Thermochemical Surface Hardening for Metallic Screen Fabric Wear Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Screen fabrics in screening machines face significant wear due to mechanical stress and corrosive exposure, leading to frequent replacement and high costs, especially when using specialized wear-resistant materials, and existing coating methods are time-consuming, less accurate, and can contaminate the screened materials.
Innovation Solution
A thermochemical surface layer process, such as carburizing, nitriding, or nitrocarburizing, is applied to metallic screen fabrics to increase surface hardness and wear resistance, maintaining the material's toughness and fatigue strength while avoiding complete hardening, which is then stretched onto a screen frame under tension to produce high-quality, wear-resistant screen linings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If specialized wear-resistant steel materials (e.g., material 1.4310 or 1.0586) are used to produce screen fabrics, then wear resistance is improved, but material availability and cost are worsened
Solution Approach 1:
The screen fabric is subjected to a thermochemical surface layer process (carburizing, nitriding, or nitrocarburizing) before being stretched onto the screen frame. This preliminary surface hardening treatment increases wear resistance without requiring specialized wear-resistant steel materials, thus maintaining material availability while improving reliability.
2Reliability
If wire coating is applied to increase wear resistance, then wear resistance is improved, but manufacturing time and dimensional accuracy are worsened
Solution Approach 1:
The mechanical coating process is replaced with a thermochemical surface layer process (carburizing, nitriding, or nitrocarburizing). This substitution eliminates the time-consuming coating and curing steps while achieving comparable or superior wear resistance, thus reducing manufacturing time without compromising reliability.
3Strength
If complete hardening of the wire is performed, then surface hardness is improved, but toughness and fatigue strength are worsened
Solution Approach 1:
The thermochemical surface layer process creates a gradient in material properties: the surface layer is hardened to increase wear resistance, while the core material retains its original toughness and fatigue strength. This local differentiation of material properties allows the screen fabric to withstand both abrasive wear and dynamic loading without compromising overall reliability.
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 method significantly enhances the wear resistance of screen fabrics, reduces logistical and production-related disadvantages, and maintains dimensional accuracy, allowing for efficient and cost-effective production of high-quality screen linings that can withstand abrasive and corrosive conditions.
Implementation Method 1
A method for increasing the wear resistance of a metallic screen fabric made of wire, the method comprising: treating a surface of a metallic screen fabric by means of a thermochemical surface layer process, such as a carburizing process
Implementation Method 2
A method for increasing the wear resistance of a metallic screen fabric made of wire, the method comprising: treating a surface of a metallic screen fabric by means of a thermochemical surface layer process, such as a nitriding process
Implementation Method 3
A method for increasing the wear resistance of a metallic screen fabric made of wire, the method comprising: treating a surface of a metallic screen fabric by means of a thermochemical surface layer process, such as a nitrocarburizing process
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a method for increasing the wear resistance of a metallic wire mesh screen, wherein the method comprises: treating a surface of a metallic wire mesh by means of a thermochemical surface coating process to increase the surface hardness and wear resistance of metals, wherein the thermochemical surface coating process modifies the microstructure of the treated metal to a predetermined penetration depth, forming a hard surface layer on the metal surface. A corresponding apparatus, a wire mesh, and a screen coating with increased wear resistance are also part of the invention.