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
点击：2967次 下载：0次
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.