Aluminum-Based Plating Blank Joint Control for Low-Segregation Bonding
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Solution Overview
Problem
Existing methods for manufacturing tailor welded blanks (TWBs) using aluminum-silicon (Al—Si) or zinc (Zn) plating layers result in decreased mechanical properties due to plating layer dissolution during laser bonding, leading to segregation and strength deterioration at the joint.
Innovation Solution
An aluminum-based plating blank is developed with a joint containing an average aluminum content of 0 wt % or more and less than 0.5 wt %, and a standard deviation of 0 or more and 0.45 or less, formed by aligning plated steel plates with a base steel and a plating layer of 20 to 100 g/m², and bonded using thermal treatment to prevent segregation and maintain mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser bonding is used to join plated steel plates, then bonding speed and productivity are improved, but plating layer dissolution occurs causing segregation and strength deterioration
Solution Approach 1:
The patent changes the bonding method from laser bonding to thermal treatment bonding, altering the physical and chemical parameters of the bonding process. This prevents plating layer dissolution while maintaining bonding effectiveness, resolving the contradiction between bonding speed and joint strength.
Solution Approach 2:
The patent replaces the laser bonding system with a thermal treatment bonding system. This substitution eliminates the harmful laser-induced plating layer dissolution while achieving effective bonding, thus maintaining productivity while improving joint strength.
2Reliability
If aluminum-silicon or zinc plating layers are used, then corrosion resistance is improved, but mechanical properties decrease due to plating layer dissolution during bonding
Solution Approach 1:
The patent introduces a controlled aluminum content (0-0.5 wt%) as an intermediary element in the joint composition. This prevents harmful plating layer dissolution while maintaining corrosion resistance, resolving the contradiction between reliability and mechanical properties.
Solution Approach 2:
The patent changes the bonding process parameters from laser-based to thermal treatment-based, which fundamentally alters how the plating layer interacts with the base metal during bonding. This prevents the dissolution issue while preserving the protective function of the plating layer.
3Strength
If high aluminum content is present in the joint, then adhesion is improved, but segregation occurs causing non-uniform properties
Solution Approach 1:
The patent precisely controls the aluminum content parameter in the joint to be 0-0.5 wt%, which is sufficient for adhesion but low enough to prevent segregation. This parameter optimization resolves the contradiction between adhesion and composition uniformity.
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 solution effectively reduces hardness deterioration, prevents joint defects, and maintains mechanical properties by minimizing aluminum segregation, ensuring consistent strength and performance in hot stamping processes.
Implementation Method 1
bonded using thermal treatment to prevent segregation and maintain mechanical properties
Data Source
AI summary
An embodiment of the present disclosure discloses an aluminum-based plating blank including a first plated steel plate, a second plated steel plate connected to the first plated steel plate, and a joint located between the first plated steel plate and the second plated steel plate and connecting the first plated steel plate to the second plated steel plate.