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对铸镁机轮采用滚压强化可有效地提高其疲劳强度并延长使用寿命。滚压力是保证强化效果的最主要参数。作者根据变形区的特点,采用球形端部圆柱冲头压入塑性体的假设,提出了一种滚压力的计算公式。滚压强化效果的评定方法是采用疲劳试验及残余应力实测试验。
The cast magnesium wheel rolling strengthening can effectively improve the fatigue strength and extend the service life. Rolling pressure is the most important parameter to ensure the strengthening effect. According to the characteristics of the deformation zone, the author adopts the assumption that the ball-end cylindrical punch is pressed into the plastic body, and a calculation formula of rolling force is proposed. Rolling strengthening effect of the assessment method is the use of fatigue test and residual stress test.