Microstructural Modelling Applied to the Design and Control of the Steel Plate Rolling Process

2012 ◽  
Vol 715-716 ◽  
pp. 529-541
Author(s):  
R. Doell ◽  
Joseph Lee ◽  
A. Harvey ◽  
M. Steeper
Keyword(s):  
Mechanical Properties ◽  
Grain Growth ◽  
Steel Plate ◽  
Rolling Process ◽  
Metallurgical Process ◽  
Plate Rolling ◽  
On Line ◽  
Microstructural Modelling ◽  
And Control

Modern steel plate manufacture relies on the manipulation of recrystallisation and grain growth in order to obtain maximised and precise mechanical properties from low-alloyed feedstock. The models that describe this metallurgical process nowadays inform the design of the plant itself. They are also capable of application to the on-line control of rolling, as well as to several of the ancillary mill operations.

The Laser Thickness Measurement System Applied in Steel Rolling

2013 ◽  
Vol 718-720 ◽  
pp. 725-732
Author(s):  
Kuang I Chang ◽  
Weber Yi Yuan Lin ◽  
Bor Nian Chuang ◽  
Kuang Fu Huang
Keyword(s):  
Steel Plate ◽  
System Development ◽  
Plate Thickness ◽  
Measurement Data ◽  
Integrated Design ◽  
Rolling Process ◽  
Thickness Measurement ◽  
Thickness Gauge ◽  
Steel Rolling ◽  
Plate Rolling

This paper mainly describes application of non-contact laser thickness gauge in steel plate rolling process, including workstation site thickness measurement, data collection, information analysis and integration with ERP system, as well as problems may arise during applications and sustainable development in the future. Through the system development to realize traditional steel plate rolling industry information planning, paperless operations, increase work efficiency, enhance product quality and zero defective products. Integrated design of steel plate thickness measurement and tachometer, to understand the pros and cons of output products right after steel plate rolling, and do product level classification immediately to assist enterprises to save manpower, time and loss cost of export defective products to the market, and eventually increase products competition and profits.

scholarly journals Development of Intermediate Cooling Technology and Its Control for Two-Stand Plate Rolling

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Fei Zhang ◽  
Wei Yu ◽  
Tao Liu
Keyword(s):  
Steel Plate ◽  
Cooling System ◽  
Chromatic Aberration ◽  
Rolling Process ◽  
Controlled Rolling ◽  
Plate Surface ◽  
Plate Rolling ◽  
Intermediate Cooling ◽  
Rolling Efficiency ◽  
The Impact

In a plate rolling production line, thermomechanically controlled processing is critical for plate quality. In this paper, a set of intermediate cooling equipment of a two-stand plate mill with super density nozzles, medium pressure, and small flow is developed. Based on a simplified dynamic model, a cooling control scheme with combined feedforward, feedback, and adaptive algorithms is put forward. The new controlled rolling process and the highly efficient control system improve the controlled rolling efficiency by an average of 17.66%. The proposed intermediate cooling system can also effectively inhibit the growth of austenite grain, improve the impact toughness and yield strength of Q345B steel plate, reduce the formation of secondary oxide scale on the plate surface and the chromatic aberration of the plate surface, and greatly improve the surface quality of the steel plate.

Thicker steel plate shape-changing law and control method during the snake rolling process

2016 ◽  
Vol 113 (3) ◽  
pp. 309 ◽  
Author(s):  
Lian-Yun Jiang ◽  
Chun-Jiang Zhao ◽  
Guo Yuan ◽  
Jian-Hui Shi ◽  
Guo-Dong Wang
Keyword(s):  
Steel Plate ◽  
Control Method ◽  
Rolling Process ◽  
Plate Shape ◽  
And Control

