Effect of Chromium and Manganese on the Formations of Graphite and Carbide on the surface of Low Carbon Sheet Steels. Surface graphite and surface carbide are two surface defects observed in cold-rolled low carbon steel sheets after batch annealing under non-oxidising atmosphere. The surface defects detract from the appearance of the steel sheets and diminish the surface treatment potential of the sheets, causing significant and costly material losses. The aims of the project are to study the in ....Effect of Chromium and Manganese on the Formations of Graphite and Carbide on the surface of Low Carbon Sheet Steels. Surface graphite and surface carbide are two surface defects observed in cold-rolled low carbon steel sheets after batch annealing under non-oxidising atmosphere. The surface defects detract from the appearance of the steel sheets and diminish the surface treatment potential of the sheets, causing significant and costly material losses. The aims of the project are to study the inhibition of surface graphite formation by the additions of Chromium and Manganese and to study the mechanism of formation of surface carbide with the aim of developing an alloying / processing strategy which eliminates both the surface graphite and the surface carbide.Read moreRead less
Influence of adsorbed surfactants on three phase contact line motion at high capillary number. The interaction between thin films and solid surfaces underpins the performance of a number of value-adding industrial processes, most notably metallurgical coating operations. Typically, these operations are performed at speeds well beyond the range of existing models, thereby limiting their value when changes in operation occur or when there are problems with product quality. Existing models are also ....Influence of adsorbed surfactants on three phase contact line motion at high capillary number. The interaction between thin films and solid surfaces underpins the performance of a number of value-adding industrial processes, most notably metallurgical coating operations. Typically, these operations are performed at speeds well beyond the range of existing models, thereby limiting their value when changes in operation occur or when there are problems with product quality. Existing models are also limited by their inability to account for the presence of surfactants commonly used throughout industry. This study will produce a capability for predicting how velocity and local changes in molecular composition affect the wetting/dewetting of coated surfaces.Read moreRead less
Tribological contact of work roll in hot rolling. Steel and aluminium manufacturers form their products by shaping a hot metal billet using, for example, presses and rollers which contact the rapidly cooling metal in the production line. The economic benefits of lubrication, reduced rolling force (up to 25%), reduced roll wear and extended roll life (up to 40%), reduced down time due to roll change, and better strip quality are very significant for these manufacturing processes. This comprehens ....Tribological contact of work roll in hot rolling. Steel and aluminium manufacturers form their products by shaping a hot metal billet using, for example, presses and rollers which contact the rapidly cooling metal in the production line. The economic benefits of lubrication, reduced rolling force (up to 25%), reduced roll wear and extended roll life (up to 40%), reduced down time due to roll change, and better strip quality are very significant for these manufacturing processes. This comprehensive program will provide new knowledge on lubrication and roll wear to help Australian manufacturing industry (e.g. steel and aluminium) to better understand and optimise their processes to achieve maximum benefits.Read moreRead less
Mechanics of Cold Rolling of Thin Strip. The main aim of this project is to generate a new theory for the cold rolling of thin strip (thickness: 0.1 - 0.15mm) when the work rolls contact beyond the edges of strip. The new knowledge will improve the rolling of thin strip, which is very sensitive to many parameters,some of which could not be acccounted for by existing rolling models. The expected outcomes are (1)development of a sophisticated new theory for thin strip rolling, (2) development of n ....Mechanics of Cold Rolling of Thin Strip. The main aim of this project is to generate a new theory for the cold rolling of thin strip (thickness: 0.1 - 0.15mm) when the work rolls contact beyond the edges of strip. The new knowledge will improve the rolling of thin strip, which is very sensitive to many parameters,some of which could not be acccounted for by existing rolling models. The expected outcomes are (1)development of a sophisticated new theory for thin strip rolling, (2) development of novel methods, (3) comprehensive simulation model that can predict accurately is rolling parameters and in particular the shapes and flatness of strip.Read moreRead less
