14 mm厚EH36高强钢光纤激光-MAG复合焊工艺及接头组织性能
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摘要
利用光纤激光-MAG复合焊工艺焊接了14 mm厚的EH36高强钢,研究了激光功率、焊接速度和焊接电流对焊缝成形的影响,并分析了优化工艺下焊接接头的组织和性能。结果表明,随着激光功率的增大,焊缝的熔深增大,熔宽基本不变;随着焊接速率的增大,焊缝的熔宽减小;随着焊接电流的增大,焊缝的熔宽基本不变。最佳焊接工艺下得到的焊缝成形良好且无焊接缺陷存在;焊缝及热影响区的组织主要由板条马氏体组成;焊缝金属的硬度大于母材的;拉伸试样断裂位置在母材;焊缝横向侧弯试验后,拉伸面没有出现裂纹;焊缝冲击试样断面为准解理断口形貌。
The 14 mm thick EH36 high strength steels are welded by the fiber-laser-MAG hybrid welding process. The effects of laser power, welding speed and welding current on the weld formation are investigated and the microstructures and perfomances of welded joint under the optimal process parameters are analyzed. The results show that the weld penetration increases and the weld width is basically unchanged with the increase of laser power. With the increase of welding speed, the weld width decreases and with the increase of welding current, the weld width is basically unchanged. Under the optimal welding process parameters, the weld formation is good and there are no welding defects. The microstructures of the heated affected zone and weld zone are mainly composed of lath martensite. The hardness of weld metal is greater than that of the base metal. The fracture position of the tensile specimen is within the base metal. There are no cracks on the tensile surface after the transverse bending test. The fracture morphology of weld impact specimen is quasi cleavage fracture.
The 14 mm thick EH36 high strength steels are welded by the fiber-laser-MAG hybrid welding process. The effects of laser power, welding speed and welding current on the weld formation are investigated and the microstructures and perfomances of welded joint under the optimal process parameters are analyzed. The results show that the weld penetration increases and the weld width is basically unchanged with the increase of laser power. With the increase of welding speed, the weld width decreases and with the increase of welding current, the weld width is basically unchanged. Under the optimal welding process parameters, the weld formation is good and there are no welding defects. The microstructures of the heated affected zone and weld zone are mainly composed of lath martensite. The hardness of weld metal is greater than that of the base metal. The fracture position of the tensile specimen is within the base metal. There are no cracks on the tensile surface after the transverse bending test. The fracture morphology of weld impact specimen is quasi cleavage fracture.
引文
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[11] Li D Q, Wang S S. Study on microstructures and properties of welded joint for EH36 steel with high heat input[J]. Angang Technology, 2017(3): 14-18. 李德强, 王树森. EH36大线能量用钢焊接接头组织与性能研究[J]. 鞍钢技术, 2017(3): 14-18.
[12] Wei J S, Qi Y C, Peng Y, et al. Effect of heat input on the microstructure and properties of weld metal welding in a 800 MPa grade heavy steel plate with narrow gap groove[J]. Transactions of the China Welding Institution, 2012, 33(6): 31-34. 魏金山, 齐彦昌, 彭云, 等. 热输入对800 MPa级超厚板窄间隙焊缝金属组织和性能的影响[J]. 焊接学报, 2012, 33(6): 31-34.
[13] An T B, Shan J G, Wei J S, et al. Effect of heat input on microstructure and performance of welded joint in 1000 MPa grade steel for construction machinery[J]. Journal of Mechanical Engineering, 2014, 50(22): 42-49. 安同邦, 单际国, 魏金山, 等. 热输入对1000 MPa级工程机械用钢接头组织性能的影响[J]. 机械工程学报, 2014, 50(22): 42-49.
[14] Wang Q M, Qiao J N, Zou J L, et al. Fiber laser-variable polarity TIG hybrid welding of A7N01 aluminum alloy with filler wire[J]. Chinese Journal of Lasers, 2016, 43(6): 0602004. 王启明, 乔俊楠, 邹江林, 等. A7N01铝合金光纤激光-变极性TIG复合填丝焊接工艺研究[J]. 中国激光, 2016,43(6): 0602004.
[15] Xu G J, Zhu Y, Hang Z X, et al. CO2 laser-MAG hybrid welding performance of high strength steel[J]. Transactions of the China Welding Institution, 2016, 37(7): 17-21. 徐国建, 祝影, 杭争翔, 等. 高强钢CO2激光-MAG复合焊接性能[J]. 焊接学报, 2016, 37(7): 17-21.
[2] Zhang G H, Cheng L, Li Y, et al. Progress on marine corrosion resistant steels[J]. Materials China, 2014, 33(7): 426-435. 张国宏, 成林, 李钰, 等. 海洋耐蚀钢的国内外进展[J]. 中国材料进展, 2014, 33(7): 426-435.
