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Method for improving performance of chromium-zirconium-copper alloy after brazing and chromium-zirconium-copper alloy workpiece

A chromium zirconium copper and brazing technology, applied in the field of heat treatment, can solve the problems such as grain growth of the brazing base metal, affecting the performance of the base metal, strengthening phase precipitation, etc., to ensure excellent performance, improve cooling speed, and avoid crystal grains. growing effect

Active Publication Date: 2022-07-29
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cooling rate of the chromium-zirconium-copper alloy components after brazing has a great influence on the final quality of the entire brazing. If the cooling rate is too slow, it will cause the grain growth of the brazing base metal and the precipitation of strengthening phases, which will eventually affect the performance of the base metal. Cooling rate If it is too fast, it will cause uneven cooling of the workpiece, thermal stress concentration and deformation of the workpiece, which will eventually lead to cracking of the brazing seam

Method used

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  • Method for improving performance of chromium-zirconium-copper alloy after brazing and chromium-zirconium-copper alloy workpiece
  • Method for improving performance of chromium-zirconium-copper alloy after brazing and chromium-zirconium-copper alloy workpiece
  • Method for improving performance of chromium-zirconium-copper alloy after brazing and chromium-zirconium-copper alloy workpiece

Examples

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Effect test

Embodiment 1

[0050] A method for improving the properties of a chromium-zirconium-copper alloy after brazing, comprising the following steps:

[0051] In step S1, the brazing process of the workpiece is completed in the heating furnace. After the brazing process is completed, the temperature in the heating furnace is 970°C, and the material of the workpiece is a chromium-zirconium-copper alloy;

[0052] Step S2, setting the annealing temperature of the brazed workpiece on the heating furnace to be 350° C. and the annealing time to be 2 hours;

[0053] Step S3, opening the furnace door of the heating furnace, and introducing air to reduce the temperature in the heating furnace until the temperature in the heating furnace is 40°C lower than the annealing temperature;

[0054] Step S4, closing the furnace door of the heating furnace, and heating the heating furnace to the 350° C. and maintaining it for 2 hours to complete the annealing treatment of the brazed workpiece;

[0055] Step S5, the...

Embodiment 2

[0057] A method for improving the properties of a chromium-zirconium-copper alloy after brazing, comprising the following steps:

[0058] In step S1, the brazing process of the workpiece is completed in the heating furnace. After the brazing process is completed, the temperature in the heating furnace is 980°C, and the material of the workpiece is a chromium-zirconium-copper alloy;

[0059] Step S2, setting the annealing temperature of the brazed workpiece on the heating furnace to be 400° C. and the annealing time to be 1 hour;

[0060] Step S3, opening the furnace door of the heating furnace, and introducing air to reduce the temperature in the heating furnace until the temperature in the heating furnace is 40°C lower than the annealing temperature;

[0061] Step S4, closing the furnace door of the heating furnace, the heating furnace is heated to the 400° C. and kept for 1 hour to complete the annealing treatment of the brazed workpiece;

[0062] Step S5, the workpiece is ...

Embodiment 3

[0064] A method for improving the properties of a chromium-zirconium-copper alloy after brazing, comprising the following steps:

[0065] In step S1, the brazing process of the workpiece is completed in the heating furnace. After the brazing process is completed, the temperature in the heating furnace is 990°C, and the material of the workpiece is a chromium-zirconium-copper alloy;

[0066] Step S2, setting the annealing temperature of the brazed workpiece on the heating furnace to be 450° C. and the annealing time to be 1 hour;

[0067] Step S3, opening the furnace door of the heating furnace, and introducing air to reduce the temperature in the heating furnace until the temperature in the heating furnace is 60°C lower than the annealing temperature;

[0068] Step S4, closing the furnace door of the heating furnace, and heating the heating furnace to the 450° C. and maintaining it for 1 hour to complete the annealing treatment of the brazed workpiece;

[0069] Step S5, the w...

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Abstract

The invention provides a method for improving the performance of a brazed chromium-zirconium-copper alloy and a chromium-zirconium-copper alloy workpiece. According to the method, firstly, the heat convection effect of first gas is utilized, the temperature of the chromium-zirconium-copper alloy after brazing is rapidly reduced, solid solution strengthening of precipitation strengthening alloy such as chromium-zirconium-copper is completed, the chromium element in the alloy is subjected to solid solution in a copper matrix, and a solid solution is formed to strengthen the matrix; by means of the method, the problem that the brazing quality is reduced due to the fact that the cooling speed is too low or too high can be avoided, and finally compared with an existing workpiece subjected to air cooling treatment, the workpiece treated through the method has the advantages that the brazing quality is improved, and the brazing quality is improved. The strength of the brazed workpiece is improved, the excellent performance of the workpiece in the using process is guaranteed, and energy needed by re-heating annealing of the workpiece is saved.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a method for improving the performance of a chromium-zirconium-copper alloy after brazing and a chromium-zirconium-copper alloy workpiece. Background technique [0002] my country's aerospace industry has grown from weak to strong. Countless astronauts have overcome difficulties and obstacles and have made great progress and progress. At the same time, manned space related projects are also increasing, which not only puts forward higher requirements for the quality and performance of launch vehicles , the requirements for the reliability and stability of the launch vehicle are also more stringent. Among them, the engine provides the core power necessary for the operation of the rocket, and the liquid rocket engine overcomes the disadvantages of specific impulse and thrust control, and has the advantages of repeated starting and long working time. It has good applicability ...

Claims

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Application Information

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IPC IPC(8): C22F1/08C22F1/02C21D9/00B23K1/008F02K9/62
CPCC22F1/08C22F1/02C21D9/0068B23K1/008F02K9/62
Inventor 黄元春程君华刘宇肖政兵黄宇宽张温华
Owner CENT SOUTH UNIV
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