Tool steel production method
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United States of America Patent
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Oct 17, 1995
Issued Date -
N/A
app pub date -
Aug 24, 1993
filing date -
Jun 22, 1991
priority date (Note) -
Expired
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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: Ch=f(Vp, H, T) after estimating Vp, a square sum of output voltage of total Barkhausen noise signals which are produced in the process of magnetization of the tool steel sample, and measuring temperring hardness (H) and hardening temperature (T) of the tool steel sample. 2. A tool steel having a required toughness is produced by adjusting temperring hardness (H) and/or hardening temperature (T) based on the toughness evaluation of the tool steel sample mentioned above.
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