Metal Strip Rolling Control Using Online Microstructure Measurement
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Solution Overview
Problem
Current methods for manufacturing high-quality metal strips struggle to maintain mechanical properties due to indirect correlations between manufacturing parameters and microstructure, leading to deviations in quality, such as brittleness or softness, especially in two-phase steel production.
Innovation Solution
Implementing online measurements using X-ray diffraction, magnetic qualities, or laser ultrasound to monitor microstructural properties during the manufacturing process, allowing for real-time adjustment of rolling and heat treatment parameters to ensure adherence to desired mechanical qualities, thereby stabilizing the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If online measurements of microstructure are implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical microstructure analysis systems with non-contact measurement methods such as X-ray diffraction, magnetic measurements, or laser ultrasound. These methods use physical fields (electromagnetic, acoustic) instead of mechanical contact to detect microstructural properties, thereby improving measurement capability while avoiding the complexity of mechanical measurement systems.
Solution Approach 2:
The patent introduces intermediary measurement techniques that indirectly detect microstructure through measurable physical properties. Instead of directly observing microstructure, the system uses X-ray diffraction patterns, magnetic responses, or acoustic wave propagation as intermediaries to infer microstructural characteristics, simplifying the measurement approach while maintaining precision.
2Reliability
If real-time measurement and adjustment is implemented, then reliability is improved, but loss of time increases
Solution Approach 1:
The patent implements continuous online measurement during the manufacturing process rather than intermittent or post-process measurement. The measurement system operates continuously alongside production, enabling real-time detection of microstructure deviations and immediate adjustment, thereby maintaining reliability without significant time loss.
Solution Approach 2:
The patent performs measurement at an early stage in the manufacturing process (during or immediately after the relevant manufacturing step) rather than after completion. This preliminary measurement allows for immediate correction before subsequent processing steps, preventing quality deviations from propagating and reducing the need for rework or rejection.
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 precise control and regulation of the manufacturing process, improving the final quality of metal strips by directly correlating microstructure with mechanical properties, reducing rejection costs and optimizing production efficiency without requiring extensive computer model development or prior process data.
Implementation Method 1
measuring of the value of a material quality of the product at the second position, wherein the material quality reproduces the microstructure of the product material... The determining of the quality of the product material can take place by the irradiating of the product with X-ray radiation and the determining of the diffraction of the X-ray radiation (X-ray diffraction) on the crystalline structure of the product material
Implementation Method 2
Online measurements can also be carried out which detect qualities of the strip which are determined by the microstructure of the material... As an alternative, it can be provided that the measuring according to the above step a) is or comprises the measuring of magnetic qualities of the product material
Implementation Method 3
Furthermore, it can be alternatively provided that the measuring according to the above step a) is or comprises a laser ultrasound measuring of the product material
Data Source
AI summary
The invention relates to a method for rolling a metal product (1), wherein the metal product is subjected to a rolling operation at a first station (2), which rolling operation is controlled by a control device (3), wherein the product (1) is subject to a measurement at a second station (4), wherein the product (1) is subjected to a further processing operation at a third station (6), and wherein the product (1) is in a specified quality at a fourth station (7). In order to increase the quality of the produced strip, the invention provides that the method has the following steps: a) measuring the value of a material property (IW) that the second station (4); b) feeding the value measured at the second station (4) to the control device (3), comparing the measured value with a value (SW) stored in the control device (3), and adjusting a parameter (PPI) if the measured value deviates from the stored value (SW), e) measuring a value of a quality material property (Q) at the fourth station (7); d) comparing the measured value with a stored value, and initiating a measure to influence the quality material property (Q) if the measured value deviates from the stored value beyond a permissible tolerance.