HAO Shengzhi1 LI Mincai1 ZHANG Xiangdong1, 2 GROSDIDIER Thierry2 DONG Chuang1 1. Surface modification of mold steel SKD11 by high current pulsed electron beam[J]. Nuclear techniques, 2009, 32(3): 214-216.
HAO Shengzhi1 LI Mincai1 ZHANG Xiangdong1, 2 GROSDIDIER Thierry2 DONG Chuang1 1. Surface modification of mold steel SKD11 by high current pulsed electron beam[J]. Nuclear techniques, 2009, 32(3): 214-216.DOI:
Mechanism of surface modification technique by high current pulsed electron beam (HCPEB) was studied with SKD11 steel samples. It was found that crater-like defects would formed on the irradiated surface
the area density of craters and surface roughness decreased with the increasing number of HCPEB pulses. According to the XRD patterns
carbides in the modified surface layers dissolved after several HCPEB pulses and a high-percentage austenite microstructure is formed
but excessive energy deposition resulted in decomposition of the austenite. Treating the samples at 19.8 kV
the wear resistance of modified SKD11 steel improved and the greatest enhancement occurred at 8 pulses. Discussions were given on changes in contents of carbide and austenite in the surface layers.