METHOD OF PRODUCING A TOOL STEEL
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United States of America Patent
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Sep 13, 2018
app pub date -
Aug 3, 2016
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Aug 3, 2016
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In a method of producing a tool steel, in particular a hot-work tool steel, a steel of the following analysis: C: 0.25-0.6 weight-%, Si: max 0.15 weight-%, Mn: max. 0.3 weight-%, Mo: 2-5 weight-%, Cr: 0-2 weight-%, W: 1-3 weight-%, V: 0-2 weight-%, Ni: 0-3 weight-%, and a residue of iron and unavoidable impurities due to smelting is smelted and alloyed, wherein a workpiece of this steel is heated up and austenitized at temperatures >Ac3 and then cooled down, wherein the cooling is effected down to a temperature of 330° C. to 360° C. and the workpiece is held isothermally at this temperature, until the workpiece is completely bainitically transformed, followed by cooling down to room temperature, together with a hot-work tool steel for this purpose and its use.
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