Method for observing metallographic structure of niobium-titanium alloy

A technology of metallographic structure and niobium-titanium alloy is applied in the field of observation of metallographic structure of niobium-titanium alloy, which can solve the problems of difficult to obtain a clear structure of niobium-titanium alloy metallographic samples, achieve easy operation, reduce corrosion amount, reduce Possible effects of erosion pits

Inactive Publication Date: 2012-01-25
WESTERN METAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the above-mentioned prior art, to provide a niobium-titanium alloy gold that can effectively solve the problem that the existing

Method used

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  • Method for observing metallographic structure of niobium-titanium alloy
  • Method for observing metallographic structure of niobium-titanium alloy
  • Method for observing metallographic structure of niobium-titanium alloy

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Effect test

Embodiment 1

[0022] Metallographic structure observation method of 10mm×10mm niobium-titanium alloy plate. It is characterized in that the sample is firstly used in the grinding machine with 150 # , 700 # , 1000 # The metallographic water sandpaper is ground step by step, the sample after grinding is washed off the sand grains, and the ground sample is polished on the polishing machine first, with a volume ratio of H 2 SO 4 : HNO 3 : HF=4:1:1 solution to chemically polish the sample, polish for 3s, and finally use a volume ratio of H 2 SO 4 : HNO 3 :HF:HCl=1:1:1:0.5 solution erosion for 10s.

Embodiment 2

[0024] Metallographic structure observation method of 10mm×10mm niobium-titanium alloy plate. It is characterized in that the sample is firstly used in the grinding machine with 150 # , 700 # , 1000 # The metallographic water sandpaper is ground step by step, the sample after grinding is washed off the sand grains, and the ground sample is polished on the polishing machine first, with a volume ratio of H 2 SO 4 : HNO 3 : HF=5:1:1 solution to chemically polish the sample, polish for 4s, and finally use a volume ratio of H 2 SO 4 : HNO 3 :HF:HCl=2:1.5:1.5:0.5 solution erosion for 15s.

Embodiment 3

[0026] Metallographic structure observation method of 10mm×10mm niobium-titanium alloy plate. It is characterized in that the sample is firstly used in the grinding machine with 150 # , 700 # , 1000 # The metallographic water sandpaper is ground step by step, the sample after grinding is washed off the sand grains, and the ground sample is polished on the polishing machine first, with a volume ratio of H 2 SO 4 : HNO 3 : HF=5:2:2 solution to chemically polish the sample, polish for 5s, and finally use a volume ratio of H 2 SO 4 : HNO 3 :HF:HCl=1:1:1:1 solution erosion for 20s.

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Abstract

The invention relates to a method for observing the metallographic structure of niobium-titanium alloy, which is characterized by comprising the following steps of: firstly, grinding a sample on a grinding machine, polishing the sample on a polishing machine, and chemically polishing the sample in a mixed solution of sulfuric acid + nitric acid + hydrofluoric acid; then, selecting a reagent of sulfuric acid + nitric acid + hydrochloric acid + hydrofluoric acid to erode the sample, and observing the metallographic structure. By using the method, the metallographic structure of niobium-titanium alloy can be observed clearly. The method provided by the invention is easy to operate without any special equipment, and good effect is achieved in the preparation of a metallographic sample of niobium-titanium alloy.

Description

Technical field: [0001] The invention relates to a method for observing the metallographic structure of a niobium-titanium alloy, and relates to a sample processing method in the process of displaying the metallographic structure of the niobium-titanium alloy. Background technique [0002] Niobium-titanium alloy is currently a widely used superconducting material. In order to study the properties of niobium-titanium alloys, it is necessary to observe the microstructure and grain size of niobium-titanium alloys to determine whether the grains are uniform, so as to improve various processes. In the existing niobium-titanium alloy literature, it is difficult to obtain a clear microstructure due to the preparation method and corrosion problems. For example, it is not easy to polish during metallographic sample preparation, but it is very easy to cause erosion pits during chemical polishing, and the alloy will cause pseudo-structure due to insufficient grinding amount. These...

Claims

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Application Information

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IPC IPC(8): G01N1/32
Inventor 武晶晶何伟马红征张雪华李荣苏丽凤叶红川
Owner WESTERN METAL MATERIAL
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