Title:
A tool between heat, and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6156670
Kind Code:
B2
Abstract:
Provided is a hot-working tool capable of maintaining adequate toughness even if the permissible amount of P contained in the hot-working tool is increased. The present invention is a hot-working tool, which has a component composition that can be adjusted to a martensitic structure by quenching and has a post-quenching and tempering martensitic structure, wherein: the component composition comprises greater than 0.020 mass% to 0.050 mass% of P; prior austenite grain diameter in said post-quenching and tempering martensitic structure is at least No. 9.5 in grain size number according to JIS-G-0551; and the P concentration of the grain boundary of said prior austenite particles is not more than 1.5 mass%. A hot-working tool wherein said component composition also comprises not more than 0.0250 mass% of Zn is preferable. The present invention also is a method for manufacturing a hot-working tool in which quenching and tempering are performed on a hot-working tool material with said component composition.
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Inventors:
Yousuke Nakano
Application Number:
JP2017502018A
Publication Date:
July 05, 2017
Filing Date:
February 02, 2016
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
C22C38/00; B21D37/01; B21D37/20; B21J13/02; C21D9/00; C22C38/52
Domestic Patent References:
| JP2013082992A | ||||
| JP2010031366A | ||||
| JP2007224418A | ||||
| JP2013032576A |
Attorney, Agent or Firm:
Asamura patent office