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Title:
ADDITIVELY MANUFACTURED ARTICLE, METHOD FOR MANUFACTURING SAME, AND METAL POWDER FOR ADDITIVE MANUFACTURING
Document Type and Number:
WIPO Patent Application WO/2019/124296
Kind Code:
A1
Abstract:
With regard to an additively manufactured article made of a maraging steel, provided are an additively manufactured article having excellent toughness, a method for manufacturing the additively manufactured article, and a metal powder for additive manufacturing. This additively manufactured article is made of a maraging steel containing 0.1-5.0 mass% of Ti, wherein, when the concentration distribution of Ti in a cross section parallel to the stacking direction of the additively manufactured article is surface analyzed, the length of a linear Ti-rich portion having a Ti concentration B of at least (1.5×A) with respect to the average Ti concentration A in the cross section is 15 μm or less. This method for manufacturing the additively manufactured article uses a metal powder made of a maraging steel containing 0.1-5.0 mass% of Ti, wherein the heat source output during additive manufacturing is set to 50-330 W and the scanning speed is set to 480-3000 mm/sec. This metal powder for additive manufacturing is made of a maraging steel containing 0.1-5.0 mass% of Ti, and has a median diameter D50 of 200 μm or less.

Inventors:
FUKUZAWA Norihide (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
SAKAMAKI Koichi (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
NAKANO Yousuke (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
KUWABARA Kousuke (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
FUKUMOTO Shiho (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
SAITO Kazuya (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
Application Number:
JP2018/046299
Publication Date:
June 27, 2019
Filing Date:
December 17, 2018
Export Citation:
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Assignee:
HITACHI METALS,LTD. (2-70, Konan 1-chome Minato-k, Tokyo 24, 〒1088224, JP)
International Classes:
B22F3/16; B22F3/105; B33Y80/00; C22C38/00; C21D9/00; C22C38/14
Domestic Patent References:
WO2011149101A12011-12-01
Foreign References:
JP2001279386A2001-10-10
JPH07243003A1995-09-19
JP2017128770A2017-07-27
JP2017025392A2017-02-02
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