Residual Copper Effects on Resistance Spot Welded Low Carbon Steel
低炭素鋼の抵抗スポット溶接における残留銅の影響 (AI 翻訳)
American Welding Society, Henry Geerlings, ANNA STAERZ, AMY CLARKE, Kester Clarke, JONAH KLEMM-TOOLE, MOHAN SUBRAMANIAN, Grant Thomas
🤖 gxceed AI 要約
日本語
本研究では、スクラップ由来の銅含有量増加（最大0.26wt-%）が低炭素自動車用鋼板のミクロ組織と抵抗スポット溶接挙動に及ぼす影響を調査した。銅含有量の増加により母材強度と電気抵抗率が上昇し、溶接時のエクスパルション発生率が高まった。しかし、高銅合金の溶接継手は高強度を示し、適切な条件調整により銅の悪影響を許容できることが分かった。
English
This study investigates the effect of increased copper content (up to 0.26 wt-%) from scrap on the microstructure and resistance spot welding behavior of low-carbon automotive steel. Higher copper increases base-metal strength and electrical resistivity, leading to more expulsion during welding. However, welded joints exhibit higher strength, indicating that elevated copper can be accommodated with adjusted processing parameters.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の鉄鋼業界はCO2削減のためスクラップ利用率向上を進めており、本研究成果は自動車用鋼板のリサイクル材適用拡大に貢献する。特に、SSBJが求めるサプライチェーン排出量算定において、材料調達の品質管理に示唆を与える。
In the global GX context
As global steelmakers pursue circular economy goals, this paper provides practical insights into managing residual copper in recycled automotive steel. The findings support the ISSB's emphasis on supply-chain resilience and material efficiency in transition planning.
👥 読者別の含意
🔬研究者:This paper offers empirical data on copper effects on welding and mechanical properties, useful for modeling recycled steel performance.
🏢実務担当者:Automotive steel procurers and welding engineers can use these results to adjust processes for scrap-containing steel grades.
📄 Abstract（原文）
The use of scrap for steel making has increased worldwide and is expected to continue as steelmakers and users pursue sustainability efforts. Advances in steelmaking practices have enabled greater scrap recyclability and energy savings, but have come at the cost of reduced control over residual elements such as copper. This work studies the effect of increased copper content, up to 0.26 wt-%, on the base-metal microstructure and resistance spot-welding behavior of a low-carbon automotive sheet steel. Alloys were subcritically annealed prior to spot welding, tensile-shear testing, electrical resistivity measurements, and microstructural analysis. The higher-copper alloys showed increased base-metal strength, likely due to copper solid-solution strengthening. The higher-copper content alloys also exhibited higher electrical resistivity, resulting in a greater incidence of expulsion during resistance spot welding. Despite increased expulsion at high welding currents, resistance spot welds of the higher copper content alloys showed higher strength and lower ductility in tensile-shear testing. This work shows that elevated residual copper content can be accommodated in welded automotive steel sheets, provided base metal processing and welding parameters are adjusted to account for its influence.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.29391/2026.105.013first seen 2026-06-29 05:16:04 · last seen 2026-06-29 05:16:09
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