Production method of high-silicon solid solution ferrite QT500-14 and QT600-10 nodular cast iron

Abstract

The invention provides a production method of high-silicon solid solution ferrite QT500-14 and QT600-10 nodular cast iron, and belongs to the technical field of casting. According to a high-silicon solid solution ferrite theory and mechanical property requirements of tensile strength, yield strength, elongation, hardness, impact property and the like, the silicon content is reasonably formulated, the carbon equivalent and the pouring temperature are reasonably calculated according to different wall thicknesses of castings, a proper high-silicon molten iron spheroidizing inoculation mode is adopted, high-silicon solid solution ferrite QT500-14 and QT600-10 nodular iron castings with the tonnage of 1-30 tons and the main wall thickness of 10-200 mm can be produced in batches, and the problems of casting shrinkage porosity, shrinkage cavity, poor graphite form, graphite floating and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a production method of high-silicon solid-solution ferrite QT500-14 and QT600-10 nodular cast iron. Background technique [0002] High-silicon solid solution ferritic ductile iron is a new material developed and applied in recent years. The main grades of this material are QT500-14 and QT600-10, which have excellent tensile strength, elongation, and high yield strength. Ratio, it can realize the thin wall and light weight of castings, and has a wide range of applications. Since the two grades of ductile iron, QT500-14 and QT600-10, belong to new materials and have no production experience, our unit produced many pieces based on the previous experience in producing other ductile irons, which are prone to shrinkage porosity, shrinkage cavities, and broken graphite , graphite floating and other issues. Improvements are therefore proposed for this material property. C...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention: provide a kind of production method of high silicon solid solution ferrite QT500-14, QT600-10 nodular cast iron, the present invention is based on high silicon solid solution ferrite theory, according to tensile strength, yield strength, Mechanical performance requirements such as elongation, hardness, impact performance, etc., reasonable formulation of silicon content, reasonable calculation of carbon equivalent and pouring temperature according to different wall thicknesses of castings, and adoption of appropriate spheroidizing inoculation methods, can be mass-produced with a tonnage of 1-30 tons. High-silicon solid-solution ferrite QT500-14, QT600-10 ductile iron castings with a wall thickness of 10-200mm can solve the problems of casting shrinkage porosity, shrinkage cavity, poor graphite shape, graphite floating, etc.

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