Tribology of a Fe–Cr–B-Based Alloy Coating Fabricated by a Controlled Short-Circuit MIG Welding Process

Abstract

The aim of this study was to study the microstructure and tribology of a Fe-Cr-B-based alloy coating deposited by a controlled short-circuit metal inert gas welding process onto a 1020 carbon steel substrate with varying input energies. Microstructure analysis showed that the as-deposited alloy consisted of (Cr,Fe) 2 B particles embedded in a BCC solid solution matrix composed of Fe, Cr, Mn, and Si. The hardness of (Cr,Fe) 2 B particles was 24 GPa. When the input energy increased during welding process, the deposition volume and dilution ratio were increased. As a result, (Cr,Fe) 2 B particle volume fraction decreased from 44.6 to 37.2% and the bulk hardness decreased from 6.43 to 5.80 GPa. Dry sliding wear tests were carried out against a stainless steel counterface. The steady state coefficient of friction and the wear rate for the Fe-Cr-B-based alloy were independent of input energy. While the coefficient of friction for the Fe-Cr-B-based alloy was about 20% higher than for the 1030 carbon steel, the wear rate was about 90% lower. The dominant sliding wear mechanisms were adhesion and oxidation. Two-body abrasion wear test using alumina abrasives showed that the wear rate of the Fe-Cr-B-based alloy increased as the input energy increased and was about 90% lower than that of the 1030 carbon steel. The abrasive wear mechanism was microcutting.

Krom içeriğinin Fe(18-x)CrxB2 (X=3,4,5) sert dolgu elektrotunda mikroyapı, aşınma ve korozyon davranışı üzerindeki etkisi

“…AISI 1010 altlık malzemenin Rockwell B skalasında ölçülen sertlik değeri 63 HRB'dir. Bu sonuçların literatürde yapılan benzer sonuçlar ile uyum içerisinde olduğu tespit edilmiştir [32,[34][35][36]. Gerçekleştirilen Fe-Cr-B esaslı sert yüzey alaşımlama işlemi ile malzemelerin yüzey sertlik değerleri büyük oranda arttığı söylenebilir.…”

Microstructure and properties of modified Al-bearing high boron high-speed steel

“…Fe-Cr-B wear-resistant alloys have received extensive attention from material scientists all over the world [1][2][3]. Many investigations have found that the Fe-Cr-B alloy has high hardness, good wear resistance, excellent oxidation and corrosion resistance [4,5]. However, the Fe-Cr-B wear-resistance alloy has poor hardness and wear resistance at high temperature, which makes it difficult to satisfy the requirements of the rolling industry for the manufacture of rolls [6,7].…”

Surface modification of Q550 HSLA steel with Co–Fe–Cr composite coatings manufactured by fibre laser cladding

“…[13][14][15] Among the past decades, researchers have manufactured Co-based coatings on the surface of steels utilising surface welding technologies such as TIG, MIG and MAG welding. [16][17][18] Coatings made by surface welding could achieve good properties and also have the advantage of low cost. However, the cladding materials were usually wire or electrodes in which the ceramic particles could not be added.…”