Effect of aging treatment on mechanical properties at room temperature and  low temperature of 15-5PH stainless steel

doi:10.13251/j.issn.0254-6051.2024.09.030

Abstract

Abstract: 15-5PH precipitation-hardened stainless steel was solution treated at 1040 ℃ for 1 h, and then aged at 480 ℃ for different time (1, 2, 4 h). The microstructure, fracture morphology and properties were observed and tested to study the effect of aging time on its mechanical properties at room temperature and -50 ℃. The results show that the tensile and impact properties of the 15-5PH steel at room temperature don't change significantly with the aging time increasing. The tensile properties at -50 ℃ have no obvious change, but the impact absorbed energy is significantly improved, the impact absorbed energy is increased from 31.5 J to 77.5 J, due to the longer the aging holding time, the higher the reversed austenite content in the steel, resulting in better low-temperature impact property.

Key words: 15-5PH precipitation-hardened stainless steel, aging treatment, microstructure, mechanical properties

CLC Number:

TG156

Xu Feng, Sun Qiang, Jia Yunhao. Effect of aging treatment on mechanical properties at room temperature and low temperature of 15-5PH stainless steel[J]. Heat Treatment of Metals, 2024, 49(9): 191-197.

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Effect of aging treatment on mechanical properties at room temperature and low temperature of 15-5PH stainless steel

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