硼对60mm厚Q690D钢淬透性和力学性能的影响  

Effects of boron on hardenability and mechanical properties of 60mm Q690D steel

作　　者：杨维宇[1] 董瑞峰[2] 高峰[1] 李智丽[1] 

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010 [2]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

出　　处：《钢铁》2015年第2期76-80,共5页Iron and Steel

摘　　要：通过端淬试验、Z向硬度测试、显微组织和力学性能分析,研究了硼对60 mm厚Q690D钢淬透性和力学性能的影响。试验结果表明:微量固溶硼可显著提高60 mm厚Q690D钢的淬透性;和无硼的试验钢相比,含硼试验钢板厚1/4处的淬火组织由马/贝复相变成板条马氏体,淬火、回火态横截面上Z向最大硬度差分别由9、5HRC降低到4、3HRC,提高了Z向硬度的均匀性,同时含硼试验钢淬火、回火态的强度和韧性得到提高。By jominy test, Z direction hardness test,microstructure and mechanical properties analysis,the effects of boron on hardenability and mechanical properties of 60 mm Q690 D steel were studied. The results show that the trace solution boron can significantly improve the hardenability of 60 mm Q690 D steel; compared with the experimental steel without boron addition,quenching microstructure of experimental steel with boron addition was transformed from martensite/bainite complex phases to lath martensite at thickness of 1/4,the maximum hardness difference of Z direction at transverse section for quenching was reduced from 9HRC to 4HRC and that for tempering was reduced from 5HRC to3 HRC,which made the homogeneity of hardness at Z direction improved,as well as the strength and toughness for quenching and tempering of experimental steel with boron.

关 键 词：硼 Q690D 淬透性 Z向硬度 显微组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]