Cemented Carbide Cutting Tool Thermal Cracking Resistance
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Solution Overview
Problem
Conventional cutting tools experience thermal cracking and chipping when cutting heat-resistant alloys like Inconel and titanium, leading to reduced performance due to inadequate wear and fracture resistance.
Innovation Solution
A cutting tool made from cemented carbide with a specific composition and structure, including 11.5-12.5% Co, 0.2-0.6% Cr3C2, and optimized WC particle size, antimagnetic force, and Rockwell hardness, combined with a coating layer, to enhance thermal conductivity, toughness, and wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cutting tools are used for cutting heat-resistant alloys, then the cutting edge reaches high temperatures, but thermal cracking occurs and leads to chipping and fracture
Solution Approach 1:
The invention changes the chemical composition parameters of the cemented carbide by precisely controlling the content of Co (11.5-12.5%), Cr3C2 (0.2-0.6%), and WC particle size (0.85-1.05 μm). These parameter changes optimize the balance between thermal conductivity and toughness, enabling the cutting edge to withstand high temperatures without thermal cracking while maintaining structural integrity
Solution Approach 2:
The invention uses a composite cemented carbide material consisting of WC (tungsten carbide) as the hard phase, Co (cobalt) as the binder phase, and Cr3C2 (chromium carbide) as a strengthening phase. This composite structure combines the high thermal conductivity of WC, the ductility and toughness of Co, and the crack-resistance of Cr3C2, creating a material that resists thermal cracking at elevated temperatures
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 cutting tool significantly reduces thermal cracking and improves wear and fracture resistance, resulting in superior cutting performance and extended tool life during high-temperature cutting processes.
Implementation Method 1
The cutting tool made from a cemented carbide... reduces the occurrence of thermal cracking on the cutting edge during cutting of the heat resistant alloy... excellent in both wear resistance and fracture resistance
Data Source
AI summary
There is provided a cutting tool having high wear resistance and fracture resistance by reducing the occurrence of thermal cracking on a cutting edge even during a cutting process of a heat-resistant alloy in which the cutting edge reaches high temperatures. The cutting tool is made from a cemented carbide that is composed mainly of a WC phase and contains 11.5-12.5% by mass of Co and 0.2-0.6% by mass of Cr in terms of Cr3C2. The WC phase has a mean particle size of 0.85-1.05 µm, an antimagnetic force (Hc) of 13.0-16.0 kA/m, and a Rockwell hardness (HRA) of 89.5-90.5.