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Method for nitriding and coating tantalum spinneret surface with DLC film

A technology of DLC film and spinneret, which is applied in the field of nitriding and plating DLC ​​film on the surface of tantalum spinneret, can solve the problem of high price, reduced roughness of spinneret hole, spinneret spinnability and use are not as good as gold. Platinum spinneret and other problems, to achieve the effect of improving surface hardness, improving hole finish, and improving production efficiency

Pending Publication Date: 2017-05-31
长沙南方钽铌有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of gold and platinum spinnerets, domestic enterprises use tantalum spinneret surface nitriding or tantalum spinneret pre-surface nitriding in anodic oxidation treatment, but the roughness of the spinneret channel after anodic oxidation treatment is reduced, making the spinneret The spinnability and use of the head are not as good as the gold platinum spinneret

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The tantalum spinneret is a Ф16 cap-type spinneret with a hole diameter of 0.055mm and a purity of 99.95%. The equipment is an ion nitriding furnace.

[0021] The specific steps are: boil the tantalum spinneret in acid at 140°C / 30 minutes → rinse with clean water → wash twice with deionized water for 10 minutes each, put the tantalum spinneret into the furnace, raise the temperature to 500-700°C / keep warm 1 hour, vacuum up to 5×10 2, , add H, N (the ratio is 5:1), the cooling water of the furnace body is cooled, the temperature of the furnace body drops below 100°C, and the workpiece is taken out.

[0022] After ion nitriding, the tantalum spinneret was 140°C sulfuric acid / 30 minutes→clean water rinse→deionized water ultrasonic cleaning twice / 10 minutes each→alcohol ultrasonic cleaning / 10 minutes→acetone ultrasonic cleaning / 10 minutes→deionized water ultrasonic cleaning Wash / 10 minutes → dry. After observing that there is no pollution or dirt under a measuring microsc...

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PUM

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Abstract

The invention discloses a method for nitriding and coating the tantalum spinneret surface with a DLC film. The method comprises the following steps that (1) the tantalum spinneret surface is polished till the roughness is 0.02 [mu]m or above; (2) a tantalum spinneret of which the surface is polished is cleaned and dried; and (3) the cleaned tantalum spinneret is detected through a microscope, if no contamination exists, the tantalum spinneret is put in a furnace, the furnace is vacuumized till the vacuum degree is 5x10<2> Pa, the temperature is raised to 500-700 DEG C, after heat is preserved for 1-1.5 h, hydrogen and nitrogen are added, wherein the volume ratio of the hydrogen to the nitrogen is (4.5-5.5): 1, cooing is conducted through cooling water, and when the temperature in the furnace is decreased to 100 DEG C or below, the tantalum spinneret is taken out; (4) the taken-out tantalum spinneret is cleaned and dried; and (5) the cleaned tantalum spinneret is detected through the microscope and then is put in the furnace if no contamination exists, and the tantalum spinneret surface is coated with the DLC film through a magnetron sputtering method; acetylene serves as a target material for film coating, the film coating conditions are as follows: the vacuum degree is 5x10<-3> Pa to 8x10<-3> Pa, the temperature is 180-280 DEG C, and the sputtering time is 1-3 h, and the tantalum spinneret is cooled to the temperature of 100 DEG C or below after coating.

Description

technical field [0001] The invention relates to a method for nitriding and coating a DLC film on the surface of a tantalum spinneret. Background technique [0002] The spinneret is an important spinning basic component for chemical fiber textile enterprises, and its quality directly affects the mechanical properties of the chemical fiber spinning machine. The materials for manufacturing spinnerets mainly include gold-platinum (Au-Pt), tantalum and other materials, and the spinnerets are required to have high hardness, high wear resistance, high surface roughness, and good spinnability. Due to the high price of gold and platinum spinnerets, domestic enterprises use tantalum spinneret surface nitriding or tantalum spinneret pre-surface nitriding in anodic oxidation treatment, but the roughness of the spinneret channel after anodic oxidation treatment is reduced, making the spinneret The spinnability and use of the head are not as good as the gold platinum spinneret. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/35C23C14/02C23C8/36
CPCC23C14/0605C23C8/36C23C14/02C23C14/35
Inventor 蒋坤林许登峰
Owner 长沙南方钽铌有限责任公司
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