Round billet temperature during induction heating was calculated with numerical simulation method in present work,the factors affect induction heating were studied,such as coil turns.using of magnetic material,the con...Round billet temperature during induction heating was calculated with numerical simulation method in present work,the factors affect induction heating were studied,such as coil turns.using of magnetic material,the convective heat transfer between billet surface and surrounding environment,etc.It was found that coil turns played an important role in round billet temperature distribution,and it was necessary to choose reseaonable coil turns in order to get a relatively uniform temperature distribution.Using magnetic flux concentrator could greatly improve the billet end temperature,and the phenomena of low temperature in billet end would be elimiated.Besides,the billet temperature would be reduced by convective heat transfer in billet outsurface and air,longer time was cost to reache the target temperature.Meanwhile,the magnetic field during billet induction heating was calculated,it was used to explain billet temperature distribution and variation,the reasonable measures to control billet temperature during induction heating process were proposed.展开更多
EPM-related technologies are widely used in Baosteel,where a full-time working team is making their effort in various topics for better qualities of steel products.In this paper,applications and new developments of EM...EPM-related technologies are widely used in Baosteel,where a full-time working team is making their effort in various topics for better qualities of steel products.In this paper,applications and new developments of EMS technology in Baosteel are mainly introduced.Although EMS has already become conventional means for improving steel billet/bloom and slab qualities,there still exist problems due to low efficiency or unsatisfactory application results.To solve these problems,not only the internal mechanical structure of the EMS equipments,but also the relationship between EMS and solidification process,physical properties as well as fluid mechanics should be carefully investigated. By using of computer simulation,laboratory and on-line experiments,our understandings of EMS technology have been upgraded based on the obtained results.For improvement of equiaxed crystal ratio,the magnitude of EMS force plays a much more important role than superheat.And the nonlinear relations between power source frequence and EMS force are quite different for different types of EMS equipments,which means adjustment of frequence to a proper value is very important.展开更多
文摘Round billet temperature during induction heating was calculated with numerical simulation method in present work,the factors affect induction heating were studied,such as coil turns.using of magnetic material,the convective heat transfer between billet surface and surrounding environment,etc.It was found that coil turns played an important role in round billet temperature distribution,and it was necessary to choose reseaonable coil turns in order to get a relatively uniform temperature distribution.Using magnetic flux concentrator could greatly improve the billet end temperature,and the phenomena of low temperature in billet end would be elimiated.Besides,the billet temperature would be reduced by convective heat transfer in billet outsurface and air,longer time was cost to reache the target temperature.Meanwhile,the magnetic field during billet induction heating was calculated,it was used to explain billet temperature distribution and variation,the reasonable measures to control billet temperature during induction heating process were proposed.
文摘EPM-related technologies are widely used in Baosteel,where a full-time working team is making their effort in various topics for better qualities of steel products.In this paper,applications and new developments of EMS technology in Baosteel are mainly introduced.Although EMS has already become conventional means for improving steel billet/bloom and slab qualities,there still exist problems due to low efficiency or unsatisfactory application results.To solve these problems,not only the internal mechanical structure of the EMS equipments,but also the relationship between EMS and solidification process,physical properties as well as fluid mechanics should be carefully investigated. By using of computer simulation,laboratory and on-line experiments,our understandings of EMS technology have been upgraded based on the obtained results.For improvement of equiaxed crystal ratio,the magnitude of EMS force plays a much more important role than superheat.And the nonlinear relations between power source frequence and EMS force are quite different for different types of EMS equipments,which means adjustment of frequence to a proper value is very important.
