焊接材料及热输入对Q460钢厚板焊接接头拉伸性能的影响
Effect of Welding Material and Heat Input on Tensile Property of Welded Joint of Q460 Steel Thick Plate
摘 要
在不同热输入（12.6，16.4，19.5 kJ·cm-1）下分别对Q460低合金高强钢厚板进行实心焊丝和药芯焊丝CO2气体保护焊，研究了焊丝和热输入对接头显微组织及拉伸性能的影响。结果表明：随热输入增加，2种接头焊缝中柱状晶区的针状铁素体比例降低，大尺寸晶界铁素体增多；实心焊丝焊接接头焊缝区的硬度随热输入增加变化不大，药芯焊丝焊接接头的显著降低；实心焊丝焊接接头的屈服强度和抗拉强度与母材的相当，断后伸长率明显小于母材的，且断后伸长率随热输入的增加而降低；药芯焊丝焊接接头在低热输入下的强度与母材的相当，热输入的增加使抗拉强度损失显著，但对屈服强度和断后伸长率影响很小。
CO2气体保护焊
热输入
显微组织
拉伸性能
Q460 steel
CO2 gas shielded arc welding
heat input
microstructure
tensile property
Abstract
Low-alloy high-strength steel Q460 thick plates were welded by CO2 gas shielded arc welding with solid wire and flux-cored wire at different heat inputs (12.6, 16.4, 19.5 kJ·cm-1). The effects of welding wire and heat input on the microstructure and tensile properties of the joint were investigated. The results show that the proportion of acicular ferrite in columnar grain zone in weld zone of the two joints decreased and the grain boundary ferrite of large size increased with the increase of heat input. The hardness of weld zone of the joint welded with solid wire changed little with the increase of heat input,but that of the joint welded with flux-cored wire decreased significantly. The yield strength and ultimate tensile strength of the joint welded with solid wire were similar to those of base metal whereas the elongation was lower than that of base metal; the elongation decreased with the increase of heat input. The strenth of the joint welded with flux-cored wire was equivalent to that of the base metal at lower heat input. The increase of heat input obviously reduced the tensile strength, but affected the yield strength and elongation slightly.
中图分类号 TG457.11 TG111.91 DOI 10.11973/jxgccl201903001
所属栏目 试验研究
基金项目 国家自然科学基金资助项目（51571052，51371044）；辽宁省自然科学基金资助项目（2014020034）
收稿日期 2018/1/16
修改稿日期 2019/1/9
网络出版日期
作者单位点击查看
备注冯祥利(1972-),男,河北唐山人,博士研究生
引用该论文: FENG Xiangli,WANG Lei,LIU Yang. Effect of Welding Material and Heat Input on Tensile Property of Welded Joint of Q460 Steel Thick Plate[J]. Materials for mechancial engineering, 2019, 43(3): 1～6
冯祥利,王磊,刘杨. 焊接材料及热输入对Q460钢厚板焊接接头拉伸性能的影响[J]. 机械工程材料, 2019, 43(3): 1～6
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【2】WANG L, BASU P K, LEIVA J P. Automobile body reinforcement by finite element optimization[J]. Finite Elements in Analysis and Design, 2004, 40(8):879-893.
【3】KANG J, WANG C, WANG G D. Microstructural characteristics and impact fracture behavior of a high-strength low-alloy steel treated by intercritical heat treatment[J]. Materials Science and Engineering:A, 2012, 553:96-104.
【4】HAN G, XIE Z J, XIONG L, et al. Evolution of nano-size precipitation and mechanical properties in a high strength-ductility low alloy steel through intercritical treatment[J]. Materials Science and Engineering:A, 2017, 705:89-97.
【5】CAO X J, WANJARA P, BERNARD A, et al. Hybrid fiber laser-arc welding of high strength low alloy steel[J]. Materials Science Forum, 2014, 783:663-668.
【6】NATHAN S R, BALASUBRAMANIAN V, MALARVIZHI S, et al. Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints[J].Defence Technology,2015,11(3):308-317.
【7】涂英明, 景财年, 范吉超, 等.焊接速度对DP590双相钢板激光焊接接头组织和性能的影响[J]. 机械工程材料, 2016, 40(12):69-72.