Mechanics of mixed film lubrication in strip rolling. Rolling speeds of tandem cold rolling mills for thin steel strip are often limited by hot scratches and self excited chatter vibration, which forces the mill to slow down. Consequently the output is reduced and significant out-of-specification materials produced. Operating practices are guided by experience and trial-and-error method. In this project, a comprehensive model will be produced to quantify the effects of relevant parameters that c ....Mechanics of mixed film lubrication in strip rolling. Rolling speeds of tandem cold rolling mills for thin steel strip are often limited by hot scratches and self excited chatter vibration, which forces the mill to slow down. Consequently the output is reduced and significant out-of-specification materials produced. Operating practices are guided by experience and trial-and-error method. In this project, a comprehensive model will be produced to quantify the effects of relevant parameters that can provide a much better understanding of the rolling process at speeds higher than previously possible, and help to improve its productivity as well as product quality.Read moreRead less
Roll bite lubrication in hot strip rolling. Roll bite lubrication has been applied in hot strip rolling with significant cost savings in reduced rolling force, reduced roll wear and increasede productivity. However the mechanics of roll bite lubrication in the interface is not well understood due to the high temperature of the strip, scale oxide on the surfaces and contact asperities. It is known how the surface roughness is generated after rolling. This proposed project will develop a model to ....Roll bite lubrication in hot strip rolling. Roll bite lubrication has been applied in hot strip rolling with significant cost savings in reduced rolling force, reduced roll wear and increasede productivity. However the mechanics of roll bite lubrication in the interface is not well understood due to the high temperature of the strip, scale oxide on the surfaces and contact asperities. It is known how the surface roughness is generated after rolling. This proposed project will develop a model to simulate the roll bite lubrication process, to determine the roughness transfer from the roll surface to the strip surface, and optimise roll bite lubriation process.Read moreRead less
Contact mechanics in hot strip rolling. The mechanics of roll bite contact in hot strip rolling in the interface is not well understood due to the high temperature of the strip, scale oxide on the surfaces, contact asperities and lubrication mechanism of emulsion entrained in the roll bite. It is not known how the strip surface roughness is generated after rolling. This proposed project will develop a model to simulate the contact of the roll bite and to determine the quality of the surface roug ....Contact mechanics in hot strip rolling. The mechanics of roll bite contact in hot strip rolling in the interface is not well understood due to the high temperature of the strip, scale oxide on the surfaces, contact asperities and lubrication mechanism of emulsion entrained in the roll bite. It is not known how the strip surface roughness is generated after rolling. This proposed project will develop a model to simulate the contact of the roll bite and to determine the quality of the surface roughness transfer from the roll surface to the strip surface. The outcome would be significant cost savings in reduced rolling force, increased roll life, minimal surface defects and increased productivity.Read moreRead less
Strip shape performance at tandem cold mill. The shape of the strip at the cold mill are affected significantly by machine conditions and key process variables, and yet the inter-relationship between these key areas are not known and operators rely on trial-and-error methods to operate the mill. At high speeds, the shape of the strip leaving the mill is not good, causeing problems to rolling mills downstream. The project proposed here will integrate practical knowledge and numerical modeling of ....Strip shape performance at tandem cold mill. The shape of the strip at the cold mill are affected significantly by machine conditions and key process variables, and yet the inter-relationship between these key areas are not known and operators rely on trial-and-error methods to operate the mill. At high speeds, the shape of the strip leaving the mill is not good, causeing problems to rolling mills downstream. The project proposed here will integrate practical knowledge and numerical modeling of the strip shape of tandem cold mill at high speeds to optimise the quality of the strip exiting the cold mill, and enable the mill to operate at higher speeds than the current practiceRead moreRead less
Competitive nucleation and growth during rapid solidification of steel. This research will assist in maintaining Australia at the forefront of research into strip casting of steel. Fundamental understanding and new modelling capabilities will help to promote the take-up of this energy/emission/cost efficient revolutionary process. It will furthermore provide, through the development of a novel experimental technique, new research capabilities for Australian researchers in other fields such as ra ....Competitive nucleation and growth during rapid solidification of steel. This research will assist in maintaining Australia at the forefront of research into strip casting of steel. Fundamental understanding and new modelling capabilities will help to promote the take-up of this energy/emission/cost efficient revolutionary process. It will furthermore provide, through the development of a novel experimental technique, new research capabilities for Australian researchers in other fields such as rapid solidification of advanced materials, e.g. hard magnets and thermoelectric alloys.Read moreRead less