Method for regulating and controlling integrated casting composite interface of nickel-based high-temperature alloy/SiC ceramic composite component

A nickel-based superalloy and ceramic composite technology, applied in the field of casting technology, can solve the problems of uneven distribution and large residual stress in the interface, and achieve the effects of wide applicability, solving interface micro-crack production, and preventing local overheating.

Active Publication Date: 2021-02-12
HARBIN INST OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for controlling the integrated casting composite interface of nickel-based superalloy / SiC ceramic composite components, so as to solve the problem of increasing the number of components at the interface joint of nickel-based superalloy / SiC ceramic composite castings. The residual stress is large and the distribution is uneven

Method used

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  • Method for regulating and controlling integrated casting composite interface of nickel-based high-temperature alloy/SiC ceramic composite component

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Preparation of uncast SiC ceramics:

[0034] ①Powder 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. Part A and The volume ratio of part B is 2:8. Mix part A and SiC powder with an average particle size of 1.0mm at a volume ratio of 1:5 to obtain mixed powder C. Mix part B with Ti powder and TiAl powder according to Mix uniformly at a volume ratio of 5:4:1 to obtain a mixed powder D; the average particle size of the Ti powder is 100 microns, and the average particle size of the TiAl powder is 125 microns.

[0035] ②Preparation of cold-pressed ceramic blocks: 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 D, and then evenly spread the SiC powder with an average particle size of 1.2mm Lay it on the mixed powder C, then p...

Embodiment 2

[0046] The differences between this example and Example 1 are: the nickel-based superalloy is K418 alloy, the pouring temperature is 1700°C, the diameter of pure copper wire is 500 microns, the average grain size is 20 microns, and the fine NiTi alloy wire wound outside is 200 microns , the average grain size is 20 microns; the diameter of a single NiTi alloy wire without winding is 500 microns, and the average grain size is 20 microns; The filament diameter was 300 microns, with an average grain size of 20 microns. The warp distance is 5mm and the weft distance is 7mm. Other operating procedures are the same as in Example 1.

[0047] The composite metal mesh described in this embodiment adjusts the interface to cast K418 alloy / SiC ceramic composite components, and the interface is integrated with a temperature sensor to fully ensure the integrity of the SiC ceramic side shape, and the K418 alloy / SiC ceramic interface has high bonding strength and bending strength. It can re...

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Abstract

The invention discloses a method for regulating and controlling an integrated casting composite interface of a nickel-based high-temperature alloy / SiC ceramic composite component, and belongs to the field of casting equipment and processes. According to the method, a metal net structure woven by a single-layer multi-thread transverse and longitudinal weaving process is matched with non-poured ceramic for use, so that the problems of large residual stress and uneven distribution in an interface after casting forming under the background that parts need to be additionally arranged on the interface joint of the existing nickel-based high-temperature alloy / SiC ceramic composite component are solved. Metal warps of the metal net structure are pure copper wires, platinum-rhodium wires and singleNiTi alloy wires in sequence, wherein the NiTi alloy wires are wound around the platinum-rhodium wires and the copper wires. Metal wefts are sequentially composed of a single NiTi alloy wire, a platinum-rhodium wire around which a fine NiTi alloy wire is wound and a single NiTi alloy wire, and the specification of the metal wefts is the same as that of the metal warps. The method also has the advantages that existing equipment does not need to be replaced, the adopted materials are all conventional materials, and the applicability is wide.

Description

technical field [0001] The invention relates to a method for controlling the composite interface of an integrated casting of a nickel-based superalloy / SiC ceramic composite component, and belongs to the technical field of casting technology. Background technique [0002] The integrated casting of nickel-based superalloy / SiC ceramic composite components is an emerging forming method, which is of great significance for solving the forming requirements of heat-resistant and load-bearing integrated structures, and can be widely used in aerospace, aviation, ships, underwater and military Forming of components required by industry. And with the increase in the complexity of component structures and the need to adapt to the intelligent development of materials and structures, it is necessary to add components (such as sensors) in situ at the interface during the integrated casting and forming process of nickel-based superalloy / SiC ceramic composite components. The ceramic prefabri...

Claims

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Application Information

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IPC IPC(8): B22D19/02B22D19/16C22C49/08C22C49/14C22C47/08C22C101/14C22C111/00
CPCB22D19/0081B22D19/02B22D19/16C22C47/08C22C49/08C22C49/14
Inventor 邹鹑鸣魏尊杰王宏伟
Owner HARBIN INST OF TECH
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