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| Effect of solution treatment on microstructure and corrosion resistance of duplex
stainless steel fabricated by cold isostatic pressing |
| ZHANG Peng1，WANG Zhiyong2，SHANG Feng2，LI Huaqiang2，HE Yiqiang2 |
| 1Engineering Training Center，Jiangsu Ocean Ucean University，Lianyungang 222005，China；
2School of Mechanical Engineering，Jiangsu Ocean University，Lianyungang 222005，China |
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Abstract The 316L and 430 water atomized stainless steel powders were mixed according to the mass ratio of 65：
35，and the duplex stainless steel was prepared by the cold isostatic pressure-vacuum sintering process，the solution
treatment was carried out in 1 150-1 300 ℃，with a insulation for 1 h at a time. The evolution of microstructure
of duplex stainless steel with different solution treatment temperature was studied，and the effect of solution
treatment temperature on corrosion resistance of duplex stainless steel was studied by dynamic potential polarization
and electrochemical impedance. The results show that with the increase of solution treatment temperature，the
content of ferrite phase increases gradually，the content of austenite phase decrease gradually，the grain grows
gradually；and the two phase ratio of ferrite to austenitic is 39.1：60.9 at 1 300 ℃ ，and at this moment，duplex
stainless steel has good corrosion resistance.
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Received: 17 April 2019
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2021, Vol. 31 
