CN102925657A - Rolling deformation quenching composite reinforcing method of middle carbon alloyed steel bearing ring piece - Google Patents
Rolling deformation quenching composite reinforcing method of middle carbon alloyed steel bearing ring piece Download PDFInfo
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Abstract
The invention relates to the bearing manufacture technology, and discloses a rolling deformation quenching composite reinforcing method of a middle carbon alloyed steel bearing ring piece. The rolling deformation quenching composite reinforcing method is characterized by comprising the following steps: (1) material section heating: controlling the heating temperature to be 1100-1200 DEG C; (2) forging blanking: machining a heated material section into a ring blank with the required dimension through upsetting, punching and slug punching on a pressure machine, wherein the final forging temperature of the ring blank is controlled to be 950-1100 DEG C; (3) hot rolling: performing hot rolling on the manufactured ring blank on a loop rolling machine to machine the ring blank into the ring piece with the required dimension, wherein the hot rolling forming temperature is controlled to be 860-950 DEG C; (4) quenching: placing the rolled ring piece at the temperature of 850 DEG C, and placing the rolled ring piece in a quenching pool for cooling, wherein the cooling water temperature is lower than 50 DEG C, and the cooling time is 2-15 minutes; and (5) high-temperature tempering: performing high-temperature tempering treatment on the quenched ring piece, wherein the tempering temperature is controlled to be 600-670 DEG C, and the heat preservation time is 1-6 hours. By means of the rolling deformation quenching composite reinforcing method, product performance is improved, production efficiency is improved, and production cost is reduced.
Description
Technical field
The present invention relates to a kind of bearing manufacturing technology, be specifically related to a kind of medium carbon alloy steel bearing ring parts rolling deformation quenching composite strengthening method.
Background technology
Bearing ring parts is the typical carrying of equipment manufacture and the crucial mechanical component of transmission.The medium carbon alloy steel bearing ring parts of carbon content 0.25wt%～0.6wt% has extensive and important application in the field big machinery equipments such as wind-powered electricity generation, nuclear power, metallurgy, petrochemical industry.At present, the general manufacturing process flow of medium carbon alloy steel bearing ring parts is: material section heating-forging base-hot rolling-air cooling-quenching-tempering.In this technological process, the ring that hot rolling is shaped usually need to be placed and was cooled to room temperature in tens of hours, and then heating quenching, a large amount of time and the energy have been wasted, increased the material scaling loss, and Hot-rolled Rotary is subjected to internal strain energy and temperature action cooling off and reheating in the austenitization, the alligatoring of growing up of the small grains of easily impelling rolling recrystallize to form causes the ring mechanical properties decrease.
Summary of the invention
For above present situation, the object of the present invention is to provide a kind of medium carbon alloy steel bearing ring parts rolling deformation quenching composite strengthening method, can effectively reduce production costs, enhance product performance.
To achieve these goals, technical scheme of the present invention is: a kind of medium carbon alloy steel bearing ring parts rolling deformation quenching composite strengthening method is characterized in that it may further comprise the steps:
(1) material section heating: adopt continuous furnace that the material section is heated; Cause austenite crystal thick in order to prevent that material section Heating temperature is too high, and a material section Heating temperature crosses low and cause and separate out ferrite network in the follow-up forging deformation, heating and temperature control is at 1100～1200 ℃;
(2) forge base: the material section is made specified dimension ring base through jumping-up, punching, punching the wad after will heating on pressing machine; Impel carbide network to separate out in order to prevent that final forging temperature is too high, and final forging temperature is excessively low causes encircling the base forging crack, ring base final forging temperature is controlled at 950～1100 ℃;
(3) hot rolling: the ring base hot rolling on machine for rolling ring that will make is configured as the specified dimension ring; The ring temperature is controlled at 860～950 ℃ after the hot rolling, prevents from because of the ring excess Temperature promoting recrystal grain to grow up so that the front ring of quenching is long storage period, reduces intensity, hardness and impelling strength;
(4) quench: the ring that will roll into shape is placed to 850 ℃, puts into the cooling of quenching pond, and coolant water temperature is below 50 ℃, and be 2～15 minutes cooling time;
(5) high tempering: ring has higher resistance to tempering after the hot rolling direct quenching, and tempering temperature is low will significantly to reduce ring impelling strength; Ring after quenching is carried out high tempering process, tempering temperature is controlled at 600～670 ℃, and soaking time is 1～6 hour.
