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2. Punching times after grinding

Do you have the feeling that the life of some other international die companies is very good at the first punching, but the second and third life of the die after the cutting edge decreases quickly? 

Why? The hardened layer is not deep enough, the structure is not fine enough, and the toughness is not the best. 

Our moulds are different. The first time is good, and the second and third times are also good. Our dies are very durable. The hardened layer on the edge of the dies we processed has fine structure and high toughness.
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