Study the influence of destabilization and tempering heat treatments on the microstructure of high chromium white cast iron by observing the resulted hardness and Abrasive wear conduct

Elkassas, Ahmed Abd Elhamid; Elkassas, Ahmed Mohamed; Hassan, Ragaie Mohamed

doi:10.21608/ejmtc.2023.167854.1234

Study the influence of destabilization and tempering heat treatments on the microstructure of high chromium white cast iron by observing the resulted hardness and Abrasive wear conduct

Document Type : Original Article

Authors

¹ Department of Production Engineer &amp; Mechanical Design - Faculty of Engineering - Tanta University, Tanta, Egypt

² Department of Production Engineer & Mechanical Design - Faculty of Engineering - Tanta University, Tanta, Egypt

³ Dept. of Mech. Design & Production - Faculty of Engineering - Cairo University, Cairo, Egypt

10.21608/ejmtc.2023.167854.1234

Abstract

Various destabilization heat treatments at 880°C, 980°C, 1080°C, and
1180°C for one hour followed by tempering at 500°C for two hours
were conducted on 2.55 wt.%-C, 21.8 wt.% Cr high chromium white
cast iron alloy. Investigations were done into how high chromium white
cast iron alloy's microstructure and mechanical characteristics were
modified by heat treatment. It has been observed that destabilization heat
treatment at temperatures of 880°C, 980°C, 1080°C, and 1180°C for 1
hour each, followed by tempering at 500°C for 2 hours, has an impact on
the combination of abrasion wear resistance and hardness. The obtained
hardness values are the result of the mixture of the martensite formed,
stoichiometry and morphology of the secondary carbides present mainly
M7C3. The optimum hardness values and abrasion wear resistance were
for destabilization heat treatment at 980 °C. The secondary carbides
were severely dissolved at 1180 °C, and as a result, the austenitic phase
was stabilized. The relationship between microstructural characteristics
and combinations of hardness and abrasion wear has been detailed

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