Entity

Time filter

Source Type

Chongqing, China

Tan Q.-Y.,Control Iron and Steel Research Institute, China | Zhou Y.-H.,Chongqing Iron and Steel Co. | Jia Z.-L.,Control Iron and Steel Research Institute, China | Wu W.,Control Iron and Steel Research Institute, China
Kang T'ieh/Iron and Steel (Peking) | Year: 2011

For finding out the reasons of disqualification of Q345R steel plate by ultrasonic detection, the investigation of macrostructure, microstructure, SEM and fracture of the steel plate were carried out. The results show that the main reason is the microcrack induced by aggregation of MnS and nitrides as well as the martensite and bainite in the center of plate.


Zhang Y.,Chongqing Jiaotong University | Tan J.,Chongqing Iron and Steel Co.
Journal of Iron and Steel Research International | Year: 2015

The vertical motion control of the roll was studied in order to improve the accuracy in simulation of variable gauge rolling. The discretization was carried out in the transition zone of TRB according to the principle of volume invariance. Based on this assumption, the formula for time step of vertical motion of rolls was proposed and the time-displacement curve of the vertical motion of rolls was established. In the preliminary simulation, the time-displacement curve was used as an initial method to control the vertical motion of rolls. Based on the simulation result, the formula for vertical velocity of roll in variable gauge rolling was derived from the common rolling principle. According to the formula, reasonable vertical velocity of rolls in the subsequent simulation was determined. It can accurately control the motion of rolls along the vertical direction. The desired thickness and outline profile of transition zone were acquired and the formula proved effective by the simulation. Further analysis shows that the di fference of thickness in the thick zone and the thin zone of TRB, length of the transition zone of TRB, radius of work rolls and rotation speed of rolls have a significant effect on the vertical velocity of rolls. © 2015 Central Iron and Steel Research Institute.


Ding Y.,Chongqing University of Science and Technology | Wang P.,Chongqing Iron and Steel Co.
Applied Mechanics and Materials | Year: 2012

This paper briefly describes the affecting factors and the key features of the hydraulic AGC system of thick steel plate miller. According to the research on the use and maintenance of the hydraulic AGC system of thick steel plate miller, the optimal design about the AGC servo cylinder, the system power source and the AGC servo control section of the hydraulic AGC system of thick steel plate miller has been given. © (2012) Trans Tech Publications, Switzerland.


Wang P.,Chongqing Iron and Steel Co. | Ding Y.,Chongqing University of Science and Technology
Applied Mechanics and Materials | Year: 2012

This paper briefly introduces and analyzes the basic working principle of the hydraulic shears of medium plate milling. This design can meet the optimum requirements of the hydraulic control system, such as the shear synchronization control and the distribution of shearing force. © (2012) Trans Tech Publications, Switzerland.


Li T.,Chongqing University of Technology | Li T.,Chongqing Iron and Steel Co. | Zhang J.X.,Chongqing University of Technology | Sun Q.,Chongqing University of Posts and Telecommunications
Advanced Materials Research | Year: 2013

The method of texture feature extraction and classification of pork loin B ultrasound image is proposed, which can be applied to the computer- aided judgment the pork loin fat content of pork loin. 5 texture features which is based on the texture of the co-occurrence matrix are extracted from the B ultrasound image of pork loin according to the digital image processing algorithm. Using the correlation analysis method to select the key texture extraction in the first step. Then,the classification is realized based on the BP neural network. The train set and test set are randomly chosen from 135 cases. Tests performed show that the proposed method result in a high classification accuracy, which will provide the researcher a valuable opinion on the pork fat content detection. © (2013) Trans Tech Publications, Switzerland.

Discover hidden collaborations