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Method for displaying macroscopic grains and streamlines of aluminum alloy

A technology of aluminum alloy and crystal grains, which is applied in the field of displaying aluminum alloy macroscopic grains and streamlines. It can solve the problems of complex configuration process, harmful effects on the environment and personnel, high toxicity, etc., and achieve good results, environmental friendliness, and easy operation. Effect

Active Publication Date: 2020-06-16
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acid etching method, that is, high-concentration Keller reagent, should be used in the streamline and macroscopic grain inspection. This method has a good test effect, but this method needs to use highly toxic and corrosive HF acid, and the configuration process is complicated, which is harmful to the environment. and personnel have harmful effects

Method used

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  • Method for displaying macroscopic grains and streamlines of aluminum alloy
  • Method for displaying macroscopic grains and streamlines of aluminum alloy
  • Method for displaying macroscopic grains and streamlines of aluminum alloy

Examples

Experimental program
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Embodiment 1

[0029] The sample of this embodiment uses aluminum alloy die forgings for 6061 wheels, and the method for displaying the macroscopic grains and streamlines of aluminum alloy includes the following steps:

[0030] 1) Cut the section sample, the cut surface is the inspection surface;

[0031] 2) Milling the inspection surface of the sample to reduce its roughness; the roughness after milling ≤ 3.2μm;

[0032] 3) Polish the milled sample to further reduce its roughness; the milled sample is first polished by a cloth wheel polishing machine, and the roughness after polishing ≤ 1.0μm, 5min; then manual polishing, manual polishing to trim the part of the sample area, complete the final polishing, it takes 2min;

[0033] 4) Soak the sample in 1# alkaline etching reagent for 2 minutes, the formula of 1# alkaline etching reagent is: 10v / v%NaOH, 15v / v%NaCO 3 , The balance is water; the immersed sample should be rinsed with 35~55℃ hot water to wash away the surface corrosion products; the sample ...

Embodiment 2

[0038] The sample of this embodiment uses ZL114A aluminum alloy castings, and the method for displaying the macroscopic grains and streamlines of aluminum alloy includes the following steps:

[0039] 1) Cut the section sample, the cut surface is the inspection surface;

[0040] 2) Milling the inspection surface of the sample to reduce its roughness; the roughness after milling ≤ 3.2μm;

[0041] 3) Polish the milled sample to further reduce its roughness; the milled sample is first polished by a cloth wheel polishing machine, and the roughness after polishing ≤ 1.0μm, 5min; then manual polishing, manual polishing to trim the part of the sample area, complete the final polishing, it takes 2min;

[0042] 4) Soak the sample in 1# alkaline etching reagent for 2 minutes, the formula of 1# alkaline etching reagent is: 10v / v%NaOH, 15v / v%NaCO 3 , The balance is water; the immersed sample should be rinsed with 35~55℃ hot water to wash away the surface corrosion products; the sample after the hot...

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Abstract

The invention relates to a method for displaying macroscopic grains and streamlines of an aluminum alloy, which is characterized by comprising the following steps of: 1) intercepting a section sample,and taking an intercepted surface as an inspection surface, 2) milling the inspection surface of the sample to reduce the roughness of the inspection surface, 3) polishing the milled sample to further reduce the roughness of the sample, 4) soaking the sample in a 1# alkaline etching reagent, the 1# alkaline etching reagent comprising the following components in percentage by weight: 10-20 v / v% ofNaOH, 10-20 v / v% of NaCO3 and the balance of water, and washing the soaked sample with water. The method has the advantages of being easy to operate, simple in technological process, concise in stepand extremely short in consumed time. The etching agent is free of pollution components, common in medicines in the formula, environmentally friendly, low in economic cost, good in effect and clear inmacroscopic grain and streamline display.

Description

Technical field [0001] The present invention relates to the display of metal macrostructures, in particular to a method for displaying macroscopic crystal grains and streamlines of aluminum alloy. Background technique [0002] The inspection of metal low-power structure defects is also called macro-inspection, which is a method of inspecting metal surfaces, fractures or macro-structures and their defects with the naked eye or a magnifying glass no larger than ten times. Macro inspection is an important common inspection method in metal ingot casting, forging, forging, welding, rolling, heat treatment and other processes. This inspection method is simple and quick to operate, and can reflect the shape and distribution of the organization and defects in the metal macroscopic area. So that people can correctly and comprehensively judge the quality of metal materials to guide scientific production and rational use of materials. [0003] Streamline inspection is an important test item...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N1/28G01N1/32G01N1/34
CPCG01N21/84G01N1/286G01N1/32G01N1/34G01N2021/8477
Inventor 赵洁陈耘李雨蕾丁博远唐家耘朱宇瑾蒋锐
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH