Low Carbon Ferrochrome For Foundry

Name: China Low Carbon Ferrochrome For Foundry Suppliers Manufacturers Factory
Brand: ZhenAn
SKU: 212883889

Particle size: customized according to customer requirements. Packing: customized according to customer requirements

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Products Description

In addition, with the increase of chromium content, the morphology and distribution of carbides are improved, which increases the impact toughness, hardness, fatigue resistance and impact wear resistance. Figure 4 shows the effect of chromium on the properties of low chromium cast iron.

Due to the existence of a large number of carbides in the structure, the toughness of low-chromium cast iron is equivalent to that of ordinary white cast iron, but the wear resistance against abrasive wear is greatly improved. Therefore, low chromium cast iron is mainly used in ball mill grinding balls.

Low-chromium cast iron generally adopts as-cast stress relief treatment, and its matrix structure is pearlite, that is, the as-cast castings are kept at medium and low temperatures for an appropriate time to reduce stress. In order to further improve the hardness of low-chromium cast iron, it is also possible to carry out high-temperature heat preservation for a certain period of time, air cooling and low-temperature tempering to obtain a certain amount of martensitic matrix structure. At this time, a certain amount of Mo and Cu can be added to improve hardenability. Or elements such as Ni.

Low Carbon Ferrochrome For Foundry

Low chromium cast iron can be smelted not only in cupola furnace, but also in electric furnace, and can also be smelted in double connection of cupola furnace and electric furnace. However, care should be taken to control the carbon content of molten iron when melting in a cupola furnace. Usually, low-chromium cast iron molten iron is inoculated with rare earth ferrosilicon in front of the furnace to improve the comprehensive performance. Rare earth elements can improve the morphology of carbides, refine grains, deoxidize, desulfurize and purify molten iron. Adding about 1% rare earth ferrosilicon alloy in front of the furnace for low chromium cast iron will have a certain effect on improving the impact toughness and wear resistance of low chromium cast iron.

The casting performance of low-chromium cast iron is basically equivalent to that of ordinary white iron, and the casting shrinkage rate is between 1.6% and 1.8%.