경도에 따른 고강도 리벳의 전자기 리벳 접합 거동 연구

• Published in: 대한용접·접합학회지 Vol. 41; no. 3; pp. 156 - 160
• Main Authors: 윤병현(Byoung-Hyun Yoon), 심지연(Ji-Yeon Shim), 추동균(Dong-Gyun Choo)
• Format: Journal Article
• Language: Korean
• Published: 대한용접·접합학회 01.06.2023; 대한용접접합학회
• Subjects: 기계공학; Mechanical properties; Rivets; Multi-material joining; Hardness; High-strength steel
• ISSN: 2466-2232; 2466-2100

Recently, the application of aluminum based on ultra-high strength steel is expanding around high-end models of electric vehicles, so it is necessary to develop strategic welding/joining technologies for these materials. In the case of overseas advanced automobile companies, such development is being carried out at the level of introducing mass production facilities through the development of joining technology, but in Korea, the localization rate of original core technology and related equipment in the field of welding and joining is still very insufficient. Therefore, in this study, in order to develop a high-strength rivet suitable for the rivet process during the multi-material bonding process, cold forging steel was used to attain an appropriate level of hardness through changes in the microstructure through heat treatment. Rivets with different hardness were fabricated through heat treatment, and flaring and tensile test were conducted. As a result of flaring test of rivets, buckling occurred with hardness values of Hv 447 and 486, while cracks occurred without buckling in rivets with hardness values of Hv 506. But as a result of tensile shear test using GA980 and Al5052 materials, there was no significant difference in tensile shear load values according to hardness values of the rivets. KCI Citation Count: 0