Transition Slab Processing for Variable Chemistry Control
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Solution Overview
Problem
Metallic transition slabs or billets with non-uniform chemical analysis due to process errors result in unpredictable mechanical properties, making further processing into usable machine components impossible.
Innovation Solution
A method that processes metallic transition slabs or billets with locally variable chemical analysis into intermediate or finished products with target mechanical properties by determining and adjusting heating, forming, and cooling processes using a higher-level control system, incorporating spectral analysis, forming simulations, and material flow models to ensure mechanical properties fall within a usable target corridor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant process parameters are used during further processing of transition slabs or billets, then the processing is simple and efficient, but the mechanical properties of the finished product become non-uniform and unpredictable
Solution Approach 1:
The patent applies dynamic process parameters that vary along the length of the transition slab or billet. The heating temperature, holding time, and cooling rate are adjusted as functions of position to compensate for the non-uniform chemical composition. This dynamic approach ensures that each region with different alloy content receives optimized processing parameters, resulting in uniform mechanical properties throughout the finished product while maintaining processing efficiency through automated control.
2Reliability
If the local chemical analysis is determined and processed with variable parameters, then the mechanical properties can be controlled within a target corridor, but the device complexity and measurement requirements increase
Solution Approach 1:
The patent determines the local chemical analysis of the transition slab or billet before the forming process begins. By knowing the chemical composition distribution in advance, the control system can pre-calculate the optimal variable process parameters for heating, holding, and cooling. This preliminary action allows the complex control to be performed offline or in advance, reducing the real-time control complexity while ensuring reliable mechanical property control.
Solution Approach 2:
The patent implements a feedback control system where the measured or calculated local chemical analysis is used to adjust the process parameters. The control system continuously monitors the position and composition, and automatically adjusts heating temperature, holding time, and cooling rate to maintain mechanical properties within the target corridor. This closed-loop feedback reduces the perceived complexity by automating the adjustment process.
3Loss of substance
If transition slabs or billets with non-uniform chemical analysis are processed, then material utilization is improved, but the mechanical properties become unpredictable and scrap increases
Solution Approach 1:
The patent applies the principle of local quality by tailoring the processing parameters to the local chemical composition of each region of the transition slab or billet. Different sections with different alloy contents receive different heating temperatures, holding times, and cooling rates. This localized processing ensures that each region develops the desired mechanical properties appropriate to its composition, enabling full utilization of the non-uniform material without increasing scrap, as the variability in composition is converted into an opportunity for customized local treatment.
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
Enables the production of usable components by ensuring mechanical properties are within a predetermined range, reducing scrap and improving processing efficiency by dynamically adjusting process parameters based on local chemical analysis and structural models.
Implementation Method 1
heating and/or holding the transition slab or billet at a target temperature
Implementation Method 2
cooling the intermediate or finished product
Implementation Method 3
a measurement of the chemical analysis by spectral analysis on the surface of the slab or billet
Data Source
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AI summary
The invention relates to a method for processing transition slabs or transition billets with a locally variable chemical analysis. By variably adapting the process target values in a controlled manner with respect to the local chemical analysis, a mechanical property is set in a target range, said mechanical property allowing further usage and preventing scrapping.