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Metallographic corrosive agent for nickel-copper alloy

A kind of etchant and alloy technology, which is applied in the field of metallographic etchant of nickel-copper alloy (about 35% copper content) to achieve the effect of extensive use value

Inactive Publication Date: 2012-04-25
光洋新材料科技(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to overcome the defects existing in the existing nickel-copper alloy etchant, and provide a novel nickel-copper alloy etchant. The technical problem to be solved is to make the grain boundaries in the metallographic structure clear and easy to distinguish the precipitated phase, Therefore, it is more suitable for practical use and has industrial utilization value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A metallographic etchant for nickel-copper alloys, 65% nitric acid in a glass beaker.

Embodiment 2

[0016] A metallographic etchant for nickel-copper alloys, 68% nitric acid in a glass beaker.

Embodiment 3

[0018] A metallographic etchant for nickel-copper alloys, 67% nitric acid in a glass beaker.

[0019] Perform the following steps in a ventilated environment:

[0020] A. After polishing the sample of nickel-copper alloy, obtain the polished surface of the sample of nickel-copper alloy, immerse in the metallographic etchant of nickel-copper alloy, and corrode for about 10 seconds;

[0021] B. After step A, take out the nickel-copper alloy and rinse it repeatedly with water, then gently wipe the polished surface of the nickel-copper alloy sample with a cotton ball dipped in alcohol, and let it dry naturally or blow dry.

[0022] The technological innovation of a kind of nickel-copper alloy metallographic etchant of the present invention that above-mentioned such formula constitutes, all has many merits for the technical personnel of present same industry, and really has technological advancement.

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PUM

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Abstract

The invention discloses a metallographic corrosive agent for nickel-copper alloy. The metallographic corrosive agent comprises the following components in percentage by volume: 65-68% of nitric acid and the balance of water. According to the metallographic corrosive agent for nickel-copper alloy, the crystalline phase in the nickel-copper alloy can be easily distinguished, which is favorable for evaluating the quality of the nickel-copper alloy product. In addition, the metallographic corrosive agent for nickel-copper alloy can be used for preventing forming of a pollution layer on the surface of a product, and the excessive corrosion to crystalline phase in silver-gold alloy can be prevented.

Description

technical field [0001] The invention relates to a metallographic etchant, in particular to a metallographic etchant suitable for nickel-copper alloys (with a copper content of about 35%). Background technique [0002] In the process of nickel-copper alloy research, the difference in material composition and the difference in processing and heat treatment process often lead to different types of metallographic structure, so that the performance of the alloy is also different. Observe the phase structure, and combine the performance test data to adjust the composition, processing technology or heat treatment process of the alloy in time. Usually, the nickel-copper alloy metallographic etchant of nickel-copper alloy is composed of nitric acid, hydrochloric acid, water, etc., using the above-mentioned nickel-copper alloy metallographic etchant to corrode nickel-copper alloy will often form a thin film on the surface of the metallographic sample. Contaminated layer, the observat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28G01N1/32
Inventor 贾广武高毅方家芳林胜国
Owner 光洋新材料科技(昆山)有限公司
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