谢保盛,蔡庆伍,曹嘉明,宁榛,程磊

• 1:北京科技大学钢铁共性技术协同创新中心
• 2:北京科技大学高效轧制国家工程研究中心

摘要(Abstract)：

设计了一种低碳贝氏体型高强度工程机械用钢,并采用快速冷却工艺进行厚度12 mm的Q800D钢的轧制试验,研究了冷却速率对钢板组织、强度和韧性的影响。结果表明,随着钢板冷却速率的增加,小角度晶界和大角度晶界密度均有较大提高,钢板强度和韧性有明显改善。当钢板冷却速度为80℃/s时,钢板综合性能达到国标Q800D级别的要求。另外,在考虑到晶界和M/A组元对韧性影响的基础上计算了不同冷却速度钢板的韧性参数,韧性参数随冷速的变化趋势与-20℃冲击功随冷速的变化趋势一致,两者有良好的相关性。

关键词(KeyWords)： Q800D;冷却速率;取向差角;有效晶粒尺寸;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51274036)

作者(Author): 谢保盛,蔡庆伍,曹嘉明,宁榛,程磊

DOI: 10.13289/j.issn.1009-6264.2015.10.018

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