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

A technology of short fiber reinforcement and composite materials, which is applied in the field of mechanical parts manufacturing technology, can solve the problems of reducing the mechanical properties of products, poor uniformity of blank pore distribution, time-consuming and lengthy, etc., to shorten the high-temperature sintering time, avoid micropore sealing, reduce The effect of production costs

Inactive Publication Date: 2004-03-31
张强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation method of the short fiber reinforced metal matrix composite product porous preform in this embodiment is as follows:

[0046] (1) Preparation of slurry

[0047] Add polyacrylamide, natural cellulose, water glass, and water into the container, stir with a blender until they are evenly dissolved, then add reinforcement phase materials and short fiber materials, stir with a blender to make a slurry, and let stand for 1 hour.

[0048] Reinforcing phase material, short fiber material, polyacrylamide, natural cellulose, water glass, water are mixed to make slurry by following weight ratio:

[0049] Reinforcement phase material 100

[0050] Short fiber material 70

[0051] Polyacrylamide 2

[0052] Natural Cellulose 6

[0053] water glass 8

[0054] water 350

[0055]The aforementioned reinforcing phase material is alumina particles, the aforementioned short fiber material is aluminum silicate short fibers, ...

Embodiment 2

[0066] In the slurry preparation process step of the present embodiment, the raw materials used and the weight ratio are as follows:

[0067] Reinforcement phase material 100

[0068] Short fiber material 40

[0069] Polyacrylamide 0.8

[0070] Natural cellulose 4.2

[0071] water glass 7

[0072] water 200

[0073] The above-mentioned reinforcing phase material is alumina particles, the above-mentioned short fiber material is aluminum silicate short fiber, and the aspect ratio L / D of the aluminum silicate short fiber is 10. Its processing step is identical with embodiment 1.

Embodiment 3

[0075] In the slurry preparation process step of the present embodiment, the raw materials used and the weight ratio are as follows:

[0076] Reinforcement phase material 100

[0077] Short fiber material 100

[0078] Polyacrylamide 3

[0079] Natural Cellulose 8

[0080] water glass 12

[0081] water 500

[0082] The aforementioned reinforcing phase material is alumina particles, the aforementioned short fiber material is aluminum silicate short fibers, and the aspect ratio L / D of the aluminum silicate short fibers is 100. Its processing step is identical with embodiment 1.

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PUM

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Abstract

A method of producing porous prefabricated members of composite material containing short fibers and metal. It comprises: preparing sizing material, adding 0.8í½3 polyacrylamide, 4.2í½8 natural cellulose, 7í½ 12 water glass, 200í½500 water into a container, stirring until all components are dissolved, adding 100 wild-phase material, 40í½100 short fiber material, stirring and obtaining the sizingmaterial, 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 andsintering 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22C22C47/14
Inventor 张强
Owner 张强
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