Metallographic corrosive agent and metallographic structure display method of crimped core wire

Abstract

The invention provides a metallographic structure display method of a crimped core wire. The display method comprises the following steps: step1, providing a metallographic sample of a plurality of copper wire and copper alloy wires, wherein the metallographic sample comprises a plurality of core wire copper layers and copper alloy layers surrounding and crimping outside the plurality of core wirecopper layers; step2, adding a polyster; step3, mechanically grinding the metallographic sample, and performing mechanical polishing on the grinded metallographic sample; step4, providing a metallographic corrosive agent, and impregnating the metallographic corrosive agent with the metallographic sample for metallographic micro corrosive, wherein the metallographic corrosive agent is a mixed solution of ferric chloride, hydrochloric acid and alcohol; and step5, washing and drying the corroded metallographic sample, and observing a multi-core copper layer and the copper alloy layer of the dried metallographic sample by a microscope, thereby clearly showing the boundary between the core wire copper layer and the copper alloy layer after crimping, and facilitating observation of the crimpingeffect between the core wires and between the core wires and the alloy copper layer.

Description

【Technical field】 [0001] The invention relates to a metallographic structure observation test technology, in particular to a metallographic etchant applied to the metallographic microstructure observation of a plurality of core wires crimped with an alloy copper layer, and a method for displaying the metallographic structure of the crimped core wires. 【Background technique】 [0002] The internal structure of metal materials is directly and closely related to material properties such as hardness, strength, and ductility. Metallographic observation is the most direct and effective method for studying the internal structure of metal materials. Metallographic refers to the chemical composition of metal or alloy and the physical state and chemical state of various components inside the metal or alloy. The metallographic microstructure observation method can be used to observe the boundaries and thicknesses of different metal or alloy layers. Among them, the observation of the me...

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Problems solved by technology

[0003] However, in the prior art, the effect of layered metallographic microstructure display on several core wires after crimping with alloy copper layer is relatively poor, and the method and steps of performing metallographic microstructure display on crimped core wires are cumbersome

For example, the electrolytic corrosion of core wire and copper alloy will be affected by factors such as voltage, current, temperature and time, and the degree of corrosion is difficult to control

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