肖蔚荣,任学冲,陈刚,赵海,崔银会

• 1:北京科技大学国家材料服役安全科学中心
• 2:马鞍山钢铁股份有限公司

摘要(Abstract)：

对碳的质量分数为0.54%高速车轮钢轮辋进行了不同奥氏体化温度和冷却速率热处理,得到具有不同晶粒尺寸和珠光体片间距的显微组织,在20~-120℃下对具有不同显微组织的紧凑拉伸(CT)试样进行断裂韧性测试。结果表明:在实验温度范围内,不同显微组织车轮钢断裂韧性均随温度的降低而降低,温度对不同显微组织车轮钢材料断裂韧性的影响主要是由于温度对材料流变应力的改变以及CT试样断裂模式的变化。温度较高时,解理断裂的模式为扩展控制,晶粒尺寸和珠光体片间距越小断裂韧性越高;温度较低时,解理断裂的模式为形核控制,显微组织对断裂韧性的影响不明显。

关键词(KeyWords)： 车轮钢;显微组织;温度;断裂韧性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51171020;U1234207);; 高等学校学科创新引智计划(B12012);; 国家重点基础研究发展计划(2015CB654801)

作者(Author): 肖蔚荣,任学冲,陈刚,赵海,崔银会

DOI: 10.13289/j.issn.1009-6264.2016.04.025

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