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Casting forming method of a large thin-walled ceramic and alloy composite component

A technology of casting forming and composite body, which is applied in the direction of casting molding equipment, etc., can solve the problem that large thin-walled ceramic and alloy composite components cannot be formed, and achieve the effect of eliminating the source of micro cracks, realizing non-destructive composite, and ensuring reliability

Active Publication Date: 2020-05-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the existing large thin-walled ceramic and alloy composite components cannot be formed, and further proposes a casting forming method for large thin-wall ceramic and alloy composite components

Method used

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  • Casting forming method of a large thin-walled ceramic and alloy composite component

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Experimental program
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specific Embodiment approach 1

[0027] Specific embodiment one: the casting forming method of the large-scale thin-walled ceramic and alloy composite member in this embodiment is carried out according to the following steps:

[0028] Step 1, powder preparation: mix nano-SiC nano-powder with an average particle size of 30nm and SiC micro-powder with an average particle size of 500 microns in a volume ratio of 1:1, and divide them into two parts, A and B, where A The volume ratio of part and B part is 2:8,

[0029] Mix part A with SiC powder with an average particle size of 1.0mm at a volume ratio of 1:5 to obtain mixed powder C, and mix part B with Ti powder and TiAl powder at a volume ratio of 5:4:1 , to obtain mixed powder D;

[0030] The average particle diameter of the Ti powder is 100 microns, and the average particle diameter of the TiAl powder is 125 microns.

[0031] Step 2. Evenly spread the mixed powder D along the surface of the pattern in the mold, then evenly spread the mixed powder C on the mi...

specific Embodiment approach 2

[0037]Specific embodiment two: the casting forming method of large-scale thin-walled ceramics and alloy composite member in this embodiment is carried out according to the following steps:

[0038] Step 1, powder preparation: mix nano-SiC nano-powder with an average particle size of 50nm and SiC micro-powder with an average particle size of 10 microns in a volume ratio of 1:1, and divide them into two parts, A and B, where A The volume ratio of part to part B is 4:6,

[0039] Mix part A with SiC powder with an average particle size of 0.8mm at a volume ratio of 3:2 to obtain mixed powder C, and mix part B with Ti powder and TiAl powder at a volume ratio of 10:6:1 , to obtain mixed powder D;

[0040] The average particle diameter of the Ti powder is 100 microns, and the average particle diameter of the TiAl powder is 125 microns.

[0041] Step 2. Evenly spread the mixed powder D along the surface of the pattern in the mold, then evenly spread the mixed powder C on the mixed p...

specific Embodiment approach 3

[0047] Specific embodiment three: the casting method of large-scale thin-walled ceramic and alloy composite member in this embodiment is carried out according to the following steps:

[0048] Step 1, powder preparation: Mix nano-SiC nano-powder with an average particle size of 40nm and SiC micro-powder with an average particle size of 200 microns in a volume ratio of 1:1, and divide them into two parts, A and B, where A The volume ratio of part and B part is 3:7,

[0049] Mix part A with SiC powder with an average particle size of 0.9mm at a volume ratio of 1:1 to obtain mixed powder C, and mix part B with Ti powder and TiAl powder at a volume ratio of 8:5:1 , to obtain mixed powder D;

[0050] The average particle diameter of the Ti powder is 100 microns, and the average particle diameter of the TiAl powder is 125 microns.

[0051] Step 2. Evenly spread the mixed powder D along the surface of the pattern in the mold, then evenly spread the mixed powder C on the mixed powder...

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Abstract

The invention discloses a cast molding method for a large thin-wall ceramic and alloy complex component and belongs to the field of cast molding of complex components. The cast molding method is usedfor solving the problem that the large thin-wall ceramic and alloy complex component cannot be subjected to cast molding. The cast molding method comprises the steps that firstly, powder mixing is carried out, specifically, SiC nano-powder and SiC micro powder are mixed to be uniform and divided into two parts A and B, the part A and SiC powder with the average particle size being 0.8 mm-1.0 mm are mixed to be uniform, mixed powder C is obtained, the part B, Ti powder and TiAl powder are mixed to be uniform, and mixed powder D is obtained; secondly, the powder is laid in a mold, and cold pressing is carried out; thirdly, vacuum sintering and vacuum packaging are carried out; thirdly, a wax mold is pressed; fourthly, composite mold is formed; and fifthly, casting is carried out. By means ofthe cast molding method, the reliability of the ceramic and alloy complex component is guaranteed, and the reliability is improved by 70% or above.

Description

technical field [0001] The invention belongs to a casting and forming method of composite components; in particular, it relates to a casting and forming method of large thin-walled ceramic and alloy composite components. Background technique [0002] Large-scale thin-walled ceramic and alloy composite components are widely used in aerospace, aviation, ships, underwater and military industries. With the development of equipment in these fields, there are more and more requirements for the heat resistance and load-bearing integration of components. Alloys are easy to form complex structures, but the high temperature resistance of components is limited; ceramics have high temperature resistance, but are not easy to form components with complex shapes. At the same time, when ceramic components are used alone, they have low stress and impact load resistance and poor bearing capacity. The alloy and ceramics are made into composite components, which can meet the needs of heat-resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/00B22C7/02
CPCB22C7/02B22D19/00
Inventor 邹鹑鸣魏尊杰王宏伟
Owner HARBIN INST OF TECH