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尹钟大 , 周永康
金属学报
本文研究了18Ni(2450MPa级)马氏体时效钢的相变超塑性。通过冷变形量、应力以及冷却速度对相变应变影响规律的研究,开发了该合金的相变超塑性成形工艺。当冷变形量为60％时,在最佳工艺条件下,经14cyc γ?α’循环相变,可获得320％的极限延伸率。经TEM观察发现,该合金应力诱发马氏体形态为块状马氏体。
关键词: 马氏体时效钢 , transformation induced superplasticity , cold-rolling
YIN Zhongda Harbin Institute of Technology , Harbin , ChinaZHOU Yongkang Shanghai Centrifugal Machinery Research Institute , Shanghai , China
金属学报(英文版)
After exploring the influence of stress,cold-rolling reduction and cooling rate on transforma- tion induced strain,the transformation induced superplasticity forming technique of the 18Ni maraging steel(2450 MPa)was developed.Through 14 times γα′ cyclic transformation,the limited elongation of 320% can be obtained in 60% cold-rolled specimen.TEM observation revealed that the morphology of stress induced martensite is massive.
关键词: maraging steel , null , null
