분말야금법으로 제조한 하모닉 구조재료의 신장플랜지 가공성

윤재익; 이학현; 박형근; Kei Ameyama; 김형섭

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자료유형: 학술저널

저자정보: 윤재익 이학현 박형근 Kei Ameyama 김형섭

저널정보: 한국분말야금학회 한국분말야금학회지 한국분말야금학회지 제24권 제2호

발행연도: 2017.1

수록면: 128 - 132 (5page)

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초록· 키워드

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Harmonic structure materials are materials with a core–shell structure having a shell with a small grain size and a core with a relatively large grain size. They are in the spotlight because their mechanical properties reportedly feature strength similar to that of a sintered powder with a fine grain size and elongation similar to that of a sintered powder with a coarse grain size at the same time. In this study, the tensile properties, microstructure, and stretchflangeability of harmonic structure SUS304L made using powder metallurgy are investigated to check its suitability for automotive applications. The harmonic powders are made by mechanical milling and sintered using a spark plasma sintering method at 1173 K and a pressure of 50 MPa in a cylindrical die. The sintered powders of SUS304L having harmonic structure (harmonic SUS304L) exhibit excellent tensile properties compared with sintered powders of SUS304L having homogeneous microstructure. In addition, the harmonic SUS304L has excellent stretch-flangeability compared with commercial advanced high-strength steels (AHSSs) at a similar strength grade. Thus, the harmonic SUS304L is more suitable for automotive applications than conventional AHSSs because it exhibits both excellent tensile properties and stretch-flangeability.

#Hole expansion ratio #Harmonic structure #Mechanical properties #Advanced high strength steels #Stainless steel

참고문헌 (20)

참고문헌 신청

O. Kwon / 2010 / Mater. Sci. Forum 638:136

R. Kuziak / 2008 / Arch. Civ. Mech. Eng. 8:103

A. Mayyas / 2012 / Renew. Sustainable Energy Rev. 16:1845

M. Ma / 2011 / Lightweight Car Body and Application of High Strength Steels / Springer :187

N. Fonstein / 2015 / Advanced High Strength Sheet Steels: Physical Metallurgy, Design, Processing, and Properties / Springer :5

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