scholarly journals Analysis of twin-roll casting AA8079 alloy 6.35-μm foil rolling process

2016 ◽  
Vol 50 (6) ◽  
pp. 861-868 ◽  
Author(s):  
Ahmet Can ◽  
Hüseyin Arikan ◽  
Kadir Çinar
Keyword(s):  
Rolling Process ◽  
Twin Roll Casting ◽  
Foil Rolling ◽  
Roll Casting ◽  
Twin Roll

scholarly journals Asymmetric Twin-Roll Casting of an Al-Mg-Si-Alloy

2018 ◽  
Vol 918 ◽  
pp. 48-53 ◽  
Author(s):  
Olexandr Grydin ◽  
Mykhailo Stolbchenko ◽  
Maria Bauer ◽  
Mirko Schaper
Keyword(s):  
Mechanical Properties ◽  
Casting Process ◽  
Rolling Process ◽  
Age Hardening ◽  
Process Conditions ◽  
Shear Stresses ◽  
Asymmetric Rolling ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

The industrial application of high-alloyed Al-Mg-Si alloys for the production of thin strips by means of twin-roll casting is limited due to the structural inhomogeneity and segregation formation. To reach the highest mechanical properties of the finished product, a direct influence on the strip formation conditions during the twin-roll casting can be applied. Analogous to the asymmetric rolling process, additional shear stresses were created in the strip forming zone by using different circumferential velocities and torques of the caster rolls. To provide the asymmetric process conditions, only one caster roll was left driven and the second one was left idling during the casting process. The microstructure and the mechanical properties of the strips in the as-cast state as well as after the homogenization and subsequent age-hardening were analyzed. A comparison of the test results showed a positive influence of the asymmetry conditions on the strips’ properties.

Research on the Rolling of AZ31 Strip Prepared by Twin Roll Casting

2009 ◽  
Vol 610-613 ◽  
pp. 844-847 ◽  
Author(s):  
Jian Wang ◽  
Bin Jiang ◽  
Pei Dao Ding ◽  
Guang Jie Huang ◽  
Fu Sheng Pan
Keyword(s):  
Thin Sheet ◽  
Rolling Process ◽  
Minimum Thickness ◽  
Small Thickness ◽  
Cast Strip ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Az31 Sheet ◽  
Conventional Rolling ◽  
Twin Roll

The AZ31 thin sheet (minimum thickness less than 1mm) was obtained by rolling the cast strip which was prepared by vertical twin roll casting in this paper. Since the absolute deformation during rolling was smaller,due to the small thickness of the strip of 3mm, the rolling of cast strip was different from the conventional rolling process. It was found that homogenizing time at 400°C for the cast strip was 4h and reduction per pass should be 8-10% for producing thinner (1-1.5mm) rolled AZ31 sheet at 350°C. Mechanical properties of the sheet were equivalent to conventional rolling sheet’s.

Texture Evolution in Non-Oriented Silicon Steel Processed by Twin-Roll Casting

2012 ◽  
Vol 452-453 ◽  
pp. 7-11 ◽  
Author(s):  
Wei Pei ◽  
Yu Hui Sha ◽  
Fang Zhang ◽  
Liang Zuo
Keyword(s):  
Cold Rolling ◽  
Texture Evolution ◽  
Casting Process ◽  
Rolling Process ◽  
Silicon Steel ◽  
Recrystallization Annealing ◽  
Twin Roll Casting ◽  
Steel Sheets ◽  
Roll Casting ◽  
Twin Roll

In this paper, non-silicon steel sheets were produced by both twin-roll casting method and conventional process. Orientation characteristics and texture evolution of the sheets during casting, cold rolling and recrystallization annealing were investigated for comparison. It was found that the subsurface of twin-roll casting strips are characterized by weak {100} orientation while the central layer by random orientation. Twin-roll casting process can decrease α fiber (//RD) and increase γ fiber (//ND) during cold rolling process. Consequently, the η fiber (//RD) favorable for magnetic properties of non-silicon steels is enhanced and the detrimental {111} component is suppressed after annealing.

scholarly journals Study of the Mechanical Properties of Strips Obtained in TRC Line

