一、叙言几百年来人们一直知道磨削会“烧伤”金属并使金属的强度降低。廿世纪四十年代开始,这种经验通过疲劳强度实例得到了定量化,下述实例是磨削淬火并回火至RC50°的AISI4340钢所得出的结论。低应力磨削102千磅/时~2 常规磨削75千磅/时~2 高应力磨削62千磅/时~2 First, the narrative For centuries people have always known that grinding will “burn” the metal and reduce the strength of the metal. Beginning in the 1940s, this experience was quantified using fatigue strength examples. The following examples are conclusions drawn from AISI 4340 steel, which is hardened and tempered to RC50 °. Low stress grinding 102 ksi / h ~ 2 Conventional grinding 75 ksi / h ~ 2 High stress grinding 62 ksi / h ~ 2