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Introduction to the application of self-lubricating coating technology

Introduction to self-lubricating coating technology

The development of manufacturing technology has put forward higher and higher requirements for the performance of mechanical equipment and parts. In order to prolong the service life of equipment, improve efficiency, increase reliability, and save materials and energy, The task of reducing and controlling friction and wear is becoming increasingly important. In the case of no oil, little oil and no hydrodynamic lubrication, Applying solid lubricating coating on the friction coupling is an effective solution to its lubrication problem.

Self-lubricating coating technology uses a certain coating method to evenly coat solid self-lubricating materials on the surface of parts; according to the requirements of different coating materials and different parts, air spraying, thermal spraying, roll coating, scraping, powder spraying, etc. can be used to achieve product requirements.

The core technology of self-lubricating coating technology mainly lies in the formulation of self-lubricating coating materials, which can be combined with different material formulations according to different working conditions and different treatment surfaces to solve its lubrication problems. Self-lubricating coating materials containing solid lubricants improve the friction conditions in the material work through the low-friction solid lubricant components contained in them, ensuring low friction and no abrasion and no glue operation between friction parts. Commonly used solid lubricants are graphite, MoS2, WS2, PEEK, PI, PTFE, PPS, Pb, In and other inorganic, organic and soft metals, they generally have low shear strength and low friction coefficient, and easy to form a firm lubricating film on the friction surface. Widely used in automotive safety systems, air conditioning systems and steering systems, construction machinery hydraulic systems, pumps, valves and other fields.

Technical characteristics of self-lubricating coatings

Reduce friction coefficient, increase wear resistance, reduce friction power consumption

The self-lubricating coating can be self-diffused and transferred to the substrate for continuous lubrication and protection of dual parts

Significantly improve the wear condition, effectively shorten the running-in time, prevent scratches and bites between parts, and prolong the life of parts

Improve contact fatigue life and resist thermal fatigue cracking

Maintain excellent solid lubrication and wear resistance under severe conditions, such as high and low temperatures, vacuum conditions, and radiation environments

Improve the reliability and mechanical efficiency of the overall operation, increase productivity and reduce production costs

Good damping performance, reducing noise

Reduce energy consumption, energy conservation and emission reduction, and save raw materials

Molybdenum disulfide-based self-lubricating coating technical parameters

It is currently mainly used under dry friction conditions

Material structure description:

A wear-resistant material with a molybdenum disulfide-based self-lubricating coating of 0.015 to 0.025mm and a content of not less than 20%. A transfer film can be formed during operation to protect the wear shaft.

Substrate (stainless steel, carbon steel, aluminum, copper, plastic, rubber, etc.), mainly responsible for mechanical properties.

performance index		Relevant data
Maximum bearing pressure P	static load	16N/mm ²
	dynamic load	8N/mm ²
maximum linear velocity V	dry friction	2m/s
	oil lubrication	5m/s
coefficient of friction u	dry friction	0.01~0.18
	oil lubrication	0.04~0.08
Maximum operating temperature		220℃

PK Textile coating technical parameters

Currently used for boundary lubrication, oil lubrication, and water lubrication conditions

Material structure description:

The PK textile coating is 0.025~ 0.045mm, and the formula contains a certain amount of fiber powder to improve the comprehensive friction and wear properties of the coating.

Substrate (stainless steel, carbon steel, aluminum, copper, etc.), mainly responsible for mechanical properties.

performance index		Relevant data
Maximum bearing pressure P	static load	180N/mm ²
	dynamic load	120N/mm ²
maximum linear velocity V	dry friction	2m/s
	oil lubrication	12m/s
coefficient of friction u	dry friction	0.015~0.20
	oil lubrication	0.01~0.05
Maximum operating temperature		260℃

Molybdenum disulfide-based lubricating coating belongs to dry friction self-lubrication, which is widely used in dry friction conditions, and the load is small, the friction environment is free of foreign matter, particles and other clean and good working conditions. And PK Textile coatings are fiber-reinforced coatings and are widely used in oil lubrication, boundary lubrication, and water lubrication conditions. At the same time, when there are a small amount of foreign matter or particles in high temperature, high pressure, high impact, high fatigue, and friction environments, the coating performance will not be affected.