铸件使用中产生的缺陷,常常采用焊接的方法进行修复,由于焊接加热和冷却的不均匀性,铸件在焊后会产生较大的焊接残余应力。设法减少或消除焊接残余应力是保证焊缝修复质量的关键。实践证明,加热减应区法是一种行之有效的减少焊接残余应力的方 Casting defects, often using welding methods to repair, due to the uneven heating and cooling welding, casting after welding will have a greater welding residual stress. Try to reduce or eliminate welding residual stress is the key to ensure the quality of the weld repair. Practice has proved that heating zone method is to reduce the effective reduction of welding residual stress of the party