Abstract
Advances in Surface Engineering Using TIG Processing to Incorporate Ceramic Particulates into Low Alloy and Microalloyed Steels – A Review
Highlights
This paper is an invited review of the work undertaken by the present authors and their colleagues listed in the references, using surface engineering to enhance the surface properties of low alloy and microalloyed steels through the addition of ceramic powders.The background to the present projects emanated from work on particulate metal matrix composities (MMC’s), which in the 1960’s, grew from the development of cermets, at that time a new generation of composite materials designed to have optimal properties, including high temperature resistance and the hardness of a ceramic combined with the ability to undergo plastic deformation like a metal
TiC particulates of 45–100 μm size were preplaced on a low alloy steel, and following tungsten inert gas (TIG) processing, the hardness increased from the as-received steel value of ~200 Hv to ~800 Hv, due to some dissolution and re-precipitation of TiC particulates
A surface engineering technique based on a tungsten inert gas (TIG) torch was used initially to study the influence of overlapping tracks on a low alloy (LA) steel (BM) with a composition of 0.43C-0.57Mn-0.30Si-0.04S-0.035P-1.15Cr2.57Ni-0.63Mo, bal.Fe incorporating 45100 μm, 99.5% purity TiC particulates
Summary
This paper is an invited review of the work undertaken by the present authors and their colleagues listed in the references, using surface engineering to enhance the surface properties of low alloy and microalloyed steels through the addition of ceramic powders.The background to the present projects emanated from work on particulate metal matrix composities (MMC’s), which in the 1960’s, grew from the development of cermets, at that time a new generation of composite materials designed to have optimal properties, including high temperature resistance and the hardness of a ceramic combined with the ability to undergo plastic deformation like a metal. Patel et al [26] using a microalloyed steel plate, substituted ~5 μm SiC for the TiC particulates, with the aim of dissolving the ceramic during processing, and precipitating new phases as a fine dispersion on cooling, as found for Al based MMC’s [8,9,10,11,12], Both Ar and Ar+He shielding gases with 420, 530 or 840 Jmm−1 TIG energy inputs were investigated.
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