阅读说明：本技术 一种高碳铬轴承钢制轴承零件的感应淬火工艺 (Induction quenching process for steel bearing part of high-carbon chromium bearing ) 是由 张春宝 曹海军 于 2019-11-05 设计创作，主要内容包括：本发明的一种高碳铬轴承钢制轴承零件的感应淬火工艺,涉及轴承生产领域,包括如下步骤：S1、将高碳铬轴承钢制轴承零件放入第一加热设备中进行预加热；S2、将高碳铬轴承钢制轴承零件移入第二加热设备中进行加热；S3、将高碳铬轴承钢制轴承零件移入第三加热设备中进行第一次均温加热；S4、将高碳铬轴承钢制轴承零件移入第四加热设备中进行第二次均温加热；S5、将高碳铬轴承钢制轴承零件移入第五加热设备中进行第三次均温加热；S6、将高碳铬轴承钢制轴承零件移入第六加热设备中进行第四次均温加热；S7、转入压模淬火设备进行压模淬火；S8、进行清洗、回火、质量检验。本发明加工得到的轴承零件寿命长、尺寸精度高。(The invention discloses an induction quenching process of a high-carbon chromium bearing steel bearing part, which relates to the field of bearing production and comprises the following steps: s1, placing the high-carbon chromium bearing steel bearing part into first heating equipment for preheating; s2, moving the high-carbon chromium bearing steel bearing part into second heating equipment for heating; s3, moving the high-carbon chromium bearing steel bearing part into third heating equipment for primary temperature equalization heating; s4, moving the high-carbon chromium bearing steel bearing part into fourth heating equipment for secondary temperature equalization heating; s5, moving the high-carbon chromium bearing steel bearing part into fifth heating equipment for third temperature equalization heating; s6, moving the high-carbon chromium bearing steel bearing part into sixth heating equipment for fourth temperature equalization heating; s7, transferring the blank into die quenching equipment for die quenching; and S8, cleaning, tempering and quality inspection. The bearing part processed by the invention has long service life and high dimensional precision.)

1. An induction quenching process for a high-carbon chromium bearing steel bearing part is characterized by comprising the following steps of: the method comprises the following steps: s1, placing the high-carbon chromium bearing steel bearing part into first heating equipment for preheating until the temperature of the outer surface of the high-carbon chromium bearing steel bearing part reaches a first temperature value, wherein the range of the first temperature value is 760 plus 800 ℃; s2, moving the high-carbon chromium bearing steel bearing part into second heating equipment for heating until the temperature of the outer surface of the high-carbon chromium bearing steel bearing part reaches a second temperature value, wherein the range of the second temperature value is 820-; s3, moving the high-carbon chromium bearing steel bearing part into third heating equipment for first temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a third temperature value, wherein the range of the third temperature value is 820-; s4, moving the high-carbon chromium bearing steel bearing part into fourth heating equipment for second temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a fourth temperature value, wherein the range of the fourth temperature value is 820-; s5, moving the high-carbon chromium bearing steel bearing part into fifth heating equipment for third temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a fifth temperature value, wherein the range of the fifth temperature value is 820-; s6, moving the high-carbon chromium bearing steel bearing part into sixth heating equipment for fourth temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a sixth temperature value, wherein the range of the sixth temperature value is 820-; s7, transferring the high-carbon chromium bearing steel bearing part into a die-pressing quenching device for die-pressing quenching; and S8, cleaning, tempering and quality inspection are carried out on the quenched high-carbon chromium bearing steel bearing parts.

2. The induction hardening process of claim 1, wherein the first heating device, the second heating device, the third heating device, the fourth heating device, the fifth heating device, and the sixth heating device are induction heating devices.

3. The induction quenching process of claim 1, wherein the third, fourth, fifth, and sixth temperature values increase in sequence.

4. The induction quenching process of claim 3, wherein the third temperature value, the fourth temperature value, the fifth temperature value and the sixth temperature value are sequentially increased by 10 ℃.

