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논문 기본 정보

자료유형
학술저널
저자정보
Gyuyeol Bae (POSCO) Joonoh Moon (Changwon National University) Bo-Young Jeong (POSCO)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第42卷 第5號
발행연도
2024.10
수록면
458 - 462 (5page)

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초록· 키워드

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Although the need for automobile lightening continues to increase in preparation for the era of electrical vehicles, the application of steel, which has strengths in price and recycling in the automotive industry, is expected to continue along with the developments of various driving energy sources. Recently, when lightening and stiffness reinforcement are required for the electric vehicles or medium and large SUVs, newly-designed parts using GIGASTEEL with a tensile strength of 980MPa or higher are being developed. However, it is difficult to secure sufficient weld strength and fatigue performances when applying welding consumables that have been applied normally and ultra-high strength welding materials that have been commercialized so far. It has also limitations that are not easy to apply due to excessive manufacturing costs in the automotive industry. In this study, the application of commercial welding consumables by strength grade to GIGASTEEL was reviewed and the properties of the weldments were compared to address all of the above issues. Here, we consider the effects of C, Mn, Si, Cr, Ni, Mo and microalloying to implement interlocked nature with dense and complex microstructures of lath-like bainitic and acicular ferrite that can effectively improve both strength and toughness of GIGASTEEL welds in a more economical way.

목차

Abstract
1. Introduction
2. Experimental procedure
3. Results and discussion
4. Summary
References

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