材料期刊网

SAM ANALYSIS OF NITRIDE IN 30CrNi STEEL

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

CARBIDES IN STEEL 4335 V

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

Mineralogical and Petrological Studies on Carbonatite Dykes in Bayan Ebo,Nei Mongol,China and Their Implication to Rare Earth Mineralization

安建平 , 陈靠山 , 周燮

中国稀土学报

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