Casting forming method of composite-configuration foam metal material

A metal foam and casting forming technology, which is applied in the field of metal foam, can solve problems such as the difficulty in realizing the controllable adjustment of complex configurations, the complicated process of metal foam in composite configurations, and the long process. Engineering applicability, controllable and adjustable pore size

Pending Publication Date: 2022-04-15
SHENYANG RES INST OF FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems that the traditional bonding or welding method for preparing metal foam with composite configuration is complicated, the process is long, and it is difficult to realize the controllable adjustment of the complex configuration.

Method used

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  • Casting forming method of composite-configuration foam metal material
  • Casting forming method of composite-configuration foam metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Place a polymer ball (StMMA copolymer ball) with a diameter of 3mm in a roll coater equipped with an ethyl silicate binder, and the roll coater makes a circular motion at a speed of 25 rpm, and the polymer The ball is evenly wrapped by the binder during the rolling process.

[0031] 2) Use a ceramic powder sprayer to evenly spray a layer of alumina ceramic powder with a thickness of 70-80 μm on the surface of the polymer ball wrapped with the binder.

[0032] 3) Put the polymer balls coated with the binder and the alumina ceramic powder on the surface into a drying oven, and dry at 100° C. for 3 hours to obtain dry polymer balls coated with the outer layer of the ceramic powder.

[0033] 4) Repeat steps 1), 2), and 3) until the thickness of the ceramic powder on the outer layer of the polymer ball reaches about 230 μm.

[0034] 5) Design the mold according to the structural characteristics of the composite configuration, place the pellets in the mold, and transfer t...

Embodiment 2

[0037] Except that the diameter of the polymer ball selected in step 1) is 4 mm, and the thickness of the coating layer is 180 μm, all other steps and process parameters are the same as in Example 1.

Embodiment 3

[0039] Except that the diameter of the polymer ball selected in step 1) is 5 mm, and the thickness of the coating layer is 150 μm, the sintering temperature in step 5) is: heating to 600 ° C at a heating rate of 5 ° C / min to completely burn the polymer ball, Heat to 900°C at a heating rate of 10°C / min, then heat to 1350°C at a rate of 50°C / min, and hold for 4 hours. All other steps and processing parameters are identical with embodiment 1.

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Abstract

The invention discloses a casting forming method of composite-configuration foam metal. The preparation method comprises the following steps: by taking a sphere with certain strength as a template, wrapping a binder by a rolling coating machine, spraying ceramic powder, drying in a mold, transferring into a sintering furnace, sintering to obtain ceramic hollow sphere preforms which are connected with one another and have a composite configuration characteristic, combining the preforms to a set position in a casting mold, and sintering to obtain the ceramic hollow sphere. And metal is smelted and poured into a casting mold, and the composite-configuration foam metal is obtained after the metal is solidified. According to the method provided by the invention, the composite-configuration foam metal can be formed at a time, secondary processing is not needed, the pore size of the prepared foam metal is adjustable and controllable, a base material is not limited, and the method has wider engineering applicability.

Description

technical field [0001] The invention belongs to the field of metal foam, and in particular relates to a method for casting and forming a composite configuration metal foam material. Background technique [0002] Metal foam has a series of excellent properties such as light weight, high specific strength, impact resistance and energy absorption, heat insulation, sound insulation, and electromagnetic wave shielding, and has become an indispensable lightweight structure in high-tech fields such as military defense, aerospace, and marine ships. Functionally integrated material. However, metal foam is usually characterized by the uniform distribution of pores in the matrix. This simple dispersion and uniform distribution not only has low strength, but also deteriorates plasticity and toughness. [0003] In recent years, material scientists at home and abroad have gradually realized that configuration compounding is an effective way to achieve high performance of foamed metals, w...

Claims

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Application Information

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IPC IPC(8): B22D25/00B22C9/04B22C7/02
Inventor 于波高鹏时坚苗治全成京昌魏彦鹏王景成刘世昌
Owner SHENYANG RES INST OF FOUNDRY
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