이종판재의 점용접 조건과 조직 및 인장시험 특성에 관한 연구

• 영문명: A Study on the Metallography Examination and Tensile Test Characteristics of Spot Welding Condition and Dissimilar Metal Plates
• 발행기관: 한국산업기술융합학회(구. 산업기술교육훈련학회)
• 저자명: 박재정(Jai-Jung Park)
• 간행물 정보: 『산업기술연구논문지』산업기술교육훈련논문지 제17권 4호, 219~225쪽, 전체 7쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2012.12.30

영문 초록

A study of Metallography examination results indicate dendrite structure. It was known that after spot welding finer structures appear at the center and boundary nugget area than the parent metallic area. These grain refinements may be caused by the induced thermal stresses originated potential introduction. Subsequently, the hardness increases. The tear fracture at tensile tests appears on the edges of HAZ area where hardness is lower. The tearing fracture possesses the highest breaking strength among three modes so it is regarded the ideal fracture. Optimized spot welded SCP1 and STS304-2B posses tear fracture when tested. Those that satisfy nugget diameter and thickness within KS B 0850 standard show the best tensile strength tests at welding current 6.5kA, pressure to 300kgf. At thest conditions yield strength was 170MPa at 0.2% of the offset Proper welding conditions of dissimilar materials STS304-2B SCP1 are welding current of 6.5kA, pressure in the range of 250kgf ~ 350kgf. The optimum conditions for spot welding are welding current of 6.5kA and 300kgf pressure. The maximum tensile strength was 302MPa at these conditions.

목차

Ⅰ. 서 론

Ⅱ. 시험편 및 실험방법

Ⅲ. 실험결과 및 고찰

Ⅳ. 결 론

키워드

Metallographic Examinational(금속조직시험) Thermal Stresses(열응력) Spot Elding(점용접) Tensile Test(인장시험)