Titanium Fire-Resistant Shell Coating With Controlled Interface Bonding
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Solution Overview
Problem
Existing methods for manufacturing titanium alloy components, such as high-pressure compressor casings, face challenges in controlling the interface position and thickness ratio between titanium and other alloys, leading to low shear resistance and high costs due to differences in expansion coefficients and complex assembly processes.
Innovation Solution
A method involving additive manufacturing of a titanium fire-resistant covering layer on a titanium-based shell, followed by heat treatment, with optional intermediate layers forming a composition gradient to enhance adhesion and mechanical properties, optimizing the thickness and position of the interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional assembly methods (hot rolling, hydraulic plating, sockets) are used to fix titanium component and another alloy component, then the components can be assembled, but the interface position control is difficult and thickness ratio cannot be controlled within tolerances
Solution Approach 1:
The patent merges the titanium component and another alloy component into a single integrated structure through additive manufacturing, eliminating the need for separate assembly operations. The covering layer is directly deposited onto the titanium component, creating a unified part with precisely controlled interface position and thickness ratio that eliminates tolerance accumulation issues.
Solution Approach 2:
The interface position and thickness ratio are predetermined and built-in during the additive manufacturing process itself, rather than being adjusted during assembly. The digital model defines the exact interface geometry before manufacturing, allowing precise control to be achieved during the deposition process rather than requiring post-assembly adjustments.
2Strength
If traditional assembly methods are used to fix titanium component and another alloy component, then components can be joined, but shear and peel resistance are low due to significant expansion coefficient differences
Solution Approach 1:
The patent changes the manufacturing parameters by using additive manufacturing with controlled deposition conditions, allowing precise control over the interface geometry and material distribution. This enables optimization of the transition zone between materials with different expansion coefficients, improving shear resistance and reducing separation risk.
Solution Approach 2:
The patent creates a composite structure where a covering layer of one alloy is directly deposited onto a titanium component, forming a metallurgically bonded composite material. This direct bonding creates a stronger interface with improved shear and peel resistance compared to mechanical assembly methods, while the controlled composition gradient manages thermal expansion differences.
3Ease of manufacture
If traditional assembly methods with multiple steps and machining are used, then components can be assembled, but the manufacturing cost is high
Solution Approach 1:
The patent combines multiple manufacturing operations into a single additive manufacturing process. The titanium component and covering layer are created in one integrated build process, eliminating separate assembly, machining, and post-processing steps that traditionally increased both cost and production time.
Solution Approach 2:
The patent replaces traditional mechanical assembly methods (hot rolling, hydraulic plating, socket insertion) with an additive manufacturing process. This substitution eliminates the need for complex assembly equipment and multiple operational steps, reducing both manufacturing cost and production time while improving interface quality.
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
This method improves the control over the interface and shear resistance between titanium and other alloys, reducing the risk of separation and lowering costs by optimizing the thickness and mechanical properties of the metal component.
Implementation Method 1
a covering layer made of a titanium fire-resistant material is produced by additive manufacturing on the shell
Implementation Method 2
after the additive manufacturing step, the metal component is heat treated at a temperature of between 200° C. and 1000° C.
Data Source
AI summary
A method for manufacturing a metal component includes the following steps: a shell made of a titanium-based material is provided, the shell having a first surface and a second surface remote from the first surface; a covering layer made of a titanium fire-resistant material is produced by additive manufacturing on the shell such that the covering layer at least partially covers the first surface and/or the second surface; and, after the additive manufacturing step, the metal component is heat treated at a temperature of between 200° C. and 1000° C.