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Metallographic etching solution of C70600 alloy and using method thereof

A technology of corrosion solution and alloy, which is applied in the field of metallographic corrosion solution, can solve the problems such as unsatisfactory corrosion effect of C70600 alloy, and achieve the effect of obvious phase and phase contrast, efficient corrosion, and clear grain boundary

Inactive Publication Date: 2018-06-29
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The C70600 corrosive solution has many kinds of corrosive preparations, and the corrosion effect of these corrosive solutions on the processed C70600 alloy is not ideal

Method used

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  • Metallographic etching solution of C70600 alloy and using method thereof
  • Metallographic etching solution of C70600 alloy and using method thereof
  • Metallographic etching solution of C70600 alloy and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Sampling the head and tail of 2 different tube blanks of ￠256*10mm produced by a certain company, using a wire cutting machine to make a 15*10*10mm sample, and then grinding and polishing with 180-mesh coarse sandpaper, and then When metallographic grinding and polishing is carried out with 400-1000 mesh metallographic sandpaper, the speed of the grinding and polishing machine is set to about 420 rpm; Turn / min or less, and then use 1 micron diamond grinding paste to polish on the grinding and polishing machine, and the polishing time is 2min. Observe that the surface of the sample is very smooth without any scratches, then change to a clean polishing cloth, use distilled water as a lubricant, polish for 1 minute, then rinse the surface of the sample with water, and then rinse the surface of the sample with alcohol.

Embodiment 2

[0025] Corrosion solution preparation: use a balance to weigh 1.0 grams of ferric chloride and put it in a 200ml beaker, then measure 50ml of distilled water and pour it into a 200ml beaker, then measure 30ml of concentrated hydrochloric acid and pour it into this beaker, and then measure 22ml Pour the concentrated nitric acid into the beaker, stir it fully with a glass rod to fully dissolve the ferric chloride, and let it stand for 10 minutes to corrode the metallographic sample.

[0026] figure 1 This is the metallographic structure diagram of the 1# sample corroded by the above-mentioned corrosive solution. It can be seen from the figure that the alloy structure is clear, the phase and phase contrast are obvious, and the grain boundaries are clear.

Embodiment 3

[0028] Corrosion solution preparation: use a balance to weigh 1.1 grams of ferric chloride and put it in a 200ml beaker, then measure 50ml of distilled water and pour it into a 200ml capacity beaker, then measure 28ml of concentrated hydrochloric acid and pour it into this beaker, and then measure 22ml Pour the concentrated nitric acid into the beaker, stir it fully with a glass rod to fully dissolve the ferric chloride, and let it stand for 10 minutes to corrode the metallographic sample.

[0029] figure 2 This is the metallographic structure diagram of the 2# sample corroded by the above-mentioned corrosive solution. It can be seen from the figure that the alloy structure is clear, the phase and phase contrast are obvious, and the grain boundaries are clear.

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Abstract

The invention discloses a metallographic etching solution of a C70600 alloy and a using method thereof, and relates to a metallographic etching solution for metallographic structure analysis of a metal alloy material and a using method of the metallographic etching solution. The metallographic etching solution is characterized by comprising, by weight percentage, 1.0-1.2 g of ferric trichloride, 25-30 ml of concentrated hydrochloric acid, 20-25 ml of concentrated nitric acid and 50 ml of water. The using method is characterized in that a grinding and polishing surface of a metallographic specimen is completely immersed in the metallographic etching solution in the using process, and the etching time is 3-10 minutes. According to the metallographic etching solution of the C70600 alloy, themetallographic structure figure of the etched specimen shows that the structure of the alloy is clear, the contrast between phases is obvious, and the grain boundary is clear; the metallographic structure of the specimen can be quickly and efficiently etched; and the small and uniform processing structure of a produced large-diameter alloy tube can be observed, and the reliable basis can be provided for accurate evaluation of the product quality.

Description

technical field [0001] A C70600 alloy metallographic corrosion liquid and a use method thereof relate to a metallographic corrosion liquid for metal alloy material metallographic structure analysis and a use method thereof. Background technique [0002] The C70600 alloy is equivalent to the BFe10-1-1 copper-nickel alloy tube in GB 5231-2001. It is a quaternary alloy with a copper-nickel base and a small amount of iron and manganese. Nickel can be dissolved in copper infinitely to form a continuous solid solution. Iron can improve the mechanical properties of white copper, but its solubility is small, and the addition of manganese can also improve the mechanical properties of white copper. The addition of Fe and Mn elements can significantly improve the mechanical properties and corrosion resistance of the alloy, and it has excellent properties such as seawater corrosion resistance, marine organism adhesion resistance and good thermal conductivity. It is widely used in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/18G01N1/32
CPCC23F1/18G01N1/32
Inventor 杨志强陈琴刘广龙赵祥麟王克震何峰窦瑞圆贺永东
Owner JINCHUAN GROUP LIMITED