Ferrochrome-Modified Titanium Alloy Manufacturing for Strength and Cost
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Solution Overview
Problem
There is a need for a titanium alloy that offers high strength and good elongation while minimizing cost, as existing methods for enhancing titanium's strength often increase the price due to the addition of expensive alloy elements.
Innovation Solution
A method for preparing a high-strength titanium alloy by adding ferrochrome, which includes chromium, iron, silicon, and carbon, to pure titanium, followed by melting, cooling, and hot forming, with the ferrochrome added in an amount equal to or less than 4% by weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If expensive alloy elements are added to pure titanium to increase strength, then the tensile strength improves, but the production cost increases significantly
Solution Approach 1:
The patent combines multiple alloying elements (chromium, iron, silicon, carbon) into a single compound form (ferrochrome) for addition to pure titanium. This merging approach achieves the desired strength improvement through controlled composition (0.1-3.0% Cr, 0.1-1.0% Fe, 0.01-0.1% Si) while reducing production cost by using a single additive source instead of multiple separate expensive alloy elements
Solution Approach 2:
The patent optimizes the composition parameters of ferrochrome (specifically Cr: 20-35%, Fe: 1-4%, Si: 0.1-0.5%, C: ≤0.15%) and the addition amount (0.01-4.0% by weight relative to titanium) to achieve the optimal balance between strength and cost. By controlling these parameters, the resulting titanium alloy achieves tensile strength of 861-1165 MPa with good elongation while minimizing cost increase
2Strength
If alloy elements are added to pure titanium to enhance strength, then the mechanical properties improve, but the elongation may deteriorate
Solution Approach 1:
The patent applies local quality by creating a specific composition distribution within the titanium alloy matrix. The controlled addition of ferrochrome (0.01-4.0% by weight) ensures that alloying elements are distributed uniformly at optimal concentrations (Cr: 0.1-3.0%, Fe: 0.1-1.0%, Si: 0.01-0.1%), which locally strengthens the matrix while maintaining overall ductility and elongation properties
Solution Approach 2:
The patent creates a composite material system by combining pure titanium with ferrochrome-containing alloying elements. This composite approach (titanium matrix with dispersed Cr, Fe, Si, and C) achieves synergistic effects where the alloying elements strengthen the matrix through solid solution strengthening and precipitation hardening, while the controlled composition maintains good elongation (tensile strength: 861-1165 MPa with corresponding elongation)
Solution Approach 3:
The patent optimizes composition parameters to balance strength and elongation. By controlling ferrochrome addition (0.01-4.0% by weight) and specifying element ranges (Cr: 0.1-3.0%, Fe: 0.1-1.0%, Si: 0.01-0.1%, C: ≤0.15%), the material achieves optimal mechanical properties with tensile strength of 861-1165 MPa and good elongation, avoiding the trade-off that typically occurs with higher alloy content
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 resulting titanium alloy achieves a tensile strength range of 861 to 1165 MPa and a yield strength range of 460 to 1280 MPa, while maintaining good elongation and reducing production costs.
Implementation Method 1
melting a result of the (a) and then cooling the result to form a titanium alloy base material
Implementation Method 2
hot forming the titanium alloy base material
Data Source
AI summary
A method for manufacturing a high-strength titanium alloy by using ferrochrome, and a high-strength titanium alloy are disclosed. The method for manufacturing a high-strength titanium alloy, according to the present invention, comprises the steps of adding ferrochrome, which comprises Cr, Fe, Si and C, to pure Ti, melting and cooling same so as to form a titanium alloy base material, and then hot forming the formed titanium alloy base material. The ferrochrome is added in an amount of less than 4 wt %.