The described material section of step (1) is 42CrMo steel material section, 50Mn steel material section, Q345E steel material section or 35CrMo steel material section.
The invention has the beneficial effects as follows: by the heating of material section, forge base, hot rolling, Temperature Matching design and the process stabilization of quenching and each operation of tempering are connected control, make bearing ring parts obtain under the condition of thin uniform grain grain tissue and reasonable streamline at rolling deformation, directly utilize the deformation waste heat phase transformation strengthening that quenches, can suppress austenite recrystallization crystal grain and under deformation energy and temperature action, continue the alligatoring of growing up, can obtain the tiny lath martensite of martensite bundle after the quenching, and carbide is separated out simultaneously along between crystal boundary and martensite lath, increase the distribution of carbides dispersity, improved the intensity of bearing ring parts, hardness, the mechanical properties such as impelling strength have improved product performance.And rolling waste heat direct quenching is compared traditional rolling rear air cooling to the room temperature quench in furnace, has shortened technical process, has saved heating energy source, has reduced material and has reheated oxidation loss, has improved production efficiency, has reduced production cost.
Description of drawings
Fig. 1 is specific embodiment of the invention 42CrMo steel loop spare material section heating process graphic representation.
Fig. 2 is specific embodiment of the invention 42CrMo steel loop spare quenching technology graphic representation.
Fig. 3 is specific embodiment of the invention 42CrMo steel loop spare high-temperature tempering process graphic representation.
Fig. 4 is specific embodiment of the invention 50Mn steel loop spare material section heating process graphic representation.
Fig. 5 is specific embodiment of the invention 50Mn steel loop spare quenching technology graphic representation.
Fig. 6 is specific embodiment of the invention 50Mn steel loop spare high-temperature tempering process graphic representation.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1
Take the most frequently used 42CrMo steel bearing ring parts as example, its rolling deformation quenching composite strengthening method is realized as follows:
(1) blank heating: adopt continuous furnace that the material section is heated, 42CrMo steel material section is heated to 1110 ± 10 ℃.
(2) forge base: material section jumping-up, punching, punching the wad on pressing machine made the ring base of specified dimension after will heating, and ring base final forging temperature is controlled at 960 ± 10 ℃.
(3) hot rolling: the roll forming on machine for rolling ring of the ring base that will make is the specified dimension ring, and control machine for rolling ring power energy in the operation of rolling makes ring fast distortion in the rolling temperature scope, and hot rolling shaping ring temperature is controlled at 870 ± 10 ℃.
(4) quench: the hot rolling ring that is shaped is placed to 850 ℃, then puts into 50 ℃ of quenching ponds coolings 5 minutes.
(5) high tempering: ring is carried out 650 ± 10 ℃, insulation high tempering processing in 6 hours after will quenching.
The heating of material section, ring quenching, ring high tempering curve are respectively such as Fig. 1, Fig. 2, shown in Figure 3.
To the sampling of the 42CrMo steel bearing ring parts different sites after the tempering, carry out metallographic structure and Mechanics Performance Testing.It is 6 grades that metaloscope is measured the sample mean grain size number.Each sample mechanical property test test data mean value such as table 1.
Table 1 42CrMo steel bearing ring parts sample mechanical experimental results
Embodiment 2
Take 50Mn steel bearing ring parts as example, its rolling deformation quenching composite strengthening method is realized as follows:
(1) blank heating: adopt continuous furnace that the material section is heated, 50Mn steel material section is heated to 1150 ± 10 ℃.
(2) forge base: material section jumping-up, punching, punching the wad on pressing machine made the ring base of specified dimension after will heating, and ring base final forging temperature is controlled at 1000 ± 10 ℃.
(3) hot rolling: the roll forming on machine for rolling ring of the ring base that will make is the specified dimension ring, and control machine for rolling ring power energy in the operation of rolling makes ring fast distortion in the rolling temperature scope, and hot rolling shaping ring temperature is controlled at 900 ± 10 ℃.
