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Title:
TOOL MATERIAL MANUFACTURING METHOD AND TOOL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/156169
Kind Code:
A1
Abstract:
Provided is a method for efficiently improving other mechanical properties (bending stress, toughness, impact resistance, etc.) without significantly impairing the wear resistance and high-temperature softening resistance, etc. of a buildup layer formed by the laser cladding method. In addition, the present invention provides a tool material in which a buildup layer of high-speed tool steel having excellent bending stress, toughness, impact resistance, wear resistance, etc. is formed on the outermost surface of a relatively inexpensive metal substrate. This is achieved by providing a tool material manufacturing method comprising: a laser cladding step of supplying high-speed tool steel powder to the surface of a metal base while irradiating with a laser beam, a spheroidizing annealing step of heat treating the buildup layer at 750°C-880°C, a quenching step of quenching the buildup layer subjected to the spheroidizing annealing step, and a tempering step of tempering the buildup layer subjected to the quenching step.

Inventors:
ISHIKAWA TAKESHI (JP)
SATUTA TOSHITAKA (JP)
TAKAHASHI KAZUHITO (JP)
YOKOTA TOMOHIRO (JP)
YOSHIDA KENTARO (JP)
NAKAMURA NORIO (JP)
MOTOIZUMI YU (JP)
Application Number:
PCT/JP2019/004423
Publication Date:
August 15, 2019
Filing Date:
February 07, 2019
Export Citation:
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Assignee:
SUMITOMO HEAVY IND HIMATEX CO LTD (JP)
KANAGAWA INSTITUTE OF INDUSTRIAL SCIENCE AND TECH (JP)
International Classes:
C21D9/38; B23K26/342; B23P15/28
Domestic Patent References:
WO2016208571A12016-12-29
Foreign References:
JP2016155155A2016-09-01
JPH07204907A1995-08-08
JPH06240418A1994-08-30
JP2001294935A2001-10-26
JPS60141397A1985-07-26
EP3006124A12016-04-13
Other References:
FURUYA, TADASHI: "Tool steel, Special steel", SPECIAL STEEL ASSOCIATION OF JAPAN, vol. 65, no. 5, 1 September 2016 (2016-09-01), pages 30 - 33
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN YUKON (JP)
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