徐海健,胡万卿,康超,沙孝春

• 1:海洋装备用金属材料及其应用国家重点实验室
• 2:鞍钢股份有限公司
• 3:辽宁科技大学材料与冶金学院

摘要(Abstract)：

对节约型2101双相不锈钢连铸坯试样在1180、1200、1220和1240℃进行高温热处理,通过光学显微镜、扫描电镜、透射电镜和显微硬度计等分析了2101双相不锈钢的显微组织、奥氏体含量及其硬度随加热温度和保温时间的变化规律。结果表明:在相同保温时间下,随着温度升高,2101双相不锈钢中奥氏体含量逐渐降低,晶粒逐渐粗化,奥氏体与铁素体的两相硬度差逐渐减小;在1240℃时,铁素体相的晶界及晶界内有大量的脆性相析出;TEM分析表明,这些析出相为六方结构的Cr_2N相;在相同的加热温度下,随着保温时间的延长,奥氏体的含量逐渐增加,奥氏体与铁素体的两相硬度差逐渐增加。

关键词(KeyWords)： 双相不锈钢;连铸坯;Cr_2N析出相;显微组织

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2018YFC0705502);; 中国博士后科学基金(2018M641699)

作者(Author): 徐海健,胡万卿,康超,沙孝春

DOI: 10.13289/j.issn.1009-6264.2020-0321

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