QI Yunxin Nei Monggol Institute of Metallic Materials
,
Baotou
,
China QI Yunxin
,
Professor
,
P.O.Box No.4
,
Baotou 014034
,
Nei Monggol
,
China
金属学报(英文版)
The nitride in 30CrNi steel and its composition along boundaries have been studied by means of scanning Auger microprobe.The nitride identified metallographically is Zr(C,N)which contains a small amount of Ti and O.The interface width between the Zr(C,N)and the matrix is about 1.6 μm.An Fe-rich shell is.found on the surface of Zr(C,N)which appeared on the fracture surface.The thickness of shell is 0.1-0.8μm.The Fe concentration of its outmost layer is 3-18 at.-% and decreases exponentially along the depth direction.
关键词:
nitride
,
null
,
null
,
null
,
null
ZHONG Jiaxiang ZHENG Xiuhua XU Zongrui Beijing Institute of Technology
,
Beijing
,
ChinaBAI Dezhong Nei Monggol Machine Works No.2
,
Nei Monggol
,
China Beijing Institute of Technology
,
Beijing 100081
,
China
金属学报(英文版)
Three types of alloy carbides have been observed in tempered steel 4335V:M_3C,M_7C_3 and M_4C_3.The precipitation temperatures are 200—700,400 and 500 ℃ respectively.The com- position,morphologies and distribution patterns of the carbides as well as the relationship be- tween them and as-quenched substructures have been investigated.The influence of the car- bides on the low temperature impact toughness of the steel has also been discussed.
关键词:
steel 4335V
,
null
,
null
