Mechanical Properties and Corrosion–Abrasion Wear Behavior of Low-Alloy MnSiCrB Cast Steels Containing Cu |
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Authors: | Kaishuang Luo and Bingzhe Bai |
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Affiliation: | (1) Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China;(2) Key Laboratory for Advanced Materials of Ministry of Education, Beijing, 100084, People’s Republic of China; |
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Abstract: | Two medium carbon low-alloy MnSiCrB cast steels containing different Cu contents (0.01 wt pct and 0.62 wt pct) were designed,
and the effect of Cu on the mechanical properties and corrosion–abrasion wear behavior of the cast steels was studied. The
results showed that the low-alloy MnSiCrB cast steels obtained excellent hardenability by a cheap alloying scheme. The microstructure
of the MnSiCrB cast steels after water quenching from 1123 K (850 °C) consists of lath martensite and retained austenite.
After tempering at 503 K (230 °C), carbides precipitated, and the hardness of the cast steels reached 51 to 52 HRC. The addition
of Cu was detrimental to the ductility and impact toughness but was beneficial to the wear resistance in a corrosion–abrasion
wear test. The MnSiCrB cast steel with Cu by the simple alloying scheme and heat treatment has the advantages of being high
performance, low cost, and environmentally friendly. It is a potential, advanced wear-resistant cast steel for corrosion–abrasion
wear conditions. |
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