ENGINEERING JOURNAL CHIANG MAI UNIVERSITY

Volume 26, No. 02, Month AUGUST, Year 2019, Pages 28 - 35

The study of wear behavior of hardfacing layer on 3.5% cr steel by flux cored wire arc welding process

Teerachod Treeparee and Prapas Muangjunburee

Abstract Download PDF

Hardfacing weld is a technique which mainly improves and extends the useful life of engineering components. The purpose of this research is to study wear behavior of hardfacing layers on 3.5% Chromium cast steel by Flux Cored Wire Arc Welding (FCAW) process. The automatic welding process and semiautomatic welding process with one and three layers was performed. Austenitic stainless steel and martensitic hardfacing wire were chosen to weld as the buffer and hardfacing layer respectively. These results showed that there is no defect in the Heat Affected Zone (HAZ) and other regions. Semiautomatic process showed higher abrasive wear resistance than automatic process due to more martensite content and higher hardness. Moreover, the abrasive wear resistance of three layers hardfacing was better than one layer hardfacing because one layer hardfacing was more diluted from buffer layer than three layers hardfacing. The best condition in this research is semiautomatic process with three layers hardfacing.

Keywords

3.5% Cr steel, Hardfacing, Abrasive wear, FCAW1.

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