[3] Wang B. Research on welding process of EH36 marine high strength steel[J]. Marine Vocational Education, 2017, 5(1): 59-61. 王博. EH36船用高强度钢焊接工艺研究[J]. 船舶职业教育, 2017, 5(1): 59-61.
[4] Sui Z Q, Qi Y C, Wang J L, et al. Effects of welding processes on microstructure and corrosion resistance of weld metal of corrosion resistant ship plate steel DH36[J]. Materials for Mechanical Engineering, 2016, 40(3): 61-65. 隋志强, 齐彦昌, 王军丽, 等. 焊接工艺对DH36耐蚀船板钢焊缝金属组织与耐蚀性能的影响[J]. 机械工程材料, 2016, 40(3): 61-65.
[5] Li Z, Wu Y M, Zhang J X, et al. Study on thermal cycle and microstructure characteristics of 10CrNiCu steel by hybrid laser-MAG welding[J]. Development and Application of Materials, 2014, 29(1): 18-22. 李治, 吴艳明, 张俊旭, 等. 10CrNiCu钢激光-MAG复合焊热循环及组织特性研究[J]. 材料开发与应用, 2014, 29(1): 18-22.
[6] Jia J, Yang S L, Ni W Y, et al. Study on microstructure and properties of laser welding joints of marine high strength steel E36[J]. Chinese Journal of Lasers, 2014, 41(2): 0203002. 贾进, 杨尚磊, 倪维源, 等. 船用高强钢E36激光焊接接头组织和性能的研究[J]. 中国激光, 2014, 41(2): 0203002.
[7] Tan C W. Research on welding characteristics of EH36 steel by using double-sided arc welding[D]. Harbin: Harbin Institute of Technology, 2009. 檀财旺. EH36钢厚板双面双弧立焊焊接特性研究[D]. 哈尔滨: 哈尔滨工业大学, 2009.
[8] Feng X Y, Qi Y C, Peng Y, et al. Investigation on corrosion behaviors of anti-corrosion steels joints for cargo oil tanks[J]. Journal of Iron and Steel Research, 2012, 24(3): 44-49. 冯向阳, 齐彦昌, 彭云, 等. 货油舱用耐蚀钢焊接接头的耐腐蚀性能[J]. 钢铁研究学报, 2012, 24(3): 44-49.
[9] Cater S, Martin J, Galloway A, et al. Comparison between frication stir and submerged arc welding applied to joining DH36 and E36 shipbuilding steel[J]. Friction Stir Welding and Processing, 2013, 7: 49-58.
[10] Roepke C, Liu S, Kelly S, et al. Hybrid laser arc welding process evaluation on DH36 and EH36 steel[J]. Welding Journal, 2010, 89(7): 140S-150S.
[11] Li D Q, Wang S S. Study on microstructures and properties of welded joint for EH36 steel with high heat input[J]. Angang Technology, 2017(3): 14-18. 李德强, 王树森. EH36大线能量用钢焊接接头组织与性能研究[J]. 鞍钢技术, 2017(3): 14-18.
[12] Wei J S, Qi Y C, Peng Y, et al. Effect of heat input on the microstructure and properties of weld metal welding in a 800 MPa grade heavy steel plate with narrow gap groove[J]. Transactions of the China Welding Institution, 2012, 33(6): 31-34. 魏金山, 齐彦昌, 彭云, 等. 热输入对800 MPa级超厚板窄间隙焊缝金属组织和性能的影响[J]. 焊接学报, 2012, 33(6): 31-34.
[13] An T B, Shan J G, Wei J S, et al. Effect of heat input on microstructure and performance of welded joint in 1000 MPa grade steel for construction machinery[J]. Journal of Mechanical Engineering, 2014, 50(22): 42-49. 安同邦, 单际国, 魏金山, 等. 热输入对1000 MPa级工程机械用钢接头组织性能的影响[J]. 机械工程学报, 2014, 50(22): 42-49.
[14] Wang Q M, Qiao J N, Zou J L, et al. Fiber laser-variable polarity TIG hybrid welding of A7N01 aluminum alloy with filler wire[J]. Chinese Journal of Lasers, 2016, 43(6): 0602004. 王启明, 乔俊楠, 邹江林, 等. A7N01铝合金光纤激光-变极性TIG复合填丝焊接工艺研究[J]. 中国激光, 2016,43(6): 0602004.
[15] Xu G J, Zhu Y, Hang Z X, et al. CO2 laser-MAG hybrid welding performance of high strength steel[J]. Transactions of the China Welding Institution, 2016, 37(7): 17-21. 徐国建, 祝影, 杭争翔, 等. 高强钢CO2激光-MAG复合焊接性能[J]. 焊接学报, 2016, 37(7): 17-21.