Conveners
Quality Control & Inspection
- Alessandra Saleri (Forge Fedriga srl)
Quality Control & Inspection
- Giordano Streghi Montauti
Description
3.1.4
This study introduces an innovative method for estimating accumulated strain and recrystallized fraction in steel using the existing online laser ultrasonic (LUS) grain size gauge [1]. This method extends the capability of the grain size gauge by extracting more information from the same measurement. The method leverages the detection of shear wave splits, observed as small shear-wave echoes...
In the steel industry, the rapid cooling process, which is suitable for manufacturing high-strength materials, is being increasingly applied. However, the deformation caused by rapid cooling is particularly large, which leads to reduced productivity and yield, so suppressing this deformation is an important issue. In order to suppress deformation, it is first necessary to quantitatively...
During the continuous hot-dip galvanizing process, numerous parameters directly correlate with the surface quality of steel plates. Among these factors, the emission management of floating oxides on the zinc bath surface within the snout represents a critical operational parameter for maintaining continuous production efficiency. To address this challenge, various steel manufacturing companies...
In a collaborative initiative, an innovative Laser UltraSonic (LUS) device was installed at the SSAB Hot Strip Mill in Borlänge. This measuring device, along with the software for signal processing and evaluation, was developed, constructed, and implemented through a partnership involving SSAB, SWERIM, EMG, and the SMS group. Positioned after the last rolling stand in the finishing mill, the...
This paper presents an advanced robotic system designed to automate key quality control and marking processes for plates exiting the rolling mill. The solution integrates shaping automation (contour and flatness control), defect detection, thickness measurement, ink marking, and stamp marking, ensuring high precision and efficiency.
An advanced vision system enables real-time conformity...
The real-time grain size measurement has recently been realized by laser ultrasonics in the hot-rolling process [1]. This enables quality control, the possibility of direct feedback to the process control system, as well as feedback to the set-up calculation which is performed before each transfer bar is sent through the finishing mill to be rolled. The gauge provides novel insights into how...
The mechanical properties are the most basic quality of the hot strip products. Normally, the mechanical properties are gained with the design of chemical composition and the control of the process factors such as finish rolling delivery temperature (FDT), strip speed, cooling rate, coiling temperature (CT), and so on. These factors are not dynamically adjusted in the conventional system, and...
The TST.1 is a practical, simple, non-contact series of systems for continuous, online monitoring of surface contamination loads on moving metal sheet. Designed for real-time process control, the system assesses surface cleanliness before and after cleaning sections in metallic coating and continuous annealing sheet finishing lines, enabling producers to optimize incoming cold-rolled steel...
Metal microstructure can be determined in situ using laser ultrasound (LUS) measurements. As a non-contact, nondestructive measurement, this can be integrated at many positions in the steelmaking process, including measurement of hot and moving samples. Swerim has previously demonstrated the application of this technology as an on-line grain size gauge installed at the SSAB Borlänge hot strip...
The magnetic flatness measurement system enables precise flatness assessment of strip steel, even under high tension, where traditional optical methods fail due to elastic elongation. Unlike conventional flatness measuring rollers, which are costly and offer limited resolution, this system applies a uniform electromagnetic force perpendicular to the strip, inducing a controlled deflection that...
Steel production necessitates continuous quality monitoring throughout the process. Historically, the steel industry has lagged in adopting certain technological advancements due to its harsh production environment, resulting in lower efficiency and higher risks for workers who perform many operations manually. This study shows the latest developments in the long products quality control, with...