泰州INA轴承钢材料的淬火工艺

所用的泰州INA轴承钢大多是从日本进口的，有些是由中国研制的轴承钢制成，成分相同，加工工艺相似。钢等级为SUJ2。

Most of the Taizhou INA bearing steels used are imported from Japan, some are made of bearing steels developed in China with the same composition and similar processing technology. The steel grade is SUJ2.

在进入热处理过程之前，让我们首先了解什么是退火。什么是硬化？什么是锻炼？为什么会有不同的过程？

Before entering the heat treatment process, let's first understand what annealing is. What is hardening? What is exercise? Why are there different processes?

退火是生产中常用的预热处理工艺。它是一种热处理工艺，其中钢被加热到一个适当的温度一段时间，然后缓慢冷*却，以获得接近*平衡的结构。其目的是消*除或减少铸件、锻件和焊*接件的内应力和化学成分的不均匀性，改*善和调整泰州INA轴承钢的机械和工艺性能，并为我们的旋压工艺准备结构。事实上，我们使用的钢是通过球化退火（加热到750-770度，保持一定时间，缓慢冷*却到600度以下的空气）来处理的。钢的退火工艺包括完全退火、不完全退火、等温退火、球化退火和扩散退火、再结晶退火、应力消*除和脱氢退火。

Annealing is a preheat treatment process commonly used in production. It is a heat treatment process in which steel is heated to an appropriate temperature for a period of time and then slowly cooled to achieve a structure close to * equilibrium. Its purpose is to eliminate or reduce the internal stress and chemical composition inhomogeneity of castings, forgings and welded joints, improve and adjust the mechanical and technological properties of Taizhou INA bearing steel, and prepare the structure for our spinning process. In fact, the steel we use is treated by spheroidizing annealing (heating to 750-770 degrees, holding for a certain time, slowly cooling * but air below 600 degrees). The annealing process of steel includes complete annealing, incomplete annealing, isothermal annealing, spheroidizing annealing and diffusion annealing, recrystallization annealing, stress relief * removal and dehydrogenation annealing.

淬火是一种热处理工艺，其中泰州INA轴承钢在保温后加热到临界点以上，并以高于临界冷*却速率(Vc)的冷*却速率冷*却以获得马氏体或低贝氏体***。

Quenching is a heat treatment process in which Taizhou INA bearing steel is heated to above the critical point after heat preservation and cooled at a cooling * cooling rate higher than the critical cooling * cooling rate (Vc) to obtain martensite or low bainite structure.

回火是一种热处理工艺，其中将淬火钢加热到低于A1的温度一段时间，然后以适当的方式冷*却到室温。它是下一个淬火和热处理工艺，它决定着在役钢的***和性能，关系到工件的使用寿命，因此它是关键工艺。

Tempering is a heat treatment process in which quenched steel is heated to a temperature below A1 for a period of time and then cooled in an appropriate manner to room temperature. It is the next quenching and heat treatment process, which determines the structure and properties of in-service steel, and relates to the service life of the workpiece, so it is the key process.

在了解泰州INA轴承热处理工艺的一些基本知识后，看看我们的滚动轴承热处理工艺。

After knowing some basic knowledge about the heat treatment process of INA bearing in Taizhou, look at our rolling bearing heat treatment process.

真空淬火：其**大的特点是无氧化、无变形、无裂纹。我公司生产的精*密轴承采用真空热处理工艺。日本和国内真空炉都有两个真空室，冷室和热室。轴承钢的加热过程按工艺规定的曲线逐渐加热，**高温度达到840（+10）。然而，对于通过冷*却介质的石油或天*然气冷*却，油温控制在60-80（+100-120）。

Vacuum quenching: It is characterized by no oxidation, no deformation and no cracks. The precision bearing produced by our company adopts vacuum heat treatment process. Both Japanese and domestic vacuum furnaces h***e two vacuum chambers, cold chamber and hot chamber. The heating process of bearing steel is gradually heated according to the curve prescribed by the process, ** the high temperature reaches 840 (+10). However, for oil or natural gas cooled through cold media, the oil temperature is controlled at 60-80 (+100-120).

油回火：根据泰州INA轴承环的特点，采用低温油回火，温度控制在180+10℃，主要目的是降低淬火后的内应力和脆性，稳定尺寸。使用中能保持较高的硬度和耐磨性，避免裂纹或过早损坏。硬度HCR：60-64。

Oil tempering: According to the characteristics of Taizhou INA bearing rings, low temperature oil tempering is adopted and the temperature is controlled at 180 + 10 C. The main purpose is to reduce the internal stress and brittleness after quenching and to stabilize the size. High hardness and wear resistance can be maintained in use to ***oid cracks or premature damage. Hardness HCR:60-64.

文章来自：泰州SKF轴承 www.wh-skf.com

Article from: Taizhou SKF Bearing www.wh-skf.com

文章来自：泰州INA轴承 www.ina-china.cn

Article from: Taizhou INA Bearing www.ina-China.cn

文章来自：泰州NSK轴承 www.klbbearings.com

Article from: Taizhou NSK Bearing www.klbbearings.com

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