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A kind of aluminum borate whisker reinforced zinc-based alloy composite material and preparation method thereof

A technology of aluminum borate whiskers and composite materials, applied in the field of aluminum borate whiskers reinforced zinc-based alloy composite materials and its preparation, can solve the problems of high whisker density, low strength, cracks, etc., to prevent cracks and eliminate shrinkage Porosity and holes, the effect of improving strength

Active Publication Date: 2019-07-23
BINZHOU BOHAI PISTON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical difficulties in the preparation of whisker-reinforced zinc-based composites are: 1. The whiskers have a high density, and the molten metal is not easy to completely fill the gaps in the prefabricated parts, resulting in shrinkage and holes; 2. The uniformity of the traditional wet process The strength of the whisker preform is low, and when the molten metal fills the whisker preform under high pressure, it is easy to cause cracks
Whisker-reinforced zinc-based composites with more defects cannot play a reinforcing role

Method used

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  • A kind of aluminum borate whisker reinforced zinc-based alloy composite material and preparation method thereof
  • A kind of aluminum borate whisker reinforced zinc-based alloy composite material and preparation method thereof
  • A kind of aluminum borate whisker reinforced zinc-based alloy composite material and preparation method thereof

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Effect test

Embodiment 1

[0025] A preparation method of aluminum borate whisker reinforced zinc-based alloy composite material, comprising the following steps:

[0026] (1) Take 7.5Kg of aluminum borate whiskers and 5Kg of SiO 2 -Na 2 O-B 2 o 3 Mix the glass particles, mix them evenly and put them into the high-speed stirring container, then add 9.5Kg of distilled water into the high-speed stirring container, start the stirrer to stir, the stirring speed is 4000r / min, after stirring for 2 minutes, add 1Kg of PVA, 0.5 Kg of sodium cetyl sulfonate, then reduce the stirring speed to 600r / min, stir for 5 minutes, then insert an ultrasonic vibrator into the solution, open the vibrator to vibrate for 5 minutes, and make a mixed slurry; wherein, SiO 2 -Na 2 O-B 2 o 3 The particle diameter of the glass particles is 2 μm;

[0027] (2) Put the mixed slurry into the spray dryer, and use the spray dryer to pelletize the mixed slurry to make 70 μm spherical whisker coarse particles; wherein, the diameter of...

Embodiment 2

[0032] Embodiment 2: The difference from Embodiment 1 is that in step (4), the zinc-based alloy is heated and melted at a temperature of 520°C to form a zinc-based alloy liquid for later use; 80 parts by volume of aluminum borate whiskers are prefabricated The body is preheated to 450°C in a box-type holding furnace, and the preheated aluminum borate whisker prefabricated body is put into a metal mold, poured into a zinc-based alloy liquid with a volume of 320 parts, and the mold sealing system is closed. Open the high-pressure air valve at the riser of the mold to feed nitrogen, the nitrogen pressure is 20 MPa, keep the pressure until it cools and solidifies, and obtain aluminum borate whisker-reinforced zinc-based alloy composite material. Among them, the zinc-based alloy is made of the following raw materials in mass fractions: Al28%, Cu2.5%, Mg0.02%, and the rest is Zn.

[0033] The volume fraction of the aluminum borate whisker preform of the aluminum borate whisker-reinf...

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Abstract

The invention discloses an aluminum borate whisker reinforced zinc-based alloy composite material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing aluminum borate whiskers, SiO2-Na2O-B2O3 glass granules and then mixing with distilled water; after uniformly stirring, adding PVA (Polyvinyl Alcohol) and 1-hexadecylsulfonic acid sodium salt and stirring; carrying out ultrasonic vibration to obtain mixed slurry; carrying out spheroidization treatment on the mixed slurry to obtain spherical whisker coarse granules; adding the spherical whiskercoarse granules into a rubber mold and extruding through air pressure to obtain a whisker prefabricated body blank; after calcining the whisker prefabricated body blank, naturally cooling to obtain analuminum borate whisker prefabricated body; smelting a zinc-based alloy into zinc-based alloy liquid; pre-heating the aluminum borate whisker prefabricated body and putting the aluminum borate whisker prefabricated body into a metal mold; pouring the zinc-based alloy liquid and closing the mold; pressurizing and keeping pressure until a mixture is cooled and condensed, so as to obtain a product.According to the aluminum borate whisker reinforced zinc-based alloy composite material disclosed by the invention, the defects that the aluminum borate whisker reinforced zinc-based alloy composite material has shrinkage porosity, holes, cracks and the like in a preparation process can be effectively eliminated.

Description

technical field [0001] The invention relates to the technical field of metal-based composite material preparation, in particular to an aluminum borate whisker-reinforced zinc-based alloy composite material and a preparation method thereof. Background technique [0002] Zinc alloy has excellent mechanical properties, good low-temperature casting performance and processing performance, but its heat resistance is poor, and it can only be used below 100 °C, which greatly limits its scope of application. Zinc-based composite materials overcome the shortcomings of zinc alloys in the high temperature range, such as large loss of strength and hardness, and large linear expansion coefficient, and obtain high high temperature strength, excellent wear resistance, high hardness and elastic modulus, and significantly improve Improve the fatigue life and high temperature creep resistance, reduce the coefficient of linear expansion. At present, the reinforcements of zinc-based composite m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C49/02C22C49/14C22C47/12C22C101/02
CPCC22C47/12C22C49/02C22C49/14
Inventor 林风华高晓波孟现长崔岩寿徐云庆李艳军范吉超冯业文王志龙王磊
Owner BINZHOU BOHAI PISTON CO LTD
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