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A kind of preparation method of pure titanium metallographic sample

A technology of metallographic samples and pure titanium, which is applied in the field of preparation of pure titanium metallographic samples, can solve the problems of difficult elimination of fine scratches and difficult preparation of pure titanium metallographic samples, and achieve high sample preparation efficiency, Convenient organizational structure and easy conditions

Active Publication Date: 2020-06-12
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the pure titanium sample after coarse grinding and fine grinding is subjected to passivation treatment to form a passivation film, and then the passivation film is removed by polishing to obtain a bright and scratch-free polished surface, and then through corrosion treatment, The pure titanium metallographic sample is obtained, which solves the problems that the pure titanium metallographic sample is difficult to prepare, the fine scratches are difficult to eliminate, and is easy to cause false images. The simple preparation of the pure titanium metallographic sample is realized, and the pure Titanium metallographic sample

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  • A kind of preparation method of pure titanium metallographic sample
  • A kind of preparation method of pure titanium metallographic sample

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Effect test

Embodiment 1

[0025] The preparation method of the pure titanium metallographic sample of the present embodiment comprises the following steps:

[0026] Step 1. Cut a pure titanium sample from the annealed pure titanium part, then perform rough grinding and fine grinding on the water sandpaper in sequence, and keep the water sandpaper wet during the rough grinding and fine grinding;

[0027] Step 2, immerse the pure titanium sample after rough grinding and fine grinding in step 1 in the acidic solution for 20s to carry out passivation treatment, and then clean the pure titanium sample after passivation treatment with water; the acidic solution It is composed of nitric acid solution, hydrochloric acid solution and water with a volume ratio of 1:3:7, the mass fraction of the nitric acid solution is 66%, and the mass fraction of the hydrochloric acid solution is 37%;

[0028] Step 3, polishing the pure titanium sample after cleaning in step 2; the polishing cloth used in the polishing treatmen...

Embodiment 2

[0039] The preparation method of the pure titanium metallographic sample of the present embodiment comprises the following steps:

[0040] Step 1. Cut a pure titanium sample from the annealed pure titanium part, then perform rough grinding and fine grinding on the water sandpaper in sequence, and keep the water sandpaper wet during the rough grinding and fine grinding;

[0041] Step 2, immerse the pure titanium sample after rough grinding and fine grinding in step 1 in an acidic solution for 15s to carry out passivation treatment, and then clean the pure titanium sample after passivation treatment with water; the acidic solution It is composed of nitric acid solution, hydrochloric acid solution and water with a volume ratio of 1:3:5, the mass fraction of the nitric acid solution is 68%, and the mass fraction of the hydrochloric acid solution is 38%;

[0042] Step 3, polishing the pure titanium sample after cleaning in step 2; the polishing cloth used in the polishing treatment...

Embodiment 3

[0045] The preparation method of the pure titanium metallographic sample of the present embodiment comprises the following steps:

[0046] Step 1. Cut the pure titanium sample from the processed hard pure titanium parts, and then perform rough grinding and fine grinding on the water sandpaper in sequence, and keep the water sandpaper wet during the rough grinding and fine grinding process;

[0047] Step 2, immerse the pure titanium sample after rough grinding and fine grinding in step 1 in an acidic solution for 17s to carry out passivation treatment, and then clean the pure titanium sample after passivation treatment with water; The solution is composed of nitric acid solution, hydrochloric acid solution and water with a volume ratio of 2:4:7, the mass fraction of the nitric acid solution is 67%, and the mass fraction of the hydrochloric acid solution is 36%;

[0048] Step 3, polishing the pure titanium sample after cleaning in step 2; the polishing cloth used in the polishin...

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Abstract

The invention discloses a preparation method of a pure-titanium metallographic sample; the preparation method comprises the following steps of step 1, sequentially carrying out rough grinding and finegrinding treatment on a pure titanium sample on water abrasive paper; 2, soaking the pure titanium sample in an acid solution for passivating treatment, and then washing with water; 3, carrying out polishing treatment; and 4, carrying out corrosion treatment in the metallographic corrosion solution, then sequentially washing with water and absolute ethyl alcohol and carrying out blow-drying to obtain the pure titanium metallographic sample. According to the method, the pure titanium sample subjected to rough grinding and fine grinding treatment is subjected to passivation treatment to form apassivation film, so that the hardness of the polished surface of the pure titanium sample is increased, and then the passivation film is removed through polishing treatment, so that scratches generated in the rough grinding process and the fine grinding process are removed, and a bright and scratch-free polished surface is obtained, the problem that a pure titanium metallographic sample is not easy to prepare is solved, and the pure titanium metallographic sample with a clear structure can be obtained conveniently.

Description

technical field [0001] The invention belongs to the technical field of metallographic preparation of metal materials, and in particular relates to a method for preparing a pure titanium metallographic sample. Background technique [0002] In recent years, titanium and titanium alloys, as lightweight, high-strength, high-corrosion-resistant structural materials, have been widely used in aerospace, marine, petrochemical and other fields. Therefore, it often involves raw material inspection of titanium and titanium alloys, product quality control and inspection of titanium equipment and its parts, and testing and failure analysis of in-service equipment. Generally, the metallographic sample preparation method of titanium and titanium alloys is to first use manual grinding, use metallographic sandpaper to grind from coarse to fine, and then polish and corrode. However, the hardness of pure titanium is the lowest among the existing types of titanium and titanium alloys. Its meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/32
CPCG01N1/286G01N1/32
Inventor 周伟辛社伟李倩贾伟菊张思远李思兰毛成亮郑丽
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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