WEAR CHARACTERSTICS OF CHROMIUM CARBIDE HARDFACED LAYER MADE BY PASTE TECHNIQUE USING E-7014 SMAW ELECTRODE

  Preetinder Singh,  Taljeet Singh,  Dilpreet Singh,  Avtar Singh

Hardfacing is a process of depositing the filler metal on to a compatible surface for the enhancement of wear properties. The process is called hardfacing because the deposited surfaces are harder than that of base metal. Hardfacing is one of the most useful and economical way to improve the wear performance of a component. Surface properties and quality achieved of the hardfaced component depends upon the selected hardfacing alloys and the welding process used for hardfacing. Shielded metal arc welding is most commonly used process for hardfacing due to its easy availability and versatility of operation. Low carbon steel is selected for the present work as substrate material due to its low cost, easy availability and variety of applications. In the present work a detailed study was done to study the effect of different compositions of chromium powder on mild steel, deposited by paste coating process. On coating weld metal of AWS E7014 SMAW electrode was deposited with SMAW Process. Three different compositions of metal powder chosen for hardfacing material. The investigation was done on three categories of samples prepared by these compositions. Various rigorous tests were carried out on the batch of three samples per category i.e. total nine samples. Wear test, micro-hardness test, dilution test were done to record the observations. Wear test was performed on dry wear and friction testing machine. It was observed that Cr 90% is the best composition in terms of deposit quality, hardness achieved, and wear rate among the three compositions in study. It was observed that with an increase in Cr content there is an increase in micro hardness values as well as the wear resistance is also improved. Best micro hardness was obtained at lower current. It was also found that dilution mainly depend upon heat input and chemical composition of base metal and electrode material. It was further observed that sample have higher Cr content possess fine grain.

Keywords- Hard facing, Paste coating, Wear, SMAW.

Unique Identification Number - IJEDR1702125
Page Number(s) - 744-756
Pubished in - Volume 5 | Issue 2 | April 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Preetinder Singh,  Taljeet Singh,  Dilpreet Singh,  Avtar Singh,   "WEAR CHARACTERSTICS OF CHROMIUM CARBIDE HARDFACED LAYER MADE BY PASTE TECHNIQUE USING E-7014 SMAW ELECTRODE", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 2, pp.744-756, April 2017, Available at :http://www.ijedr.org/papers/IJEDR1702125.pdf