摘要
通过高温拉伸和高温压缩试验研究了两种Cr21节约型双相不锈钢在950～1150℃温度范围内的高温塑性,结果表明两种材料的高温塑性差异很大.通过温度、应变速率、相比例和显微组织4个方面的分析发现,适当增加稳定铁素体相元素和升高变形温度有利于提高Cr21节约型双相不锈钢的高温塑性.在较低温度较高应变速率热变形时,裂纹容易在被拉长的奥氏体和铁素体相界处形核并沿着相界在铁素体内进行扩展.
Hot ductility of two kinds of Cr21 lean duplex stainless steels was investigated by high- temperature compression/tension tests in the range from 950 to 1150 ℃, and the results showed the obvious difference between them in hot ductility. The effects of temperature, strain rate, ratio of phases and microstructure on the hot ductility of the two kinds of stainless steels were discussed, and it was found that increasing of stabilized ferritic elements and deformation temperature are beneficial to the improvement of hot ductility. While deformation at comparatively low temperature and high strain rate, cracks tend to nucleate at the interface of elongated austenite and ferrite and propagate in ferrite along the interface.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第10期1429-1432,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50734002)
