Xianzhang BU Fine Mech.Mater.and Technol.Dept.
,
Changchun Institute of Optics and Fine Mechanics
,
Changchun
,
130022
,
ChinaHongying WANG Zhang LI Jiandong HU Microanalysis Center
,
Jilin University of Technology
,
Changchun
,
130025
,
China
材料科学技术（英）
The microstructure of the laser melted 1.0%C tool steel have been investigated.The region affected by the laser can be subdivided into 3 zones,which consist of a melted region at the surface,a zone with solid state transformation and the area adjacent to the unaffected substrate where cementite is slightly dissolved.The melted zone possessed a cellular growth morphology consisting of austenite and martensite.The carbon content of the austenite was measured to be over 1 wt-%.A great deal of retained austenite and twinned martensite were found in the first two zones(the melted and solid transformed).
关键词:
laser process
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