GCr15 is a high carbon chromium bearing steel with less alloy content. After quenching and low temperature tempering, it has the characteristics of high hardness, uniform microstructure, good wear resistance and good contact fatigue performance. GCr15 is often used to manufacture internal combustion engines, electric locomotives, machine tools, tractors, steel rolling equipment, drilling machines, railway vehicles, etc. GCr15 steel GCr15 steel can be used to manufacture wall thickness ≤ 12mm, outer diameter ≤ 250mm various bearing rings are also used for rolling elements with a wide size range, such as steel balls, tapered rollers, needles, etc.
GCr15 steel is also used to manufacture molds, precision measuring tools and other mechanical parts requiring high wear resistance, high elastic limit and high contact fatigue strength.
The normal quenching heating temperature of GCr15 steel is 830-860 ℃. If oil cooling is used, the optimum quenching heating temperature is 840 ℃, and the hardness after quenching can reach 63-65 HRC. （gcr15ShiShenMeCaiZhi）