Research On Semi-automatic Welding Technology Of Double Metal Composite Pipe

The with stainless steel inner lining,mechanical method of double metal composite pipe(hereinafter referred to as the composite pipe)as the object of study by different welding method,welding material,welding of the welding process test,the income of welded joints were comprehensive and in-depth testing,test,analysis of the mechanical properties,physical and chemical properties,corrosion resistance,microstructure demonstration and master composite pipe welding process the feasibility,advantages and disadvantages of,according to the technical scheme of strengths and weaknesses formulated different conditions under the optimal welding process,to ensure access to the excellent quality of the composite pipe welding joint.Based on composite pipe joints of microstructure and hardness analysis and simulation under the condition of coupon tests and electrochemical experiments,study on composite tube filled with argon welding process and argon free welding process for the two kinds of process scheme.Composite pipe welding joint microstructure condition,hardness change trend,change content of alloy elements,under the simulated oil field under high temperature and high pressure conditions,the welding joints of carbon dioxide corrosion resistance.The optimization of welding process is summarized.