不同气体药芯焊丝保护焊接工艺研究 - 图文

毕业设计说明书（论文）中文摘要

Ar/CO2不同气体药芯焊丝保护焊接工艺研究 摘要： 本文对Ar气和CO2气药芯焊丝熔化极保护焊的焊接工艺进行了对比研究，在合理的焊接规范工艺参数下；比较了这两种不同保护气体的熔滴过渡形式，有无飞溅，焊缝成形，熔池形状和力学性能；针对这些现象上的不同，从焊接规范参数、电弧力和焊接时的氧化还原等方面给出了解释。基于焊接工艺的角度，提出了采用Ar+CO2混合保护气体焊接的建议。 关键词：CO2气；Ar气；熔化极保护焊；熔滴过渡 I

毕业设计说明书（论文）外文摘要

Title Technology Research of Different Gas Ar/CO2 Flux-cored Wire Protection Welding Abstract In this paper, the Ar gas and CO2 gas flux-cored wire melting of welding welding technology extremely protection makes a comparative study, in the rational welding standard process parameters. Comparison of these two kinds of different protection gas of melting drops of transition form, have without splash, weld pool, pool shape and mechanical properties; According to the phenomenon of the different from standard parameters, welding and welding arc force when oxidation and reduction of the explanation is given, etc. Based on the point of view of welding technology, and put forth the Ar + CO2 mixed gas welding advice protection. Keywords : CO2; Ar ; Melting extremely protection welding ; Melt drops of transition II

毕业设计说明书（论文）

目录

前言 ....................................................................................................... 1 第一章 绪论 ................................................................................................ 2

1.1 CO2气熔化极保护焊 ..................................................................... 2

1.1.1 CO2气熔化极保护焊原理 ..................................................... 2 1.1.2 CO2气熔化极保护焊特点 ..................................................... 2 1.1.3 CO2气熔化极保护焊的冶金特性 .......................................... 3 1.1.4 焊接规范参数的选择 ........................................................... 4 1.1.5 熔滴过渡 .............................................................................. 6 1.1.6 电弧力 .................................................................................. 8 1.1.7 飞溅产生的原因 ................................................................. 11 1.1.8 减少飞溅的方法 ................................................................. 11 1.1.9 CO2焊的应用 ....................................................................... 13 1.2 Ar气熔化极保护焊 ........................................................................ 13

1.2.1 Ar气熔化极保护焊原理 ..................................................... 13 1.2.2 Ar气熔化极保护焊特点 ..................................................... 13 1.2.3 Ar气熔化极保护焊的焊接技术 .......................................... 14 1.2.4熔滴过渡 ............................................................................. 15 1.2.5 Ar气熔化极保护焊的应用 .................................................. 17 1.3 本课题研究的内容及目的 ............................................................ 17

1.3.1 本课题研究的内容 ............................................................. 17 1.3.2 本课题研究目的 ................................................................. 18

第二章 焊接材料与设备 ............................................................................ 19

2.1 试样准备 ....................................................................................... 19

2.1.1 材料 .................................................................................... 19 2.1.2 气体 .................................................................................... 20 2.2 焊接设备的选择 ........................................................................... 20 2.3 方法 ............................................................................................... 21

III

第三章 CO2气熔化极保护焊 ..................................................................... 22

3.1 焊接实际 ....................................................................................... 22 3.2 焊接参数 ....................................................................................... 22 3.3 焊缝成形 ....................................................................................... 22 3.4 熔滴过渡 ....................................................................................... 24 3.5 熔池形状 ....................................................................................... 24 3.6 力学性能 ....................................................................................... 24 第四章 Ar气熔化极保护焊 ...................................................................... 27

4.1 焊接实际 ....................................................................................... 27 4.2 焊接参数 ....................................................................................... 27 4.3 焊缝成形 ....................................................................................... 27 4.3 熔滴过渡 ....................................................................................... 29 4.4 熔池形状 ....................................................................................... 29 4.5 力学性能 ....................................................................................... 29 第五章 Ar气和CO2气熔化极保护焊工艺对比 ....................................... 31

5.1 熔池形状的影响因素 .................................................................... 31

5.1.1 焊接规范参数 ..................................................................... 31 5.1.2 深宽比 ................................................................................ 32 5.1.3 熔滴过渡形式 ..................................................................... 35 5.2 飞溅对比 ....................................................................................... 36

5.2.1 CO2电弧焊产生飞溅的原因及危害 .................................... 36 5.2.2 减少飞溅的方法 ................................................................. 36 5.3 力学性能对比 ............................................................................... 37

5.3.1 硬度 .................................................................................... 37

第六章 结论 ................................................................................................ 38 参考文献 ..................................................................................................... 39

致谢 ..................................................................................................... 41

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