时效对2205双相不锈钢σ析出相的影响
Effects of Aging on σ-phase Precipitation of 2205 Duplex Stainless Steel
王院生, 李海丰, 王 均, 熊 计
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作者单位:(四川大学 制造科学与工程学院, 四川 成都 610065)
中文关键字:2205双相不锈钢; σ析出相; 时效; 硬度; 矫顽磁力
英文关键字:2205 duplex stainless steel; σ phase precipitation; aging treatment; hardness; coercive force
中文摘要:通过SEM和EDS对2205双相不锈钢的维氏硬度及矫顽磁力的测量,研究了2205双相不锈钢在时效条件下σ相的析出规律,分析了σ析出相对2205双相不锈钢的维氏硬度及其矫顽磁力的影响。结果表明:σ析出相的多少与时效时间成正比,与时效温度成反比。σ析出相越多,其硬度越高,2205不锈钢经800 ℃时效8 h后,基体铁素体发生分解,其矫顽磁力为零。
英文摘要:The precipitation rule of σ-phase in 2205 duplex stainless steel was studied by SEM, EDS and vickers hardness, and the coercive force under different aging condition was also analyzed. The relation between σ precipitation and vickers hardness of 2205 duplex stainless steel and the coercive force change was analyzed. The results show that the quantity of σ precipitation is proportional with the aging time, and in reverse proportion with the aging temperature. The more the σ precipitation, the higher the hardness, the ferrite is decomposition in 2205 duplex stainless steel after aging at 800 ℃ for 8 h, which make its coercive force change into zero.