摘要本文根据企业生产要求， 针对在钢基体上熔覆铜的要求，采用MIG焊方法在环形钢机体上熔覆纯铜层，要求铜-钢界面结合强度达到相应要求，并控制铜层泛铁程度。

根据MIG焊接系统，通过初步试验，确定了MIG焊的摆幅，摆频，焊接速度，电流电压大小等主要工艺参数。68196

通过试验分析，优化了基体层成型质量主要工艺参数，并得出电流与焊接速度是成型质量的最显著影响参数。

分析了焊接缺陷产生机理，总结了焊接缺陷特征，研究了主要工艺参数对熔覆层的成型质量影响，结果表明：

对在最佳工艺参数下熔覆焊的多组试件的检测结果表明，采用MIG熔覆焊熔覆铜层，可以保证钢基体基本不融化的基础上实现铜-钢的冶金结合。

分析表明，铜-钢界面平直，钢基体没有熔化，无气孔、未融合、夹渣等焊接缺陷，在界面处存在的成分迅速变化区及的过渡层，在过渡层外的铜层中不含铁。

毕业论文关键词  ： MIG焊，铜-钢界面，成型质量

毕业设计说明书（论文）外文摘要

Title   Copper and stainless steel composite tube plate  Research on  automatic welding

Abstract

According to the production requirements of enterprises, aiming at the steel substrate clad copper requirements, using MIG welding of pure copper layer surfacing in the annular steel body, requirement of copper - steel interface strength meet the requirements, and to control the degree of Pan iron copper layer.

According to the MIG welding system, through the preliminary test, the MIG welding swing, swing frequency, welding speed, the main parameters of current and voltage size etc..

Through test and analysis, the main process parameters matrix layer forming quality optimization, and the current and welding speed is the most significant impact molding quality parameters.

Analysis of the mechanism of Fe, summarizes the characteristics of Fe, the main process parameters of Fe of cladding layer effects, results show that:

Detection of multiple groups of specimens deposited in the optimum process parameters showed that, using MIG welding copper layer, can guarantee the basic steel matrix does not melt on the copper - steel metallurgy combination.

Analysis shows that the copper - steel, flat steel substrate interface, no melting, no pores, lack of fusion, slag and other welding defects, in the transition layer exists at the interface of components and the rapid changes, no iron copper layer on the transition layer in the.

Keyword: MIG, Fe penetration, Copper –steel interface, Forming quality

目录

1 绪论 1

1.1选题背景及意义 1

1.2 铜-钢异种金属焊接的研究现状和进展 1

1.2.1 铜-钢焊接特点 2

1.2.2 铜-钢焊接的方法 3

1.2.2.1熔焊 3

1.2.2.2 压焊 4

1.2.2.3 钎焊 6

1.2.3  铜-钢焊接接头组织性能 7

1.3 MIG电弧钎焊技术 8

1.3.1 MIG 电弧钎焊与普通钎焊的对比 8

1.3.2 MIG 电弧钎焊与普通钎焊的对比 9

1.3.3 MIG 电弧钎焊的焊接材料 11

1.4本课题的研究目的、内容及难点 12

1.4.1研究目的