2016 ◽  
Vol 61 (2) ◽  
pp. 1101-1108 ◽  
Author(s):  
A. Mamala ◽  
W. Ściężor ◽  
P. Kwaśniewski ◽  
J. Grzebinoga ◽  
R. Kowal
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Cold Rolling ◽  
Rolling Process ◽  
Twin Roll Casting ◽  
Integrated Method ◽  
Casting Technology ◽  
Roll Casting ◽  
Processing Line ◽  
Twin Roll

Abstract Twin Roll Casting technology belongs to modern, integrated method of processing aluminum and its alloys. This method includes preparation of liquid metal and its continuous casting between the rotating cylindrical crystallizers, optional homogenizing treatment, cold rolling and optional interoperation or final heat treatment. Final products of TRC method are strips with a thickness from few to several millimeters, which can be directly subjected to cold rolling process to afford a sheet. Properties of final product are limited by the material’s condition, its chemical composition and also selected path of its processing technology. The paper presents research results of chemical composition and mechanical properties of strips obtained in Twin Roll Casting processing line.

Twin Roll Casting of Aluminium Alloy ADC12, A3003, A7075

2017 ◽  
Vol 735 ◽  
pp. 18-23
Author(s):  
Yuta Kashitani ◽  
Shinichi Nishida ◽  
Junshi Ichikawa ◽  
Hiroto Ohashi ◽  
Naoshi Ozawa ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Casting Process ◽  
Rolling Process ◽  
Alloy Strip ◽  
High Tensile Strength ◽  
Experimental Conditions ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

This paper describes a vertical type twin roll strip casting process for producing aluminum alloy strip of ADC12, A3003 and A7075. Twin roll casting process is able to produce a strip from molten metal directly. Thus this process has a possibility to reduce total cost of sheet making comparing to conventional rolling process. Aluminum alloy ADC12 is a casting material that is used for die casting. A3003 is known as a wrought aluminum alloy for aluminum can body sheet. The A3003 sheet is generally produced by rolling, so it is effective for reducing a process cost to produce the strip by twin roll casting process. Aluminum alloy A7075 has high tensile strength, and it is known as a material for aerospace application. The sheet is manufactured in small quantities comparing to the other sheet aluminum alloy. It is supposed that the demand of high tensile strength aluminum sheet such as A7075 is going to increase for weight saving of structural material. In this study, twin roll casting experiment was performed to produce these three aluminum alloy strip in same experimental conditions. Castability, surface conditions and strip thickness were estimated. It was possible to cast these aluminum alloy strip.

Simulation of Inelastic Deformation and Thermal Mechanical Stresses in Twin-Roll Casting Process of Mg Alloy

2007 ◽  
Vol 340-341 ◽  
pp. 877-882
Author(s):  
Xiao Dong Hu ◽  
Dong Ying Ju
Keyword(s):  
Casting Process ◽  
Rolling Process ◽  
Mechanical Stresses ◽  
Slip Zone ◽  
Thin Strip ◽  
Small Displacement ◽  
Thermal Flow ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Twin-roll thin strip casting process combines casting and hot rolling process into a single step; in which melt and solid states exist in the casting region, so its deformation is more complex than rolling process. In this paper, Anand’s model, a unified visco-plasticity constitutive model, was employed to simulate the highly nonlinear behavior in the twin-roll casting process. Anand model’s parameters were regressed based on compression tests at various temperature and strain rate for magnesium alloy AZ31. To calculate the thermal mechanical stresses, the thermal flow of twin-roll casting process was simulated firstly; then stresses were calculate, in which the temperature field result of thermal flow was imposed as body load, and a small displacement load along roller tangential direction was imposed simultaneously in order to simulate rolling action. The deformation results can well describe the forward slip zone, backward slip zone and melt eddy zone in the casting region. Based on the results, the applicability of Anand’s model on twin-roll casting process was discussed.

