Effect of cooling condition on the intergranular corrosion resistance of UNS S32506 duplex stainless steel

被引：18
|
作者：
Takei, Takayuki [1 ]
Yabe, Murotsune [1 ]
Wei, Fu-Gao [1 ]
机构：
[1] Nippon Yakin Kogyo Co Ltd, Tech Res Ctr, Kawasaki Ku, 4-2 Kojima Cho, Kawasaki, Kanagawa 2108558, Japan
来源：
CORROSION SCIENCE | 2017年 / 122卷
关键词：
Duplex stainless steel; Intergranular corrosion; Cooling condition; Cr depletion; alpha/gamma Interface; SECONDARY AUSTENITE; PITTING CORROSION; HEAT-TREATMENT; NITRIC-ACID; SIGMA-PHASE; MICROSTRUCTURE; PRECIPITATION; BEHAVIOR; SUSCEPTIBILITY; PHOSPHORUS;
D O I：
10.1016/j.corsci.2017.03.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of cooling condition on the intergranular corrosion resistance of UNS S32506 duplex stainless steel was investigated by means of Huey test and microstructural observation. It was found that quenching at a temperature below 800 degrees C after air cooling at a fixed rate from solutionization temperature enhances the intergranular corrosion rate. No precipitation has been found at all cooling conditions. Formation of Cr-depletion zone on the gamma phase side of the alpha/gamma interface due to local chemical change accompanying alpha-gamma phase transformation during air cooling is responsible for the intergranular corrosion degradation of the UNS S32506 duplex stainless steel.
引用
收藏
页码：80 / 89
页数：10
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