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Method for observing metallographic structure of molybdenum-niobium alloy

A technology of metallographic structure and molybdenum-niobium alloy, which is applied in the field of observation of molybdenum-niobium alloy metallographic structure, can solve the problems such as difficulty in obtaining clear structure of molybdenum-niobium alloy metallographic samples, achieve sufficient grinding amount, easy operation, and reduce pits hole effect

Inactive Publication Date: 2012-04-18
WESTERN METAL MATERIAL
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  • 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 molybdenum-niobium alloy gold that can effectively solve the problem that the existing molybdenum-niobium alloy metallographic samples are difficult to obtain a clear structure, and make the molybdenum-niobium alloy metallographic structure clearly visible. Observation method of phase organization

Method used

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

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Embodiment 1

[0021] Metallographic structure observation method of 10mm×10mm molybdenum-niobium 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 away the sand particles, the sample that has been ground is polished on a polishing machine, and after polishing, the sample is first treated with a solution of potassium ferricyanide:sodium hydroxide=1:2 by volume. Erase, etch for 8s, then use the volume ratio as H 2 SO 4 : HNO 3 :HF:HCl=1:1:1:0.5 solution erosion for 2s.

Embodiment 2

[0023] Metallographic structure observation method of 10mm×10mm molybdenum-niobium 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, the sample that has been ground is polished on a polishing machine, and after polishing, the sample is first treated with a solution of potassium ferricyanide:sodium hydroxide=2:2 by volume. Erase, etch for 14s, then use the volume ratio as H 2 SO 4 : HNO 3 : HF: HCl = 2: 1.5: 1.5: 0.5 solution erosion for 4s.

Embodiment 3

[0025] Metallographic structure observation method of 10mm×10mm molybdenum-niobium 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, the sample that has been ground is polished on a polishing machine, and after polishing, the sample is first treated with a solution with a volume ratio of potassium ferricyanide:sodium hydroxide=3:2 Erase, etch for 20s, then use the volume ratio as H 2 SO 4 : HNO 3 :HF:HCl=1:1:1:1 solution erosion for 6s.

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Abstract

The invention discloses a method for observing a metallographic structure of a molybdenum-niobium alloy. The method is characterized by comprising the following steps: after grinding a sample on a grinding machine and then polishing the sample on a polishing machine, carrying out attrition on the observed surface of the sample by using a mixed solution of potassium ferricyanides and sodium hydroxides firstly; then, eroding the sample by using a reagent containing sulfuric acid, nitric acid, hydrochloric acid and hydrofluoric acid, carrying out metallographic structure observation on the sample. By using the method disclosed by the invention, the metallographic structure of a molybdenum-niobium alloy can be observed clearly. The method is easy to operate without using any special devices.

Description

technical field [0001] A method for observing the metallographic structure of a molybdenum-niobium alloy relates to a sample processing method in the process of displaying the metallographic structure of the molybdenum-niobium alloy. Background technique [0002] Molybdenum-niobium alloy is currently the most widely used target material. In order to study the performance of molybdenum-niobium alloy, it is necessary to observe the microstructure and grain size of molybdenum-niobium alloy to determine whether the grain is uniform, so as to improve various processes. In the existing literature on molybdenum-niobium alloys, 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, and it is difficult for a single etchant to show the real structure of molybdenum-niobium alloy. These problems prevent us from obtaining the ideal metallographic structure of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/32
Inventor 武晶晶何伟惠晓原杜小平李荣苏丽凤
Owner WESTERN METAL MATERIAL
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