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众所周知,由琴钢丝和高碳难拉拔钢丝制成的弹簧低温回火后其圈径是缩小的,而由奥氏体不锈钢丝制成的弹簧其圈径是膨胀的。原因是在回火时,残余应力的消除使钢丝形变而
It is well-known that a spring made of piano wire and high-carbon, hard-drawn steel wire has a reduced diameter when tempered at a low temperature and a spring made of an austenitic stainless steel wire whose diameter is expanded. The reason is that the tempering, the elimination of residual stress deformation of the wire