【作者】 王龙妹； 陈雷； 刘晓； 干勇； 仇圣桃； 叶晓宁；

【Author】 Wang Longmei~1,Chen Lei~2,Liu Xiao~3,Gan Yong~1,Qiu Shengtao~1,Ye Xiaoning~4(1.Central Iron and Steel Research Institute,Beijing 100081,China;2.Yanshan University,Qinhuangdao 066004,China;3.Heibei United University, Tangshan 063009,China;4.Stainless Steel Branch,Baoshan Iron & Steel Co.,Ltd.,Shanghai 200031,China)

【机构】 钢铁研究总院； 燕山大学； 河北联合大学； 宝钢不锈钢技术中心；

【摘要】 研究了微量稀土对节镍型奥氏体耐热不锈钢高温持久性能的影响。研究结果表明:稀土显著延长了耐热钢的高温持久寿命约3～6倍,使得耐热钢的蠕变断裂方式由楔形裂纹逐渐过渡到蠕变空洞,稀土使得晶界碳化物呈球状断续分布,抑制杂质元素在晶界的偏聚,降低了蠕变断裂的沿晶趋势,改善高温持久强度。更多还原

【Abstract】 Effect of RE on creep-rupture properties of saving Ni austenitic heat-resistant steel was investigated.The results showed that the creep fracture mode changed gradually from "wedge crack" to "void",carbides modified into discontinuous distribution,the segregation of S in GB restrained by RE,resulted in the creep rupture life prolonged by 3～6 times.更多还原