Effect of Deep Cryogenic Treatment on Microstructures and Mechanical Propery of GCr15 Steel

Microstructures,mechanical property,and wear resistance of GCr15 steel with different deep cryogenic treatment(DCT) have been investigated in this paper.The results revealed that the deep cryogenic treatment could improve the hardness of GCr15 steel variously.The impact toughness values of GCr15 steel which were tempered at 180℃ for 8h after deep cryogenic treatment were lower.The wear resistance of GCr15 steel could be enhanced and the remains austenite content decreased obviously by various deep cryogenic treatment.After 6h deep cryogenic treatment,its values of mass lost ratio and remains austenitic content were decreased significant to 30% and 81%,respectively.