摘要采用复合热源螺柱焊，研究了螺柱中不同奥氏体含量对复合热源螺柱焊焊接接头质量的影响，实验表明，随着奥氏体成分的增加，焊接接头质量越好；针对实际焊接条件下存在的非对称结构以及高拘束状态条件下大直径螺柱与高强高硬中碳调质钢的焊接接头易出现延迟裂纹的现象，开展厚大构件冷裂模拟试验、焊接工艺试验等研究工作，试验采用感应加热与螺柱电弧相复合的方式，能有效降低焊接接头残余应力、焊接接头含氢量，试验中试样为出现延迟裂纹。68175

毕业论文关键词  螺柱焊、复合热源、接头成分、延迟裂纹

毕业设计说明书（论文）外文摘要

Title    The influence of composition  on welding joint’s  quality of composite heat source stud welding                                                  

Abstract with composite heat source stud welding stud ，The experiment investigated the effect of different austenite content on the composite heat source stud welding quality of welding joint，the experimental results show that with the increase of austenite composition，the better the quality of welding joint； In the view of the actual welding conditions of existence asymmetric strueture and high  restrain of large diameter studs welding with high carbon steels，the welding bead always appears the Phenomenon of delay crack.Research carried out the work of delay crack simulation test，welding Proeess test，etc，Using the method of induetion heating/arc sutd welding can effeetively reduce the residual stress of welding joint，the amount of hydrogen of welding bead，and test sample do not appear the phenomenon o fdelay crack.

Keywords  studs welding，compound heat sources，Joint components，delayed crack

目 录

1  绪论 1

1.1  课题研究的背景及意义 1

1.2  螺柱焊接技术的发展与应用 1

1.2.1  螺柱焊的特点 2

1.2.2  电弧螺柱焊原理 2

1.2.3  电弧螺柱焊分类 3

1.3  复合热源螺柱焊接技术 4

1.4  冷裂纹的形成影响因素及防止措施： 6

1.4.1  冷裂纹的形成影响因素氢的作用 6

1.4.2  防止冷裂纹的措施[20] 6

1.5  研究内容 7

2  实验材料及设备 8

2.1  实验材料 8

2.2  实验设备 9

2.2.1  复合热源螺柱焊机器人系统 9

2.2.2  复合热源螺柱焊焊接电源 10

2.2.3  复合热源螺柱焊自动螺柱焊枪 11

2.2.4  复合热源螺柱焊感应加热电源 11

2.3  本章小结 11

3  复合热源螺柱焊接过程冷裂纹产生过程试验研究 12

3.1  复合热源螺柱焊冷裂纹试验方案 12

3.2  16mmQ235螺柱在616板上的焊接