Abstract The microstructure of laser melted layer on Cr12MoV steel was re-vealed as austenitic dendrites under observation by TEM and X-ray diffractometer.The interdendritic eutectic carbides together with a little secondary carbides, but nomartensitic transformation were presented. Thus, the hardness of the steel is reducedafter laser melting treatment.
1 尹钟大,李晓东,物理测试,1988;(3) : 8 2 Chen C H, Altstetter C J, Rigsbee J M. Metall Trans, 1984; 15A: 719 3 Andrews K W. J Iron Steel Inst, London. 1965; 203: 72