陈路飞,熊毅,李会鹏,路妍,任凤章

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心

摘要(Abstract)：

利用电子万能试验机对316LN不锈钢在-40~300℃范围内进行单轴拉伸实验。借助扫描电镜(SEM)和透射电镜(TEM)对不锈钢拉伸变形后的组织及断口形貌进行系统分析,研究了温度和拉伸速度对316LN不锈钢组织与性能的影响规律。结果表明:在-40~300℃进行拉伸实验,强度指标随着温度的升高而降低,在25~300℃范围内,随着温度升高,伸长率降低,断口韧性断裂特征逐渐减弱,在-40~-20℃范围内,伸长率随着温度升高而增大,断口呈现韧性断裂特征;同一实验温度下(-20℃、300℃),随着拉伸速度的提高,强度指标增大,伸长率降低;在-40~300℃范围内,随着实验温度的降低,变形组织形态由位错缠结为主向形变孪晶为主发生转变。

关键词(KeyWords)： 316LN奥氏体不锈钢;温度;拉伸速度;组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50801021,51201061);; 河南省科技攻关计划项目(152102210077);; 河南省高校科技创新人才支持计划项目(17HASTIT026);; 河南省科技创新杰出人才支持计划项目(144200510009);; 河南省教育厅科技计划项目(16A430005);; 河南科技大学科技创新团队资助项目(2015XTD006)

作者(Author): 陈路飞,熊毅,李会鹏,路妍,任凤章

DOI: 10.13289/j.issn.1009-6264.2016.10.024

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