Forming method of complex prefabricated part made of metal sweating material

A prefabricated part and metal technology, applied in the field of forming metal sweating material prefabricated parts, can solve the problems of uncontrollable pore size, distribution shape, limited release of material application potential, single material distribution form, etc., to achieve optimized paving effect , the effect of promoting and expanding the ratio range

Pending Publication Date: 2022-07-29
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the prefabricated part is formed by "molding + sintering", it has many disadvantages such as uncontrollable pore size, distribution, and shape, single material distribution, and limited shape complexity, which will not only cause liquid phase in the subsequent infiltration process. The uneven filling also limits the release of material application potential

Method used

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  • Forming method of complex prefabricated part made of metal sweating material
  • Forming method of complex prefabricated part made of metal sweating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In the present embodiment, a kind of tungsten copper nozzle throat lining preform is prepared by adopting the forming method of the complex preform of metal sweating material:

[0043] (1) Selection and processing of raw materials; ① Determine the high melting point tungsten as the preform material and the low melting point copper as the infiltration material; ② Coat a layer of copper with a thickness of 2um on the surface of the spherical tungsten powder.

[0044] (2) Structural design and processing of prefabricated parts; ①According to the target composite material component ratio and performance requirements, determine the porosity of the prefabricated part to be 20%, and design the pore size of 12um, circular holes, and uniform distribution to obtain a three-dimensional model of the prefabricated part ;2 Process the three-dimensional model of the prefabricated part according to the characteristics of the laser selective melting process, and output the process model....

Embodiment 2

[0049] In the present embodiment, a tungsten-silver contact preform is prepared by a method of forming a complex preform of metal sweating material:

[0050] (1) Selection and processing of raw materials; ① Determine the high melting point tungsten as the preform material and the low melting point silver as the infiltration material; ② Apply a layer of silver with a thickness of 3um on the surface of the spherical tungsten powder.

[0051] (2) Structural design and processing of prefabricated parts; ①According to the target composite material component ratio and performance requirements, determine the porosity of the non-functional area of ​​the prefabricated part is 0, the porosity of the functional area is 30%, and the pore size of the functional area is designed to be 6um, Circular holes, evenly distributed, obtain the three-dimensional model of the preform; ② According to the characteristics of the laser selective melting process, the three-dimensional model of the preform ...

Embodiment 3

[0056] In this embodiment, a molybdenum-copper electrode preform is prepared by a method for forming a complex preform of metal sweating material:

[0057] (1) Selection and processing of raw materials; ① Determine the high melting point molybdenum as the preform material, and the low melting point copper as the infiltration material; ② Coat a layer of copper with a thickness of 3um on the spherical surface.

[0058] (2) Structural design and processing of prefabricated parts; ①According to the target composite material component ratio and performance requirements, determine the porosity of the prefabricated part to be 40%, and design the pore size of 15um, circular holes, and uniform distribution to obtain a three-dimensional model of the prefabricated part ;2 Process the three-dimensional model of the prefabricated part according to the characteristics of the laser selective melting process, and output the process model.

[0059] (3) Preparation before the preform is formed;...

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Abstract

The invention discloses a forming method for a complex prefabricated part made of a metal sweating material. The forming method comprises the steps that the types of prefabricated part materials and infiltration materials are determined; selecting a powdery prefabricated part material, and coating the surface of the powdery prefabricated part powder with the infiltration material to obtain the prefabricated part powder coated with the infiltration material; determining pore characteristics of the prefabricated member, and obtaining a prefabricated member process model according to the pore characteristics; the prefabricated part process model is partitioned on the basis of the pore characteristics, and forming areas with different pore characteristics are obtained; according to the pore characteristics of the prefabricated part, the powder particle size of the prefabricated part coated with an infiltration material required for forming the prefabricated part is determined, and according to the powder particle size and the pore characteristics of all forming areas, forming parameters of corresponding selective laser melting forming equipment are determined; and according to the determined powder particle size and the forming parameters corresponding to all the forming areas, overall forming of the prefabricated part is completed through the selective laser melting forming technology.

Description

technical field [0001] The invention belongs to the technical field of composite material forming, in particular to a method for forming a metal sweating material preform with a complex structure. Background technique [0002] Metal sweating materials, also known as pseudo-alloys (pseudo-alloys), are a class of high-performance metal matrix composites that exist in independent and homogeneous phases instead of two or more alloy phases. Such materials have excellent thermal, mechanical and electrical properties, and are often used in aerospace, electronics, machining and other fields to manufacture high-temperature-resistant spacecraft devices, electrical switch contacts, and EDM electrodes. [0003] Traditional metal sweating material parts are formed by powder metallurgy process, and are made by mixed powder liquid phase sintering method or "preform + infiltration" method. Among them, mixed powder liquid-phase sintering is to press and form the evenly mixed composite mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F10/85B22F10/38B22F1/065B22F1/052B22F1/17C22C1/04B33Y10/00B33Y50/02B33Y70/00
CPCB22F10/28B22F10/85B22F10/38C22C1/0475B22F1/065B22F1/052B22F1/17B33Y10/00B33Y50/02B33Y70/00
Inventor 杨欢庆何小虎白静彭东剑王云李典曹明
Owner XIAN SPACE ENGINE CO LTD
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