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Electrolytic polishing solution of invar alloy and electrolytic polishing method

An electrolytic polishing and Invar alloy technology, which is applied in the field of electrolytic polishing liquid and electrolytic polishing of alloys, can solve the problems of poor quality of diffraction patterns, difficulties in polishing liquid and process parameters, and low calibration rate, so as to achieve good polishing effect and improve electrolytic polishing. Polished quality, easy to formulate results

Active Publication Date: 2018-09-07
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface stress layer produced during the processing and preparation of the Invar alloy sample makes the quality of the obtained diffraction pattern poor and the calibration rate low
Electropolishing technology is the most efficient and repeatable means of removing surface stress, but it is difficult to obtain suitable polishing liquid and process parameters

Method used

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  • Electrolytic polishing solution of invar alloy and electrolytic polishing method
  • Electrolytic polishing solution of invar alloy and electrolytic polishing method
  • Electrolytic polishing solution of invar alloy and electrolytic polishing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: The electrolytic polishing method of the Invar alloy adopts the following specific process.

[0016] The longitudinal section of the hot-rolled Invar alloy wire rod (Φ8) sample was first mechanically polished, cleaned with water alcohol after mechanical polishing, and dried. Choose analytically pure C 3 h 8 o 2 :HClO 4 :C 2 h 5 OH=1:2:22 (volume ratio) to configure electrolytic polishing fluid. Place the electrolytic polishing solution in the electrolytic tank, and pour liquid nitrogen into the electrolytic tank before electrolysis until the temperature of the electrolytic polishing solution drops to 5°C. The sample is the anode, the insoluble metal is the cathode, the polishing voltage is set to 40V, the polishing time is 15s, and the electrolyte is stirred magnetically. The samples after electropolishing are washed with water immediately, and then washed with alcohol, and then dried. The surface of the sample obtained in this embodiment is smooth...

Embodiment 2

[0017] Embodiment 2: The electrolytic polishing method of the Invar alloy adopts the following specific process.

[0018] The longitudinal section of the Invar alloy sample with a drawing deformation of 21% was first mechanically polished, cleaned with water alcohol after mechanical polishing, and dried. Choose analytically pure C 3 h 8 o 2 :HClO 4 :C 2 h 5 OH=1:2:17 (volume ratio) to configure electrolytic polishing fluid. Place the electrolytic polishing solution in the electrolytic tank, and pour liquid nitrogen into the electrolytic tank before electrolysis until the temperature of the electrolytic polishing solution drops to 10°C. The sample is the anode, the insoluble metal is the cathode, the polishing voltage is set to 35V, the polishing time is 10s, and the electrolyte is stirred magnetically. After electropolishing, the sample should be washed with water immediately, and after alcohol cleaning, it can be dried with a cold air blower. The surface of the sample...

Embodiment 3

[0019] Embodiment 3: The electrolytic polishing method of the Invar alloy adopts the following specific process.

[0020] The longitudinal section of the Invar alloy sample with a drawing deformation of 34% was mechanically ground first, cleaned with water alcohol after mechanical polishing, and dried. Choose analytically pure C 3 h 8 o 2 :HClO 4 :C 2 h 5 OH=1:2:20 (volume ratio) to configure electrolytic polishing fluid. Place the electrolytic polishing solution in the electrolytic tank, and pour liquid nitrogen into the electrolytic tank before electrolysis until the temperature of the electrolytic polishing solution drops to about 0°C. The sample is the anode, the insoluble metal is the cathode, the polishing voltage is set to 35V, the polishing time is 15s, and the electrolyte is stirred magnetically. The samples after electropolishing are washed with water immediately, and then washed with alcohol, and then dried. The surface of the sample obtained in this embodim...

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Abstract

The invention discloses an electrolytic polishing solution of an invar alloy and an electrolytic polishing method. The electrolytic polishing solution of the invar alloy is characterized in that C3H8O2, HClO4 and C2H5OH are mixed according to the volume ratio of 1 to 2 to 17-22; the invar alloy sample is placed in the electrolytic polishing solution as an anode, and insoluble metal is used as a cathode; and the temperature of the electrolytic polishing solution is 0-10 DEG C, the polishing voltage is 30-40 V, and electrolytic polishing is carried out on an invar alloy sample. According to themethod, the polishing solution is simple to prepare and good in polishing effect, the surface of the sample is flat and smooth, no obvious deformation layer is generated, and the polishing solution can be used multiple times; the stress layer on the surface can be effectively removed, the electrolytic polishing quality is effectively improved, and the high-calibration rate electron diffraction pattern is obtained; the electrolytic polishing method can effectively remove the stress layer on the surface of the sample, the electrolytic polishing quality is effectively improved, and the strong diffraction pattern which is generated by the EBSD test is facilitated, so that the high-calibration rate can be obtained, and the research of microstructure of the crystal boundary characteristic, texture, stress strain and the like of the invar alloy is facilitated.

Description

technical field [0001] The invention relates to an electrolytic polishing solution and an electrolytic polishing method for an alloy, in particular to an electrolytic polishing solution and an electrolytic polishing method for an Invar alloy. Background technique [0002] Invar alloy has a very low average linear thermal expansion coefficient and is widely used in radio, precision instruments, instruments and other industries. The demand for high-strength Invar alloys as power cable materials is increasing day by day. It not only requires high strength properties, but also requires excellent torsional properties. The mechanical properties and physical properties of Invar alloy are closely related to the crystallographic characteristics in the process of hot rolling, solid solution, drawing, aging, etc., such as grain size, grain boundary characteristics, texture type and distribution, structure transformation, recrystallization, etc. situation etc. Electron Backscatter Di...

Claims

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Application Information

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IPC IPC(8): C25F3/24
CPCC25F3/24
Inventor 杨婷孙中华吴迎飞薛峰
Owner HEBEI IRON AND STEEL
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