摘要铝合金由于重量轻,比强度高,耐腐蚀性能好,无磁性,成型好及低温性能好等特点被广泛应用于各类焊接结构产品中。因此,提高铝合金焊接的生产效率和质量,寻找焊接缺陷少的焊接方法已成为当前实际生产的迫切需求。本文利用激光技术对轻质厚板高强4043铝合金进行对接,研究焊接过程,调整相应参数。观察外部成型及金相组织内出现的缺陷,并且提出相应的解决方案。进行硬度和拉伸试验,比较铝合金激光焊缝的强度。此外阐述铝合金激光焊接的研究现状以及未来发展方向,提出自己的想法。68234
毕业论文关键词 : 铝合金,激光焊接,强度,缺陷
毕业设计说明书(论文)外文摘要
Title Research on thick aluminum laser welding performance
Abstract
Because of the light weight, high strength, good corrosion resistance, non-magnetic, good shape and good low temperature performance characteristics,aluminum alloys are widely used in all kinds of welded construction products. Therefore,finding the methods with high productivity and quality, less welding defects welding has became the urgent need for actual production. In this paper,the author introduces the laser technology for lightweight high strength 4043 aluminum alloy plate for docking studies welding process, adjusting the corresponding parameters,observing the external shape and microstructure defects occur within, and propose appropriate solutions. Make the hardness and the tensile test, comparing the intensity of laser seam aluminum. Besides elaborate aluminum laser welding current research and future direction of development, put forward their own ideas.
Keywords:aluminum alloys,laser welding,strength,defect
目次
1 绪论 1
1.1 铝合金焊接性 1
1.2 激光焊接技术特点及发展情况 1
1.3 铝合金激光焊接的研究现状 3
1.4 铝合金激光焊接中出现的问题及解决方案 3
1.5 铝合金激光焊接的应用及发展趋势 5
1.6 本课题研究内容 5
2 试验材料及设备 7
2.1 焊接材料 7
2.2 实验设备 7
2.3 焊接过程 11
2.3.1 焊前处理 11
2.3.2 焊接装夹 11
2.3.3 焊接过程 12
2.4 拉伸试验 12
2.5 硬度测试 13
2.6 金相组织分析 14
3 变形铝硅合金激光焊接工艺试验研究 16
3.1 焊接规范 16
3.2 焊接外观成型 16
4 焊缝宏观及微观分析和焊接接头力学性能 20
4.1 焊缝形貌观测 20
4.1.1 离焦量对焊缝成形的影响 20
4.1.2 激光功率对焊缝成形的影响 21