Interface Microstructure and Tensile Properties of Different-Bevel-Angle Galvanized Steel/Aluminum Alloy Joint by Laser Fusion Brazing
-
摘要: 采用ER4043焊丝对6061-T6铝合金板和AISI 1045镀锌钢板进行激光熔钎焊，铝合金板的坡口面角度为30°，钢板的坡口面角度分别为30°和60°，研究了钢侧钎焊界面的显微组织和微区成分，测试了接头的拉伸性能。结果表明：钢板坡口面角度为60°时接头在焊趾和焊根处的钎焊界面处均形成富锌区，并出现微孔洞，其他区域界面处形成了连续的金属间化合物层；钢板坡口面角度为30°时接头仅在焊趾处形成富锌区，整个钎焊界面处均形成了连续的金属间化合物层；在2种接头中，钢板坡口面下部区域的金属间化合物层厚度均较大，并且钢板坡口面角度为30°时接头中的金属间化合物层厚度大于钢板坡口面角度为60°时的；钢板坡口面角度分别为30°，60°时，接头的平均抗拉强度分别为120.3，151.7 MPa，拉伸断裂均发生在钢/焊缝界面处，均为解理断裂。Abstract: 6061-T6 aluminum alloy plate and AISI 1045 galvanized steel plate were welded by laser fusion brazing with ER4043 welding wires; the bevel angle of the aluminum alloy plate was 30°, and that of the steel was 30° and 60°, respectively.The microstructure and micro-zone composition of the brazing interface on the steel side were studied, and the tensile properties of the joint were tested.The results show that zinc-rich areas and microvoids were formed at weld toe and weld root on the brazing interface of the joint when the bevel angle of steel plate was 60°, and a continuous intermetallic compound layer was formed at other areas on the interface.For the joint wth the steel plate bevel angle of 30°, zinc-rich areas were only formed at the weld toe, and a continuous intermetallic compound layer was formed at the entire brazing interface.In the two joints, the thickness of the intermetallic compound layer on the lower area of the steel plate groove surface was higher.The thickness of the intermetallic compound layer in the joint with the steel plate bevel angle of 30° was greater than that with the steel plate bevel angle of 60°.The average tensile strength of joints with the steel bevel angles of 30° and 60° was 120.3, 151.7 MPa, respectively.The two joints fractured at the steel/weld interface during tension, and both fractured in cleavage fracture form.
-
Keywords:
- laser fusion brazing /
- aluminum alloy /
- galvanized steel /
- intermetallic compound /
- tensile property
-
-
[1] KATAYAMA S.Laser welding of aluminium alloys and dissimilar metals[J].Welding International, 2004, 18(8):618-625.
[2] AGUDO L, EYIDI D, SCHMARANZER CH, et al.Intermetallic FexAly-phases in a steel/Al-alloy fusion weld[J].Journal of Materials Science, 2007, 42(12):4205-4214.
[3] 陈树海,黄继华,陈彦宾.异种合金激光熔钎焊技术的现状与展望[J].焊接, 2011(4):27-33. CHEN S H, HUANG J H, CHEN Y B.The present situation and prospect on laser welding-brazing of dissimilar alloys[J].Welding, 2011(4):27-33.
[4] KOUADRI-DAVID A.Study of metallurgic and mechanical properties of laser welded heterogeneous joints between DP600 galvanised steel and aluminium 6082[J].Materials and Design, 2014, 54:184-195.
[5] 袁锐,邓胜杰,崔海超,等.铝-钢异质金属双光束激光焊接IMC层迁移行为及对界面性能的影响[J].机械工程学报, 2020, 56(6):33-40. YUAN R, DENG S J, CUI H C, et al.Characterization on IMC layer migration and interface properties in dual-beam laser welding of AA7075/DP590 alloys[J].Journal of Mechanical Engineering, 2020, 56(6):33-40.
[6] MOHAMMADPOUR M, YAZDIAN N, YANG G, et al.Effect of dual laser beam on dissimilar welding-brazing of aluminum to galvanized steel[J].Optics & Laser Technology, 2018, 98:214-228.
[7] 朱宗涛,万占东,薛珺予.不锈钢/铝合金异种金属激光-MIG熔钎焊工艺研究[J].材料导报, 2017, 31(12):52-55. ZHU Z T,WAN Z D,XUE J Y.Research on laser-MIG fusion-brazing welding of stainless steel/aluminum dissimilar metals[J].Materials Review, 2017, 31(12):52-55.
[8] 李猛,陈树海,杨磊磊,等.铝合金/碳钢激光-TIG复合热源熔钎焊工艺与接头显微结构分析[J].焊接学报, 2016(12):21-24. LI M, CHEN S, YANG L L, et al.Laser-TIG hybrid welding-brazing process of aluminum alloy/carbon steel and analysis of microstructures[J].Transactions of the China Welding Institution, 2016, 37(12):21-24.
[9] 李妍,刘宁,黄健康,等.添加不同合金粉末激光熔钎焊铝/钢异种金属接头的组织与性能[J].机械工程材料, 2018, 42(6):30-35. LI Y, LIU N, HUANG J K, et al.Structure and property of aluminum-steel dissimilar metal joint by laser fusion brazing with addition of different alloy powders[J].Materials for Mechanical Engineering, 2018, 42(6):30-35.
[10] 张建勋, 江旭, 徐甄真, 等.6061-T6铝合金/SPCC冷轧钢激光熔钎焊特性研究[J].机械工程学报, 2020, 56(6):41-49. ZHANG J X,JIANG X,XU Z Z,et al.Study on characteristics of laser welding-brazing of 6061 aluminum alloy to SPCC cold rolled steel[J].Journal of Mechanical Engineering, 2020, 56(6):41-49.
[11] LIU J, JIANG S C, SHI Y, et al.Effects of zinc on the laser welding of an aluminum alloy and galvanized steel[J].Journal of Materials Processing Technology, 2015, 224:49-59.
[12] YAGATI K P, BATHE R N, RAJULAPATI K V, et al.Fluxless arc weld-brazing of aluminium alloy to steel[J].Journal of Materials Processing Technology, 2014, 214(12):2949-2959.
[13] GATZEN M, RADEL T, THOMY C, et al.The role of zinc layer during wetting of aluminium on zinc-coated steel in laser brazing and welding[J].Physics Procedia, 2014, 56:730-739.
[14] WALLERSTEIN D, SOLLA E L, LUSQUIOS F, et al.Advanced characterization of intermetallic compounds in dissimilar aluminum-steel joints obtained by laser welding-brazing with AlSi filler metals[J].Materials Characterization, 2021, 179:111345.
[15] HSIEH M J, LEE R T, CHIOU Y C.Friction stir spot fusion welding of low-carbon steel to aluminum alloy[J].Journal of Materials Processing Technology, 2017, 240:118-125.
[16] SONG J L, LIN S B, YANG C L, et al.Effects of Si additions on intermetallic compound layer of aluminum-steel TIG welding-brazing joint[J].Journal of Alloys & Compounds, 2009, 488(1):217-222.
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
