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| Microstructure evolution and performance improvement of powder metallurgy stainless steel with P addition |
| Qian Qin1, Dao-qing Zhang1, Fang Yang1,2, Cun-guang Chen1,2, Jun-jie Hao1, Zhi-meng Guo1,2 |
| 1 Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2 Shunde Innovation School, University of Science and Technology Beijing, Guangzhou 528399, Guangdong, China |
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Abstract P-containing 316L stainless steel was prepared by powder metallurgy technology using gas atomized alloy powder and phosphorus–iron alloy powder as raw materials. P addition was beneficial to sintering densification. With 0.6 wt.% P addition, the density increased from 7.60 to 7.82 g/cm3. In such case, the samples with 0.6 wt.% P addition should be sintered at a lower temperature of 1200 °C. Otherwise, there were coarse grain boundary precipitates, which would seriously deteriorate the performance of stainless steel. In the case of suppressing the formation of coarse precipitates, appropriate P content had a beneficial effect on apparent morphology, hardness and strength of stainless steel. When 316L- 0.6 wt.% P sample was sintered at 1200 °C, the hardness and tensile strength were increased to 86.3 HRB and 672.8 MPa, respectively, and the elongation still reached 38.1%. Besides, it also had good corrosion resistance.
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| Cite this article: |
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Qian Qin,Dao-qing Zhang,Fang Yang, et al. Microstructure evolution and performance improvement of powder metallurgy stainless steel with P addition[J]. Journal of Iron and Steel Research International, 2023, 30(10): 2055-2066.
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2023, Vol. 30 
