Preparation technology of vanadium carbide reinforced grey cast iron base composite material

Abstract

The invention discloses a preparation technology of vanadium carbide reinforced grey cast iron base composite material, mainly comprising the following steps: weaving a vanadium wire mesh with vanadium wires; preparing mesh-type three-dimensional skeleton structure by tailoring, rolling by layers or overlying; manufacturing a casting mold according to casting technique; putting the vanadium wire mesh-type three-dimensional skeleton into a casting mold cavity in advance; smelting grey cast iron, and pouring liquid grey cast iron into the casting mold cavity to obtain a vanadium wire-grey cast iron binary material prefabricated body; putting the vanadium wire-grey cast iron binary material prefabricated body into a thermal treatment furnace to obtain vanadium carbide reinforced grey cast iron base composite material. The composite material prepared with the method fully performs high wear-resisting property of vanadium carbide hard phase as well as favourable ductility, convenient regulation and control and reliable technology of grey cast iron, solves the problems of incomplete reaction of composite material, uneven wild phase particle distribution, weakened wild phase interface pollution and the like, and can be widely applied to the wear-resisting fields of mines, electric power, metallurgy, coal, building materials and the like.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, in particular to a preparation process for vanadium carbide reinforced gray cast iron-based composite materials. Background technique [0002] Gray cast iron is cheap and is the most widely used cast iron. It is generally used to manufacture brackets, gearboxes, valve bodies, bearing seats and other parts. However, due to the lack of hard phases such as carbides in gray cast iron, its macroscopic hardness is very low, so gray cast iron cannot resist the cutting and wear effect of abrasives on the surface of parts under wear conditions, which makes gray cast iron difficult to apply to Equipment parts subject to abrasive wear greatly limit its scope of use. [0003] In recent years, a composite preparation process reinforced by ceramic particles has appeared to improve the wear resistance of gray cast iron, such as placing vanadium carbide or titanium nitride particles on t...

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Problems solved by technology

However, due to the lack of hard phases such as carbides in gray cast iron, its macroscopic hardness is very low, so gray cast iron cannot resist the cutting and wear effect of abrasives on the surface of parts under wear conditions, which makes gray cast iron difficult to apply to On equipment parts subject to abrasive wear, which greatly limits its scope of use

[0003] In recent years, a composite preparation process reinforced by ceramic particles has appeared to improve the wear resistance of gray cast iron, such as placing vanadium carbide or titanium nitride particles on the bottom of the mold, and then pouring gray cast iron, but the preparation process is difficult to control stably , the distribution of reinforcement particles is uneven, and it is still difficult to obtain an overall wear-resistant gray cast iron with uniform reinforcement distribution.

There are also hard particles such as vanadium carbide solidified with a binder, put into the mold, and then pour the molten metal to make the hard particles and the molten metal penetrate and fuse with each other. However, due to the decomposition of the binder at high temperature, a large amount of gas is generated. Lead to the formation of many pores inside the composite layer, the effect is not ideal

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