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Self-lubricating friction-reducing ceramic coated ring and preparation process thereof

A ceramic coating and self-lubricating technology, applied in metal material coating process, coating, electrolytic coating, etc., can solve the problems of micro-region fusion welding of traveler and steel ring, and achieve improved thermal insulation performance and high surface hardness and the effect of corrosion resistance, low coefficient of friction and wear rate

Inactive Publication Date: 2018-11-23
无锡市求实纺织专件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with the application number CN201480054587.2 discloses a spinning steel ring or a twisted steel ring. By coating a hard chromium dispersion layer on the surface of the steel ring, the lubricity of the steel ring is improved. However, during the speed-up process of ring spinning In the process, there may be micro-area fusion welding between the traveler and the steel ring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] S1: Ultrasonic cleaning, grinding and polishing of the metal ring body;

[0022] S2: Preheat 40% tungsten carbide, 40% boron carbide, and 20% chromium carbide at 350°C for 2 hours, and then conduct plasma spraying in a 6MPa argon environment, so that carbides with an average particle size ≤ 20nm are uniformly deposited on the metal ring body On the surface, a 100μm internal reinforcement layer is formed;

[0023] The process parameters of the above plasma spraying: argon gas flow rate 20L / min, powder feeding rate 25g / min, spraying current 60A, spraying voltage 40V, spraying distance 36mm, spray gun moving speed relative to the metal ring body 40mm / s;

[0024] S3: Mix 35% silica hollow microspheres, 40% zirconia hollow microspheres, and 25% liquid silica gel. The average pore volume of the silica hollow microspheres is 0.6cm 3 / g, the average pore diameter is 6nm, and the average pore volume of the zirconia hollow microspheres is 0.8cm 3 / g, the average pore size is 15...

Embodiment 2

[0027] Preparation technology is with embodiment 1, difference is:

[0028] S2: 50% tungsten carbide, 35% boron carbide, 15% chromium carbide, preheating temperature and time are 375°C and 2.5h respectively, plasma spraying environment: 7MPa argon atmosphere, inner reinforcement layer thickness is 150μm;

[0029] Plasma spraying process parameters: argon gas flow rate 23L / min, powder feeding rate 30g / min, spraying current 70A, spraying voltage 45V, spraying distance 38mm, spray gun moving speed relative to the metal ring body 42.5mm / s;

[0030] S3: 43% silica hollow microspheres, 35% zirconia hollow microspheres, 22% liquid silica gel, the average pore volume of silica hollow microspheres is 0.68cm 3 / g, the average pore diameter is 7nm, and the average pore volume of zirconia hollow microspheres is 1cm 3 / g, the average pore diameter is 18nm, the sintering temperature is 480°C, and the thickness of the high temperature resistant heat insulation layer is 375μm;

[0031] S4: ...

Embodiment 3

[0033] Preparation technology is with embodiment 1, difference is:

[0034] S2: 60% tungsten carbide, 30% boron carbide, 10% chromium carbide, preheating temperature and time are 400°C and 3h respectively, plasma spraying environment: 8MPa argon atmosphere, inner reinforcement layer thickness is 200μm;

[0035] Plasma spraying process parameters: argon gas flow rate 25L / min, powder feeding rate 35g / min, spraying current 80A, spraying voltage 50V, spraying distance 40mm, spray gun moving speed relative to the metal ring body 45mm / s;

[0036] S3: 50% silica hollow microspheres, 30% zirconia hollow microspheres, 20% liquid silica gel, the average pore volume of silica hollow microspheres is 0.75cm 3 / g, the average pore diameter is 8nm, and the average pore volume of zirconia hollow microspheres is 1.2cm 3 / g, the average pore diameter is 20nm, the sintering temperature is 500°C, and the thickness of the high temperature resistant heat insulation layer is 400μm;

[0037] S4: 60...

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Abstract

Disclosed are a self-lubricating friction-reducing ceramic coated ring and a preparation process thereof. The self-lubricating friction-reducing ceramic coated ring is composed of a metal ring body, a100-200 mu m internal reinforcing layer, a 350-400 mu m heat-resistant thermal insulating layer and a 500-600 mu m external friction-reducing layer, wherein the internal reinforcing layer is composedof 40-60% of tungsten carbide, 30-40% of boron carbide and 10-20% of chromium carbide; the heat-resistant thermal insulating layer is composed of 35-50% of silicon dioxide hollow microspheres, 30-35%of zirconium oxide hollow microspheres and 20-25% of liquid silicon rubber; the external friction-reducing layer is composed of 50-60% of polytetrafluoroethylene, 10-20% of silicone-modified epoxy resin, 1-5% of polyoxymethylene, 12-18% of silicon nitride, 4-8% of graphene fluoride, 2-6% of molybdenum disulfide and 1-3% of lanthanum fluoride. By means of a three-layer coating structural design, the self-lubricating friction-reducing ceramic coated ring achieves ultrahigh surface hardness and coating-ring bonding strength, improves surface self-lubricating properties, is low in friction coefficient in high-speed spinning and well meets the use requirements of high-end compact spinning and siro compact spinning.

Description

technical field [0001] The invention relates to textile machinery parts, in particular to a self-lubricating anti-friction ceramic coating steel ring and a preparation process thereof. Background technique [0002] The steel ring is a steel ring-shaped machine that plays the role of twisting and winding in the ring spinning frame and ring twisting machine. In the spinning process, especially in high-end compact spinning and Siro compact spinning, due to insufficient lubrication, the ultra-low hairiness will greatly increase the friction force of the traveler when rotating on the rotating surface of the steel ring, resulting in the traditional steel ring Under the condition of no lubrication, the contact area with the traveler will generate a high temperature of about 400-800 ° C, resulting in micro-area fusion welding between the traveler and the steel ring. This process continues with the rotation of the traveler, which will continuously increase the size of the steel rin...

Claims

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Application Information

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IPC IPC(8): D01H7/60C09D1/00C09D7/61C09D127/18C09D5/08C09D163/00C25D13/12C23C4/10
CPCC08K2003/3009C08L2201/08C08L2205/03C09D1/00C09D5/08C09D127/18C23C4/10C25D13/12C09D7/61D01H7/602C08L63/00C08K3/042C08K3/30C08K3/16C08K3/34
Inventor 戴彪
Owner 无锡市求实纺织专件有限公司
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