PVD nano composite ceramic coating screw and method for manufacturing same

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 lThe 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 l 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.an 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.ayer 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;ayer 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 asecondly, 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 vn 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 tholtage 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

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...

Examples

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 nanocomposite 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 naturally cooled to obtain a PVD nanocomposite 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 nanocomposite ceramic coating 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 release port. An arc target 2 , a magnetron target 5 , a receipt device 3 and an independent workpiece holder 4 ar...

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...

Examples

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 nanocomposite 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 naturally cooled to obtain a PVD nanocomposite 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 nanocomposite ceramic coating 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 release port. An arc target 2 , a magnetron target 5 , a receipt device 3 and an independent workpiece holder 4 ar...

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