Title:
CARBON-COATED STEEL MATERIAL AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/229112
Kind Code:
A1
Abstract:
The present invention relates to: a carbon-coated steel material having oxidation resistance, sour resistance, and hydrogen induced cracking resistance, which can be formed by using a process for the heat treatment of a steel material; and a method for manufacturing same. According to an embodiment of the present invention, provided is a method for manufacturing a carbon-coated steel material, comprising the steps of: heat-treating a steel material by heating at 870-950 °C; and forming a carbon coating layer on the surface of the steel material by injecting a carrier gas and acetylene gas in a flow rate ratio of 5:1-25:1 in the state in which the steel material is heated, wherein the carbon coating layer has an R value of 1 or less, the R value being defined by a ratio (=ID/IG) of a D band to a G band in a Raman spectrum.
Inventors:
PARK MIN HO (KR)
CHON SEUNG HWAN (KR)
LEE JAE HYUN (KR)
HYUN SANG HWA (KR)
CHON SEUNG HWAN (KR)
LEE JAE HYUN (KR)
HYUN SANG HWA (KR)
Application Number:
PCT/KR2022/015382
Publication Date:
November 30, 2023
Filing Date:
October 12, 2022
Export Citation:
Assignee:
HYUNDAI STEEL CO (KR)
International Classes:
C23C16/26; C21D8/02; C23C8/22; C23C16/02; C23C16/448; C23C16/56
Domestic Patent References:
| WO2018085988A1 | 2018-05-17 |
Foreign References:
| KR20210059052A | 2021-05-25 | |||
| KR20140077138A | 2014-06-23 | |||
| JP2015517034A | 2015-06-18 | |||
| JP2007119907A | 2007-05-17 |
Attorney, Agent or Firm:
LEE, In Haeng et al. (KR)
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