Analysis of Abnormal Bright Spot on Gas Nitriding Surface
The parts of the surface appeared local abnormal bright spots after gas nitriding,with obvious characteristics of metallic luster,dot-shaped block-shaped distribution.The abnormal bright spot defect and normal area were observed and detected by means of metalloscope,scanning electron microscope and dimensional hardness tester,respectively.The results indicated that the content of N in the bright spot defect area was lower than that in the normal area,the microstructure of the matrix was the same,the microhardness of the surface in the normal area was slightly higher than that of the bright spot defect.The causes of abnormal bright spots on nitriding surface were analyzed and the propose measures were put forward.
NETL
NSTL
万方数据