Effects of Downstream Rolling on Microstructure and Mechanical Properties of Twin Roll Casting AZ31B Strip

2009 ◽  
Vol 614 ◽  
pp. 123-128 ◽  
Author(s):  
Hong Yang Zhao ◽  
Xiao Dong Hu ◽  
Dong Ying Ju
Keyword(s):  
Mechanical Properties ◽  
Reduction Rate ◽  
High Strength ◽  
Rolling Process ◽  
Mg Alloy ◽  
Rolled Strip ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Rolling Strip ◽  
Twin Roll

Experimental study on downstream rolling process for twin roll casting magnesium alloy strip was carried out. The microstructure of the casting and rolling strip were observed by OM, SEM, and TEM. The effects of homogenizing process, the parameters of rolling process and annealing after rolled on secondary rolling of AZ31B casting strip were analyzed. The results show that the twin roll casting strip are suitable for rolling at 380-420 °C after homogenizing at 400 oC for two hours, the reduction rate of each pass should be controlled lower than 18%. Mg alloy sheets with thickness from 0.3-1 mm can be produced in once annealing period in this way. By controlling the pass reduction and rolling temperature, the fabricated AZ31B Mg alloy sheets can achieve both high strength and good plasticity by grain refining below 10μm. The mechanical properties of rolled strip after annealing at 400 oC for 0.5h-1h could get tensile strength 220MPa and meantime elongation rate 20%.

Microstructure and Texture of MX20 after Conventional Rolling and Rolling from Twin Rolled Cast Strip

2018 ◽  
Vol 941 ◽  
pp. 1418-1423
Author(s):  
Gerrit Kurz ◽  
Tom Petersen ◽  
Roland Hoppe ◽  
Jan Bohlen ◽  
Dietmar Letzig
Keyword(s):  
Magnesium Alloy ◽  
Rolling Process ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Internally Cooled ◽  
Twin Roll Cast ◽  
Conventional Rolling ◽  
Twin Roll ◽  
Free Magnesium ◽  
Feedstock Material

Two main impediments are currenty discussed with respect to the industrial application of magnesium sheets. First, the low formability of magnesium sheets requires many rolling passes to roll cast slabs to final gauge, which leads, second, to high costs for the production of magnesium sheets. An alternative cost-saving process chain for magnesium sheets with enhanced properties is the feedstock production by twin roll casting (TRC). In the TRC process, liquid metal proceeds from a furnace over a pipe into a crucible and then flows between a pair of counter rotating, internally cooled rolls. The metal solidifies upon touch with the cooled rolls and gets rolled to a strip. This paper refers to the comparison of the two processing routes on the example of the aluminum-free magnesium alloy MX20 (2 wt% Mn and 0.5 wt% Ca). Both kinds of production processes like casting and twin roll casting have an influence on the microstructure and texture of the feedstock material for the subsequent rolling process. The paper reports on the results of casting and twin roll casting experiments of this alloy. Furthermore, rolling trials are conducted and the deformation behavior of the sheets are presented and discussed with respect to the developed microstructures and textures. The different morphology of precipitates in the cast and twin roll cast feedstock material is used to improve the ductility of the magnesium alloy MX20.

scholarly journals Microstructure and Damping Capacity of ZK60 Alloy Sheets Fabricated by Twin Roll Casting and Hot Rolling Process

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Hongmei Chen ◽  
Xiaowen Li
Keyword(s):  
Hot Rolling ◽  
High Strength ◽  
Rolling Process ◽  
Reduction Ratio ◽  
Damping Capacity ◽  
Twin Roll Casting ◽  
Hot Rolling Process ◽  
Roll Casting ◽  
Zk60 Alloy ◽  
Twin Roll

ZK60 magnesium alloy sheets with 0.65 mm thickness were successfully fabricated by twin roll casting (TRC) and subsequent hot rolling process. Fine equiaxed grains were obtained after T6 treatment by the short-term TRC and hot rolling process, and the grain size for different reduction ratio per pass was similar. The studied sheets exhibited high strength and elongation, and the tensile strength, yield strengths, and elongation for the 10% and 30% reduction per pass were above 400 MPa, 300 MPa, and 17.0 %, respectively. The damping capacity values at low strain decreased with increasing the reduction ration per pass and the values at high strain were similar for the different reduction ration per pass. The lower reduction ratio per pass and the heat treatment between rolling passes can improve the mobility of dislocations, which indicated that this process was beneficial for improving damping capacity. Compared with higher reduction ratio per pass, the high tensile properties and damping capacity were obtained by 10% reduction per pass hot rolling process.

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