Metal treatment – Process of modifying or maintaining internal physical... – Utilizing disclosed mathematical formula or relationship
Patent
1993-08-24
1995-10-17
Yee, Deborah
Metal treatment
Process of modifying or maintaining internal physical...
Utilizing disclosed mathematical formula or relationship
148509, C21D 900
Patent
active
054587034
ABSTRACT:
A tool steel production method and a tool steel are disclosed in this invention. The method consists of following two steps:
1. Toughness (Ch) of the tool steel is evaluated from a formula:
Nippon Koshuha Steel Co. Ltd.
Yee Deborah
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