Danieli Wean United

Buttrio, Italy

Danieli Wean United

Buttrio, Italy
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Muntin A.,OSJC Vyksa Steel Works | Zinyagin A.,Danieli Wean United
METAL 2014 - 23rd International Conference on Metallurgy and Materials, Conference Proceedings | Year: 2014

One of the main features of rolling process is the inhomogenity of strain in the cross section of slab. It is especially important to know strain distribution in case of massive slabs multipass rolling. Shear stress has a significant contribution in accumulated equivalent strain due to a change of sign in roll bite which is difficult to estimate assuming only the final result after pass is done. In case of physical simulation of hot rolling conditions Gleeble may be advisable to use as a separate sample imitation of a specific layer in thickness. Thus it is necessary to use the values of the equivalent strain derived from calculations using mathematical modeling. For a better understanding of the processes occurring during rolling, the FEM model has been created. In order to check stress distribution along the plate thickness, an experiment was made using a slab with staked pins. The pin located near the surface was more deformed than others and it almost didn't have cavities around. The deeper pin is located, cavities become longer and higher, which means smaller compressive stresses along the axis Oy and larger tensile stresses along the axis Ox. The verification of madel was made by comparison of expirement results with modelled ones.

Bulfone M.R.,Danieli Wean United
MPT Metallurgical Plant and Technology International | Year: 2010

A new wide plate mill complex has been started up by Danieli which is designed to fulfill the requirements for high productivity, yield, tight dimensional tolerances, enhanced mechanical properties and improved surface quality that are a must for the modern plant. Danieli has supplied all the technological line plant on turn-key basis with related automation and electrical equipment. Additionally, Danieli has supplied the main auxiliary plants such as roll shop, water treatment plant, compressed air system, laboratories, cranes etc. Due to the site location and the bad soil condition, the plant has been installed on a platform at seven meters higher than the ground level. A mathematical model is used to control the burners to obtain the optimum reheating curve for each steel grade. After the cooling phase is completed a nine-roll hot leveler is installed to correct any flatness defects. The output product quality meets and exceeds international standards.

Bianco M.,Danieli Wean United
Proceedings of the 10th International Conference on Steel Rolling | Year: 2010

the contract represents the largest order for flat-products finishing lines in Europe placed with a single plant builder in recent years, and is intended to double the production capacity for finished strip at the Ravenna works. Danieli is particularly proud of this achievement, as it came at the end of a very close negotiation that involved all major plant builders, and also because it is a clear recognition of the good work Danieli performed in Ravenna during the execution of the hot-dip galvanizing line No. 2 project.

Crisa E.,Danieli Wean United
MPT Metallurgical Plant and Technology International | Year: 2011

Chinese steel company Jiang Yin Xin Cheng Special Steel Works Co. (JYXC) has erected a new greenfield wide plate mill nearby its existing bar mill facilities. Danieli Automation designed and supplied all basic and technological L1 and L2 control systems for the entire plate mill. The new mill is providing JYXC a highly integrated and optimized automation system that ensures accurate and reproducible results in terms of product quality and improved plant efficiency. The automation system is able to process ingot rolling for high quality metallurgical products and plate rolling for special building and shipbuilding applications. A ExStream™ cooling section control capabilities extend the plant's production range to include specialty steel grades such as API grades.

Pigani A.,Danieli Wean United
MPT Metallurgical Plant and Technology International | Year: 2011

The evolution of thin slab casting and rolling is studied in the context of Danieli, including first generation plants to recent applications, describing the different available solutions for specific market needs and gives an outlook on future potentials. The company has been working on the evolution of casting and rolling solutions to increase the production level, extend the product mix, increase the quality of the products, and add new products. Since the first pioneering applications, Danieli has adopted a thin slab caster that strongly differs from other technologies. Roughing stands and finishing stands are completely independent providing the proper optimal rolling conditions for each unit. Other works include the introduction of a fully continuous casting/rolling process, particularly suitable for the production of ultra thin gauges, consistently down to 0.8 mm.

