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MICROSTRUCTURE AND ABRASIVE WEAR PROPERTIES OF HI-C MEDIUM CHROMIUM WEAR RESISTANT ALLOY STEELS AFTER HEAT TREATMENT （3）
/0 Comments/in Castings /by Sara Wu2.1 Heat-treated structure Fig. 3 is a metallographic picture of each alloy steel (1.1% C) as-cast and corroded by 4% nitric alcohol after being annealed at 1000 °C, quenched at 980 °C, and tempered at 220 °C. As-cast, it has a large dendrite and a large amount of Carbide. XRD analysis (Fig. 4) shows that […]
Microstructure and abrasive wear properties of Hi-C medium chromium wear resistant alloy steels after heat treatment (2)
/0 Comments/in Castings /by Sara Wu1.1 Heat treatment process Five quenching temperatures were designed: 860 ° C, 900 ° C, 940 ° C, 980 ° C, 1020 ° C, according to the phase composition calculation of wear-resistant alloy steel at different temperatures by JmatPro and the phase diagram analysis of Fe-C-Cr ternary alloy in longitudinal section. The heat treatment process […]
Microstructure and abrasive wear properties of Hi-C medium chromium wear resistant alloy steels after heat treatment （1）
/0 Comments/in Castings, Heat Treatment Process /by Sara WuNing Jiapei, Zheng Kaihong, Zhou Hongming, Wang Haiyan, Long Jun) (1. School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;2.Guangdong Institute of Materials and Processing, Guangzhou 510651, China) Abstract: The effect of quenching temperature on microstructure and mechanical properties of medium chromium wear resistant alloy steel was studied. The mechanical properties […]
Failure analysis of 90mm low chromium cast ball cracking (3)
/0 Comments/in Grinding media balls /by Sara Wu2.4 Low-magnification analysis In order to further analyze the material quality of the dia90 mm low chromium cast grinding ball, the sample was taken at the fracture position parallel to and close to fracturing by electric spark cutting method. The sample was polished by grinding wheel and heated to about 70 °C in 50% hydrochloric […]
Failure analysis of 90mm low chromium casting ball cracking (2)
/0 Comments/in Grinding media balls /by Sara Wu2.3 Metallographic test With the hardness mentioned above test samples, the metallographic samples were prepared near the fracture point, polished and polished without erosion at 100-fold optical. Non-metallic inclusions were detected under the microscope. The results are shown in Table 2 and Figure 2.