原来他用的是SKH-9高速钢，硬度HRC58左右，不耐用。后面老板把模具速度降低到同行的一半了，也还是经常出现崩缺。 由于插头片产品本身尺寸小，产品千奇百怪的，R角尺寸有限制的，不好修改，就只能靠模具钢本身去硬抗了，所以老板找到我，想看看用什么 ...

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Ensure words are spelled correctly. Try rephrasing keywords or using synonyms. Try less specific keywords. Make your queries as concise as possible.