Sintered Titanium Baffles with Elevated Oxygen for Creep Resistance
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Solution Overview
Problem
Conventional methods for manufacturing suppressor baffles, such as machining and casting, are inefficient in terms of material usage and introduce voids, which can lead to performance issues at high temperatures and wear resistance, increasing costs and reducing the lifespan of the suppressor.
Innovation Solution
The use of powder metallurgy methods, specifically preparing titanium alloy powders with elevated oxygen and silicon content, forming them into green shapes, and sintering to create baffles with improved high-temperature strength and creep resistance, while reducing material waste and machining time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If machining is used to form thin-walled cone baffles, then manufacturing precision can be achieved, but material waste exceeds 90% and manufacturing cost increases
Solution Approach 1:
The invention changes the manufacturing process parameters from conventional machining to powder metallurgy forming. By controlling powder composition (adding oxygen and silicon), compaction pressure, and sintering temperature, the process achieves near-net-shape formation of baffles with minimal material waste while maintaining required geometric precision and mechanical properties
Solution Approach 2:
The invention performs preliminary alloying during powder preparation by adding oxygen and silicon to the titanium powder mixture before compaction. This preliminary action ensures the correct chemical composition is established before forming, eliminating the need for subsequent material removal or extensive machining operations
2Loss of substance
If casting is used to form near-net articles, then material usage efficiency improves, but voids are introduced that cause problems in machining and welding
Solution Approach 1:
The invention replaces the casting process (which relies on liquid metal solidification) with a powder metallurgy process. This substitution eliminates the formation of casting voids by using compacted and sintered powder particles that fuse into a dense, void-free structure, while maintaining near-net-shape forming capabilities and material integrity for subsequent machining and welding operations
3Strength
If conventional titanium alloys are used for baffles, then basic mechanical properties are achieved, but high-temperature strength and creep resistance are insufficient
Solution Approach 1:
The invention changes the chemical composition parameters of the titanium alloy by adding oxygen (0.05-0.5 wt%) and silicon (0.05-0.5 wt%). These compositional changes create a material that maintains adequate room temperature strength while significantly improving high-temperature strength and creep resistance, as the oxygen and silicon form strengthening phases and improve microstructural stability at elevated temperatures
4Stability of the object's composition
If high ductility is prioritized in baffle material, then formability improves, but strength and creep resistance decrease
Solution Approach 1:
The invention optimizes the chemical composition parameters by adding controlled amounts of oxygen and silicon to the titanium alloy. This compositional adjustment creates a balance where the material achieves sufficient ductility for forming operations while simultaneously gaining enhanced high-temperature strength and creep resistance through the formation of strengthening phases and improved microstructural stability
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 approach significantly reduces material waste, enhances high-temperature performance, and improves wear resistance, leading to cost-effective and durable suppressor baffles with extended lifespan.
Implementation Method 1
forming of the powder system into a green shape, optionally green machining the green shape, and sintering the green shape to create a firearm suppressor baffle formed from sintered material
Data Source
AI summary
A method of forming a firearm suppressor baffle including preparing a titanium alloy powder system, forming of the powder system into a green shape, optionally green machining the green shape, sintering the green shape to create a firearm suppressor baffle formed from sintered material, where the firearm suppressor baffle has an elevated oxygen content of between 0.2 and 0.5 weight percent. The resultant sintered material may have a creep value of less than 1.5% at 50 hours at 450 C. Also, a method of forming a firearm suppressor baffle including preparing a titanium aluminide powder system, forming the titanium aluminide powder system into a green shape through one of compaction and powder metal injection molding, and sintering the green shape to create the firearm suppressor baffle. The titanium aluminide powder method may also include deoxygenating the firearm suppressor baffle. Also disclosed are baffles and suppressors formed using these methods.