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药芯焊丝CO2焊熔滴过渡现象的观察与分析
引用本文:王宝,杨林,王勇.药芯焊丝CO2焊熔滴过渡现象的观察与分析[J].焊接学报,2006,27(7):77-80.
作者姓名:王宝  杨林  王勇
作者单位:1. 中北大学,焊接材料技术中心,太原,030051
2. 太原理工大学焊接材料研究所,太原,030024
摘    要:药芯焊丝CO2气体保护焊熔滴行为对药芯焊丝工艺性有直接的影响.采用焊接过程的高速摄影技术和汉诺威焊接质量分析系统对药芯焊丝的熔滴过渡形态进行观察分析.证实随着焊接参数的变化,药芯焊丝可能形成排斥过渡、表面张力过渡和细熔滴过渡.在排斥过渡时,由于大熔滴在焊丝端部较长时间的停留,出现明显的熔滴自身的爆炸飞溅,气体的强烈逸出飞溅等现象,表面张力过渡是介于大熔滴的排斥过渡与细熔滴过渡二者之间的一种过渡形式.细熔滴过渡时,焊接过程稳定、飞溅小、焊缝成形良好、生产效率较高,是药芯焊丝理想的过渡形式.在细熔滴的过渡的条件下形成的渣柱对熔滴的过渡起着导向作用.

关 键 词:CO2气体保护焊  熔滴过渡  焊接电弧物理
文章编号:0253-360X(2006)07-077-04
收稿时间:11 17 2005 12:00AM
修稿时间:2005-11-17

Observation and analysis of metal transfer phenomena for flux-cored electrodes in CO2 arc welding
WANG Bao,YANG Lin and WANG Yong.Observation and analysis of metal transfer phenomena for flux-cored electrodes in CO2 arc welding[J].Transactions of The China Welding Institution,2006,27(7):77-80.
Authors:WANG Bao  YANG Lin and WANG Yong
Affiliation:Training Center of Welding Consumables Technology, North University of China, Taiyuan 030051, China,Training Center of Welding Consumables Technology, North University of China, Taiyuan 030051, China and Institute of Welding Materials, Taiyuan University of Technology, Taiyuan 030024, China
Abstract:Metal transfer behaviors of flux-cored wire in CO_2 arc welding have a direct effect on the usability of flux-cored electrodes.Using high speed photography and ANALYSATOR HANNOVER,metal transfer modes of flux-cored wire were observed and analyzed.The reseach results are confirmed.With the change of welding parameters,the metal transfer of flux-cored wire can be calssified into globular repelled transfer,surface tension transfer and small droplet transfer.For globular repelled transfer,due to the longer stop of big droplet in the end of wire,phenomena of explosive spatter from droplet and spatter owing to strong gas escape etc obviously appear.Surface tension transfer lies between globular repelled transfer and small droplet transfer.Small droplet transfer is the best transfor mode of flux-cored cleetrode because of stable welding process,little spettering,good weld appearance good and high produefinity.For small droplet transfer,the slag column has a guiding effect on the metal transfer.
Keywords:CO_2 arc welding  metal transfer  welding arc physics
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