Arc characteristics of GMA welding in high-pressure air condition  

作　　者：黄继强 薛龙 吕涛 牛虎理 唐德渝 蒋力培 

机构地区：[1]Opto-Mechatronic Equipment Technology Beijing Area Major Laboratory, BeijingInstitute of Petrochemical Technology, Beijing, 102617. [2]CNPC Research Institute of Engineering Technology,Tianjin, 300451.

出　　处：《China Welding》2012年第4期26-31,共6页中国焊接（英文版）

基　　金：Acknowledgement The authors are grateful to the financial support for this project from the Science and Technology Project of Beijing Municipal Edu- cation Commission under grant No. KM201110017005, from Nation- al Natural Science Foundation of China under grant No. 51275051 and from CNPC Research Institute of Engineering Technology.

摘　　要：Gas metal arc （ GMA ） welding process can be fluently executed under the range of 0. 1 - 0. 7 MPa air pressure shielded by C02 and ArS0% ＋ CO220% gases, which were tested by the igniting and exploding experiments using a hyperbaric chamber to simulate the underwater conditions. The arc voltage characteristics of the GMA welding were tested in hyperbaric conditions to discover the law of the welding arc affected by environmental pressure, welding current, stick-out, gas type and gas-flow. The experimental results and related discussion are also given in this paper. Finally, a mathematical model was calculated under high-pressure air condition based on the experimental data with the least square approximation method.Gas metal arc （ GMA ） welding process can be fluently executed under the range of 0. 1 - 0. 7 MPa air pressure shielded by C02 and ArS0% ＋ CO220% gases, which were tested by the igniting and exploding experiments using a hyperbaric chamber to simulate the underwater conditions. The arc voltage characteristics of the GMA welding were tested in hyperbaric conditions to discover the law of the welding arc affected by environmental pressure, welding current, stick-out, gas type and gas-flow. The experimental results and related discussion are also given in this paper. Finally, a mathematical model was calculated under high-pressure air condition based on the experimental data with the least square approximation method.

关 键 词：WELDING gas metal arc welding arc characteristics hyperbaric welding 

分 类 号：TG409[金属学及工艺—焊接] TH789[机械工程—仪器科学与技术]