材料期刊网

Microstructure of Laser Processed T10 Carbon Tool Steel

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 , null , null

Laser/Electron Beam Processing of As-cast Nd_2Fe_(14)B Alloy

HU Jiandong , ZHANG Xujun , SHI Zhusheng Microanalysis Center , Jilin University of Technology , Changchun , 130025 , China.Department of Metallurgy and Materials , University of Birmingham U.K.

材料科学技术（英）

It was found that the free Fe in the melted zone of the as—cast Nd_2Fe_(14)B alloy could be dissolved by Iaser/electron beam.The growth direction of Nd_2Fe_(14)B grains is nearly perpendicular to the sur- face of the samples.EDX examination showed that Fe element was homogeneously distributed in the melted zone.Results presented in this paper have giv- en hint to remove free Fe in as—cast Nd_2Fe_(14)B alloy.

关键词: Nd-Fe-B alloy , null

As-cast Medium Mn Steel with Nodular Carbide Modified by Y-base Heavy RE Compound

JIANG Qichuan HE Zhenming WANG Shoushi CUI Donghuan YAN Jiulin Metallic Materials Engineering Department , Jilin University of Technology , Changchun , 130025 , China.

材料科学技术（英）

关键词: Y-base heavy RE compound , null , null , null