Modern economical agricultural methods require the provision of agricultural machinery that is reliable and has a long service life when needed. Ductile iron castings widely used throughout the agricultural industry include various tractor parts, birch, brackets, clamps and pulleys. The typical component is the rear axle housing of the agricultural vehicle, which originally used cast steel. Road paving and construction industries require a considerable amount of various types of equipment including bulldozers, driving machines, cranes and compressors. Ductile iron castings are used in these areas.
Ball mill cast iron applications include injection moulds, forging machine cylinders and pistons. Nodular cast iron has high tensile strength and yield strength, good machining performance, allowing the production of lighter castings while maintaining rigidity. Similarly, the strength and toughness of ductile iron make it an ideal material for various hand tools, such as wrenches, clamps and measuring tools.
If you want to know more about the use of ball milled iron castings, please pay attention to us.
Pay attention to the smelting problems in the production of ball milled cast iron
Ball-milled cast iron needs to be smelted during production. What are the specific issues that need to be paid attention to when smelting, and how do we do it? Let me give you a detailed introduction.
1: The power of the electric furnace is adjusted to the maximum for the melting of the electric power. Because the smelting loss of Cr is relatively large, the ferrochrome should be added in the final, usually after the scrap steel is fully melted, it will participate in the red-roasted ferrochrome.
2: The lining can be acid or alkaline. The proportioning, knotting, drying and sintering of the lining are all carried out in accordance with conventional processes.
3: The ball milled cast iron pipe is poured and melted in an intermediate frequency induction furnace. The temperature does not need to be too high. It can be out of the furnace when the temperature reaches 1480℃. The molten iron should stay in the ladle for a period of time to cool down. Depending on the size of the workpiece, it can be between 1380～1410℃ Pouring.
4: The charging is generally carried out in the normal order. Firstly, refractory iron alloys such as gray pig iron and ferromolybdenum are loaded into the bottom of the furnace, and then the scrap steel is loaded according to the rule of tightness and looseness.
5: Deoxidation After the metal charge is fully melted and the temperature is raised to 1480℃, it will then participate in ferromanganese, ferrosilicon and aluminum for deoxidation.
6: The melting temperature of high-chromium cast iron is higher than that of ordinary cast iron, about 1200℃, and the temperature of the furnace is about 1500℃. Medium frequency induction electric furnace is used for smelting.