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Material performance testing method and testing tool

A technology of material properties and testing methods, applied in the field of materials, can solve the problems of large amount of superplastic forming/diffusion bonding performance testing, high development costs, and large energy consumption, so as to shorten the performance testing cycle, reduce development costs, and reduce The effect of energy consumption

Active Publication Date: 2020-12-08
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides a method for testing material properties. By designing multiple channels in the forming mold, and the air pressure of each channel can be controlled independently, it solves the problem of large test volume and cycle time of superplastic forming / diffusion connection performance testing. Long, high energy consumption, high development cost technical problems

Method used

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  • Material performance testing method and testing tool

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Experimental program
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Effect test

Embodiment 1

[0086] The specific technical scheme of superplastic forming performance test is as follows:

[0087] 1. Mold design

[0088] According to the performance of the test material aluminum alloy, the number of channels in the design mold is 6, each channel of the upper and lower molds is square, and the depths of the lower mold are: 10mm, 20mm, 30mm, 40mm, 50mm and 60mm; A row of sealing stems is designed separately in each channel; a vent hole is designed in each channel of the upper and lower molds, and each vent hole is connected to the air circuit with a pressure reducing valve and a switch valve to realize the air pressure of each channel individual controls, as shown in the figure.

[0089] 2. Mold processing

[0090] According to the mold design drawings, heat-resistant alloy steel Ni 7 N carries out the processing of the mould, and welds the pipelines with pressure reducing valves and switching valves on all the vent holes of the mould.

[0091] 3. Superplastic forming...

Embodiment 2

[0100] The specific technical scheme of diffusion connection performance test is as follows:

[0101] 1. Mold design and processing

[0102] Mold is identical with the mold of embodiment one.

[0103] 2. Diffusion connection test

[0104] According to the diffusion bonding process flow, the diffusion bonding performance test of different process parameters is carried out. The process is as follows:

[0105] 1) Cut the titanium alloy plate according to the size of the mold channel, and pickle; at the same time, seal and weld the plates in pairs, and conduct a vacuum test to ensure that the internal pressure of the blank after sealing and welding is less than 0.01MPa;

[0106] 2) Put the mold into the furnace, clean the surface and check the air tightness, and insert the thermocouple into the mold at the same time; connect the pipelines of each channel of the upper and lower molds with the intake and exhaust pipelines, and open the switch valve, Use the pressure reducing valve ...

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Abstract

The invention relates to a material performance testing method and a testing tool. The method comprises the following steps: determining design parameters of a die according to the performance of a material, the design parameters comprising the number of channels, n being a positive integer greater than or equal to 3, and the air pressure of each channel being independently controlled; machining amold according to the design parameters; and putting the material into a mold, and testing the superplastic forming performance / diffusion bonding performance. The material performance testing methodaims to solve the problems of large test quantity, long period, large energy consumption and high development cost of superplastic forming / diffusion bonding performance test.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a material performance testing method and testing tooling. Background technique [0002] Superplastic forming / diffusion joining technology has a wide range of application values ​​in industrial production due to its advantages of one-time forming of complex components, high forming precision, and good overall performance of formed components. For a new material, it is necessary to test and evaluate the superplastic forming performance, diffusion bonding performance and superplastic forming parts performance of the material in order to judge whether it is suitable for superplastic forming / diffusion bonding forming method. [0003] For the superplastic forming performance test, the method of high-temperature single-tension test is mainly used, but since the stress state during superplastic forming is mainly two-way stretching, it is very necessary to test the superplastic forming...

Claims

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Application Information

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IPC IPC(8): G01N33/207G01N3/00G01N1/36G01N1/28G01B21/08B21D26/055B21D26/031B21D26/021
CPCG01N33/207G01B21/08G01N3/00G01N1/28G01N1/36B21D26/055B21D26/021B21D26/031G01N2001/366
Inventor 张宁王耀奇侯红亮牛涛褚楚刘文祎
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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