PVD nano composite ceramic coating screw and method for manufacturing same

A composite ceramic and screw technology, applied in the direction of coating, metal material coating technology, layered products, etc., to achieve good adhesion, overcome heavy metal pollution problems, and easy to promote on a large scale

Inactive Publication Date: 2009-09-02
舟山市汉邦机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects, the technical problem to be solved by the present invention is how to apply a better ceramic coating in the surface treatment of the screw, thereby providing a PVD composite ceramic coated screw, which has good wear resistance and reduced lubrication performance Improve the failure rate of plastic extrusion equipment, improve the stability of equipment operation, prolong the service life of the screw, improve production efficiency and reduce production costs

Method used

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  • PVD nano composite ceramic coating screw and method for manufacturing same
  • PVD nano composite ceramic coating screw and method for manufacturing same
  • PVD nano composite ceramic coating screw and method for manufacturing same

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: Under the atmosphere of argon gas at 350°C, the nitriding-treated screw is glow-discharge cleaned, and the cleaning bias is -1000V; The transition metal Cr layer; then deposit 4 micron CrN / CN composite superhard coating under the conditions of 400°C, -200V bias, and 0.5Pa pressure; A 2-micron Cr-doped diamond-like carbon film was deposited under 0.5Pa air pressure; after the manufacture, it was naturally cooled to obtain a PVD composite ceramic-coated screw. The hardness of the surface coating of the ceramic coated screw was tested by the indentation method of the obtained screw, and the hardness of the surface coating of the ceramic coated screw was 42GPa. The thickness of the coating was measured by the optical interference method to be about 6 microns, and the coefficient of friction of the coating was tested by a friction and wear instrument to be 0.15.

Embodiment 2

[0020] Example 2: Under the environment of 400°C and argon gas, the nitriding-treated screw is glow-discharge cleaned, and the cleaning bias is -900V; The transition metal Ti layer; then deposit a 3-micron TiN / CN composite superhard coating under the conditions of 350°C, -150V bias, and 0.4Pa pressure, and the TiN crystal grain size is controlled below 10 nanometers; when the main wear-resistant layer is deposited, A 3-micron Ti-doped diamond-like carbon film was deposited under the conditions of 100°C, -80V bias voltage, and 0.4Pa air pressure; after the manufacturing was completed, it was cooled naturally to obtain a PVD composite ceramic-coated screw. The hardness of the ceramic coating screw surface coating is Hv greater than 45GPa, the coating thickness is about 6 microns, and the coating friction coefficient is 0.1.

Embodiment 3

[0021] Example 3: Under the environment of 400°C and argon gas, the nitriding-treated screw is glow-discharge cleaned, and the cleaning bias is -1200V; The transition metal Zr layer; then deposit a 3 micron ZrN / CN nanocomposite superhard coating under the conditions of 380°C, -200V bias, and 0.6Pa pressure; 1. Deposit 2 micron Ti-doped diamond-like carbon film under 0.3Pa air pressure condition; naturally cool after manufacturing, and obtain PVD composite ceramic coated screw. The hardness of the ceramic coating screw surface coating is Hv greater than 43GPa, the coating thickness is about 5 microns, and the coating friction coefficient is 0.18.

[0022] figure 1In order to implement the PVD equipment adopted in the present invention, the vacuum chamber 1 is surrounded by furnace walls, and the vacuum chamber is provided with a vacuum port and a working gas discharge port. An arc target 2 , a magnetron target 5 , a receipt device 3 and an independent workpiece holder 4 are a...

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Abstract

The invention provides a PVD nano composite ceramic coating screw. A screw substrate (7) is coated with a coating (6) consisting of a bonding layer, a primary wear-resistance layer and a lubricating layer sequentially. The method for manufacturing the screw comprises the following steps: firstly, depositing a 50 to 100 nanometer thick transitional metal bonding layer at an air pressure of 0.1 Pa; secondly, depositing a 2 to 5 micrometer thick composite ceramic layer as the primary wear-resistance layer at a temperature of between 350 and 400 DEG C, a voltage of between -50 and -200 volts and an air pressure of 0.2 to 1Pa; and finally, depositing a 1 to 3 micrometer transitional metal doped diamond carbon film layer as the lubricating layer at a temperature of between 100 and 150 DEG C, a voltage of between -50 and -150 volts and an air pressure of 0.1 to 0.5Pa. Compared with the prior art, the screw has the advantages of having lubricating performance, along with high hardness (more than 40GPa Hv hardness) and excellent wear resistance (friction coefficient about 0.1). The method is free from pollution and the coating has strong adhesive force.

Description

technical field [0001] The invention relates to a PVD nanocomposite ceramic coated screw and a manufacturing method thereof, belonging to the technical field of plastic molding equipment. Background technique [0002] The production of plastic raw materials and plastic products is inseparable from plastic machinery. Plastic machinery is an important pillar of the development of the plastics industry, the foundation of the development of the plastics industry, and is also affected by the development of the plastics industry. From a global perspective, the three major types of plastic machinery are injection molding machines, extruders and blow molding machines, which account for more than 80% of the total output value of plastic machinery. Screw and barrel are the two most core components in plastic machinery. The combined working quality of these two parts has an important impact on the plasticization of materials, product quality and production efficiency. Because high sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/60B29C47/60B32B9/00B32B33/00C23C30/00C23C14/35C23C14/54C23C14/02
Inventor 陆汉良
Owner 舟山市汉邦机械科技有限公司
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