30CrNi钢中氮化物的扫描Auger探针分析

SAM ANALYSIS OF NITRIDE IN 30CrNi STEEL

用SAM研究了30CrNi钢中氮化物及其界面的组成。结果表明,氮化物夹杂为含有少量Ti,O的Zr(C,N)。Zr(C,N)与基体的界面宽度约为1.6μm。断口上显露的Zr(C,N)夹杂表面存在着富Fe外壳,壳的厚度在0.1—0.8μm之间,在最表层Fe的浓度为3-18at.-％,且沿深度方向呈指数下降。

The nitride in 30CrNi steel and its composition along boundaries havebeen studied by means of scanning Auger microprobe. The nitride inclusion was id-entified metallographically as Zr(C,N) containing a small amounts of Ti and O.The interfacial boundary width between the Zr(C,N) and the matrix is about 1.6μm.An Fe-rich shell is found on the fracture surface at which the Zr(C,N) appeared.The thickness of the shell is 0.1-0.8μm. The Fe concentration of its outmost layeris 3-18 at. -%, and decreases exponeatially along the depth direction.