(4) Properties of cr25 high chromium cast iron ball grinding products Metallographic structure: The metallographic structure of CR25 high chromium cast iron grinding ball is tempering, eutectic carbide (Ke) and primary carbon, carbide (K1) are homogeneously embedded in the matrix of fire Martensitic (m), and the particles, grains, second and Secondary Carbides (K2) are uniformly […]
Cr25 high chromium cast iron grinding ball, the research is, by the customer China, Electrical Machinery, head office orders, according to, the United States FW proposed, high chromium, grinding ball, technology, conditions, see table 1
Sun Tingxiang, Li Maohua, China Building Materials Equipment Corporation (100831) High chromium cast iron grinding ball is widely used in building materials, metallurgy, mining, electric power, and other industries. After 20 years of development, we have basically finished grinding ball, more salary for material and some products have been able to earn 1:3 foreign exchange. […]
Heat treatment process: It is difficult to quench the wear resistant cast ball, mainly because the quenching requires martensite, and the cooling rate must be higher than the critical cooling rate (VK). During quenching, how can martensite be obtained and the effect of stress reduced? This is a major problem in the quenching process. To […]
Dang Jun-peng (Aluminium corporation of China zhongzhou branch, Jiaozuo 454174, China) Abstract： High chromium cast iron is considered to be the best of the anti-wear properties and has a good toughness of the material, So in this cast iron abroad used widely. For years the ball from high chromium cast in the research and production […]
The die core parameters and a sprue of the optimized process are shown in figures 8 and 9. The variation of the parameters of the ball casting’s specific position and the yield rate of the ball casting before and after the scheme is shown in Table 1. It can be seen from Table 1 that […]
The software is used to calculate the temperature field of the casting solidification process. Finally, the result of the temperature field is displayed by the post-processing module. The casting temperature during solidification 240s, 780s, 840s, and 900s is selected, as shown in Fig. 6. The casting material is nodular graphite, the casting iron, the liquidus […]
Abstract: Based on the original process, the simulation software developed by Visual C++ development tool has been adopted to numerically simulate the solidification process of φ120 wear- resistant casting ball. By considering the numerical simulation results and theoretical analysis, in combination with actual production process optimization, the suitable process scheme has been finally obtained. The […]
Without heat treatment, the as-cast cast iron grinding ball’s microstructure is austenite + eutectic carbide, which is heated at lower quenching temperature (such as below 950 °c). After Air Cooling, the microstructure contains austenite, eutectic carbide, and martensite; there is also a large troostite (see Fig. 2A). At higher quenching temperature (above 980 °C), the […]
Abstract: The effects of heat treatment on the hardness, impact toughness, and casting high chrome grinding ball’s microstructure have been investigated. The results show that the hardness of the ball quenched at 980 ℃and then tempered at 400 ℃ is up to 60. 5 HRC; meanwhile, the impact toughness of that ball is 6. 8J/ […]