【8】赵雷, 乔汉文, 梁军, 等. 焊接参数对T92/S30432异种钢焊接接头室温力学性能的影响[J]. 机械工程材料, 2015, 39(1):32-38.
【9】代雪佳, 吴松林, 成应晋, 等. 热输入对12MnNiCrMoV钢薄板焊接接头粗晶热影响区组织和性能的影响[J]. 机械工程材料, 2016, 40(11):63-66.
【10】MA T Y, HU Y F, LIU X, et al. Experimental investigation into high strength Q690 steel welded H-sections under combined compression and bending[J]. Journal of Constructional Steel Research, 2017, 138:449-462.
【11】江卓俊, 李敬勇, 齐彦昌, 等. 不同焊丝MAG焊接新型超高强度钢接头的显微组织及性能[J]. 机械工程材料, 2017, 41(4):33-38.
【12】李继红, 芦晓康, 任晓龙, 等. 焊接热输入对自保护药芯焊丝焊接X80管线钢接头组织和性能的影响[J]. 机械工程材料, 2016, 40(12):61-64.
【13】FANG C F, HE B, ZHAO Z C, et al. Comparative study on processing property between CWW CO2 gas shielded welding and SAW[J]. Journal of Iron and Steel Research, 2013, 20(4):81-86.
【14】杨景华, 周继烈, 叶尹,等. 焊接热输入对低合金高强钢焊接热影响区组织性能的影响[J]. 热加工工艺, 2011, 40(3):140-142.
【15】TSUYAMA T, NAKAI K, AKIYAMA M, et al. Effects of microstructure on mechanical property in weld metal formed with the hot-wire method applying ordinal CO2 gas shielded arc welding method[J]. Journal of the Iron & Steel Institute of Japan, 2013, 99(7):468-474.
【16】WAHBA M, MIZUTANI M, KATAYAMA S. Hybrid welding with fiber laser and CO2 gas shielded arc[J]. Journal of Materials Processing Technology, 2015, 221:146-153.
【17】方臣富, 陈志伟, 胥国祥, 等. 缆式焊丝CO2气体保护焊工艺研究[J]. 金属学报, 2012, 48(11):1299-1305.
【18】杜宝帅, 张忠文,李新梅,等.细晶Q420低合金高强钢焊接接头组织性能研究[J].热加工工艺,2011,40(13):115-117.
【19】MA T Y, HU Y F, LIU X, et al. Experimental investigation into high strength Q690 steel welded H-sections under combined compression and bending[J]. Journal of Constructional Steel Research, 2017, 138:449-462.
【20】CHEN Z, XIONG Y, QIU H, et al. Stress intensity factor-based prediction of solidification crack growth during welding of high strength steel[J]. Journal of Materials Processing Technology, 2018, 252:270-278.
【21】LI X, SHANG C, MA X. Elemental distribution in the martensite-austenite constituent in intercritically reheated coarse-grained heat-affected zone of a high-strength pipeline steel[J]. Scripta Materialia, 2017, 139:67-70.
【22】冯祥利, 王磊, 刘杨. Q460钢焊接接头组织及动态断裂行为研究[J]. 金属学报, 2016, 52(7):787-796.
【23】ZUHEIR B, MANSOOR K. Ultimate strength capacity of welded joints in high strength steels[J]. Procedia Structural Integrity, 2017, 5:1401-1408.
【24】李学达, 尚成嘉, 韩昌柴, 等. X100管线钢焊接热影响区中链状M-A组元对冲击韧性和断裂机制的影响[J]. 金属学报, 2016, 52(9):1025-1035.
【25】PAMNANI R, JAYAKUMAR T, VASUDEVAN M. Investigations on the impact toughness of HSLA steel arc welded joints[J]. Journal of Manufacturing Processes, 2016, 21:75-86.
【26】YAMAZAKI K, SUZUKI R, SHIMIZU H, et al. Spatter and fume reduction in CO2 gas-shielded arc welding by regulated globular transfer[J]. Welding in the World, 2012, 56(9/10):12-19.
【27】TSUYAMA T, YUDA M, NAKAI K. Effects of hot wire on mechanical properties of weld metal using gas-shielded arc welding with CO2 gas[J]. Welding in the World, 2014, 58(1):77-83.
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