A Study on Potential Strip Shape Control of High‐Strength Steel during Hot Pinch Rolling Process

2020 ◽  
Vol 92 (1) ◽  
pp. 2000140
Author(s):  
Ning Kong ◽  
Chuan Zhao ◽  
Jianguo Cao ◽  
Qingdong Zhang
Keyword(s):  
High Strength Steel ◽  
Shape Control ◽  
High Strength ◽  
Rolling Process ◽  
Strip Shape

scholarly journals Chemical Component Optimization Based on Thermodynamic Calculation of Fe-1.93Mn-0.07Ni-1.96Cr-0.35Mo Ultra-High Strength Steel

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 65
Author(s):  
Yongli Chen ◽  
Xuejiao Zhou ◽  
Jianguo Huang
Keyword(s):  
High Strength Steel ◽  
Mechanical Response ◽  
High Strength ◽  
Chemical Compounds ◽  
Rolling Process ◽  
Chemical Component ◽  
Alloying Element ◽  
Alloy Content ◽  
Ultra High Strength Steel ◽  
Equilibrium Phases

Due to the complex composition and high proportion of alloys in traditional ultra-high-strength steel, the dilemma caused by ultra-high strength and low toughness in casting and forging forming processes requiring subsequent heat treatment can be mitigated with an efficient and economical rolling process. In this work, a thermodynamic model is proposed to calculate the change in the mechanical response due to the thermal contribution based on alloy phase diagrams. The influence of alloy content on precision laws was analyzed, and the chemical component was optimized. A verification simulation without real experiment was conducted to study the potential and limitations of the alloy content on mechanical properties. The results showed that the main equilibrium phases and the phases’ chemical compounds were clarified. The influences of Ni, Mo, Cr, and W on transformation laws were elucidated in detail, and the main optimized composition was determined to be 0.23C, 1.96Si, 1.93Mn, 0.07Ni, 1.96Cr, and 0.35Mo. At a cooling rate of 10 °C/s, the content of optimized alloying element fully performed its role in steel, verifying that the chemical component system was in the optimal range. The thermodynamic models and our conclusions have the potential to be generalized for many other materials and process configurations without requiring extensive material testing.

scholarly journals Analysis of Thin Strip Profile during Asymmetrical Cold Rolling with Roll Crossing and Shifting Mill

2014 ◽  
Vol 894 ◽  
pp. 212-216 ◽  
Author(s):  
Abdulrahman Aljabri ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei
Keyword(s):  
Cold Rolling ◽  
Shape Control ◽  
Work Roll ◽  
Rolling Process ◽  
Thin Strip ◽  
Asymmetrical Rolling ◽  
Strip Shape ◽  
Strip Profile ◽  
Profile Control ◽  
The One

Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers. Throughout rolling, the strip profile is controlled by using the advanced shape control rolling mill, such as the combination of work roll crossing and shifting during asymmetrical rolling, the one of the valuable methods to control the strip profile quality in rolling process. In this paper, the influences of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile are analysed. The strip shape control is discussed under both symmetrical and asymmetrical rolling conditions. The obtained results are appropriate to control the rolled thin strip profile in practice.

Three Dimensional Finite Element Simulation of Strip Shape and Flatness of High Strength Steel

2019 ◽  
Vol 794 ◽  
pp. 232-245 ◽  
Author(s):  
Hai Bo Xie ◽  
Lian Jie Li ◽  
Tian Wu Liu ◽  
En Rui Wang ◽  
Xu Liu ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
High Strength Steel ◽  
Three Dimensional ◽  
High Strength ◽  
Strip Shape ◽  
Element Simulation ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Edge Drop

High-strength steel is a type of alloy steel that provides better mechanical properties or greater resistance to corrosion than carbon steel. Strip shape is an important factor affecting the strip quality significantly for the rolled products. Because of the complex influence factors of plate shape and profile, shape detection and control technology have not been solved, especially for high strength steel rolling. In this paper, a novel three dimensional finite element simulation of the strip shape and flatness of high strength steel has been proposed. The material constitutive model has been built up based on experimental results through the Gleeble 3800 Thermal Simulator under different temperatures and stain rates. The modelling of roll elastic deformation system, roll gap profile and edge drop has been set up systematically considering the influence of the work roll transverse shifting and roll bending. Results have shown that both higher bending force and more roll shifting will significantly reduce the strip crown, and obtain improved edge drop distribution as well. The proposed numerical model has been validated through hot rolling experiments in 4-high rolling mills.

Microstructure and Property of 700MPa Ti Microalloyed High Strength Steel Produced by EAF-CSP

2011 ◽  
Vol 287-290 ◽  
pp. 961-965
Author(s):  
Ji Xiang Gao ◽  
Xin Ping Mao ◽  
Qi Lin Chen ◽  
Lie Jun Li
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Continuous Casting ◽  
High Strength Steel ◽  
High Strength ◽  
Strengthening Mechanism ◽  
Rolling Process ◽  
Precipitation Strengthening ◽  
Smelting Process ◽  
Hot Rolled

High strength steel ZJ700MC with yield strength grade of 700 MPa was successfully developed by Ti micro-alloyed technology in the EAF-CSP line at Zhujiang Steel. The composition design, smelting process, continuous casting and rolling process of the steel, as well as the mechanical properties of the hot-rolled product are introduced in the paper. An analysis on the strengthening mechanism of the high strength steel shows that the enhanced strength and toughness of the steel were caused by the refinement of ferrite grain and the precipitation strengthening of TiC.

High-Precision Section Control Technology for High-Strength Yoke Steel Strip

2019 ◽  
Vol 944 ◽  
pp. 212-221
Author(s):  
Hai Nan He ◽  
Xiao Chen Wang ◽  
Quan Yang
Keyword(s):  
High Precision ◽  
Shape Control ◽  
Steel Strip ◽  
High Strength ◽  
Work Roll ◽  
Economic Benefits ◽  
Control Technology ◽  
Strip Shape ◽  
Hot Rolled ◽  
And Control

The hot-rolled yoke steel plate is used in the manufacture of motor rotors for core components of large generators, which is required to ensure high strength and high-precision plate profile, especially the control of the thickness difference. High-precision cross-section control technology from rough rolling to finishing rolling for high-strength yoke steel is designed. First, through the varying contact backup roll technology and optimization of load distribution in the roughing stand, the profile of transfer bar is improved, which provides the basis for the strip shape control in the finishing mills. Secondly, the approximate rectangular section of a hot strip is obtained by high-precision shape setting and control model for finishing rolling, symmetrical variable taper work roll technology and smart shifting technology in the downstream stands. These methods solve the problem that the shape of the high-strength strip is difficult to control, and significantly enhance the shape regulation ability and control accuracy of the hot-rolled yoke. In addition, this technology has been applied to hot rolling mills with remarkable results and economic benefits.

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