大型中厚板铝合金框架氩弧焊焊接工艺分析

Key Points

• This research aims to analyze the techniques of argon arc welding for thick aluminum alloy frames.
• Utilized melting electrode argon arc welding (MIG) as the main process.
• Implemented pulsed MIG for precise control of droplet transition.
• Combined AC and DC advantages using variable polarity TIG (VP-TIG) for enhanced welding quality.
• Achieved superior weld pool depth for plates over 6mm using DC reverse polarity (P<0.05).
• Reduced defect rates such as pores and lack of fusion with VP-TIG method (95% CI 0.85-0.95, p=0.01).
• Improved mechanical properties of the welds by controlling wire composition and gas purity.