Application of Machine Vision Technique in Plate Camber Control System

2010 ◽  
Vol 139-141 ◽  
pp. 2082-2086 ◽  
Author(s):  
Chun Yu He ◽  
Zhi Jie Jiao ◽  
Di Wu
Keyword(s):  
Control System ◽  
Steel Plates ◽  
Measurement And Control System ◽  
Plate Rolling ◽  
Curvature Measurement ◽  
Line Measurement ◽  
Edge Location ◽  
On Line ◽  
And Control ◽  
Measurement And Control

In plate rolling, the existence of some asymmetry rolling conditions, affects the distribution of transversal thickness of rolling pieces, leading to the occurrence of camber phenomenon, which in turn seriously affect the product's material yield. In this paper, based on the images of plates in the production line collected by camera, taking into account the requirements for on-line measurement, filtering noise from image information, use edge detection operator, Hough transform methods and sub pixel edge location method to identify the steel plates, have achieved in-line measurement of camber curvature of plate side. At the same time, combined with camber control model, we have developed camber curvature measurement and control system, realized the automatic correction control of camber curvature of rolling pieces in the production process. Field applications show that this method can reduce the human intervention, will limit the camber curvature of rolling pieces within a certain range, which has great significance for improving the product’s yield.

Influence of Heat Treatment on Mechanical Properties and Microstructure of Mining Machinery Steel Plate Containing Molybdenum and Niobium

2012 ◽  
Vol 602-604 ◽  
pp. 342-346
Author(s):  
Xian Jun Wang ◽  
Qing Feng Ding ◽  
Wen Bin Liu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Impact Toughness ◽  
Hot Rolling ◽  
Steel Plate ◽  
Rolling Process ◽  
Rolled Plate ◽  
Rolled Steel ◽  
Hot Rolling Process ◽  
Mining Machinery

Influence of different heat treatment on microstructure and mechanical properties of mining machinery steel Plate containing molybdenum niobium was investigated. As-rolled steel plate was processed by normalizing and normalization-tempering respectively. Mechanical properties of as-rolled steel plate, normalizing steel plate and normalizing-tempering steel plate and their microstructures was made a contrast. The experiment result showed that formation of coarse ferrite grain in as-rolled state leads to lower impact toughness. Normalizing treatment can refine coarse ferrite formed in hot rolling process but formation of carbon oversaturation induced new dislocation and distortion. Processing of proper normalizing-tempering can eliminate coarse ferrite in as-rolled state and relieve new dislocation and distortion formed in normalizing process, and therefore made the mechanical properties of the as-rolled plate be the best state.

Gap Setting Model and Application in Plate Rolling Process

2010 ◽  
Vol 139-141 ◽  
pp. 584-588
Author(s):  
Zhong Zhao ◽  
Chun Li Jia ◽  
Xian Lei Hu ◽  
Guo Dong Wang ◽  
Zhen Hua Zhu
Keyword(s):  
Thermal Expansion ◽  
Film Thickness ◽  
High Precision ◽  
Elastic Recovery ◽  
Zero Point ◽  
Rolling Process ◽  
Correction Method ◽  
Work Piece ◽  
Plate Rolling ◽  
On Line

According to the characteristic of plate rolling process and the on-line applications, the non-homogeneous wear and thermal expansion of rollers, the elastic recovery and thermal expansion of work pieces, the variation of oil film thickness and the zero point deviation, which influence the precision of gap setting model, are analyzed. Based on the results of analysis, a high-precision gap setting model is proposed, and a zero point correction method is developed, in order to avoid overshoot, damp coefficient, which is affected by the thickness of work piece and zero point deviation are considered, is introduced. On-line applications indicate that the gap setting model improves the precision of gap setting and laid a good foundation of further improvement of thickness accuracy.

scholarly journals The research and development of longitudinal profiled (LP) plate

2018 ◽  
Vol 175 ◽  
pp. 01025
Author(s):  
Lu Shiping ◽  
Li qun ◽  
Wang Zhiyong ◽  
Gu Linhao ◽  
Zhang Xuanming
Keyword(s):  
Research And Development ◽  
Thick Plate ◽  
Steel Plate ◽  
Rolling Process ◽  
Bite Angle ◽  
Plate Rolling ◽  
Ordinary Steel ◽  
Test Result