5. The induction quenching process of any one of claims 1 to 4, wherein the high carbon chromium bearing steel bearing part is a high carbon chromium bearing steel bearing ring.

Technical Field

The invention relates to the field of bearing production and processing, and in particular relates to an induction quenching process for a high-carbon chromium bearing steel bearing part.

Background

At present, most of high-carbon chromium bearing steel is produced by a mesh belt furnace, a rod furnace and a multipurpose furnace, and many light, thin-wall bearings are produced by the above furnace types, but the high-carbon chromium bearing steel bearing ring produced by the existing method is suddenly heated and quenched in the quenching process, pearlite in the bearing ring cannot be fully converted into austenite, and the service life of the manufactured bearing ring is short; and the deformation of the steel bearing ring of the high-carbon chromium bearing produced by the method can not meet the technical requirements.

Disclosure of Invention

The invention aims to make up for the defects in the prior art, and provides an induction quenching process for a high-carbon chromium bearing steel bearing part, which improves the structure quality of the manufactured bearing part and reduces the deformation in quenching processing.

The technical scheme of the invention is as follows: an induction quenching process for a high-carbon chromium bearing steel bearing part is characterized by comprising the following steps of: the method comprises the following steps: s1, placing the high-carbon chromium bearing steel bearing part into first heating equipment for preheating until the temperature of the outer surface of the high-carbon chromium bearing steel bearing part reaches a first temperature value, wherein the range of the first temperature value is 760 plus 800 ℃; s2, moving the high-carbon chromium bearing steel bearing part into second heating equipment for heating until the temperature of the outer surface of the high-carbon chromium bearing steel bearing part reaches a second temperature value, wherein the range of the second temperature value is 820-; s3, moving the high-carbon chromium bearing steel bearing part into third heating equipment for first temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a third temperature value, wherein the range of the third temperature value is 820-; s4, moving the high-carbon chromium bearing steel bearing part into fourth heating equipment for second temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a fourth temperature value, wherein the range of the fourth temperature value is 820-; s5, moving the high-carbon chromium bearing steel bearing part into fifth heating equipment for third temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a fifth temperature value, wherein the range of the fifth temperature value is 820-; s6, moving the high-carbon chromium bearing steel bearing part into sixth heating equipment for fourth temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a sixth temperature value, wherein the range of the sixth temperature value is 820-; s7, transferring the high-carbon chromium bearing steel bearing part into a die-pressing quenching device for die-pressing quenching; and S8, cleaning, tempering and quality inspection are carried out on the quenched high-carbon chromium bearing steel bearing parts.

Furthermore, the first heating device, the second heating device, the third heating device, the fourth heating device, the fifth heating device and the sixth heating device are induction heating devices.

Further, the third temperature value, the fourth temperature value, the fifth temperature value and the sixth temperature value are sequentially increased.

Further, the third temperature value, the fourth temperature value, the fifth temperature value and the sixth temperature value are sequentially increased by 10 ℃.

Further, the high-carbon chromium bearing steel bearing part is a high-carbon chromium bearing steel bearing ring.

The invention has the beneficial effects that: the method comprises the steps of preheating a high-carbon chromium bearing steel bearing part by adopting first heating equipment, heating the high-carbon chromium bearing steel bearing part by adopting second heating equipment, uniformly heating the high-carbon chromium bearing steel bearing part by adopting third heating equipment for the first time, uniformly heating the high-carbon chromium bearing steel bearing part by adopting fourth heating equipment for the second time, uniformly heating the high-carbon chromium bearing steel bearing part by adopting fifth heating equipment for the third time, uniformly heating the high-carbon chromium bearing steel bearing part by adopting fifth heating equipment for the fourth time, and uniformly heating the high-carbon chromium bearing steel bearing part by adopting sixth heating equipment for the fourth time, wherein the temperature of each heating step is adjusted by setting the power of different heating equipment, so that the heating rate and the uniform temperature rate of the bearing part are reasonable, when the bearing part is converted from pearlite to austenite, the conversion rate is moderate, the temperature of the surface and core tissues are uniform, carbides are fully fused into austenite, the carbon content of the austenite is, the structure is more refined, and the service life is prolonged; in addition, the press die quenching equipment is adopted to carry out press die quenching on the bearing part, the deformation of quenching processing of the bearing part is small, and the size precision of the quenched bearing part is high.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the present invention will be briefly introduced below, and it is apparent that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a flow chart of the induction quenching process of the high-carbon chromium bearing steel bearing part of the invention.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

