Improving the cleanliness of bearing steel, especially reducing the oxygen content in the steel, can significantly extend the life of the bearing. The US Naval Research Institute (NSP) conducted a 650°C warm processing test on 52100 steel and showed that no fracture occurred at a true strain of 2.

Developed high-frequency hardening bearing steel, using ordinary medium carbon steel or medium carbon manganese, chromium steel, through high frequency heating and quenching to replace ordinary bearing steel, which not only simplifies the production process, reduces costs, and increases the service life. In the late 1980s, the advanced level of Japan's Sanyo Special Steel Company was 5.

Due to the increasing use of bearings in environments with high temperature, corrosion, and harsh lubrication conditions, bearing steels such as M50 (CrMo4V) and 440C (9Cr18Mo) ​​used in the past can no longer meet the requirements of use. After rolling, air cooling and short-time annealing are adopted, or the spheroidizing annealing process is completely eliminated, and qualified bearings can be obtained Steel organization.

In terms of heat treatment, progress has been made in improving the qualit ynon-standard bearings suppliers of spheroidizing annealing, obtaining fine, uniform and spherical carbides, and shortening the annealing time or eliminating the spheroidizing annealing process In the guidance work, the division of labor is responsible for guidance. The main content of the search is based on the principle of adhering to the 'three key points', and mainly searches for the possibility of subjective and deliberate embezzlement, misappropriation, or the loss of company assets during the operation of power. It is a quantitative change.　　　　

The activity implementation plan made detailed arrangements for the procedures and methods for finding risk points, as well as specific implementation steps and time limits.　　　　 

Megosztás a facebookon