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Title:
DIE STEEL HAVING EXCELLENT MACHINABILITY AND MIRROR FINISHING PROPERTY
Document Type and Number:
Japanese Patent JP3736751
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide plastic die steel which has excellent machinability and mirror finishing properties.
SOLUTION: The die steel having excellent machinability and mirror finishing properties has a composition containing, by mass, 0.01 to 0.3% C, ≤1.0% Si, 0.1 to 0.4% Mn, 1.0 to 4.0% Ni, 0.1 to 5.0% Cr, 0.3 to 1.5% Al, 0.3 to 1.5% Cu, 0.05 to 0.2% S, and the balance Fe with inevitable impurities, and in which the ratio of Mn/S is controlled to ≤2.0, and the hardness of inclusions is controlled to 300 to 500 HV. Alternatively, the die steel having excellent machinability and mirror finishing properties further contains one or two kinds selected from Se and Te in ≤0.5% to the above componential composition.


Inventors:
横井 大円
藤松 威史
Application Number:
JP2002002451A
Publication Date:
January 18, 2006
Filing Date:
January 09, 2002
Export Citation:
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Assignee:
山陽特殊製鋼株式会社
International Classes:
B29C33/38; C22C38/00; C22C38/60; (IPC1-7): C22C38/00; B29C33/38; C22C38/60
Domestic Patent References:
JP11140591A
JP2000054068A
JP2001152278A
JP11335775A
Attorney, Agent or Firm:
椎名 彊