Wear Behavior of Plasma Transferred Arc Deposited Layers for Ni - and Co - base Alloy

Ni계 및 Co계 합금 PTA 오버레이용접층의 마모거동에 관한 연구

  • 윤병현 (포항산업과학연구원 설비/용접연구팀) ;
  • 이창희 (한양대학교 재료공학부) ;
  • 김형준 (포항산업과학연구원 설비/용접연구팀)
  • Published : 2001.10.01

Abstract

This study has evaluated the wear behavior of PTA (Plasma Transferred Arc) Inconel 625 and Stellite 6 overlays on Nimonic 80A substrate. Nimonic 80A alloy was also included for comparison. In order to evaluate the wear performance, three-body abrasive wear test and pin-on-disk dry sliding wear test were performed. Microstructural development during the solidification of deposits is also discussed. Wear test results show that the wear rate of Stellite 6 deposit is lower than that of Inconel 625 deposit and Nimonic 80A. The sliding wear resistance of overlay deposits follows a similar trend to the abrasive wear resistance, but for Nimonic 80A. The main wear mechanisms were abrasive wear for Inconel 625 deposit, adhesive wear and delamination for Stellite 6 deposit in pin-on-disk dry sliding wear test and ploughing in three-body abrasive wear test. Cross sectional examinations of the worn surface of pin specimens after pin-on-disk dry sliding wear test implies that the plastic deformation near worn surface has occurred during the wear testing.

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