Title:
HOT WORK TOOL STEEL HAVING EXCELLENT THERMAL CONDUCTIVITY AND TOUGHNESS
Document Type and Number:
Japanese Patent JP2017061712
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a steel for a mold having both of high level toughness and thermal conductivity and applicable for a die cast, a hot stumping or the like.SOLUTION: A hot work tool steel has excellent thermal conductivity and toughness, and contains, by mass%, C:0.20 to 0.60%, Si:less than 0.50%, Mn:over 0.60 and less than 1.50%, Cr:less than 4.00%, 2Mo+W:3.0 to less than 13.0%, Mo:0.5 to 5.0% and W:less than 4.0%, V:less than 1.00%, Nb:less than 1.0%, N:less than 0.030% and the balance Fe with inevitable impurities, and has ΔC:-0.300 to 0.300% and B value:0.74 to 0.94, where Ceq is 0.20% or more and ΔC=C-Ceq and B value=(0.063×%Mo+0.033×%W+0.2×%V+0.1×%Nb)/Ceq are satisfied.SELECTED DRAWING: None
Inventors:
SHIMAMURA YUTA
Application Number:
JP2015186625A
Publication Date:
March 30, 2017
Filing Date:
September 24, 2015
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD
International Classes:
C22C38/00; B21D37/01; C22C38/26; C22C38/48
Domestic Patent References:
| JPS416884B1 | ||||
| JPH07102342A | 1995-04-18 | |||
| JP2002509986A | 2002-04-02 | |||
| JP2012522886A | 2012-09-27 | |||
| JP2010500471A | 2010-01-07 | |||
| JPH0688163A | 1994-03-29 |
Foreign References:
| CN101476082A | 2009-07-08 |
Attorney, Agent or Firm:
Kenji Yokoi
Yokoi Satoshi
Hiroshi Yokoi
Yokoi Satoshi
Hiroshi Yokoi
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