Composite Impactor with TiC Reinforcement for Crusher Wear
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Solution Overview
Problem
Existing impactor technologies for crushers face challenges in achieving durable and simultaneous resistance to mechanical stresses, wear, and impact, with known methods struggling to maintain a perfect bond between different materials used for reinforcement.
Innovation Solution
A composite impactor with a reinforcement structure featuring alternating areas of dense micrometric globular titanium carbide particles and areas essentially free of them within a ferrous alloy matrix, achieved through an exothermic self-propagating high temperature synthesis (SHS) process, which creates a macro-microstructure for enhanced resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hard inserts are mechanically embedded into a hammer body, then wear resistance is improved, but bond durability between materials deteriorates
Solution Approach 1:
The patent merges the reinforcement elements with the matrix material through a diffusion bonding process, creating a composite structure where titanium carbide particles are embedded in a ferrous alloy matrix. The bonding interface is strengthened by interdiffusion of atoms at the interface, eliminating the weakness of mechanical embedding and creating a metallurgically bonded composite structure that resists both wear and bonding failure.
Solution Approach 2:
The patent employs a composite material structure consisting of hard titanium carbide reinforcement particles distributed within a tougher ferrous alloy matrix. This composite architecture combines the wear resistance of ceramic-like TiC with the ductility and toughness of the metal matrix, while the diffusion bonding process ensures strong interfacial adhesion between the two phases.
2Strength
If reinforcement elements are present in depth throughout the part, then resistance to mechanical stresses and wear is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs a self-service approach where the reinforcement structure is created in-situ through diffusion bonding during the manufacturing process itself. The diffusion bonding process automatically distributes reinforcement elements throughout the part volume as the materials are bonded together, eliminating the need for separate steps to position and embed reinforcements manually or through complex assembly operations.
Solution Approach 2:
The patent replaces mechanical embedding methods with a thermal-diffusion based approach. Instead of mechanically pressing or bolting reinforcements into place, the invention uses diffusion bonding where atomic diffusion during controlled heating creates strong bonds and distributes reinforcements throughout the matrix, substituting mechanical assembly with a thermally-activated material process.
3Strength
If a perfect bond between different materials is guaranteed, then composite strength is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes parameter changes in the form of controlled thermal history during diffusion bonding. By carefully controlling temperature, time, and atmospheric conditions during the bonding process, the invention creates optimal diffusion conditions that ensure complete bonding without requiring extremely tight tolerances on reinforcement positioning or surface finish, thus achieving strong bonds with moderate manufacturing precision.
Solution Approach 2:
The diffusion bonding process involves phase transitions and changes in material state during controlled heating, where the materials transition through different thermal states that facilitate atomic diffusion and bond formation. This thermal processing pathway enables the creation of strong interfacial bonds through controlled material transformation rather than relying solely on mechanical precision.
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 provides improved resistance to wear and impact while maintaining toughness, preventing crack formation and propagation, and allowing for better localization and flexibility in reinforcement design, resulting in significantly increased lifetime of impactor components compared to traditional methods.
Implementation Method 1
casting a ferrous alloy into the mold, the heat of said casting triggering an exothermic self-propagating high temperature synthesis (SHS) of titanium carbide within said precursor granules
Implementation Method 2
infiltration of the millimetric and micrometric interstices by said high temperature cast ferrous alloy
Data Source
AI summary
The present invention discloses a composite impactor for impact crushers, said impactor comprising a ferrous alloy at least partially reinforced with titanium carbide according to a defined geometry, in which said reinforced portion comprises an alternating macro-microstructure of millimetric areas concentrated with micrometric globular particles of titanium carbide separated by millimetric areas essentially free of micrometric globular particles of titanium carbide, said areas concentrated with micrometric globular particles of titanium carbide forming a microstructure in which the micrometric interstices between said globular particles are also filled by said ferrous alloy.