TRANSFORMATION INDUCED SUPERPLASTICITY IN 18Ni MARAGING STEEL

Acta Metallurgica Sinica (English Letters) ›› 1992, Vol. 5 ›› Issue (4): 278-281.

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TRANSFORMATION INDUCED SUPERPLASTICITY IN 18Ni MARAGING STEEL

YIN Zhongda Harbin Institute of Technology,Harbin,ChinaZHOU Yongkang Shanghai Centrifugal Machinery Research Institute,Shanghai,China

Received:1992-08-25 Revised:1992-08-25 Online:1992-08-25 Published:2009-10-10

Abstract

Abstract: 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.

Key words: maraging steel, transformation induced superplasticity, cold-rolling

YIN Zhongda Harbin Institute of Technology,Harbin,ChinaZHOU Yongkang Shanghai Centrifugal Machinery Research Institute,Shanghai,China. TRANSFORMATION INDUCED SUPERPLASTICITY IN 18Ni MARAGING STEEL[J]. Acta Metallurgica Sinica (English Letters), 1992, 5(4): 278-281.

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TRANSFORMATION INDUCED SUPERPLASTICITY IN 18Ni MARAGING STEEL

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