(4) quench: the hot rolling ring that is shaped is placed to 850 ℃, then puts into 50 ℃ of quenching ponds coolings 8 minutes.
(5) high tempering: ring is carried out 660 ± 10 ℃, insulation high tempering processing in 5 hours after will quenching.
The heating of material section, ring quenching, ring high tempering curve are respectively such as Fig. 4, Fig. 5, shown in Figure 6.
To the sampling of the 50Mn steel bearing ring parts different sites after the tempering, carry out metallographic structure and Mechanics Performance Testing.It is 6.5 grades that metaloscope is measured the sample mean grain size number.Each sample mechanical property test test data mean value such as table 2.
Table 2 50Mn steel bearing ring parts sample mechanical experimental results
Above-mentioned example explanation: adopt the resulting bearing ring parts of the technology of the present invention, crystal grain is tiny, and intensity, hardness, plasticity and impelling strength have all obtained effective lifting, illustrate to have improved product performance.
The technology of the present invention also is applicable to other medium carbon alloy steel bearing ring parts such as Q345E or 35CrMo, and its roll forming technique is identical with above-mentioned example, and effect is also identical, at this particularize embodiment not.
The upper limit of the temperature of each step of the present invention, lower limit value and the upper limit of time, lower limit value can both realize purpose of the present invention, at this particularize embodiment not.
Claims (2)
1. medium carbon alloy steel bearing ring parts rolling deformation quenching composite strengthening method is characterized in that it may further comprise the steps:
(1) material section heating: adopt continuous furnace that the material section is heated; Heating and temperature control is at 1100～1200 ℃;
(2) forge base: the material section is made specified dimension ring base through jumping-up, punching, punching the wad after will heating on pressing machine; Ring base final forging temperature is controlled at 950～1100 ℃;
(3) hot rolling: the ring base hot rolling on machine for rolling ring that will make is configured as the specified dimension ring; The ring temperature is controlled at 860～950 ℃ after the hot rolling;
(4) quench: the ring that will roll into shape is placed to 850 ℃, puts into the cooling of quenching pond, and coolant water temperature is below 50 ℃, and be 2～15 minutes cooling time;
(5) high tempering: the ring after will quenching is carried out the high tempering processing, and tempering temperature is controlled at 600～670 ℃, and soaking time is 1～6 hour.
2. described a kind of medium carbon alloy steel bearing ring parts rolling deformation quenching composite strengthening method according to claim 1, it is characterized in that: the described material section of step (1) is 42CrMo steel material section, 50Mn steel material section, Q345E steel material section or 35CrMo steel material section.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341728A (en) * | 2013-06-28 | 2013-10-09 | 武汉理工大学 | Bearing ring organization refining-homogenizing rolling-cooling control method |
| CN103421940A (en) * | 2013-09-05 | 2013-12-04 | 中原特钢股份有限公司 | Technological method for AISI4140 and AISI 4340 constructional steel forged piece quenching and tempering through one-time thermal cycling |
| CN104862460A (en) * | 2015-05-22 | 2015-08-26 | 人本集团有限公司 | Complex heat treatment technology of high-carbon-chromium bearing steel |
| CN106011395A (en) * | 2016-07-12 | 2016-10-12 | 山东鲁联机械制造有限公司 | Heat treatment technology of alloy structure steel through remnant forging thermal quenching |
| CN106119476A (en) * | 2016-06-20 | 2016-11-16 | 安徽省瑞杰锻造有限责任公司 | A kind of hardening and tempering process of 42CrMo large forgings |
| CN106424158A (en) * | 2016-09-29 | 2017-02-22 | 西宁特殊钢股份有限公司 | Rolling method capable of reducing as-rolled hardness of 42CrMo steel |
