Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Hardness Evaluation of Spot Welding Using Instrumented Indentation Technique

계장화 압입시험법을 이용한 점용접부의 경도평가

  • Jin, Ji-Won (School of Mechanical Engineering, College of Engineering, Kunsan Nat'l Univ.) ;
  • Kwak, Sung-Jong (School of Mechanical Engineering, College of Engineering, Kunsan Nat'l Univ.) ;
  • Yoo, Dong-Ok (Production Technology Center, Frame Engineering Group, IS Tech.) ;
  • Kim, Tae-Seong (Production Engineering Center, CAE Technology Group, LS Cable Ltd.) ;
  • Kang, Ki-Weon (School of Mechanical Engineering, College of Engineering, Kunsan Nat'l Univ.)
  • Received : 2012.04.20
  • Accepted : 2012.06.22
  • Published : 2012.09.01
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Abstract

This study deals with hardness evaluation for spot welding by using an instrumented indentation technique to improve the quality of the inspection methodology. First, an instrumented indentation test and a Rockwell hardness test were performed for normal and abnormal spot welding. The hardness to indentation force-displacement curve obtained using each of the tests was compared. Furthermore, an analysis was conducted using the hardness obtained by the instrumented indentation technique. A quality control standard based on reliability was this evaluated for spot welding.

본 논문에서는 품질 검사 방법론이 적용된 계장화 압입시험을 수행하여 점용접부의 경도를 평가하였다. 먼저 정상 및 불량 용접조건하에서 제작된 점용접 샘플에 대해 로크웰 경도 및 계장화 압입시험을 실시하였다. 계장화 압입시험을 통해 구한 압입하중-변위선도를 이용하여 계산된 경도를, 동일한 조건의 동일위치에 대한 압입경도시험을 통하여 측정된 로크웰 경도와 확률론적 방법론을 이용하여 비교평가 하였다. 또한 계장화 압입시험을 통하여 추정한 경도 및 이에 대한 확률론적 해석을 수행하여 점용접부의 신뢰성 기반 품질 관리 기준 설정 가능성을 평가하였다.

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