Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (33권5호 329-338)

Effect of process parameter and post heat treatment on the properties of aluminium bronze arc spray coating

알루미늄청동 아크 용사층의 성질에 미치는 용사 공정변수 및 후열처리 영향

김태호;박영구;윤정모;송요승;

전북대학교 신소재공학부, 신소재 개발 연구소;한국항공대학교 항공재료공학과;

Abstract

In this study, as an effort to improve the brittlement of coating layer, aluminum bronze coatings formed on steel substrates by arc jet spray process were subjected to post heat treatment. After each treatment, mechanical properties such as hardness, and UTS, and microstructural characterization of the specimens were investigated. The results showed that the hardness in the coatings slightly decreased with increasing heat treatment tine and temperature. The UTS of as-sprayed coatings was 4.31kgf/$ extrm{mm}^2$ and slightly increased to 5.51kgf/$ extrm{mm}^2$ after heat treatment at $900^{circ}C$ for 120min. On the other hand, the interdiffusion of copper and aluminum particles after heat treatment lead to decrease of the porosity density and increase the bond strength.

Keywords

Arc jet coating, Aluminium bronze;Porosity;Thermal spray;Heat treatment;Surface hardening;