振动时效和热时效对316L不锈钢焊接接头残余应力消除的研究

Study on residual stress relief of 316L stainless steel welded joint by vibration aging and thermal aging

本文采用不同的消应力方法及其组合对316L不锈钢焊接接头残余应力的影响进行了试验研究。结果表明,单纯的消应力热处理方式和进行机械振动时效处理均可有效去除焊缝及焊趾的峰值应力,应力峰值下降相当;采用振动时效+消应力热处理的方式与单纯的振动时效处理相比,应力峰值下降不明显,与先退火后振动时效相比,焊缝处应力峰值略有下降;采用消应力热处理+振动时效的方式,相比较单纯消应力热处理应力峰值下降明显,为以后的生产研究提供指导。

This article conducts experimental research on the effect of different stress relief methods and their combinations on residual stress in 316L stainless steel welded joints.The results show that both simple stress relief heat treatment and mechanical vibration aging treatment can effectively remove the peak stress of the weld seam and weld toe,with a significant decrease in peak stress;Compared with simple vibration aging treatment,the decrease in stress peak value is not significant when using vibration aging+stress relief heat treatment.Compared with annealing before vibration aging,the stress peak value at the weld seam slightly decreases;The use of stress relief heat treat-ment+vibration aging method significantly reduces the stress peak value compared to simple stress relief heat treat-ment,providing guidance for future production research.