Introduction To Ball Screw Material Bearing Steel

Ball screw is a kind of transmission element that is widely used at present. It exists in many mechanical equipment, and it can convert rotary motion into linear motion, or convert linear motion into rotary motion. So what material is the ball screw made of? At present, the most common ones are mainly bearing steel.

Bearing steel is the steel used to make balls, rollers, and bearing rings. Bearing steel has high and uniform hardness and wear resistance, as well as a high elastic limit. The requirements for the uniformity of the chemical composition of the bearing steel, the content and distribution of non-metallic inclusions, and the distribution of carbides are very strict, and it is one of the most stringent steel grades in all steel production. In 1976, the International Organization for Standardization ISO included some general bearing steel grades into international standards, and divided bearing steels into four categories: fully hardened bearing steel, surface hardened bearing steel, stainless bearing steel, and high temperature bearing steel. A total of 17 Steel No.

Bearing steel, also known as high carbon chromium steel, has a carbon content Wc of about 1% and a chromium content Wcr of 0.5%-1.65%. Bearing steel is divided into six categories: high carbon chromium bearing steel, chromium-free bearing steel, carburized bearing steel, stainless bearing steel, medium and high temperature bearing steel and antimagnetic bearing steel.

High-carbon chromium bearing steel GCr15 is the most productive bearing steel in the world. Its carbon content Wc is about 1%, and its chromium content Wcr is about 1.5%. Since its birth in 1901, the main components have remained basically unchanged for more than 100 years. With the advancement of science and technology, the research work continues, and the product quality continues to improve, accounting for more than 80% of the world's total production of bearing steel. So that if there is no special description for bearing steel, it refers to GCr15.

my country has produced high carbon chromium stainless bearing steel, the main steel grade is 9Cr18; carburized bearing steel, the main steel grade is G20CrMo; chromium bearing steel, the main steel grade is GCr15.

Although there is still a slight gap between domestic ball screws and foreign brands, I believe that we will continue to improve and surpass them.