Bearing steel: 100CrMnSi6-4
● Features and Scope:
GCr15 steel is based on an appropriate increase in Si, Mn content in order to improve its hardenability and elastic limit, wear better than GCr15. Manufacture of rolling element applicable size range than GCr15 large, mainly for the manufacture of wall thickness> 12mm, outer diameter> 280mm ball bearing rings diameter> 50mm; conical, cylindrical and spherical roller diameter> 22mm and all sizes of needle .
● Chemical Composition:
Carbon C: 0.95 ~ 1.05
Si Si: 0.40 ~ 0.65
Mn Mn: 0.90 ~ 1.20
Sulfur S: ≤0.020
Phosphorus P: ≤0.027
Chromium Cr: 1.30 ~ 1.65
Ni Ni: ≤0.30
Copper Cu: ≤0.25
● Mechanical Properties:
Tensile strength σb (MPa): 1831
Impact energy Akv (J): 23
Hardness: 65HRC
Sample size: a sample
● Heat treatment and microstructure specifications:
Heat Treatment Specification: 830 ~ 840 ℃ quenching, oil cooling; 160 ℃ tempering 3h.
Microstructure: tempered martensite.