孙莹,于庆波

• 1:徐州工程学院机电工程学院

摘要(Abstract)：

以X60和X70管线钢为研究对象,研究了管线钢中显微组织与断裂韧性之间的关系。结果表明,多边形铁素体对管线钢既有增韧性又有减韧性作用:当钢中分布细小的多边形铁素体晶粒时,多边形铁素体迫使裂纹分叉、弯曲和转向,导致裂纹的扩展功提高,增加了管线钢的韧性,而且随多边形铁素体含量增多,落锤撕裂试验断口纤维率也随之提高。然而,当多边形铁素体晶粒粗大且以绝对多的数量分布在基体中时,其增韧性作用消失。

关键词(KeyWords)： 多边形铁素体;脆性断裂;断口纤维率;落锤撕裂实验

Abstract:

Keywords:

基金项目(Foundation): 江苏省自然科学基金项目(BK20131123);; 江苏省第四期“333工程”培养资金资助项目(BRA2011037);; 江苏省“六大人才高峰”资助项目(2012-ZBZZ-007);; 住房与城乡建设部研究开发项目(2013-K4-28);; 徐州工程学院校级科研项目(XKY2012101,XKY2012211);; 江苏省前瞻性产学研联合创新基金项目(BY2013022)

作者(Author): 孙莹,于庆波

DOI: 10.13289/j.issn.1009-6264.2014.03.019

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