The influence on brittle of microstructure of laser quenching/nitriding layer
Have studied microstructure of the gas nitriding layer and the laser quenching/nitriding layer using the X-ray diffractometer and the transmission electron microscope to the brittl ofnitriding layer.The results show that the content of Fe3N in composite nitrided layer increased from 14.74% to the 69.45%,while the crisp hard ξ-Fe2N content dropped from 79.95%to 25.03%,Especially the Cr2N particles are much finer and the depth of the nitrided layer increases.There have phase relation,coherence and compatibility between γ-Fe4N and α-Fe.spherical particles of cementite was formed in lower strip bainite,while the γ of gas nitriding diffusion layer is big,the carbide assumes the long strip off and with distributing certain directivity.Brittleness of laser hardening/nitriding layer reduces.
laser quenching nitriding microstructure
Cheng Yiyuan Wang Chengqiang Chen Zizhen Niu Yongjun
China Petroleum Pipeline Scientific Institute, Hebei Langfang 065000, China China petroleum pipeline bureau, Hebei Langfang 065000, China Henan Petroleum Engineering construction Co.Ltd.Henan Nanyang ,473132
国际会议
太原
英文
548-552
2012-06-23（万方平台首次上网日期，不代表论文的发表时间）