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A method for preparing superalloy honeycomb insulation board based on injection molding

A high-temperature alloy and injection molding technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low material utilization rate, large deformation of sintered products, and high raw material cost, and achieve excellent high-temperature mechanical properties and corrosion resistance. The cost of raw material powder and the effect of avoiding complicated processing technology

Active Publication Date: 2021-04-30
SHENZHEN ELEMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the honeycomb core used in the commonly used brazing method has problems such as composition segregation and abnormal grain growth, which leads to a decrease in the toughness and processing performance of the material, and cannot give full play to the excellent performance of the superalloy. In addition, the brazing honeycomb plate process has processing accuracy. Low, high post-processing costs and other defects
[0004] At present, nickel-based superalloy powder for injection molding mainly adopts plasma rotating electrode atomized alloy powder or inert gas atomized alloy powder. The superalloy powder prepared by plasma rotating electrode atomization has a large particle size, which is suitable for fine powder (≤10μm) of injection molding process. ) ratio is extremely low (≤10%), and the fine powder rate of superalloy powder prepared by inert gas atomization has increased, but it is still low (≤40%), so the material utilization rate is low and the cost of raw materials is high
On the other hand, the sintering activity of superalloy powder is low, and it often needs to be sintered for a long time above 1280 ° C, and the relative density of more than 96% can only be obtained after a sufficient amount of liquid phase is formed.
Sintering at high temperature for a long time not only increases energy and equipment consumption, but also makes it more difficult to control sintering deformation due to the appearance of a large number of liquid phases, resulting in large deformation of sintered products and low dimensional pass rate

Method used

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  • A method for preparing superalloy honeycomb insulation board based on injection molding
  • A method for preparing superalloy honeycomb insulation board based on injection molding
  • A method for preparing superalloy honeycomb insulation board based on injection molding

Examples

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Effect test

Embodiment 1

[0046] Example 1: Superalloy honeycomb heat insulation board prepared by mixing master alloy powder and carbonyl nickel powder in a ratio of 40:60

[0047] The preparation method of the superalloy honeycomb insulation board is carried out according to the following steps:

[0048] S1. Master alloy powder preparation: mix 15 parts of Ni, 25 parts of Cr, 25 parts of Co, 14 parts of Al, 13 parts of Ti, 7.5 parts of Mo and 0.2 parts of B to obtain a master alloy; melt the master alloy in a vacuum melting furnace Finally, the master alloy ingot was obtained, and the vacuum melting process was as follows: argon gas was introduced at room temperature for 40 minutes, the purity of the argon gas was 99.999%, the flow rate of the argon gas was 5 L / min, and then the vacuum was evacuated to 10 -3 Pa, then raise the temperature to 1000°C at a heating rate of 10°C / min, hold for 10 minutes, then raise the temperature to 2000°C at a heating rate of 10°C / min, hold for 30 minutes, then raise the ...

Embodiment 2

[0057] Example 2: Superalloy honeycomb insulation board prepared by mixing master alloy powder and carbonyl nickel powder at a ratio of 50:50

[0058] The preparation method of the superalloy honeycomb insulation board is carried out according to the following steps:

[0059] S1. Master alloy powder preparation: mix 32 parts of Ni, 20 parts of Cr, 20 parts of Co, 11 parts of Al, 10 parts of Ti, 6 parts of Mo and 0.2 parts of B to obtain a master alloy; melt the master alloy in a vacuum melting furnace Finally, the master alloy ingot is obtained, and the vacuum melting process is as follows: argon gas is introduced at room temperature for 30 minutes, the purity of the argon gas is 99.999%, the flow rate of the argon gas is 5 L / min, and then vacuumed to 10 -3 Pa, then raise the temperature to 1000°C at a heating rate of 10°C / min, hold for 20 minutes, then raise the temperature to 2000°C at a heating rate of 10°C / min, hold for 40 minutes, then raise the temperature to 2800°C at a...

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Abstract

The invention relates to the technical field of metal injection molding, and specifically discloses a method for preparing a superalloy honeycomb heat insulation board based on injection molding. The method comprises: S1. master alloy powder preparation; S2. feed granulation; S3. injection molding; S4. degreasing; S5. sintering; S6. hot isostatic pressing; Using this method to prepare superalloy honeycomb heat insulation panels can effectively avoid the defects of complex processing technology, high manufacturing cost, and low dimensional accuracy caused by traditional brazing processes, and the comprehensive mechanical properties of the prepared superalloy honeycomb heat insulation panels are better than those caused by brazing. Honeycomb panels prepared by welding.

Description

technical field [0001] The invention relates to the technical field of metal injection molding, in particular to a method for preparing a superalloy honeycomb heat insulation board based on injection molding. Background technique [0002] The excellent characteristics of honeycomb panels make it widely used in aerospace, trains, ships and construction fields. Because of the different application fields of honeycomb panels, the constituent materials of honeycomb panels vary. For honeycomb panels used in the aerospace field, there is no doubt that the requirements for their mechanical properties and high-temperature performance are more stringent. The use of high-temperature alloy honeycomb panels as the outer panel of the thermal protection system of aerospace vehicles can not only ensure that the internal structure does not overheat and burn, but also can withstand large external stress loads. [0003] At present, the honeycomb core used in the commonly used brazing method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/11B22F3/22B22F3/10B22F3/15B22F3/24
CPCB22F3/1017B22F3/11B22F3/15B22F3/225B22F3/24B22F2003/248B22F2998/10B22F1/103B22F1/10B22F9/04
Inventor 陈翅邵志坚屈小勇高鹏
Owner SHENZHEN ELEMENT TECH CO LTD
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