New automatic gating system control method: 1) The intermediate frequency holding furnace is tilting to obtain the Tundish’s total weight, and the molten metal poured into the Tundish. The Tundish is connected between the mold for processing the casting molding on the automatic pouring production line and the gating system of the intermediate frequency holding […]
Abstract: The company’s original metal mold casting balls molding line using 1.2tons of medium-frequency induction furnace, the adoption of manual hydraulic control pouring to metal mold, often cast off, pouring dissatisfaction, overflow mold situation, based on the analysis of the pouring situation, the quantitative pouring was realized by controlling the pouring speed in stages, and […]
By improving the casting process, as shown in Fig. 3, the temperature field in the solidification process of the cast ball is changed to eliminate the defects. The improvement scheme is as follows: raising the riser, the diameter is 67.94 mm, the height is 30 mm, and the feeding capacity of the casting is increased […]
Liang Bing—Li Ye Gen (Mechanical and Electrical RepairFactory，Jinduicheng Molybdenum Group Co., Ltd, Huaxian714102, Shaanxi, China) Abstract：The solidification process of the wear-resistant cast baIls made by metal mold was simulated using the software of temperature field numerical simulation. Based on the study of the cast ball solidification process’s temperature distribution law by improving the casting process, […]
Abstract: To solve the problem of the blowhole defects in the center and on the high chromium cast iron grinding ball’s surface, the influence of the two filling modes—one-ball mold and four-ball mold on blowhole defects were analyzed. The result indicated that the four-ball m old’s venting effect with parting—line gating system is better. The impact […]
According to the hardness value and the impact toughness data, the hardness trend charts are drawn: 1; the impact toughness trend Charts as follows: Fig. 2.
Abstract：The effects of chemical composition and heat treatment on properties of the wear-resistant grinding balls were studied through hardness and impelling strength test, metallographic structure analysis. The study used an orthogonal test instead of a fixed variable method for a shorter experimental cost and time. The experimental results show that the wear-resistant grinding balls show […]
3.1 Matrix structure (1) Carbide and Martensite The microstructure of the chromium grinding balls are mainly carbide, and the carbide of high hardness in white cast iron is Fe3C, Cr3C, (Fe, CR)3C, Cr7C3, Cr22C6, WC, TiC, etc. , therefore, the size, number, distribution, shape of the grinding ball has a direct impact on the performance.
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