作者：褚峰, 李小宝, 张珂, 岑风
作者单位：江苏省(沙钢)钢铁研究院, 江苏 张家港 215625
关键词：焊接接头;矩阵法;维氏硬度;标线法
摘要：
为解决标线法对50 mm厚EQ47调质态钢板多层多道焊接接头维氏硬度测试的局限性,采用一种矩阵测试方法,通过对焊接接头进行详细的微区硬度测试,并根据硬度值绘制硬度等值线图,结果显示该方法可以直观显示焊接接头的硬度值分布以及各硬度值区域所占比例;同时对硬度等值线图上不同硬度值区域的显微组织和微区成分进行较深入的分析和研究。结果表明:不同位置硬度值的差别与显微组织有关,与元素的分布基本无关,该方法既能定性又能定量进行硬度值分布表征,更加有利于对焊接接头的组织及力学性能进行分析。
Analysis study of hardness value distribution in welded joints by matrix method
CHU Feng, LI Xiaobao, ZHANG Ke, CEN Feng
Institute of Research of Iron and Steel, Shasteel, Zhangjiagang 215625, China
Abstract: To avoid the limitation of Vickers hardness test on the multi-layer multi-pass welded joints of 50mm thick EQ47 QT steel plates by marking method, this study adopts the matrix method to test the micro area hardness of welded joints in detail and draw the hardness value isogram. The results show that this method can directly show the hardness value distribution of welded joints and the proportion of each hardness value range by means of the hardness value isogram; besides, a deep analysis has been carried out on the microstructure and micro area compositions in different hardness value areas on the hardness value isogram, and the research results show that the hardness value in different locations are relevant to the microstructure, irrelevant to the element distribution. Matrix method is a comprehensive hardness testing method, which can not only characterize hardness distribution quantitatively and qualitatively, but also benefit the structure and mechanical property analysis of welded joints.
Keywords: welded joints;matrix method;vickers hardness;marking method
2015, 41(7): 28-32 收稿日期: 2014-9-10;收到修改稿日期: 2014-11-18
基金项目:
作者简介: 褚峰(1991-),男,江苏张家港市人,助理工程师,主要从事钢铁检测工作。
参考文献
[1] 李铁龙,杨新岐,王振山. AZ80镁合金搅拌摩擦焊缝硬度性能分析[J]. 热加工工艺,2013,42(9):201-204.
[2] 谭兵,张海玲,陈东高,等. 30CrNi3MoV钢单/双丝焊缝组织与性能研究[J]. 兵器材料科学与工程,2009,32(3):65-68.
[3] GB/T 2654—2008焊接接头硬度试验方法[S]. 北京:中国标准出版社,2008.
[4] 李国成,王为良. 固溶处理对S31803双相钢板焊接接头力学性能的影响[J]. 热加工工艺,2010,39(14):179-180.
[5] 农琪,谢业东. Al-Mg-Si铝合金6061焊接接头组织软化与强化机理[J]. 金属铸锻焊技术,2012,41(9):148-150.
[6] 杨东杰,胡连海,黄坚,等. 船用E级钢厚板CO2激光多层焊接工艺与组织[J]. 热加工工艺,2010,39(19):152-155.
[7] 陆雪冬,岑越,王欢,等. 多层多道焊接DH40船用钢接头组织及力学性能[J]. 焊接学报,2013,34(2):79-83.
[8] 李轶非,王梁,吴健栋,等. NiCrMoV耐热钢贝氏体焊缝韧性薄弱区的确定[J]. 机械工程学报,2013,49(4):83-88.
[9] Munro C. Analysis of laser-metal active gas hybrid weldments of HSLA-65 steel-macroscopic, microstructural and hardness evaluations[M]. Canada: Technical Memorandum DRDC Altantic TM,2009:11-15.
[10] Song K K, Pauly S, Zhang Y, et al. Significant tensile ductility induced by cold rolling in Cu47.5Zr47.5Al5 bulk metallic glass[J]. Intermetallics,2011(19):1394-1398.
[11] Edwards P D, Ramulu M. Investigation of microstructure, surface and subsurface characterizstics in titanium alloy friction stir welds of varied thicknesses[J]. Science and Technology of Welding and Joining,2009,14(5):476-483.
