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| Influence of Solution Temperature on Microstructure and Mechanical Properties of 00Cr27Ni7Mo5N |
| HUANG Sheng1,2,SONG Zhi-gang2,ZHENG Wen-jie2，YIN Jian-cheng1 |
（1． Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan,China
2. Institute of structural Material, Central Iron and Steel Research Institute, Beijing 100081, China） |
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Abstract The effect of solution temperature on the microstructure and properties of hyper duplex stainless steel 00Cr27Ni7Mo5N was investigated. σ phase precipitation and its effect on microstructure and mechanical properties were analyzed by OM, SEM, EDS, microhardness measurements, impact and tensile tests. The phase diagram was calculated with the Thermo-Calc thermodynamic software and compared with the experiment results. It can be conclude, the intermetallic compound σ phase precipitatesed in the range of 800-1050℃, leads to an obvious increase in the hardness and strength, a sharp decrease in the ductility and toughness；contrary results are obtained with increasing the solution temperature from 1070 to 1200℃, the optimum solution temperature of the steel is about 1100℃.
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Received: 01 October 2010
Published: 15 December 2011
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2011, Vol. 46 
