A method for preparing high-temperature-resistant molten aluminum erosion-wear iron-based composite material

Abstract

The invention relates to a method for preparing a high-temperature-resistant molten aluminum erosion-abrasion iron-based composite material. The preparation method includes the preparation of a gradient nickel-containing ceramic prefabricated body and the preparation of an iron-based composite material, and the preparation method of a gradient nickel-containing ceramic prefabricated body Including the preparation of organic foam and ceramic slurry, the preparation of precursors by organic foam impregnation, the sintering of ceramic preforms into prefabricated bodies, the preparation of iron-based composite materials includes sand casting, iron alloy smelting and pouring. The nickel-containing gradient ceramics in the composite material form a gradient combination with the iron alloy. At the interface of the composite material, the ceramic and the metal mesh with each other, and the interface is clean and free of cracks; At the same time, it can limit the shedding of ferroalloy corrosion and ferroalloy products, which can effectively improve the metal erosion-wear resistance of composite materials.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and more specifically relates to a preparation method of an iron-based composite material capable of improving the corrosion-wear resistance of aluminum alloys. Background technique [0002] In the field of machinery, metallurgy, mining and automobile industry, the demand for complex structural parts of "three high" (ie high strength, high performance, high precision) and "three resistance" (ie wear resistance, high temperature resistance, corrosion resistance) It is increasingly urgent, especially for crucibles, liquid-filled barrels, molds, fixtures and other parts used in special conditions such as smelting, forming (casting) and hot-dip aluminum production. Such materials often face the joint action of multiple failure modes such as corrosion of high-temperature liquid alloys and high-temperature wear. Failure analysis shows: mutual promotion process. Corrosion and dissolution o...

AI Technical Summary

Problems solved by technology

Titanium alloys and intermetallic compounds have good corrosion resistance to molten aluminum and impact resistance, but are brittle and poor in thermal shock resistance, and the sintering process is complicated

Ceramic materials such as Al 2 o 3 , AlN and SiC have high melting points and wear resistance, but are brittle and not resistant to thermal shock, so they are not suitable for use as large containers and barrels

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