Chromium Carbide Coated Insert Tools for Wear Resistance
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Solution Overview
Problem
Existing insert tools, such as chisels and drills, face durability issues due to wear and tear during processing tasks, leading to reduced effectiveness and lifespan.
Innovation Solution
The insert tool features a main body made of high-speed steel with a chromium carbide or hard metal coating, applied via laser metal deposition, which provides enhanced hardness and durability by local reinforcement and protection, especially in critical regions like the tool head and shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main body is made of high-speed steel with standard hardness, then the tool is easy to manufacture and machine, but the durability and wear resistance are insufficient
Solution Approach 1:
The insert tool combines high-speed steel main body with chromium carbide or hard metal coating to create a composite structure. The main body provides toughness and ease of manufacture, while the hard coating layer provides superior wear resistance and durability, resolving the contradiction between manufacturability and service life.
Solution Approach 2:
Instead of making the entire tool from hard material, the invention applies hard coating only to specific surfaces and regions that require wear resistance. This localized application maintains the ease of manufacture of the steel body while providing enhanced durability where needed most.
2Reliability
If the entire tool is made of hard material, then the wear resistance improves, but the toughness and impact resistance decrease
Solution Approach 1:
The combination of ductile high-speed steel base material with brittle hard coating creates a composite structure where each material contributes its superior properties. The steel provides toughness and impact resistance, while the coating provides wear resistance, resolving the contradiction between hardness and toughness.
Solution Approach 2:
The hard coating is applied selectively to surfaces subject to wear, while the tougher steel material remains in the bulk and non-critical areas. This spatial differentiation of material properties allows the tool to have both wear-resistant surfaces and a tough interior structure.
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 significantly prolongs the tool's durability and efficiency by providing a harder, more resistant surface that withstands high forces and wear, enhancing its performance and extending its operational life.
Implementation Method 1
The insert tool has a main body, having a first hardness, and having a coating which has a second hardness that is greater than the first hardness. It is proposed that the coating be applied by an LMD (laser metal deposition or laser application welding) process.
Implementation Method 2
In the LMD process, a laser produces a melt bath on the surface of the insert tool, in particular the main body.
Data Source
AI summary
An insert tool, in particular a chisel or a drill, has a tool head, with a shaft region in which a main body is arranged. The main body has a first hardness, and with a coating which has a second hardness that is greater than the first hardness. The coating has chromium carbide or consists of chromium carbide. Advantageously, the durability of the insert tool can be prolonged as a result.