铝合金车体结构焊接残余应力研究

Research of welding residual stress about aluminum alloy

采用X射线衍射法(iXRD)对铝合金部件的焊后、调修、部件组装后及其调修和部件喷丸后的焊接残余应力进行无损测量,研究铝合金部件的焊接残余应力分布情况及其变化规律,验证喷丸工艺调整焊接残余应力措施,为调整铝合金焊接残余应力的工程化处理方法和焊接接头辅助增强的工程技术提供数据支撑,以改善焊接接头的抗疲劳性能。研究结果表明,通过制定合理的焊接工艺,采用喷丸法能够有效地调整焊接残余应力,满足产品的安全可靠性需求。

The X-ray diffraction method （iXRD） hans been applied into the measurement of residual stress produced on the aluminum alloy welding parts.There are three states to measure welding residual stress,such as welded and mended, assembled and mended, and shot peening.We can study the distributing status and disciplinarian,and testify the step to adjust the welding residual stress by shot peening.The research supplys the data supports for welding residual stress engineering disposal and weld joint assistant consolidation to improve abilities against the gatigue.The research shows appropriate welding and shot peening technics can effectively adjust welding residual stress and meet the RAMS demands about the product.