Application Research of 15NiMoSiCr10 Steel on Carburizing Needle Valve Nozzle of a Diesel Engine
Author of the article:YANG Huan;RAN Qiyan;WANG Bo;BAO Tao;LIN Wenyuan;ZHOU Guifeng;YU Fasong
Author's Workplace：Key Equipment Technology Center,CNOOC EnerTech Equipment Technology Co.,Ltd.,Shenzhen Co.,Shenzhen 518054,China;Production Department,CNOOC China Ltd.,Shenzhen,Shenzhen 518054,China;Lufeng Oilfield Operation,CNOOC China Ltd.,Shenzhen,Shenzhen 518054,China;Technical Center,Chongqing Hongjiang Machinery Co.,Ltd.,Chongqing 402160,China;National Engineering Laboratory for Marine Power System,Chongqing Hongjiang Machinery Co.,Ltd.,Chongqing 402160,China
Key Words：diesel engine 15NiMoSiCr10 steel high tempering stability carburizing needle nozzle
Abstract：The 15NiMoSiCr10 was a new steel used for producing diesel engine carburizing needle valve nozzle.The chemical composition,microstructure and mechanical properties of the steel were tested and analyzed.The optimum heat treatment process was discussed and the tempering stability of 15NiMoSiCr10 and traditional 18CrNi8 steel was compared.The results show that when the tempering temperature is 300℃,the surface hardness of 15NiMoSiCr10 needle valve can reach 715 HV1(61 HRC)with high tempering resistance and good microstructure.15NiMoSiCr10 can meet the requirements of new high-end diesel engine for the use of needle valve material,the needle valve nozzle material open up a new direction.
