Titanium Hot-Rolling Material With Welded Sheets for Surface Quality
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Solution Overview
Problem
Existing methods for producing titanium materials for hot rolling without a slabbing process often result in surface defects due to deformation anisotropy caused by coarse grains, leading to increased costs and reduced yield, as they require additional finishing processes to rectify these defects.
Innovation Solution
Attaching titanium sheets with fine grains to the surface of titanium cast pieces, ensuring they have the same chemical composition, and welding them in a vacuum to create a microstructure that refines the grains and reduces deformation anisotropy, thereby eliminating surface defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a slabbing process is omitted and hot rolling is performed directly on a cast ingot, then production efficiency is improved and costs are reduced, but surface defects occur due to deformation anisotropy of coarse grains
Solution Approach 1:
The invention applies preliminary ultrasonic vibration treatment to the cast ingot before hot rolling. This preliminary action refines the coarse grain structure and reduces deformation anisotropy in advance, preventing surface defects during subsequent hot rolling without requiring a slabbing process, thus maintaining both high productivity and surface quality
Solution Approach 2:
The invention utilizes ultrasonic vibration to mechanically agitate the metal structure of the cast ingot. The high-frequency vibration breaks up coarse grains and promotes more uniform grain distribution, reducing the anisotropy that causes surface defects during hot rolling while eliminating the need for additional processing steps
2Manufacturing precision
If a slabbing process is performed to refine grains and improve surface quality, then surface defects are reduced, but production time increases and production efficiency decreases
Solution Approach 1:
The invention extracts and removes the problematic coarse grain structure from the cast ingot using ultrasonic vibration treatment. By selectively breaking up and redistributing the coarse grains before hot rolling, the method achieves surface quality improvement without requiring the time-consuming slabbing process, thus maintaining high production efficiency
Solution Approach 2:
The invention replaces the mechanical slabbing process with ultrasonic vibration treatment. Instead of physically cutting and reformatting the ingot through slabbing, the ultrasonic method uses high-frequency mechanical vibrations to achieve grain refinement and uniformity distribution, achieving the same quality improvement in less time
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 enables titanium products with surface properties equivalent to those produced with a slabbing process, reducing production costs and enhancing energy efficiency by minimizing the need for additional processing steps and improving surface quality.
Implementation Method 1
a surface treatment section (13), configured to subject a surface of the titanium cast piece (3) to ultrasonic vibration
Implementation Method 2
a titanium sheet welded to a face corresponding to a rolling surface of the titanium cast piece
Data Source
AI summary
A titanium material for hot rolling 1 includes a titanium cast piece 3, and titanium sheets 4 that are welded to faces corresponding to rolling surfaces 3a of the titanium cast piece 3. The titanium cast piece 3 and the titanium sheets 4 have the same kind of chemical composition. The titanium material for hot rolling 1 can maintain good surface properties after hot rolling even if a slabbing process or a finishing process is omitted.