Tempering Behavior of M50 Steel with Different Austenite Proportion Induced by High Current Pulsed E

• 作 者: G.E.Ozure
• 机 构: Institute of High Current Electronics,4,Academichesky Av.,Tomsk 634055,Russia,
• 出 处: 稀有金属材料与工程
• 发表日期: 2012年S1期
• 关键词: martensite austenite Electron tempered saturated subsequent metallic retained de

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.

M50 steel was irradiated by high current pulsed electron beam (HCPEB) with different pulses. The subsequent tempering was carried out between 500 and 625 ° C. Microstructure evolution was analyzed by scanning electron microscopy and X-ray diffraction. It was 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 more carbon and metallic elements depict higher tempering stability. During temperature curing, carbides precipitates among the grain and phase boundaries.The decreased solution of the elements promotes the retained austenite into martensite.