董小平,杨丽颖,庞艳荣,王青,温丽娟,任建立

• 1:河北大学质量技术监督学院
• 2:河北省科技工程学校

摘要(Abstract)：

为了研究不同传感器布置方式的声发射信号特性,以断铅实验模拟声发射源,采用光学显微镜(OM)、声发射检测仪测试了304不锈钢的显微组织与声信号特性参数。结果表明,不同截面的304不锈钢显微组织主要含有α'马氏体和奥氏体γ相,γ和α'晶粒平均尺寸大多低于20μm,所占比例超过75%,大于40μm的晶粒相对较少,纵截面显微组织相对致密;正方形布置传感器时,4个位置的声发射信号特性参数值波动较小,但等腰三角形、直线形布置传感器时,距模拟声发射源近的声活动相对较强;且随该距离增加,声信号特性参数减少幅度较大。

关键词(KeyWords)： 304不锈钢;显微组织;断铅;声发射信号特性

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金(E2014201120);; 河北省高等学校科学研究计划(Z2012168);; 2015年河北大学大学生创新项目(2015115);; 河北省大学生创新创业训练项目(201410075039,201410075084)

作者(Author): 董小平,杨丽颖,庞艳荣,王青,温丽娟,任建立

DOI: 10.13289/j.issn.1009-6264.2016.06.019

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