Method for manufacturing porous preformed component of short fiber-reinforced metal matrix composite product

Abstract

A method of producing porous prefabricated members of composite material containing short fibers and metal. It comprises: preparing sizing material, adding 0.8-3 polyacrylamide, 4.2-8 natural cellulose, 7-12 water glass, 200-500 water into a container, stirring until all components are dissolved, adding 100 wild-phase material, 40-100 short fiber material, stirring and obtaining the sizing material, standing for 1 hour; the wild-phase material selected from aluminum oxide, silicon oxide, silicon carbon, boron oxide; the short fiber material selected from aluminum silicate, or aluminum oxide, or silicon oxide, or carbon; 2) predehydrating;3) producing blanks; 3) baking: putting the dried blanks into a baking oven, sintering for 3hours at 200degree C, then heating to 1200degree C and sintering for 8hours, and obtaining prefabricated members.

Description

technical field [0001] The invention belongs to the technical field of manufacturing technology of mechanical parts, and in particular relates to a method for preparing a porous preform of a short fiber reinforced metal matrix composite material product. Background technique [0002] Fiber-reinforced metal matrix composites are a branch of modern composite materials that have been developed and applied relatively rapidly in the past two decades. Compared with particle-reinforced metal matrix composites, they have better plasticity and toughness. The short fiber whose length-to-diameter ratio L / D is generally between 10 and 100 has low price, wide sources, wide range of products and strong competitiveness. [0003] One of the most practical and market-competitive methods for manufacturing fiber-reinforced metal matrix composites is to prefabricate the short fiber reinforced phase into a molded member with a certain mechanical strength and a relatively uniform spatial pore str...

AI Technical Summary

Problems solved by technology

The main technical problems are: 1. The working pressure of felting is high and the kinetic energy consumption is high; 2. The pore distribution uniformity of the blank is poor; 3. The high temperature sintering takes a long time to create pores; The reverse effect of closure; 5. The situation corresponding to 4 will cause the matrix metal to be unable to enter the closed micropores in the subsequent composite process, resulting in hole defects in the product and reducing the mechanical properties of the product; 6. Difficult to manufacture Obtain high-quality multi-component reinforced phase pre-components