Title:
AUSTENITE STEEL HAVING EXCELLENT HIGH-TEMPERATURE STRENGTH
Document Type and Number:
WIPO Patent Application WO/2019/022460
Kind Code:
A1
Abstract:
The present invention relates to a material capable of realizing high-temperature physical properties equal to or higher than existing heat-resistant stainless steel while replacing nickel, which is a high-priced alloy element and contained in large quantities in a heat-resistant stainless steel used at a very high temperature, such as for a turbocharger, with a low-priced alloy element. An austenite steel according to the present invention contains 0.35-0.5 wt% of carbon (C), 1.0-2.0 wt% of silicon (Si), 6.0-9.0 wt% of manganese (Mn), 13.5-15.5 wt% of nickel (Ni), 23-26 wt% of chromium (Cr), 1.5-4.5 wt% of molybdenum (Mo), and the balance iron (Fe) and inevitable impurities, wherein the ratio of Manganese (Mn) content to nickel (Ni) content, CMn/CNi, in the alloy elements is maintained in a range of 0.4-0.65.
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Inventors:
YOO JI-SUNG (KR)
LEE SUNG-HAK (KR)
KIM GI-YONG (KR)
KIM HYEUNG-JUN (KR)
LEE SUNG-HAK (KR)
KIM GI-YONG (KR)
KIM HYEUNG-JUN (KR)
Application Number:
PCT/KR2018/008322
Publication Date:
January 31, 2019
Filing Date:
July 24, 2018
Export Citation:
Assignee:
POSTECH ACAD IND FOUND (KR)
KEYYANG PREC CO LTD (KR)
KEYYANG PREC CO LTD (KR)
International Classes:
C22C38/58; C22C38/44
Foreign References:
| US20170088910A1 | 2017-03-30 | |||
| JP2010280950A | 2010-12-16 | |||
| JP2014208875A | 2014-11-06 | |||
| KR20170036833A | 2017-04-03 | |||
| JPH0770700A | 1995-03-14 |
Other References:
JUNG: "Effects of Mn and Mo addition on high-temperature tensile properties in high-Ni-containing austenitic cast steels used for turbo- charger application", MATERIALS SCIENCE & ENGINEERING A, vol. 682, 9 November 2016 (2016-11-09), pages 147 - 155, XP055680063
JUNG SEUNGMUN ET AL : "Replacement of Ni by Mn in High-Ni-Containing Austenitic Cast Steels used for Turbo-Charger Application", METALLURGICAL AND MATERIALS TRANSACTIONS A, vol. 48, no. 2, 28 November 2016 (2016-11-28), pages 568 - 574, XP036131890, ISSN: 1073-5623, DOI: 10.1007/s11661-016-3878-8
JUNG SEUNGMUN ET AL : "Replacement of Ni by Mn in High-Ni-Containing Austenitic Cast Steels used for Turbo-Charger Application", METALLURGICAL AND MATERIALS TRANSACTIONS A, vol. 48, no. 2, 28 November 2016 (2016-11-28), pages 568 - 574, XP036131890, ISSN: 1073-5623, DOI: 10.1007/s11661-016-3878-8
Attorney, Agent or Firm:
IAM PATENT FIRM (KR)
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