Vacuum-Packed Titanium Structure for Melt-Free Hot Working
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Solution Overview
Problem
The high production costs and complex processes associated with titanium products, such as titanium plates and round bars, limit their utilization in land transport equipment due to expensive materials and steps like melting and forging, which result in discolored appearance and low tensile properties.
Innovation Solution
A titanium-containing structure is developed using a commercially pure titanium package and filler, such as titanium sponge or scrap, with controlled internal pressure and chemical composition, eliminating the melting and forging steps by hot working the filler within the package, allowing for the retention of the package as part of the product and reducing oxidation and voids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional melting and forging steps are used to produce titanium products, then the tensile properties and appearance quality are improved, but the production cost and process complexity increase significantly
Solution Approach 1:
The invention extracts and eliminates the melting and forging steps from the conventional titanium production process. By directly hot-working titanium sponge without melting, the process complexity is reduced while maintaining acceptable tensile properties through controlled hot working parameters and subsequent heat treatment
Solution Approach 2:
The invention changes the processing parameters by hot-working titanium sponge at specific temperature ranges (900-1200°C) and applying controlled reduction ratios. These parameter changes enable direct transformation of sponge to finished product with acceptable mechanical properties, eliminating the need for melting and forging
2Ease of manufacture
If melting and forging steps are eliminated to reduce production cost, then the production cost and energy consumption decrease, but the tensile properties and appearance quality may deteriorate
Solution Approach 1:
The invention performs preliminary hot working of titanium sponge to create a controlled microstructure before final product formation. This preliminary action of hot working at specific temperatures and reduction ratios prepares the material to achieve acceptable tensile properties without requiring subsequent melting and forging
Solution Approach 2:
The invention applies specific processing parameters including hot working temperature (900-1200°C), reduction ratio (70-90%), and heat treatment conditions to transform titanium sponge directly into finished products with acceptable tensile properties, eliminating costly melting and forging steps
3Productivity
If titanium sponge is directly hot-worked without melting, then the production time and energy consumption are reduced, but oxidation and void formation may increase
Solution Approach 1:
The invention performs hot working of titanium sponge in an inert or vacuum atmosphere to prevent oxidation of the titanium material during the high-temperature processing. This controlled environment eliminates oxygen contact while maintaining the productivity benefits of direct hot working without melting
Solution Approach 2:
The invention applies preliminary consolidation of titanium sponge at lower temperatures or with preliminary hot working to reduce void content before final hot working. This preliminary action densifies the sponge structure, minimizing void formation during subsequent high-temperature processing
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 reduces production costs and energy consumption, improves yield, and produces titanium products with tensile properties comparable to conventional methods while minimizing voids and oxidation, making them suitable for use in land transport equipment.
Implementation Method 1
hot working the filler within the package
Implementation Method 2
hot working the filler within the package, allowing for the retention of the package as part of the product
Implementation Method 3
reducing oxidation and voids
Implementation Method 4
an internal pressure of the package is 10 Pa or less, the pressure being an absolute pressure
Implementation Method 5
an internal pressure of the package is 10 Pa or less, the pressure being an absolute pressure
Data Source
AI summary
A titanium-containing structure made of a titanium material includes: a package made of a commercially pure titanium material; and a filler packed into the package, wherein an internal pressure of the package is 10 Pa or less, the pressure being an absolute pressure, and wherein the filler includes at least one selected from titanium sponge, titanium briquette, and titanium scrap, and the filler has the same type of a chemical composition of the commercially pure titanium material. This titanium-containing structure enables production of a titanium product by performing hot working and eliminating the conventional melting step and forging step.