Title:
METHOD FOR REINFORCING DIE, AND REINFORCED DIE
Document Type and Number:
Japanese Patent JP2016060939
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve the problem that the surface layer of a die is peeled by a long term use even when the surface of the die is reinforced and the life of the die is short.SOLUTION: The method for reinforcing a die comprises: irradiating a die material of high-speed tool steel for hot dies including matrix high-speed tool steel, alloy tool steel for hot dies or stainless steel as a body to be irradiated with a large area electron beam to obtain a smooth surface modification layer having a thickness of 2 μm or more and 5 μm or less and formed by the elution of an inclusion; forming a sulfurized film layer having a thickness of 1 μm to the die material and including a comparatively large amount of a sulfuric compound of the inclusion; and performing sulfonitriding processing so as to form a nitrogen and sulfur diffusion layer adjacent to the sulfurized film layer.SELECTED DRAWING: Figure 1
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Inventors:
INOUE MOTOHIRO
Application Number:
JP2014189261A
Publication Date:
April 25, 2016
Filing Date:
September 17, 2014
Export Citation:
Assignee:
SODICK CO LTD
International Classes:
C23C8/28; B23K15/00; C23C8/02; C23C8/52; C23C8/72
Domestic Patent References:
| JP2003013198A | 2003-01-15 | |||
| JP2004114151A | 2004-04-15 | |||
| JP2008138223A | 2008-06-19 | |||
| JP2003013198A | 2003-01-15 | |||
| JP2004114151A | 2004-04-15 | |||
| JP2008138223A | 2008-06-19 |