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 毕 业 设 计 说 明 书 （ 论 文 ） 外 文 摘 要Title Technology Research of Different Gas Ar/CO 2 Flux-cored Wire Protection Welding AbstractIn 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 目 录前言....................................................................................................1第一章 绪论.................................................................................21.1 CO2 气熔化极保护焊...............................................21.1.1 CO2气熔化极保护焊原理.........................21.1.2 CO2气熔化极保护焊特点.........................21.1.3 CO2气熔化极保护焊的冶金特性. .31.1.4 焊接规范参数的选择.............................41.1.5 熔滴过渡.....................................
