Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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A Study on the Mechanical Properties of Butt Welding Zone of Clad Steel According to the Process Design

공정 디자인에 따른 클래드강 맞대기 용접부의 기계적 특성에 관한 연구

  • 이정현 (볼보 자동차(스웨덴)) ;
  • 박재원 (서울과학기술대학교 NID 융합기술 대학원 나노IT융합 프로그램)
  • Received : 2012.03.23
  • Accepted : 2012.04.20
  • Published : 2012.08.15
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Abstract

In this study, some considerations have been suggested in developing on-site techniques to evaluate the sensitization of stainless steels. Electrochemical potentiokinetic reactivation (EPR) technique is known to be a candidate tool for field applications since it enables quantitative assessment in reasonable test time, compared to oxalic etching (ditch) technique. The on-site application of the test method imposes additional restrictions on the selection of the test method (for example, minimum surface preparation requirement, insensitivity to testing temperature, etc.). The EPR and etching techniques have been compared in order to sensitization of stainless steel structures. It has been widely reported that the maximum sensitivity in the welded structure of stainless steel is shown at heat-affected zone (HAZ) than weldments with cast structure. In this work, sectioned weldments and external surfaces were investigated to reveal the degree of sensitization by the etching and the results were compared with those of EPR test. The EPR test showed little sensitivity to surface roughness and test temperature.

Keywords

References

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