Composite Overlay Compound for Track Bushing Wear Resistance
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Solution Overview
Problem
Track bushings in track-type construction equipment experience significant wear due to harsh environments, leading to reduced service life and increased maintenance costs, as existing coatings and materials do not provide sufficient wear resistance.
Innovation Solution
A composite overlay compound is formed using a mixture of titanium, chrome, tungsten, vanadium, niobium, and molybdenum, with carbon and boron, and silicon, nickel, and manganese, which is applied to a substrate and fused to create a metallurgical bond, providing a thick, wear-resistant surface with dispersed hard-particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If typical track bushings are case hardened by carburizing to decrease wear, then wear resistance is improved, but service life remains relatively short
Solution Approach 1:
The patent applies composite materials by bonding a metallurgically fused alloy coating to the track bushing substrate. The coating comprises a matrix material (such as iron-based alloy) and dispersed hard particles (such as carbides, borides, or oxides of titanium, nickel, or chromium), creating a composite structure that provides superior wear resistance and extended service life compared to conventional carburized materials alone.
2Duration of action of stationary object
If a metallurgically bonded coating is applied to extend bushing life, then service life is extended, but wear resistance may not reach acceptable levels
Solution Approach 1:
The patent employs composite materials with a matrix containing dispersed hard particles (carbides, borides, or oxides) to achieve both extended service life and acceptable wear resistance. The composite structure allows the matrix to provide toughness and bonding while the hard particles provide wear resistance.
Solution Approach 2:
The patent applies parameter changes by controlling the composition, particle size distribution, and concentration of hard particles within the coating matrix. By adjusting these parameters, the coating achieves optimal balance between wear resistance and service life extension.
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 composite overlay compound significantly enhances wear resistance by up to five-fold compared to carburized parts, reducing sprocket wear and extending the life of track bushings, while maintaining moderate impact resistance.
Implementation Method 1
The overlay compound may be fused to the substrate to form a metallurgical bond between the substrate material and the overlay compound
Data Source
AI summary
A method of forming a composite overlay compound on a substrate includes forming a mixture including at least one component from a first group of component materials including titanium, chrome, tungsten, vanadium, niobium, and molybdenum. The mixture also includes at least one component from a second group of component materials including carbon and boron, and the mixture further includes at least one component from a third group of component materials including silicon, nickel, and manganese. The mixture of selected component materials is then applied to a substrate material to form an overlay compound on the substrate material. The overlay compound is fused to the substrate to form a metallurgical bond between the substrate material and the overlay compound.