| CN106984787A (en) * | 2017-04-21 | 2017-07-28 | 太原科技大学 | Shaping and quenching, tempering strengthening and toughening treatment method are rolled in a kind of 25Mn steel flanges part casting |
| CN108823384A (en) * | 2018-07-10 | 2018-11-16 | 无锡派克新材料科技股份有限公司 | A kind of large-size stainless steel ring high temperature forging deformation method for grain refinement |
| CN111705187A (en) * | 2020-07-02 | 2020-09-25 | 南京迪威尔高端制造股份有限公司 | Manufacturing method for reducing stress cracks of 4340 steel ring piece |
| CN113981178A (en) * | 2021-11-17 | 2022-01-28 | 通裕重工股份有限公司 | Heat treatment method of medium-carbon low-alloy steel shaft forging |
| CN114654169A (en) * | 2022-03-14 | 2022-06-24 | 宝武集团马钢轨交材料科技有限公司 | Manufacturing method of heavy-duty wheel for railway wagon |
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| CN102699635A (en) * | 2012-06-18 | 2012-10-03 | 西南大学 | Liquid die-forging and rolling composite forming method for bearing ring piece |
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| CN101576123A (en) * | 2008-05-09 | 2009-11-11 | 嵊州市美亚特种轴承厂 | Process for manufacturing bearing ring |
| JP2010024492A (en) * | 2008-07-18 | 2010-02-04 | Ntn Corp | Heat-treatment method for steel, method for manufacturing machine component, and machine component |
| CN101947630A (en) * | 2010-09-17 | 2011-01-19 | 洛阳轴研科技股份有限公司 | Controlled-forging controlled-cooling processing technology of bearing ring prepared by GCr15 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341728A (en) * | 2013-06-28 | 2013-10-09 | 武汉理工大学 | Bearing ring organization refining-homogenizing rolling-cooling control method |
| CN103341728B (en) * | 2013-06-28 | 2015-12-09 | 武汉理工大学 | A kind of bearer ring organizes thin homogenize controlled rolling and controlled cooling method |
| CN103421940A (en) * | 2013-09-05 | 2013-12-04 | 中原特钢股份有限公司 | Technological method for AISI4140 and AISI 4340 constructional steel forged piece quenching and tempering through one-time thermal cycling |
| CN103421940B (en) * | 2013-09-05 | 2016-01-20 | 中原特钢股份有限公司 | A kind ofly a thermal cycling is utilized to carry out modified processing method to AISI4140 and AISI4340 structure iron forging |
| CN104862460A (en) * | 2015-05-22 | 2015-08-26 | 人本集团有限公司 | Complex heat treatment technology of high-carbon-chromium bearing steel |
| CN106119476A (en) * | 2016-06-20 | 2016-11-16 | 安徽省瑞杰锻造有限责任公司 | A kind of hardening and tempering process of 42CrMo large forgings |
| CN106119476B (en) * | 2016-06-20 | 2018-04-24 | 安徽省瑞杰锻造有限责任公司 | A kind of hardening and tempering process of 42CrMo large forgings |
| CN106011395A (en) * | 2016-07-12 | 2016-10-12 | 山东鲁联机械制造有限公司 | Heat treatment technology of alloy structure steel through remnant forging thermal quenching |
| CN106424158A (en) * | 2016-09-29 | 2017-02-22 | 西宁特殊钢股份有限公司 | Rolling method capable of reducing as-rolled hardness of 42CrMo steel |
| CN106984787A (en) * | 2017-04-21 | 2017-07-28 | 太原科技大学 | Shaping and quenching, tempering strengthening and toughening treatment method are rolled in a kind of 25Mn steel flanges part casting |
| CN106984787B (en) * | 2017-04-21 | 2019-03-05 | 太原科技大学 | Forming and quenching, tempering strengthening and toughening treatment method are rolled in a kind of casting of 25Mn steel flange part |
| CN108823384A (en) * | 2018-07-10 | 2018-11-16 | 无锡派克新材料科技股份有限公司 | A kind of large-size stainless steel ring high temperature forging deformation method for grain refinement |
| CN111705187A (en) * | 2020-07-02 | 2020-09-25 | 南京迪威尔高端制造股份有限公司 | Manufacturing method for reducing stress cracks of 4340 steel ring piece |
| CN113981178A (en) * | 2021-11-17 | 2022-01-28 | 通裕重工股份有限公司 | Heat treatment method of medium-carbon low-alloy steel shaft forging |
| CN114654169A (en) * | 2022-03-14 | 2022-06-24 | 宝武集团马钢轨交材料科技有限公司 | Manufacturing method of heavy-duty wheel for railway wagon |
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Application publication date: 20130213 |