Electrolyte for cobalt removal, method for surface modification of diamond composite teeth and diamond composite teeth

An electrolyte and diamond technology, applied in the field of diamond composite teeth, can solve the problems of poor decobalt effect of diamond composite teeth and the like

Inactive Publication Date: 2019-08-27
国宏中晶集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of poor cobalt removal effect of diamond composite teeth in the prior art, and provide an electrolyte for decobaltization, a method for modifying the surface of diamond composite teeth, and a diamond composite tooth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The diamond composite tooth is used as the anode, copper is used as the cathode, and the electrolyte is composed of the following components: the concentration of sodium pyrophosphate is 5g / 100mL, the concentration of ammonium sulfide is 5g / 100mL, the concentration of sodium chloride is 6g / 100mL, sodium benzoate The concentration is 2g / 100mL. Electrolyze at 50°C for 10 hours at 1V. The cobalt content and the cobalt removal depth in the diamond layer of the diamond composite teeth after electrolytic cobalt removal were detected. As shown in Table 1. After detection, the surface of the diamond layer is mechanically polished.

Embodiment 2

[0028] The diamond composite tooth is used as the anode, copper is used as the cathode, and the electrolyte is composed of the following components: the concentration of sodium pyrophosphate is 7g / 100mL, the concentration of ammonium sulfide is 3g / 100mL, the concentration of sodium chloride is 10g / 100mL, sodium benzoate The concentration is 3g / 100mL. Electrolyze at 90°C for 7 hours at 1.3V. The cobalt content and the cobalt removal depth in the diamond layer of the diamond composite teeth after electrolytic cobalt removal were detected. As shown in Table 1. After detection, the surface of the diamond layer is mechanically polished.

Embodiment 3

[0030] The diamond composite tooth is used as the anode, copper is used as the cathode, and the electrolyte is composed of the following components: the concentration of sodium pyrophosphate is 6g / 100mL, the concentration of ammonium sulfide is 4g / 100mL, the concentration of sodium chloride is 8g / 100mL, sodium benzoate The concentration is 1g / 100mL. Electrolyze at 70°C for 15 hours at 1.1V. The cobalt content and the cobalt removal depth in the diamond layer of the diamond composite teeth after electrolytic cobalt removal were detected. As shown in Table 1. After detection, the surface of the diamond layer is mechanically polished.

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Abstract

The invention relates to the field of composite diamond segments and discloses an electrolyte for cobalt removal, a surface modification method for a composite diamond segment and the composite diamond segment. The electrolyte comprises pyrophosphate, ammonium sulfide, sodium chloride and water. When the electrolyte is utilized to perform surface modification on a diamond layer of the composite diamond segment, the content of cobalt in the diamond layer of the composite diamond segment is less than 1.2% by weight, and the cobalt removal depth can reach 0.7-0.8 mm.

Description

technical field [0001] The invention relates to the field of diamond composite teeth, in particular to an electrolytic solution for cobalt removal, a method for modifying the surface of diamond composite teeth by using the electrolytic solution, and a diamond composite tooth obtained by the method. Background technique [0002] Diamond composite teeth are made of high-quality diamond powder and cemented carbide matrix as raw materials and sintered under ultra-high pressure and high temperature conditions. During the preparation process, the cobalt in the cemented carbide matrix will enter the space between the diamond powders. Therefore, after the sintering is completed, a certain amount of metal cobalt will generally remain in the diamond layer of the composite tooth, and the cobalt in the diamond layer will directly Affect the wear resistance of diamond composite teeth, and then affect the life of diamond composite teeth. Therefore, it is necessary to decobaltize the diam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/02C25F5/00
Inventor 张岩杨凯森刘囡南郑梅李朋刘国伟刘加李敏付青青杨颀
Owner 国宏中晶集团有限公司
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