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In recent years, China's mold production and sales continue
In order to obtain high surface hardness and wear resistance
With the continuous expansion of China's economic scale and
With the continuous development of economy, people's living
To solve the problem of drawing damage in the forming proces
1、 Improve the corrosion resistance of ferrous metals; At pr
1. Feeding method of progressive die: 1. Feeding on both sid
1、 Low hardness The large amount of retained austenite is
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