 minute in 30-90 ℃ of oil temperature in the roller-type meshbeltfurnace;
Carry out high tempering then, temperature range is between 500 ℃-530 ℃, and the ring table surface hardness after the tempering is at HRC 30-40.
High tempering embodiment 1:
This bearing roller lasso wall thickness is 10.191mm, adopts 510 ℃ of temperatures, and recording with batch hardness range after the tempering is HRC36-38, and batch difference of hardness is less than 2HRC together.
High tempering embodiment 2:
This bearing roller lasso wall thickness 12.5mm adopts 520 ℃ of temperatures, and recording with batch hardness range after the tempering is HRC35-37, and batch difference of hardness is less than 2HRC together.
High tempering embodiment 3:
This bearing roller lasso wall thickness 20mm adopts 530 ℃ of temperatures, and recording with batch hardness range after the tempering is HRC35-37HRC, and batch difference of hardness is less than 2HRC together.
After roller ring quenching, tempering process finish; Carry out the raceway impewdance matching of roller lasso again, this point is an emphasis of the present invention, and concrete steps are: adopt the superaudio impewdance matching; Superaudio frequency 30-50KHZ; Heating roller lasso groove portion position 12-20 second makes to be warming up to 900 ℃-950 ℃, and in the general quenching liquid of GCr15 cooling 11-13 second to normal temperature;
Last pair roller lasso raceway carries out tempering; Actual when the raceway tempering is that pair roller lasso integral body is carried out tempering; Tempering time 6h in 195 ℃, raceway face hardness reaches HRC58-62, and raceway quench-hardened case interior tissue is made up of superfine cryptocrystalline martensite, tiny and carbide and small portion of residual austenite that be evenly distributed; The meta tissue becomes than stabilizing tissue after the tempering, stable dimensions.
Roller lasso raceway quenches, tempering embodiment is following:
With the foregoing description 1 is example; This bearing roller lasso wall thickness is 10.191mm, adopts the superaudio impewdance matching, superaudio frequency 30-50KHZ; After in 13 seconds, being warmed up to 920 ℃; Bearing steel general with quenching liquid in the cooling 11 seconds, at 195 ℃ of tempering 5.5-6h, record raceway face hardness HRC58-60 after the tempering;
With the foregoing description 2 is example; This bearing roller lasso wall thickness is 12.5mm, adopts the superaudio impewdance matching, superaudio frequency 30-50KHZ; In 13 seconds, be warmed up to 930 ℃; Cooled off 12 seconds in the general quenching liquid of bearing steel the back, at 195 ℃ of tempering 6h, records raceway face hardness HRC59-61 after the tempering;
With the foregoing description 3 is example, and this bearing roller lasso wall thickness is 20mm, adopts the superaudio impewdance matching; Superaudio frequency 30-50KHZ was warmed up to 950 ℃ in 15 seconds, cooled off 12 seconds in the general quenching liquid of bearing steel the back; At 195 ℃ of tempering 6h, record raceway face hardness HRC59-61 after the tempering.
The whole last pair roller lasso of road technology carries out grinding, makes its size that meets the requirements.
Claims (1)
1. two hardness roller lasso processing technologys of a bearing steel; Mainly comprise blanking, forcing press forging, spheroidizing, turning processing, quenching, tempering and grinding seven big processing steps, it is characterized in that: said tempering process adopts high tempering and between tempering and grinding process, increases raceway impewdance matching, raceway tempering; Said high tempering temperature range is between 500 ℃-530 ℃, and the case hardness of lasso is at HRC 30-40 after the tempering; Said raceway impewdance matching temperature range is at 900 ℃-950 ℃, surface induction 12-20 heat time heating time second; 195 ℃ of said lasso raceway temperatures, tempering time 5.5-6h, raceway face hardness reaches HRC58-62.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105434278A CN102441768A (en) | 2010-11-15 | 2010-11-15 | Technology for processing dual-hardness roller sleeve ring of bearing steel |
