Method for preparing particle reinforced Fe-C composite material with big section and high volume fraction

Abstract

This invention relates to a method for preparing a composite material, which comprises the following steps: a) adding the molten Fe-C base alloy and preheated enhancing particles to the permanent mold which is rotated with horizontal shaft in high speed, and forming ring hybrid body after mixing in the eccentric field; b) by the density contrast of enhancing particles and Fe-C base alloy liquid, the enhancing particles will remove outside or inside along the circle, forming the out-shell or core of the composite material and the constructional parts. The thickness of composite layer can be controlled according to the requirement; the enhancing particles are distributed evenly, and its volume fraction can be limited 50-85vol%; the base alloy and its tissue can be designed, and it can be recycle used.

Description

Technical field [0001] The invention belongs to the preparation technology of metal composite materials, and mainly relates to a preparation method of Fe-C composite materials with large cross-section and high volume fraction reinforced by external particles. Background technique [0002] Metal Matrix Composites (MMC: Metal Matrix Composites), as a new material in the 21st century, has shown strong vitality although it has only a development history of more than 30 years. Compared with polymer matrix composites, metal matrix composites have the following characteristics: good high temperature strength; high transverse strength; good thermal conductivity, small linear expansion coefficient, good structural stability; corrosion resistance; weldable; and can Local reinforcement, therefore, metal matrix composites, especially ceramic particle reinforced metal matrix composites (PMMC) are more attractive. Many parts in industry are composite structures composed of high hardness ...

AI Technical Summary

Problems solved by technology

However, the HIP method is only suitable for small rolls, the production cost is higher, the equipment is expensive, and the manufacturing process is complicated

Research by Liu Yaohui and others in China, and research by Xu Daqing and others, all of them are cast-infiltrated thin layer (3-5mm) WCp / Fe-C composite materials on the surface, which cannot meet the requirements of repeated correction of high-speed wire roller rings.

In China, Wang Enze and others have studied the injection method to manufacture WCp / Fe-C composite materials. The core is still a composite material. The preparation process is complicated, the manufacturing cost is high, and it cannot be recycled.

Images