Effect of Aging on Hardening Behavior of 15-5 PH Stainless Steel

PENG Xin-yuan

PDF(6724 KB)

钢铁研究学报（英文版） ›› 2015, Vol. 22 ›› Issue (7) : 607-614.

Metallurgy and Metal Working

Effect of Aging on Hardening Behavior of 15-5 PH Stainless Steel

Xin-yuan PENG^1,2,3,Xian-liang ZHOU^1,2,3,Xiao-zhen HUA²,³,Zhen-wei WEI²,Hua-ying LIU²

作者信息 +

Effect of Aging on Hardening Behavior of 15-5 PH Stainless Steel

Xin-yuan PENG^1,2,3,Xian-liang ZHOU^1,2,3,Xiao-zhen HUA²,³,Zhen-wei WEI²,Hua-ying LIU²

Author information +

文章历史 +

摘要

Microstructure transformation and aging hardening behavior of 15-5 PH stainless steel were studied by optical microscopy (OM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results showed that the 15-5 PH stainless steel consists of NbC precipitates and lath matensite with a high dislocation density after solution treatment. With increasing aging temperature and aging time, the martensitic laths were resolved gradually. Meanwhile, the nanometric-sized Cu precipitates gradually coarsened and lost their coherency with the martensite matrix, which exhibited an elliptical shape finally. Fine Cu precipitates can lead to significant dispersion hardening effect, while the coarsened Cu precipitates have no contribution to strengthening. The reversed austenite was observed in the specimens aged at 550 ℃ and above; moreover, the amount of reversed austenite increased as aging temperature increased. The precipitation hardening behavior of 15-5 PH stainless steel may depend on the balance between the softening caused by the formation of reversed austenite and the hardening caused by the precipitation of copper.

Abstract

关键词

15-5 PH stainless steel / Cu precipitates / reversed austenite / aging / hardening behavior

Key words

15-5 PH stainless steel / Cu precipitates / reversed austenite / aging / hardening behavior

图表

引用本文

EndNote

Ris (Procite)

Bibtex

导出引用

PENG Xin-yuan. Effect of Aging on Hardening Behavior of 15-5 PH Stainless Steel[J]. 钢铁研究学报（英文版）, 2015, 22(7): 607-614

XIN-YUAN -PENG. Effect of Aging on Hardening Behavior of 15-5 PH Stainless Steel[J]. Journal of Iron and Steel Research International, 2015, 22(7): 607-614

参考文献

[1] Aghaie-Khafri M，Adhami F. Hot deformation of 15-5PH stainless steel [J]. Materials Science and Engineering A，2010，527，1052-1057.
[2] Herny E. Mechanical characterisation and investigation of thermal and thermomechanical aging mechanisms of martensitic stainless steel 15-5PH [J]. International Heat Treatment and Surface Engineering，2009，3，65-69.
[3] Herny E，Lours P，Andrieu E，et al. Evolution of microstructure and impact-strength energy in thermally and thermomechanically aged 15-5PH [J]. Journal of Materials: Design and Applications，2008，222，299-304.
[4] Hu N H，Gao J B，Song X P. Improvement of Heat Treating for 15-5PH Stainless Steel Cylinders [J]. Heat Treatment of Metals，2007，32，76-77.
[5] Habibi Bajguirani H R. The effect of aging upon the microstructure and mechanical properties of type 15-5 PH stainless steel [J]. Materials Science and Engineering A，2002，338，142-159.
[6] Hsiao C N，Chiou C S，Yang J R. Aging reactions in a 17-4 PH stainless steel [J]. Materials Chemistry and Physics，2002，74，134-142.
[7] Viswanathan U K. Effects of Aging on the Microstructure of 17-4 PH Stainless Steel [J]. Materials Science and Engineering A，1988，104，181-189.
[8] Liu Z B，Liang J X，Yang Z Y，et al. Effect of carbon content on microstructure and mechanical properties of type 15-5PH precipitation hardened stainless steel [J]. Journal of Aeronautical Materials，2011，31，7-12.
[9] Liu Z B，Yang Z Y，J. X. Liang，et al. Precipitation behavior and transformation kinetics of reverted austenite in ultra-high strength stainless steel [J]. Transactions of Materials and Heat Treatment，2010，31，39-44.
[10] Wang J，Zou H，Li C，et al. Relationship of microstructure transformation and hardening behavior of type 17-4PH stainless steel [J]. Journal of University of Science and Technology Beijing，2006，3，235-239.
[11] Mirzadeh H，Najafizadeh A. Aging kinetics of 17-4 PH stainless steel [J]. Materials Chemistry and Physics，2009，116，119-124.
[12] Othen P J，Jenkins M C，Smith G D W，et al. High resolution electron microscopy studies of the structure of Cu precipitates in α-Fe [J]. Philosophical Magazine A，1994，70，1-24.

基金

National High Technology Research and Development Program of China;National Science and Technology Project of China;Key Laboratory Foundation of Metal Material Microstructure Control of JiangXi Province