Novel incubation-free spheroidizing agent

Abstract

The invention relates to the technical field of casting, in particular to a novel incubation-free spheroidizing agent which is prepared from 10-30% of Mg, 0-10% of Ca, 0-10% of Ba, 30-80% of Si, 0-10%of C, 0-5% of Al, 0-10% of functional elements and the balance Fe. The spheroidizing agent has the advantage that the cost is low, spheroidizing reaction is stable, spheroidizing quality is stable, the magnesium absorption rate is high, the nucleation incubation effect is achieved, pollution of light, smoke and the like on environment is small, quantity fixing is accurate and fast in the production process, operation is easy and convenient, the number of steps is small, and few matters needing attention exist; and humidity resistance is good, moisture absorption and deterioration are not likely to be caused in the storage period, and self subcutaneous blowholes can be avoided.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a novel inoculation-free nodularizing agent. Background technique [0002] Spheroidal graphite cast iron is obtained through spheroidization and inoculation treatment, which effectively improves the mechanical properties of cast iron, especially improves plasticity and toughness, thereby obtaining higher strength than carbon steel. Ductile cast iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. It is based on its excellent performance that it has been successfully used to cast some complex stress, strength, toughness, and wear resistance. Parts with high performance requirements. [0003] When the molten iron flows out, it is gray iron. It needs to add inoculants and nodulizers for nodular treatment to make it into ductile cast iron. The main function of the inoculant is to promote graphitization, reduce t...

AI Technical Summary

Problems solved by technology

And the use of "cored wire" to feed silk spheroidization and inoculation, the cored wire nodulizer is to coat magnesium powder and iron powder in thin steel plate or steel plate, and the cored wire inoculant is to mix ferrosilicon particles and other functional additives Coated in thin steel plate or steel plate, when spheroidizing, use the wire feeding machine to directly insert the "cored wire" into the original molten iron with adjusted composition in the spheroidizing bag for spheroidizing reaction. Inoculation process, the absorption rate of functional alloy can reach more than 90%, this kind of nodulizer is more expensive, and it needs to be used in conjunction with the use of inoculated cored wire, and the equipment investment is large, and the operation is very difficult, but the processing time The alloy has a high absorption rate, so the total cost of processing nodular cast iron is hardly increased, and has a high application and promotion value

[0005] Dust removal during spheroidization is a major problem that is difficult to solve at home and abroad. The smoke not only pollutes the environment, but also the harmful elements such as MgO and MgS discharged in the smoke directly damage the health of workers.

The spheroidizing ladle is driven by machinery, and the ladle is manually shaken to turn the molten iron into the fan-shaped ladle, which consumes a certain amount of mechanical spare parts and increases the labor intensity of the workers.

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