The organization is dependent only on the chemical composition and cooling rate and is assured by the following major technical measures.
2.1 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 […]
1.1 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 […]
Ning 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 […]
Although high chromium cast iron has good hardenability, high chromium cast iron contains a large amount of chromium, making its thermal conductivity worse. When the cooling rate is high, the steep thermal gradient is easily produced in the casting. Then at different parts of the casting, the phase transition occurs at different times. Also, the […]
Abstract: High Chromium cast iron is a kind of excellent wear-resistant material; it not only has good wear resistance but also has a specific camber and toughness; electric Power and other industries have been widely used and achieved significant economic benefits.
The tensile specimen (cast steel) is cut from the button spindle with the size as shown in Figure 5 and the thickness is 1mm.
HU Zhi-jun, ZHAO Xiao-peng, YANG Yi-tao (School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China) Abstract： The influences of normalizing and tempering temperature on mechanical properties and microstructure of low alloy wear-resistant cast steel were investigated by using a vacuum arc furnace in lab situations. The results show that normalizing can refine the […]
The hardness of the tested sample after heat treatment at medium temperature (740 ~ 820 °c) is shown in Table 3. The corresponding metallograph is shown in Fig. 2. It can be seen that the hardness of hypoeutectic high chromium cast iron after heat treatment at medium temperature has significant change compared with the as-cast […]
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