18561363. AUTOMOTIVE MEMBER AND RESISTANCE SPOT WELDING METHOD THEREFOR simplified abstract (JFE STEEL CORPORATION)
Contents
AUTOMOTIVE MEMBER AND RESISTANCE SPOT WELDING METHOD THEREFOR
Organization Name
Inventor(s)
Katsutoshi Takashima of Tokyo (JP)
AUTOMOTIVE MEMBER AND RESISTANCE SPOT WELDING METHOD THEREFOR - A simplified explanation of the abstract
This abstract first appeared for US patent application 18561363 titled 'AUTOMOTIVE MEMBER AND RESISTANCE SPOT WELDING METHOD THEREFOR
Simplified Explanation: The patent application describes an automotive member created through resistance spot welding, specifically focusing on the microstructure near the weld nugget's edge.
- The automotive member is formed by resistance-spot-welding multiple steel sheets, including high-strength steel sheets.
- The high-strength steel sheet has a specific chemical composition.
- The microstructure near the edge of the weld nugget consists of a composite microstructure containing ferrite, martensite, and tempered martensite.
- The average number density of Nb-based and Ti-based precipitate grains is specified in the patent.
Key Features and Innovation:
- Composite microstructure near the edge of the weld nugget
- Specific chemical composition of high-strength steel sheet
- Average number density of precipitate grains in the microstructure
Potential Applications: This technology can be applied in the automotive industry for manufacturing high-strength automotive components.
Problems Solved: This technology addresses the need for strong and durable automotive components that can withstand various stresses and conditions.
Benefits:
- Enhanced strength and durability of automotive components
- Improved resistance to wear and tear
- Potential for lighter weight components
Commercial Applications: The technology can be utilized in the production of automotive bodies, chassis, and other structural components, potentially leading to more efficient and durable vehicles in the market.
Prior Art: Readers can explore prior research on resistance spot welding techniques, high-strength steel compositions, and microstructure analysis in automotive components.
Frequently Updated Research: Stay updated on advancements in resistance spot welding technology, high-strength steel materials, and microstructure analysis in automotive engineering.
Questions about Automotive Member and Resistance Spot Welding: 1. How does the composite microstructure near the edge of the weld nugget contribute to the overall strength of the automotive member? 2. What are the implications of using high-strength steel sheets with a specific chemical composition in resistance spot welding for automotive applications?
Original Abstract Submitted
An automotive member and a resistance spot welding method. The automotive member includes a resistance spot weld formed by resistance-spot-welding a plurality of steel sheets including at least one high strength steel sheet. The high strength steel sheet has a specific chemical composition. The microstructure in the vicinity of the edge of the nugget of the resistance spot weld is a composite microstructure containing ferrite at a volume fraction of 1 to 30%, martensite at a volume fraction of 1 to 50%, and tempered martensite at a volume fraction of 20% or more. The average number density of Nb-based precipitate grains having a grain diameter less than 0.09 μm and Ti-based precipitate grains having a grain diameter less than 0.09 μm is 10 or more grains per 100 μmin a sheet cross section.
