采用小角Ｘ射线散射、Ｍｏｓｓｂａｕｅｒ谱、透射电镜方法研究了１８Ｎｉ马氏体时效钢的时效过程．结果表明，１８Ｎｉ合金在固溶处理５００℃等温时效过程中，首先发生调幅分解．然后在调幅组织的Ｎｉ－Ｍｏ－Ｔｉ富集区以原位形核方法式析出含Ｆｅ的Ｎｉ３（Ｍｏ，Ｔｉ）型金属间化合物．随时效时间延长，Ｎｉ３Ｍｏ和Ｎｉ３Ｔｉ粒子聚集长大并部分溶解，同时析出球形Ｆｅ２Ｍｏ金属间化合物．并形成逆转变奥氏体．
The aging process of 18Ni maraging steel have been studied by means of small angle X-ray scattering,Mossbauer spectroscopy and TEM.The spinodal decomposition firstly appears at the early stages of 500℃ aging in 18Ni maraging steel after solution treatment,and then the Ni3(Mo.Ti)intermetallic particles containing Fe precipitate in Ni-Mo-Ti rich regions of the modulated structure by in situ nucleation. With increasing aging time,Ni3Mo and Ni3Ti particles coalesce significantly and may be partly resolved into the matrix, and simultaneously the Fe2Mo particles precipitate and the reversed austenite can be found.Correspondent:YIN Zhongda,pro fessor,Campus Post Box 433,Harbin institute of Technology, Harbin 150001
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| [9] | 铃木朝夫．铁钢,1973 |
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