Svetina M.,Danieli Wean United | Vignolo L.,Danieli Wean United | Turchetto M.,Danieli Wean United
AISTech - Iron and Steel Technology Conference Proceedings | Year: 2014

In 2010 Danieli & C. Spa has put into operation a new Pickling Tandem Mill in Cremona (Italy) by Acciaieria Arvedi, the last PLTCM in Europe. The installation was tailor made designed in order to suit the specific requirements of his customer; a very broad range of size and grades (IF to AHSS as DP and TRIP1000) and ultra-thin hot band can be processed achieving the total capacity of 1.6 Mt/y. The Danieli & C. Spa. Turboflo® process was selected, based on its proven efficiency and ability to handle ultra-thin gauges at speeds exceeding 400 mpm in the pickling tanks. The whole equipment, i.e. Pickling section and Rolling mills, has been supplied with the last generation of Danieli market Oriented technologies. Danieli & C. Spa. with the support of Arvedi and field feedbacks is continuously improving the design technical solutions and optimize operations of the plant. © 2014 by AIST.

Vignolo L.,Danieli Wean United
MPT Metallurgical Plant and Technology International | Year: 2011

One of the most innovative coupled cold mills in Europe is started up at Acciaierie Arvedi in Italy, ensuring the best final product quality and production flexibility. For a new cold mill complex, Danieli Wean United, Buttrio, Italy, was awarded the order to supply the pickling and tandem cold rolling mill for an innovative facility capable of handling hot rolled material from 0.6 to 4 mm to be reduced by to 75% in thickness. The heart of the cold complex is a continuous pickling line with delivery tension reel. The pickling action is controlled by automation, a suitable preliminary preparation of the strips to be processed and the kinetics of the pickling liquor supplied at each pickling tank inlet and outlet. Long-stroke shifting is performed for both intermediate and work rolls and a meta-stable emulsion system is used to lubricate the bite, at least two separate systems are provided.

Guagnelli M.,Danieli Wean United | Bobig P.,Danieli Wean United
MPT Metallurgical Plant and Technology International | Year: 2013

A model for ductile to brittle transition temperature (DBTT) has been developed by Danielli for high grade API 5L strips produced in thin slab QSP (quality strip production) mill layouts. By means of such a model, the potential of QSP technology for API 5L production has been assessed. Based on this assessment, X80 grade strips can be produced up to 19 mm thickness, starting from a slab thickness of 105 mm; X70 and X60 grade can be produced from a 105 mm thick slab up to 22mm and 26mm strip thickness, respectively. In the first step the microstructure at the exit of the reheating furnace is refined by subsequent pass rolling at high temperature, during the time between subsequent passes the microstructure, which has been deformed in the first passes, recrystallizes; by adjusting the alloying content and the pass temperatures, the recrystallization process brings to a refinement. After hot rolling, the strip is cooled on the run-out table (ROT) and coiled as in conventional hot strip mills.

Piemonte C.P.,Danieli Wean United | Pigani A.,Danieli Wean United
AISTech - Iron and Steel Technology Conference Proceedings | Year: 2012

Thin slab casting and rolling has been originally developed as a "low cost" alternative to conventional casting and rolling process route however , due to the technological restrictions of the "first generation plants" , limited quality and productivity goals could be achieved, questioning the further application of this technology to more advanced applications. Since its first pioneering applications in 1884, Danieli developed his own original design and technology, strongly diversified from other available solutions on the market that allowed Danieli plants to largely overcome the original "first generation plants" limitations. This paper describes this progressive evolution through the outstanding results reached by Danieli reference plants, the different available solutions that can be adopted according to specific market needs as well as an outlook to future expansion already conceivable.

Guagnelli M.,Danieli Wean United | Bobig P.,Danieli Wean United
Metallurgia Italiana | Year: 2014

A methodology for estimating the potentiality of the thin slab two step thermo-mechanical rolling technology for the API 5L grades production is described in this paper. The requirements on Ductile to Brittle Transition Temperature (DBTT) are considered the most important limiting factor for API 5L strip grades produced by Thin Slab technology because of the difficulties in achieving a refined and homogeneous microstructure. The results obtained by Danieli QSP layout, which are -60 °C DBTT for X70M -12.7 mm thick strips in OMK Vyksa mini-mill, are very promising. The limitation to thicknesses up to 12.7 mm is due to the product mix defined by the customer and not a limitation of the QSP layout. The relaxation in the requirement on DBTT is in fact potentially convertible in higher strip thickness and the quantification of such a conversion is the first modeling of the proposed approach. The limitations in the refinement achievable by thin slab rolling is considered in a second modeling which quantifies the effect of finishing rolling reductions on the Effective Grain Size of the final microstructure. The proposed methodology allows in particular defining the limiting thicknesses producible by a given QSP layout for each API 5L grade. It can be used as well for defining the slab size to be chosen for a given product mix.

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