Resin Coating for Sliding Members Under High-Load Low Lubrication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sliding materials with resin coating layers containing PTFE, graphite, and MoS2 suffer from solid lubricant detachment under high-load conditions, leading to increased surface roughness and reduced abrasion and seizure resistance in low-lubrication environments.
Innovation Solution
A sliding member with a resin composition coating layer using polyamideimide as the binder resin, combined with PTFE and at least one of graphite or MoS2, maintains surface smoothness and enhances wear and seizure resistance by preventing surface roughening during sliding tests under high load and low-lubrication conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin coating layer with solid lubricants (PTFE, graphite, MoS2) is used, then sliding characteristics are improved, but under high-load conditions the solid lubricant detaches and surface roughness increases
Solution Approach 1:
The patent uses a composite resin composition containing polyamideimide binder resin combined with multiple solid lubricants (PTFE, graphite, and MoS2) in specific proportions. This composite formulation creates a synergistic effect where the different lubricants complement each other's properties, maintaining coating integrity and reducing surface roughness under high-load conditions while preserving excellent sliding characteristics.
2Reliability
If solid lubricant is used in the coating, then lubrication is improved, but under high load the lubricant falls off and abrasion resistance decreases
Solution Approach 1:
The patent employs a composite resin system with polyamideimide binder and a specific combination of solid lubricants (PTFE 1-20 parts, graphite 1-20 parts, MoS2 1-20 parts by weight per 100 parts binder). This composite structure ensures the lubricants remain embedded in the coating matrix under high load, maintaining both lubrication effectiveness and abrasion resistance through the synergistic interaction of multiple lubricating mechanisms.
3Ease of operation
If the coating layer is designed for low friction, then sliding performance is improved, but the coating becomes rougher after sliding tests
Solution Approach 1:
The patent optimizes the compositional parameters of the resin coating, specifically controlling the ratios of solid lubricants to binder resin and the particle size distribution of the lubricants. By adjusting these parameters within specific ranges, the coating maintains low friction coefficients during sliding while preventing surface roughening through proper material selection and formulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively maintains surface smoothness and improves wear and seizure resistance, ensuring the sliding surface remains less than half its original roughness after testing, with surface roughness reduced to 2.1 μm RzJIS or less, even under high load and insufficient lubrication.
Implementation Method 1
PTFE, graphite, and MoS2 are used as additives in a binder resin
Implementation Method 2
a solid lubricant is liable to fall off or cleave under a high-load state, as a result of which the sliding surface becomes rougher
Implementation Method 3
a resin composition including the following a binder resin including polyamideimide
Data Source
AI summary
A sliding member includes: a base material; a coating layer formed on the base material and made of a resin composition including: a binder resin including polyamideimide; PTFE dispersed in the binder resin; and at least one of graphite and MoS2 dispersed in the binder resin; wherein a surface roughness of the coating layer after a sliding test is equal to or less than the surface roughness of the coating layer before the sliding test.