Vacuum-Sealed Titanium Encapsulation for Oxidation-Free Hot Working
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high cost and complex production processes of titanium products, including expensive titanium powders and oxidation issues, limit their use in land transport equipment, and existing methods for reducing production costs often result in products with discolored appearance and low tensile properties.
Innovation Solution
A method involving a titanium-containing structure with a commercially pure titanium package and a filler of titanium sponge, briquet, or scrap, sealed to maintain low internal pressure and prevent oxidation, allowing for hot working without melting or forging steps, thereby reducing production costs and improving tensile properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional production steps (melting, forging, hot working, cold working) are used to produce titanium products, then the products have good mechanical properties and corrosion resistance, but the production cost is very high and productivity is low
Solution Approach 1:
The invention applies preliminary action by performing vacuum sealing and evacuation before hot working. The titanium sponge is sealed in a package and the internal pressure is reduced to prevent oxidation during heating, eliminating the need for subsequent protective measures and enabling direct hot working without additional processing steps.
Solution Approach 2:
The invention creates an inert environment by evacuating the package to reduce internal pressure to 10 Pa or less before hot working. This vacuum environment prevents oxidation of titanium sponge during heating, eliminating the need for protective atmospheres or coatings while maintaining material purity and mechanical properties.
2Ease of manufacture
If titanium sponge is heated in atmospheric pressure to eliminate melting and forging steps, then production cost is reduced, but the titanium sponge surface oxidizes causing discolored appearance and low tensile properties
Solution Approach 1:
The invention creates an inert environment by evacuating the package to reduce internal pressure to 10 Pa or less before hot working. This vacuum environment prevents oxidation of titanium sponge during heating, eliminating the need for protective atmospheres or coatings while maintaining material purity and mechanical properties.
Solution Approach 2:
The invention applies preliminary action by performing vacuum sealing and evacuation before hot working. The titanium sponge is sealed in a package and the internal pressure is reduced to prevent oxidation during heating, eliminating the need for subsequent protective measures and enabling direct hot working without additional processing steps.
3Object-affected harmful factors
If pack rolling with carbon steel cover members is used to protect core material during hot rolling, then surface oxidation is prevented, but the cover members must be removed and disposed of increasing production cost
Solution Approach 1:
The invention creates an inert environment by evacuating the package to reduce internal pressure to 10 Pa or less before hot working. This vacuum environment prevents oxidation of titanium sponge during heating, eliminating the need for protective atmospheres or coatings while maintaining material purity and mechanical properties.
Solution Approach 2:
The titanium package serves dual functions: it protects the titanium sponge during hot working and becomes part of the final product. The package material is selected to be compatible with titanium, eliminating the need for removal and disposal of cover members, and the package structure is maintained or integrated into the finished product.
4Device complexity
If titanium powder is used with binding agents and plasticizers to eliminate melting and forging steps, then production steps are reduced, but the products are very expensive
Solution Approach 1:
The invention extracts and eliminates unnecessary components by using titanium sponge instead of titanium powder with binding agents and plasticizers. This removes the need for drying, sintering, compaction, and re-sintering steps, directly reducing both process complexity and production cost while maintaining product quality.
Solution Approach 2:
The invention uses titanium sponge as a disposable starting material that is directly hot worked to form the final product shape. The sponge structure is consumed during hot working to create the desired titanium product, eliminating the need for expensive binders and multiple processing steps required when using titanium powder.
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 production costs and energy consumption while achieving titanium products with tensile properties comparable to conventionally produced ones, minimizing voids and oxidation, and enabling the use of titanium in land transport equipment.
Implementation Method 1
sealed to maintain low internal pressure and prevent oxidation
Implementation Method 2
allowing for hot working without melting or forging steps
Data Source
Figure 1~3
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 briquet, 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.