厚规格高强度钢Q690D的淬透性研究  

Research on Hardenability of Thick High-strength Q690D Steels

作　　者：康利明[1] 李德刚[2] 杨维宇[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]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《包钢科技》2013年第4期31-33,72,共4页Science & Technology of Baotou Steel

摘　　要：通过端淬试验、硬度测试和显微组织分析，研究了2种成分不同厚度Q690D的淬透性。结果表明：1#50mm厚Q690D淬火态边部和厚度1／2处硬度HRC差值为12，淬透性较差；通过调整成分和热处理工艺极大地改善了厚规格Q690D的淬透性，2#50～70mm厚Q690D淬火、回火态边部和厚度1／2处硬度差值较小，50mm厚两者硬度HRC差值最大也只有为5。The hardenabilities of two Q690D steel plates with different compositions and thicknesses are studied by end quenching test, hardness test and microstructure analysis. The results show that for 1 # steel plate with the thickness of 50 mm,the difference for hardness at quenched edge and thickness of 1/2 is 12, so the hardenability is poor. Thus, it is greatly improved by adjusting the compositions and heat treatment process. While for 2# steel plate with the thickness of 50 -70 mm,the difference for hardness at quenched and tempered edge and thickness of 1/2 is smaller as well as the maxi- mum hardness difference is just 5 for the steel plate with the thickness of 50 mm.

关 键 词：Q690D 淬透性 硬度 显微组织 

分 类 号：TG115.6[金属学及工艺—物理冶金]