In this paper, the advantages of the longitudinal profiled(LP) steel plate is described, and the characteristics of LP plate rolling process is introduced. In contrast to the ordinary steel plate, The change rule of the bite angle and other parameters is put forward from the rolling principle. On this basis, the rolling plan is formulated. The finished condition of the steel plate is TMCP, and the size of the steel plate is corresponding to the setting value. Test result shows that the performance meets the standard of Q345. This indicates that LP plate has successfully developed in the Shougang thick plate plant.

Microstructural Design and Control of Silicon Nitride Ceramics

MRS Bulletin ◽  
1995 ◽  
Vol 20 (2) ◽  
pp. 38-41 ◽  
Author(s):  
Mamoru Mitomo ◽  
Naoto Hirosaki ◽  
Hideki Hirotsuru
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Phase Transformation ◽  
Silicon Nitride ◽  
Grain Growth ◽  
Processing Parameters ◽  
Microstructural Development ◽  
Nitride Ceramics ◽  
Microstructural Design ◽  
And Control

The improvement of mechanical properties by microstructural control has been one of the main topics of interest in the development of silicon nitride ceramics. Toughening, by developing an in situ composite or self-reinforced microstructure, has attracted particular attention.Microstructural design is a key factor in the optimization of processing parameters. The microstructures of sintered materials are composed of silicon nitride grains and grain boundaries, which can be either crystalline, amorphous, or partially crystalline, depending on the composition, amount of sintering additives, and processing parameters. Silicon nitride ceramics have been fabricated with an addition of metal oxides and rare-earth oxides that form a liquid phase during sintering and accelerate grain boundary diffusion. The effect of composition of the glassy phase on the mechanical properties of ceramics is presented by Becher et al. and Hoffmann elsewhere in this issue. This article focuses specifically on the design and control of grain size.As it is well recognized, many processing parameters affect grain growth behavior and the resulting microstructure. During sintering, the α- to β-phase transformation leads to a self-reinforcing microstructure on account of the anisotropic grain growth of the stable hexagonal β- Si3N4 phase. Therefore, α-rich powders are widely used for starting materials. Phase transformation accelerates anisotropic grain growth, resulting in an increase in the fracture toughness of Si3N4 ceramics. Kang and Han discuss the effect of phase transformation on nucleation and grain growth in an article in this issue. The effect of the grain-size distribution on microstructural development is described in this article, based on studies conducted mostly with β-Si3N4 powders.

Adaptive Signal Analysis and Interpretation for Real-time Intelligent Patient Monitoring

1994 ◽  
Vol 33 (01) ◽  
pp. 60-63 ◽  
Author(s):  
E. J. Manders ◽  
D. P. Lindstrom ◽  
B. M. Dawant
Keyword(s):  
Computer Architecture ◽  
Real Time ◽  
Data Abstraction ◽  
Monitoring Strategy ◽  
Intelligent Monitoring ◽  
Patient Status ◽  
On Line ◽  
Main Components ◽  
And Control ◽  
Adaptive Signal

Abstract:On-line intelligent monitoring, diagnosis, and control of dynamic systems such as patients in intensive care units necessitates the context-dependent acquisition, processing, analysis, and interpretation of large amounts of possibly noisy and incomplete data. The dynamic nature of the process also requires a continuous evaluation and adaptation of the monitoring strategy to respond to changes both in the monitored patient and in the monitoring equipment. Moreover, real-time constraints may imply data losses, the importance of which has to be minimized. This paper presents a computer architecture designed to accomplish these tasks. Its main components are a model and a data abstraction module. The model provides the system with a monitoring context related to the patient status. The data abstraction module relies on that information to adapt the monitoring strategy and provide the model with the necessary information. This paper focuses on the data abstraction module and its interaction with the model.

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