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| Study of Grain Refining Process and Mechanical Properties of a High Strength Maraging Stainless Steel |
| LIU Zhenbao1,YONG Qilong1,YANG Zhiyong1,LIANG Jianxiong1,YU Shuying2 |
| 1. Central Iron and Steel Research Institute, Beijing 100081, China; 2. Fushun Special Steel Group,Fushun 113001, Liaoning, China |
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Abstract Reverse austenization,grain refining and effect of grain refined structure on mechanical properties of a high strength maraging stainless steel were studied. The results show that the steel with 7 μm grains was acquired by thermocycle refining treatment, many martensite lath blocks were partitioned into some subgrains, and a few single lathes were partitioned by some martensite lath packets in new refined grains; compared with the steel treated by 1050 ℃×1 h,the yield strength of thermocycle refined steel was increased by 130 MPa,A and Z were increased by 7.5% and 11%,so that thermocycle refining treatment is a new efficient method to improve both strength and toughness of maraging stainless steel.
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Received: 01 January 1900
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2008, Vol. 43 
