CAJ | 학술논문

为了改善钢/铝熔钎焊中钎焊缝与钢一侧接合界面上冶金反应的不均匀性，进而提高接头的拉伸强度，采用仿真模拟及实验相结合的方法研究了 V 型坡口对钢/铝激光对接熔钎焊性能的影响。利用 ANSYS 软件对钢/铝激光对接熔钎焊温度场进行仿真，在镀锌钢板上开设 V 型坡口时，接合界面靠近上表面与靠近下表面的温度梯度（为241℃）较不开坡口时的温度梯度（为588℃）明显减小；分别在镀锌钢板上开设 V 型坡口与不开设坡口的钢/铝异种金属进行激光对接熔钎焊试验，并对试样进行拉伸测试。结果表明，在镀锌钢板上开设 V 型坡口的情况下，接合界面上金属间化合物层的厚度分布较不开坡口均匀；V 型坡口的存在使得断裂位置远离接合界面，接头的机械性能明显改善。
위료개선강/려용천한중천한봉여강일측접합계면상야금반응적불균균성，진이제고접두적랍신강도，채용방진모의급실험상결합적방법연구료 V 형파구대강/려격광대접용천한성능적영향。이용 ANSYS 연건대강/려격광대접용천한온도장진행방진，재도자강판상개설 V 형파구시，접합계면고근상표면여고근하표면적온도제도（위241℃）교불개파구시적온도제도（위588℃）명현감소；분별재도자강판상개설 V 형파구여불개설파구적강/려이충금속진행격광대접용천한시험，병대시양진행랍신측시。결과표명，재도자강판상개설 V 형파구적정황하，접합계면상금속간화합물층적후도분포교불개파구균균；V 형파구적존재사득단렬위치원리접합계면，접두적궤계성능명현개선。
In order to improve the homogeneity of metallurgical reaction on the bonding interface between seam and steel so as to improve the tensile strength of a specimen,the effect of V-shaped grooves on properties of laser welding-brazing steel-aluminum butt joints was discussed by means of simulation combined with experiments.Frist,the temperature field of laser welding steel-aluminum butt was simulated by means of ANSYS.It was found that the temperature gradient on the bonding interface when there was a V-shaped groove on galvanized steel was lower than that when there was no grooves on galvanized steel.Then the experiments were carried out for laser welding steel-aluminum butt joints with and without V-shaped grooves on galvanized steel respectively,and the specimens were subjected to a tensile test.The result showed that distribution of intermetallic compounds on the bonding interface between the seam and galvanized steel with a V-shaped groove was more uniform than that without grooves.The V-shaped groove on the base material made the fracture far away from the bonding interface and the mechanical property of the joint was improved significantly.