Conveners
Surface Technologies
- There are no conveners in this block
Surface Technologies
- Giovanni Bolelli (Dipartimento di Ingegneria "Enzo Ferrari", Università di Modena e Reggio Emilia)
Surface Technologies
- Giovanni Bolelli (Dipartimento di Ingegneria "Enzo Ferrari", Università di Modena e Reggio Emilia)
Description
4.3.1
The ongoing transformation to more sustainable production routes of the European steel industry is one of the major challenges in the upcoming years and is accompanied by a number of changes; 1) the use of a different raw material mix (more and lower scrap qualities), 2) the introduction of new processes or process combinations (e.g. direct casting and rolling processes) and 3) the use of...
Sarclad and CRM Group have successfully developed a new on-line sensor for steel strip contamination. The system utilizes laser-induced breakdown spectroscopy to give a continuous and real-time assessment of the contamination levels post-cleaning on a typical steel strip processing line.
Critically, this is the first system available that can distinguish between surface carbon and iron fines...
SMS group Pulse Nozzle technology reduces the energy consumption of the electrolytic cleaning section in strip processing lines by up to 90-95 %. The novelty of the process lies within the application of alternating current and its efficient cleaning properties. Instead of submerging the strip and simultaneously applying high currents, the Pulse Nozzle contacts the strip surface with...
This abstract is related to the EU RFCS project OLACSKIN, focalised on the removal of zinc stains and zinc fouling by laser cleaning at the skin-pass mill.
This presentation will be focused on the characterisation of the work rolls contamination and the first results obtained on zinc removing by laser.
If successful, this project will result in a yearly reduction of: 30.000 m³ of wastewater,...
The newly developed combination of oiling machine, smoothing roller and online oilfilm measurement system ensures uniform oil application on metal strips while minimizing oil consumption. Integrated with an inline oil film measurement system, it promptly detects oiling issues like overoiling or dry stripes, allowing operators to take immediate action.A key innovation is the smoothing roller,...
Steel components exposed to dynamic loads are prone to wear and oxidation. Nitriding is a thermomechanical treatment employed to overcome these issues. The significant enhancement in the properties of steel components following nitriding is mainly attributed to increased surface hardness, the development of internal stresses, and chemical modifications within the treated zone. Vanadium as an...
Carbon-based materials play an important role in today's science and technology. Carbon is a very versatile element whose two most interesting allotropic forms are Diamond (sp3) and Graphite (sp2). On this way the DLC has consolidated all its applications in the automotive and mechanical in general. The management of sp3/sp2 ratio generates various types of DLC that allow to enhance the...
This research investigates the enhancement of surface performance in 100Cr6-bearing steel through the application of alumina (Al₂O₃) ceramic coatings via thermal spraying, focusing on mechanical, tribological, and electrical characteristics. Coatings were applied using Atmospheric Plasma Spraying (APS) with varying thicknesses and assessed with or without a metallic interlayer and...
Sustainability has become a critical concern in the global steel industry. As steel production is inherently resource-intensive and generates significant emissions, the implementation of sustainable practices is crucial to mitigate its ecological footprint. This paper explores the current state and future prospects of sustainable galvanizing technology, a vital process for enhancing steel's...
Carbon steel strips are produced following a series of processes to convert the cast slabs to a coil of flat steel with required dimensions. The hot rolled coil has a protective and adherent layer of oxide scale from 5 to 15 µm thick. Before further processing, this layer of scale is removed in a process known as pickling, which consists of dissolution of the oxides by immersing the steel...
The formation of scale in a reheating furnace is influenced by the O2 content at high temperatures and the residence time within the furnace chamber. Since the temperature and the residence time of the steel are parameters dependent on the process, the only way to reduce scale formation is by decreasing the O2 content in high-temperature zones.
For this reason, Danieli Centro Combustion has...
The European steel sector is committed to improve sustainability of the whole steel production chain, from decarbonisation of major upstream processes up to all downstream operations, including rolling. In particular, in the cold rolling process, oil-in-water emulsions/dispersions are usually applied to lubricate the cold rolling process of low-Carbon steel. Such emulsions present some...
Electrical steel is an essential pre-product for efficient electrical devices. In cold rolling processes, an iron-silicon alloy is rolled into thin electrical strips (typical thickness 0.5 mm), which are then annealed and coated with special insulating varnishes. Sheets of different shapes and sizes are then punched and assembled to form magnetic cores. The thickness and homogeneity of the...
In steel making, several processing steps are required to produce carbon steels strips. During the hot rolling step, the high temperature and exposure to air and humidity leads to a surface covered by an oxide. The function of the pickling line is to remove this oxide layer to be able to continue processing the steel, such as by cold rolling, welding, coating, painting. Most of the pickling...
In cold rolling, the mixed lubrication regime is needed e.g. to avoid skidding. In fact, low viscosity oils are used as lubricants to set lubrication at the frontier of the boundary regime, promoting strip surface smoothing by finely ground rolls. This poses a risk of boundary regime interface degradation, including adhesive transfer, which may harm final strip surface quality. On the...
This study introduces a hybrid heating furnace design that integrates gas burners and induction heating to achieve enhanced energy efficiency, precise temperature control, and operational versatility. Gas burners provide high thermal output, while induction heating enables rapid, localized temperature adjustments, making the system ideal for applications such as metal heat treatment, rolling...
Improving energy efficiency and product quality in hot strip mills is essential to meet
the increasing demands for modern production facilities. Primetals Technologies
developed an advanced work roll lubrication and cooling package, including the
innovative Power Work-Roll Cooling system. This integrated solution combines
energy efficient dynamic work roll cooling, advanced roll-gap...