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Ceramic shell mould used for beryllium aluminium alloy, and preparation method thereof

A ceramic mold shell, beryllium aluminum alloy technology, applied in metal processing equipment, manufacturing tools, casting and molding equipment, etc., can solve the difficulties of increasing protection, high toxicity of beryllium oxide, serious environmental pollution, etc., to save raw material costs and The effect of protection cost, simple preparation process and low environmental requirements

Active Publication Date: 2014-03-26
西北稀有金属材料研究院宁夏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that beryllium oxide has high toxicity, high cost, serious environmental pollution, and increases the difficulty of protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: A method for preparing a mold shell for Be-38%Al alloy precision casting:

[0028] 1. Prepare the wax mold required for the product according to the existing method. First, preheat the wax material in the wax injection machine to the range of 65 ℃ ~ 70 ℃, then fill the wax material into the metal steel mold within 15 ~ 30 seconds, after holding the pressure for 30 ~ 60 seconds, put The formed wax pieces are taken out from the metal steel mold and placed in a normal temperature water pool. After cooling for 1 to 2 hours, the dimensions are measured. After each dimension meets the requirements of the drawing, it is a qualified wax mold.

[0029] 2. Mixed slurry:

[0030] Binder: Silica sol with a silica content of 30% and a pH of 6 to 8: 96%,

[0031] YQ-C01 organic defoamer: 0.5%,

[0032] YQ-D01 organic wetting agent: 0.5%,

[0033] Pure water: 3%.

[0034] Surface layer slurry: mix calcined alumina powder (300-325 mesh part...

Embodiment 2

[0044] Example 2: A method for preparing a mold shell for Be-34%Al-4%Ni alloy precision casting:

[0045] 1. Prepare the wax mold required for the product according to the existing method. First, preheat the wax material in the wax injection machine to the range of 65 ℃ ~ 70 ℃, then fill the wax material into the metal steel mold within 15 ~ 30 seconds, and after holding the pressure for 30 ~ 60 seconds, put The formed wax pieces are taken out from the metal steel mold and placed in a normal temperature water pool. After cooling for 1 to 2 hours, the dimensions are measured. After each dimension meets the requirements of the drawing, it is a qualified wax mold.

[0046] 2. Mixed slurry:

[0047] Binder: Binder: Silica sol with a silica content of 30% and a pH of 6 to 8: 97%,

[0048] YQ-C01 organic defoamer: 0.5%,

[0049] YQ-D01 organic wetting agent: 0.5%,

[0050] Pure water: 2%.

[0051] Surface layer slurry: mix calcined alumina powder ...

Embodiment 3

[0061] Example 3: A method for preparing a mold shell for Be-34%Al-4%Ni alloy precision casting:

[0062] 1. Prepare the wax mold required for the product according to the existing method. First, preheat the wax material in the wax injection machine to the range of 65 ℃ ~ 70 ℃, then fill the wax material into the metal steel mold within 15 ~ 30 seconds, and after holding the pressure for 30 ~ 60 seconds, put The formed wax pieces are taken out from the metal steel mold and placed in a normal temperature water pool. After cooling for 1 to 2 hours, the dimensions are measured. After each dimension meets the requirements of the drawing, it is a qualified wax mold.

[0063] 2. Mixed slurry:

[0064] Binder: Binder: Silica sol with a silica content of 30% and a pH of 6 to 8: 94%,

[0065] YQ-C01 organic defoamer: 1%,

[0066] YQ-D01 organic wetting agent: 1%,

[0067] Pure water: 4%.

[0068] Surface layer slurry: mix calcined alumina powder (300...

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Abstract

The invention relates to a ceramic shell mould used for beryllium aluminium alloy, and a preparation method thereof. The ceramic shell mould used for beryllium aluminium alloy is composed of a surface layer, a transition layer, and a reinforced layer; the surface layer is prepared by taking calcined alumina powder with a granularity of 300 to 325 meshes, and alumina sand with a granularity of 80 to 120 meshes as raw materials; the transition layer is prepared by taking mulgrain powder with a granularity of 200 to 225 meshes, and mulgrain sand with a granularity of 25 to 36 meshes as raw materials; the reinforced layer is prepared by taking mulgrain powder with a granularity of 200 to 225 meshes, and mulgrain sand with a granularity of 10 to 16 meshes as raw materials. According to the ceramic shell mould, alumina and mulgrain sand which possess no toxicity, and are cheap are taken as raw materials, so that the obtained ceramic shell mould possesses no toxicity, is safe and reliable, possesses high temperature resistance, high strength, and high stability, and no pollution is caused. The materials are low in cost, so that raw material cost and protection cost are reduced greatly; the preparation method is simple; process flow is short; production cost is low; and stability and finished product yield of obtained beryllium aluminium alloy products are high.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal processing, in particular to a ceramic formwork for beryllium aluminum alloy and a preparation method. Background technique [0002] Beryllium-aluminum alloy investment casting is a near-net-shape technology that can produce net-shape parts and reduce processing losses such as material cutting. At present, in this industry, the ceramic formwork used for casting is the beryllium oxide formwork reported by Brash Wellman's patent CN1125963A, and its preparation method is to coat and hang the beryllium oxide (BeO) slurry on the wax mold become. The disadvantage of this method is that beryllium oxide has high toxicity, high cost, serious environmental pollution, and increases the difficulty of protection. Contents of the invention [0003] The object of the present invention is to overcome the defects in the above-mentioned prior art, and provide a non-toxic, non-polluting, simple process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C1/16
Inventor 买学锋王战宏李峰于伟张起龙赵玉林高林苏东峰邓六良刘兆刚
Owner 西北稀有金属材料研究院宁夏有限公司
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