Effect of Heat Treatment on Prior Grain Size and Mechanical Property of a Maraging Stainless Steel |
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Authors: | Kai LIU Yiyin SHAN Zhiyong YANG Jianxiong LIANG Lun LU Ke YANG |
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Affiliation: | Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China... |
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Abstract: | Effect of the heat treatment, including solution treatment (ST) and aging treatment (AT), on the prior austenite grain (PAG) size, microstructure and mechanical properties of a precipitation hardening maraging stainless steel was investigated. The results indicate that the relations between PAG size and yield strength (σy) under both ST and AT conditions obey the Hall-Petch relationship. Furthermore, after ST at 1050℃ for 1 h+cryogenic treated (CT) at -70℃ for 8 h+AT at 535℃ for 4 h, the tested steel showed its ultimate tensile strength (σb) and σy over 1900 MPa and 1750 MPa, respectively. |
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Keywords: | Martensite Microstructure Precipitation hardening Heat treatment |
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