Application of Sb element in high-strength nodular cast iron tile cover

Abstract

The invention discloses application of an Sb element in a high-strength nodular cast iron tile cover. On the basis of the weight of the melt, 0.005-0.015% of stibium and 0.3-0.6% of manganese are added into the melt in a casting ladle. Compared with the traditional application of adding massive Cu, Cr and other alloy elements, copper, chrome and other alloy elements are substituted by stibium so that the consumption is obviously reduced, the pearlite content of the nodular cast iron is stabilized above 60%, and the pearlite distribution is uniform without segregation; and by using the stibium, the Si element content in the nodular cast iron is properly increased, the Si content range is widened, the boiling point of the stibium is much lower than that of copper and chrome, and the stibium waste is more beneficial to reutilization, thereby saving the resources.

Description

technical field [0001] The invention relates to the application of Sb element in the production of high-strength nodular cast iron tiles. Background technique [0002] With the rapid improvement of automobile technology, the power of the engine is getting higher and higher, which puts forward higher requirements for the material quality of the engine parts. The material quality of the key component tile cover is the most important. The original gray cast iron and low-grade ductile black cast iron can no longer meet the requirements of use, and higher materials are needed to replace them. However, the current common practice is to add Cu, Cr and other alloying elements to reduce Si elements in the production process of high-strength ductile iron tiles to ensure a large amount of pearlite, so as to ensure the high strength of the material. In addition, the suitable large-scale tile molding method is the vertical molding process, but the yield rate of this process will be gre...

AI Technical Summary

Problems solved by technology

In addition, the suitable large-scale tile molding method is the vertical molding process, but the yield rate of this process will be greatly limited. In the actual molding, a large amount of recycled materials cannot be digested and used, and the alloy elements such as Cu and Cr contained in it cannot be reused. Compared with other products, the recycling cost increases, resulting in an increase in product cost