As shown in fig. 1, an induction quenching process for a high-carbon chromium bearing steel bearing part comprises the following steps: s1, placing the high-carbon chromium bearing steel bearing part into first heating equipment for preheating until the temperature of the outer surface of the high-carbon chromium bearing steel bearing part reaches a first temperature value, wherein the range of the first temperature value is 760 plus 800 ℃; s2, moving the high-carbon chromium bearing steel bearing part into second heating equipment for heating until the temperature of the outer surface of the high-carbon chromium bearing steel bearing part reaches a second temperature value, wherein the range of the second temperature value is 820-; s3, moving the high-carbon chromium bearing steel bearing part into third heating equipment for first temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a third temperature value, wherein the range of the third temperature value is 820-; s4, moving the high-carbon chromium bearing steel bearing part into fourth heating equipment for second temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a fourth temperature value, wherein the range of the fourth temperature value is 820-; s5, moving the high-carbon chromium bearing steel bearing part into fifth heating equipment for third temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a fifth temperature value, wherein the range of the fifth temperature value is 820-; s6, moving the high-carbon chromium bearing steel bearing part into sixth heating equipment for fourth temperature equalization heating until the outer surface temperature and the core temperature of the high-carbon chromium bearing steel bearing part reach a sixth temperature value, wherein the range of the sixth temperature value is 820-; s7, transferring the high-carbon chromium bearing steel bearing part into a die-pressing quenching device for die-pressing quenching; and S8, cleaning, tempering and quality inspection are carried out on the quenched high-carbon chromium bearing steel bearing parts.

The invention adopts a first heating device to preheat a high-carbon chromium bearing steel bearing part, a second heating device to heat the high-carbon chromium bearing steel bearing part, a third heating device to heat the high-carbon chromium bearing steel bearing part at a first uniform temperature, a fourth heating device to heat the high-carbon chromium bearing steel bearing part at a second uniform temperature, a fifth heating device to heat the high-carbon chromium bearing steel bearing part at a third uniform temperature and a sixth heating device to heat the high-carbon chromium bearing steel bearing part at a fourth uniform temperature, the temperature of each heating step is adjusted by setting the power of different heating devices, the heating rate and the uniform temperature rate of the bearing part are reasonable, when the bearing part is transformed from pearlite to austenite, the transformation rate is moderate, the temperature of the surface and the core tissues is uniform, carbide is fully fused into austenite, the carbon content of the austenite is increased, when quenching is carried out, the tissues are transformed more fully, the structure is more refined, and the service life is prolonged; in addition, the press die quenching equipment is adopted to carry out press die quenching on the bearing part, the deformation of quenching processing of the bearing part is small, and the size precision of the quenched bearing part is high.

Optionally, the first heating device, the second heating device, the third heating device, the fourth heating device, the fifth heating device and the sixth heating device are induction heating devices, and heating power and heating temperature are easy to control.

Preferably, the third temperature value, the fourth temperature value, the fifth temperature value and the sixth temperature value are increased in sequence. Further, the third temperature value, the fourth temperature value, the fifth temperature value and the sixth temperature value are sequentially increased by 10 ℃. The temperature setting can ensure that the pearlite to austenite structure of the bearing part is transformed more fully, the structure is more refined, and the service life of the processed bearing part is further prolonged.

Optionally, the high-carbon chromium bearing steel bearing part is a high-carbon chromium bearing steel bearing ring.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.