Anisotropic Transition Layer in Rolled Composite Board Bonding
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Solution Overview
Problem
Existing multilayer rolled clad plates face issues with oxide formation and element diffusion during production, leading to weakened bonding interfaces and compromised mechanical properties due to the influence of production environment and equipment limitations.
Innovation Solution
Incorporating an anisotropic thin steel plate as a transition layer between cladding layers, with controlled orientation degree (1.25≥AI≥1.05) to hinder component diffusion and enhance adhesion, using a manufacturing process involving heating, rolling, and controlled cooling to ensure metallurgical bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hot rolling and cladding is performed to produce multilayer rolled clad plates, then bonding between metal layers is achieved, but oxide formation and element diffusion occur at the bonding interface, compromising mechanical properties
Solution Approach 1:
An intermediate layer is introduced between the first and second cladding layers to act as a barrier against element diffusion and oxide formation. This intermediate layer prevents direct contact between the cladding layers during hot rolling, thereby eliminating the harmful effects of interfacial oxidation and element diffusion while maintaining metallurgical bonding through controlled heating and rolling processes.
2Reliability
If cladding layers are bonded through hot rolling, then metallurgical bonding is achieved, but severe element diffusion occurs leading to decreased strength and toughness
Solution Approach 1:
The intermediate layer serves as a diffusion barrier that allows metallurgical bonding to occur through controlled heating while preventing severe element diffusion between cladding layers. The intermediate layer maintains the integrity and mechanical properties of the cladding layers by blocking the diffusion path for carbon and other alloying elements during the hot rolling process.
3Productivity
If conventional hot rolling is used for cladding, then production capacity is maintained, but equipment limitations and production environment cause bonding defects
Solution Approach 1:
The cladding structure is segmented into multiple layers including the first cladding layer, intermediate layer, and second cladding layer. This segmentation allows each layer to be optimized independently and provides a built-in mechanism to prevent bonding defects caused by equipment limitations and production environment variations, while maintaining overall production capacity through efficient hot rolling 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
The solution enables production of multilayer rolled clad plates with varied mechanical strengths from 100 MPa to 1700 MPa, providing enhanced bonding and specific mechanical properties through reduced element diffusion and improved adhesion.
Implementation Method 1
it is also easy to diffuse elements in the process of hot rolling and cladding
Implementation Method 2
the transition layer is an anisotropic thin steel plate
Implementation Method 3
utilizing shear force generated by rolling under high temperature and large deformation to destroy the surface layer of the metal contact surface
Implementation Method 4
Roll cladding is a special rolling method performed by contacting two or more metal plates with clean surfaces, and utilizing shear force generated by rolling under high temperature
Data Source
AI summary
Disclosed is a multi-layer rolled composite board, comprising a transition layer provided between two adjacent composite layers, wherein the transition layer is an anisotropic steel sheet. Also disclosed is a manufacturing method for the multi-layer rolled composite board. The multi-layer rolled composite board of the present invention can be greatly transformed according to different compositions and processes so as to achieve different strength grades ranging from 150 MPa to 1700 MPa, thereby providing the basis for different specific mechanical properties for the whole steel sheet.