M50 steel was irradiated by high current pulsed electron beam(HCPEB)with different pulses.The subsequent tempering was carried out between 500 and 625℃.Microstructure evolution was analyzed by scanning electron micro...M50 steel was irradiated by high current pulsed electron beam(HCPEB)with different pulses.The subsequent tempering was carried out between 500 and 625℃.Microstructure evolution was analyzed by scanning electron microscopy and X-ray diffraction.It is found that the HCPEB treatment could constrain martainsite transformation in the surface layer of the samples.Tempered behavior of HCPEB remelted layer strongly depends on the proportion of retained austenite.Austenite saturated more carbon and metallic elements depict higher tempering stability.During tempered process,carbides precipitates among the grain and phase boundaries.The decreased solution of the elements promotes the retained austenite into martensite.展开更多
基金National Basic Research Program of China(2007CB607602)NSFC(50875058)+1 种基金Heilongjiang excellent young scientists found(JC200901)the Program of Excellent Teams of Harbin Institute of Technology
文摘M50 steel was irradiated by high current pulsed electron beam(HCPEB)with different pulses.The subsequent tempering was carried out between 500 and 625℃.Microstructure evolution was analyzed by scanning electron microscopy and X-ray diffraction.It is found that the HCPEB treatment could constrain martainsite transformation in the surface layer of the samples.Tempered behavior of HCPEB remelted layer strongly depends on the proportion of retained austenite.Austenite saturated more carbon and metallic elements depict higher tempering stability.During tempered process,carbides precipitates among the grain and phase boundaries.The decreased solution of the elements promotes the retained austenite into martensite.
