TUBULAR BODY USED IN HIGH TEMPERATURE ATMOSPHERE AND METHOD FOR FORMING METAL OXIDE LAYER ON INNER SURFACE OF TUBULAR BODY

WIPO Patent Application WO/2018/088070

A1

The present invention provides: a tubular body used in high temperature atmospheres; and a method for stably forming a metal oxide layer to have a high surface area on the inner surface of the tubular body. This tubular body used in high temperature atmospheres is made of a heat resistant alloy, which contains 15% or more of Cr and 18% or more of Ni in mass%, and has the inner surface of which the arithmetic average roughness (Sa) of the three-dimensional surface roughness satisfies 1.5≤Sa≤5.0, and the skewness (Ssk) of the surface height distribution satisfies |Ssk|≤0.30. Said heat resistant alloy may contain 2.0% or more of Al in mass%. The kurtosis (Sku) of the surface height distribution of the three-dimensional surface roughness of the inner surface may satisfy Sku≥2.5.

WO/2019/171157	A MANUFACTURING PROCESS OF PRESS HARDENED PARTS WITH HIGH PRODUCTIVITY
WO/2009/033882	METHOD FOR GENERATING AN OXIDE LAYER ON A METALLIC FOIL, FOIL HAVING AN OXIDE LAYER AND HONEYCOMB BODY PRODUCED IN THIS WAY
JP2808566	INDUSTRIAL APPLICABILITY: Method for manufacturing molten Zn-Al alloy plated hot-rolled steel strip

MATSUBARA MOTOYUKI (JP)
HASHIMOTO KUNIHIDE (JP)
YAMAGUCHI HIROSHI (JP)
TOMITA MASAYUKI (JP)

PCT/JP2017/036071

May 17, 2018

October 04, 2017

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KUBOTA KK (JP)

C23C8/14; B22D29/00; B23K35/30; C22C19/05; C22C38/00; C22C38/40; C22C38/60

WO2010113830A1

2010-10-07

JP2013198917A	2013-10-03
JP2014218728A	2014-11-20
JP2011204723A	2011-10-13

See also references of EP 3540088A4

MARUYAMA & CO. (JP)

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