焊接速度对304L钢薄板激光焊接接头性能的影响
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摘要
通过0.4 mm厚304L钢薄板的激光焊接试验,研究了焊接速度对焊接接头宏观形貌、硬度分布以及拉伸性能的影响。结果表明:在设定的5种焊接速度(200、250、300、350、400 mm/min)下获得的焊缝熔宽均较为均匀,焊接接头均为全熔透状态,熔宽随着焊接速度的提高而减小;焊接接头硬度均大于母材且其横截面分布趋势都呈M形,焊缝区硬度随焊接速度的提高而增大;拉伸试样均于焊缝区断裂,其抗拉强度、屈服强度、断后伸长率随着焊接速度提高而增大,但都小于母材性能,当焊接速度为400 mm/min时,焊接接头的拉伸性能最佳。
Based on the laser welding experiment of 0.4 mm thick 304 L steel sheet, the effects of welding speeds on the macroscopic morphology, hardness distribution and tensile properties of the welded joint were compared. The results show that the weld widths obtained at the five welding speeds(200, 250, 300, 350, 400 mm/min) are relatively uniform, the welded joints are fully penetrated, and the weld width decreases with increasing welding speed; the joint hardness is larger than the base metal and its cross-section distribution. The trend is M-shaped, the hardness of the weld zone increases with the increase of welding speed; the tensile specimens are broken in the weld zone, and the tensile strength, yield strength and elongation after fracture increase with the increase of welding speed. However, they are all less than the properties of the base metal. When the speed is 400 mm/min, the tensile properties of the welded joint are the best.
Based on the laser welding experiment of 0.4 mm thick 304 L steel sheet, the effects of welding speeds on the macroscopic morphology, hardness distribution and tensile properties of the welded joint were compared. The results show that the weld widths obtained at the five welding speeds(200, 250, 300, 350, 400 mm/min) are relatively uniform, the welded joints are fully penetrated, and the weld width decreases with increasing welding speed; the joint hardness is larger than the base metal and its cross-section distribution. The trend is M-shaped, the hardness of the weld zone increases with the increase of welding speed; the tensile specimens are broken in the weld zone, and the tensile strength, yield strength and elongation after fracture increase with the increase of welding speed. However, they are all less than the properties of the base metal. When the speed is 400 mm/min, the tensile properties of the welded joint are the best.
引文
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[10] GHOSH N,PAL P K,NANDI G.GMAW dissimilar welding of AISI 409 ferritic stainless steel to AISI 316L austenitic stainless steel by using AISI 308 filler wire[J].Journal of Engineering Science and Technology,2017(20):1334-1341.
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[13] 王安,张林杰,宁杰,等.焊接速度对2A97铝锂合金激光焊接接头的影响[J].激光杂志2016,37(2):98-102.
[14] 李永杰.气孔和裂纹对高氮钢光纤激光焊接接头力学性能的影响[J].应用激光,2017,37(5):681-686.
[15] 张雪亚,宗磊,韩毅华,等.大线能量埋弧焊DH36船板钢焊接接头的拉伸性能研究[J].热加工工艺,2018,47(3):226-229.
[2] 张国栋,杨辉,王麒瑜,等.铁素体不锈钢激光熔覆层组织和性能研究[J].机械工程学报,2016,52(12):37-45.
[3] 王睿,张军伟,梁涛,等.薄板激光焊焊接工艺流程及不稳定性控制[J].焊接技术,2014,42(2):24-26.
[4] 杜祥永,彭林法,易培云,等.316L不锈钢超薄板激光焊接工艺试验研究[J].热加工工艺,2015,44(19):17-20.
[5] 梁伟,马峰,张渝,等.薄板焊接变形高精度预测方法的研究[J].船舶力学,2017,21(4):437-442.
[6] 段爱琴,巩水利,刘飞.激光焊接工艺参数对5A90红外温度场特征的影响[J].焊接学报,2017,38(11):97-102.
[7] 邹琼琼,龚红英,黄继龙,等.激光焊接技术的研究现状及发展[J].热加工工艺,2016,45(21):20-23.
[8] FU Bang-long,QIN Guo-liang,MENG Xiang-meng,et al.Microstructure and mechanical properties of newly developed aluminum-lithium alloy 2A97 welded by fiber laser[J].Materials Science & Engineering A,2014,617(3):1-11.
[9] 赵德望,任大鑫,赵坤民,等.工艺参数对镁钛异质金属超声波点焊接接头拉伸性能及疲劳性能的影响[J].机械工程学报,2017,53(34):118-125.
[10] GHOSH N,PAL P K,NANDI G.GMAW dissimilar welding of AISI 409 ferritic stainless steel to AISI 316L austenitic stainless steel by using AISI 308 filler wire[J].Journal of Engineering Science and Technology,2017(20):1334-1341.
[11] VENKATKUMAR D,RAVINDRAN D.3D finite element simulation of temperature distribution,residual stress and distortion on 304 stainless steel plates using GTA welding[J].Journal of Mechanical Science and Technology,2016,30(1):67-76.
[12] ZHANG Y,SUN D Q,GU X Y,et al.Nd/YAG pulsed laser welding of TC4 titanium alloy to 301L stainless steel via pure copper interlayer[J].Journal of Advance Manufactur-ing Technology,2017(90):953-961.
[13] 王安,张林杰,宁杰,等.焊接速度对2A97铝锂合金激光焊接接头的影响[J].激光杂志2016,37(2):98-102.
[14] 李永杰.气孔和裂纹对高氮钢光纤激光焊接接头力学性能的影响[J].应用激光,2017,37(5):681-686.
[15] 张雪亚,宗磊,韩毅华,等.大线能量埋弧焊DH36船板钢焊接接头的拉伸性能研究[J].热加工工艺,2018,47(3):226-229.