DP780 강철의 마찰 교반 점 용접을 통해 랩 조인트 생성

Overview

This article presents a protocol for friction stir spot welding (FSSW) on dual phase 780 steel. The process involves a high-speed rotating tool pin that generates heat through friction to soften the material, allowing the pin to plunge into two sheet joints to create a lap joint.

Key Study Components

Area of Science

• Materials Science
• Welding Technology
• Automotive Engineering

Background

• Increased weight reduction demands in the automotive industry.
• Growing interest in lap joints and advanced high-strength steels (AHSS).
• Challenges in process reliability for AHSS spot welding joints.
• Comparison of FSSW with resistance spot welding.

Purpose of Study

• To demonstrate the FSSW protocol on dual phase 780 steel.
• To highlight the benefits of FSSW over traditional welding methods.
• To provide a safe procedure for conducting FSSW.

Methods Used

• Utilization of a high-speed rotating tool pin.
• Plunging the pin into two sheet joints to create a lap joint.
• Safety measures including wearing goggles and gloves.
• Demonstration by graduate students Cheng Chia-Ping and Hsu Hao.

Main Results

• FSSW provides lower welding temperatures compared to resistance spot welding.
• Elimination of splash during the welding process.
• Increased stability in the manufacturing process.
• Successful demonstration of the FSSW procedure.

Conclusions

• FSSW is a viable alternative to traditional welding methods for AHSS.
• Demonstrated procedure enhances understanding of FSSW.
• Safety precautions are essential during the welding process.

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