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| CN2010105434278A CN102441768A (en) | 2010-11-15 | 2010-11-15 | Technology for processing dual-hardness roller sleeve ring of bearing steel |
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| CN102441768A true CN102441768A (en) | 2012-05-09 |
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| CN2010105434278A Pending CN102441768A (en) | 2010-11-15 | 2010-11-15 | Technology for processing dual-hardness roller sleeve ring of bearing steel |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
| CN103042363A (en) * | 2012-12-18 | 2013-04-17 | 潍坊鑫陆轴承有限公司 | Method for manufacturing eccentric bearing |
| CN103468915A (en) * | 2013-09-22 | 2013-12-25 | 常州苏特轴承制造有限公司 | Heat treatment method of high-temperature-resistant rolling needle |
| CN103740920A (en) * | 2013-09-12 | 2014-04-23 | 江苏万达特种轴承有限公司 | Double-hardness sprocket wheel |
| CN104057250A (en) * | 2014-06-04 | 2014-09-24 | 安徽省宁国顺昌机械有限公司 | Processing technology for guaranteeing assembling interchangeability of inner and outer rings of revolving support |
| CN104439951A (en) * | 2014-11-15 | 2015-03-25 | 江阴吉爱倍万达精工有限公司 | Machining technology of bearing rings with steps on outer rings |
| CN104972276A (en) * | 2015-06-29 | 2015-10-14 | 如皋市非标轴承有限公司 | Process for processing inner ring and outer ring of wind power bearing |
| CN105127746A (en) * | 2015-09-30 | 2015-12-09 | 戴兆良 | Production process of bearing ring |
| CN105414980A (en) * | 2015-12-10 | 2016-03-23 | 马鞍山华东回转支承有限公司 | Manufacturing method of slewing bearing |
| CN108838623A (en) * | 2018-06-28 | 2018-11-20 | 安庆银亿轴承有限公司 | A kind of processing method of bearing ring |
| CN114054665A (en) * | 2021-11-22 | 2022-02-18 | 中国航发哈尔滨轴承有限公司 | BG801 steel ball forging method |
| CN114871695A (en) * | 2022-04-24 | 2022-08-09 | 中国科学院金属研究所 | M50 steel bearing ring, preparation method thereof and bearing |
| CN115386694A (en) * | 2022-08-08 | 2022-11-25 | 钢铁研究总院有限公司 | Composite heat treatment method for strengthening and toughening core and super-hardening surface of high-carbon bearing steel |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758073B (en) * | 2012-07-18 | 2014-06-25 | 天马轴承集团股份有限公司 | Heat treatment method of bearing |
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
| CN103042363A (en) * | 2012-12-18 | 2013-04-17 | 潍坊鑫陆轴承有限公司 | Method for manufacturing eccentric bearing |
| CN103740920B (en) * | 2013-09-12 | 2016-03-16 | 江苏万达特种轴承有限公司 | Two hardness sprocket wheel |
| CN103740920A (en) * | 2013-09-12 | 2014-04-23 | 江苏万达特种轴承有限公司 | Double-hardness sprocket wheel |
| CN103468915A (en) * | 2013-09-22 | 2013-12-25 | 常州苏特轴承制造有限公司 | Heat treatment method of high-temperature-resistant rolling needle |
| CN104057250A (en) * | 2014-06-04 | 2014-09-24 | 安徽省宁国顺昌机械有限公司 | Processing technology for guaranteeing assembling interchangeability of inner and outer rings of revolving support |
| CN104439951A (en) * | 2014-11-15 | 2015-03-25 | 江阴吉爱倍万达精工有限公司 | Machining technology of bearing rings with steps on outer rings |
| CN104972276A (en) * | 2015-06-29 | 2015-10-14 | 如皋市非标轴承有限公司 | Process for processing inner ring and outer ring of wind power bearing |
| CN105127746A (en) * | 2015-09-30 | 2015-12-09 | 戴兆良 | Production process of bearing ring |
| CN105414980A (en) * | 2015-12-10 | 2016-03-23 | 马鞍山华东回转支承有限公司 | Manufacturing method of slewing bearing |
| CN105414980B (en) * | 2015-12-10 | 2017-05-24 | 马鞍山华东回转支承有限公司 | Manufacturing method of slewing bearing |
| CN108838623A (en) * | 2018-06-28 | 2018-11-20 | 安庆银亿轴承有限公司 | A kind of processing method of bearing ring |
| CN114054665A (en) * | 2021-11-22 | 2022-02-18 | 中国航发哈尔滨轴承有限公司 | BG801 steel ball forging method |
| CN114871695A (en) * | 2022-04-24 | 2022-08-09 | 中国科学院金属研究所 | M50 steel bearing ring, preparation method thereof and bearing |
| CN114871695B (en) * | 2022-04-24 | 2024-02-09 | 中国科学院金属研究所 | M50 steel bearing ring, preparation method thereof and bearing |
| CN115386694A (en) * | 2022-08-08 | 2022-11-25 | 钢铁研究总院有限公司 | Composite heat treatment method for strengthening and toughening core and super-hardening surface of high-carbon bearing steel |
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Application publication date: 20120509 |