在说明书上看到一句话不懂请教高手? positive material identification of the finished products shall be performed if traceability to their certificates by copying charge numbers throughout all stages of the manufacturing process by means of “low stress” hard stamping is not feasible because of size or functionality of the fabricated part. 通常情况下,都是通过在金属零件上打"低压"钢印来识别材料,以实现其可追溯性,零件经过的每道工序都应有标记。如果零件太小或者受焊件功能限制,就不能打钢印,只能在成品上进行pmi检测。 pmi-是指对材料进行比对测试,以确保材料是符合要求的。查看更多