Mechanical Properties and Temperature distributionofHard Facingof SS-304 steelby using SAW

Abstract

Surface engineering is a multidiscipline activity aimed at tailoring the properties or surfaces of engineering materials to improve their function or service life. Mostly; as applied to metals, surface engineering includes processes; such as plating, diffusion treatment, physical and chemical vapor deposition, ion implantation, thermal spray coatings, selective hardening, hard facing, and a variety of less-used and proprietary processes. However; these processes will be described briefly and it will be shown that each process has a niche; where it works better or is more cost effective than competing surface engineering treatments or bulk materials. Moreover the surface engineering’s carboride hard facing resist severe abrasion in combination with excellent corrosion resistance, adhesive wear resistance, erosion resistance, and high temperature resistance up to 1100° Fahrenheit. The deposit contains 60 %, 10-18 mesh Tungsten Carbide-Cobalt chips in Nickel-Chrome-Silicon-Boron matrix with hardness of Rc 35-40. However; these self-fluxing matrix alloys contain Boron; which provides for high bond strengths between the Wc particles and the matrix eliminating wear caused by the release of the hard Wc particles upon impact or gouging forces. The composite provides for ease of weldability. Moreover; submerged arc welding is the mostly preferred for hard facing and surface engineering; due to its excellent deposition rate and weldability. The various consumables of submerged arc welding process are like; electrode, flux, base metal and hard facing alloys etc.Furthermore; present study is carried out on hard faced surfaces of SS-304 steel for observing the effects of SAW process parameters on the mechanical properties of hard faced surface weld by submerged arc welding.The mechanical properties like; hardness, toughness of hard facing surface deposited base metal was noted.