摘要本论文针对钛钢复合板特殊结构设计了焊接接头形式和坡口结构，采用脉冲熔化极气体保护焊和钨极氩弧焊的组合焊工艺方法，开展了1.5mm的TA1与10mm的Q235B爆炸复合板的自动焊接工艺研究。通过实验研究获得了合理的焊接工艺参数，包括钛合金和低碳钢复合板各层的优化工艺参数；研究分析了复合板接头各区域的微观组织、显微硬度分布，采用电镜扫描研究了焊缝区域的元素分布。试验结果表明：钛层采用TIG焊，选用焊接电流120A，焊接电压16V，焊接速度20cm/min；钢层采用PMIG焊，当焊接电流180A，焊接电压28V，焊接速度为20cm/min，可以得到焊缝成形良好的焊接接头，且控制了两层金属均没有焊透。从母材区到焊缝区，其显微维氏硬度呈逐渐上升。68232

毕业论文关键词  钛-钢爆炸复合板  脉冲熔化极气体保护焊（PMIG）  钨极氩弧焊（TIG）复合板坡口  

毕业设计说明书（论文）外文摘要

Title  Titanium steel explosive clad plate welding technology

Abstract

This thesis focuses on the special structure of titanium clad steel plate welded joints designed forms and groove structure, using pulsed MIG welding and TIG welding method combinations, carried out the TA1 and 10mm in 1.5mm Q235B explosive compound board automatic welding technology. Obtained through experiment reasonable welding process parameters, including titanium and low carbon steel composite plate layers optimization of process parameters; study analyzed the regional composite plate joints microstructure, microhardness distribution was studied using scanning electron microscopy welding seam area element distribution. The results showed that: the titanium layer using TIG welding, selection of welding current 120A, welding voltage 16V, welding speed 20cm/min; steel layer using PMIG welding, when the welding current is 180A, welding voltage 28V, welding speed 20cm/min, can be welded forming a good seam welded joints, and the control of the two layers of metal are no penetration. Region from the base material to the weld zone, which micro-Vickers hardness was gradually increased.

Key words Titanium-steel explosive clad plate, PMIG,TIG，Composite plate groove

目   次

1  引言 1

1.1课题的意义 1

1.2钛合金与钢焊接特性 1

1.3 试验焊接方法介绍 2

1.4爆炸复合板及其焊接的国内外研究现状 3

1.5钛钢爆炸复合板的特性 4

1.6本课题研究内容 6

2  试验材料及设备 7

2.1试样材料及焊接材料 7

2.2  试验设备 8

2.3 钛钢复合板焊接和分析过程 10

2.4金相组织观察 11

2.5硬度测试 12

2.6 EDAX电镜扫描 12

3  钛钢复合板自动拼焊的工艺及焊缝成型分析 14

3.1 Q235B堆焊工艺研究 14

3.2钛钢复合板对接焊接工艺试验研究 16

4爆炸复合板微观组织及力学性能 18

4.1金相结果分析 18

4.2扫描电镜实验结果分析 20