By measuring the pressure and piston stroke of hydraulic servo cylinders in the oscillation system of a caster mould,friction between mould and shell can be determined.The condition of solidified shell can be monitore...By measuring the pressure and piston stroke of hydraulic servo cylinders in the oscillation system of a caster mould,friction between mould and shell can be determined.The condition of solidified shell can be monitored by thermocouples fixed to the mould.Breakouts,whether caused by shell cracking,shell sticking or entrained impurities,can therefore be predicted and effectively avoided through monitoring the change characteristics of friction and thermocouples temperature during the process.展开更多
An introduction of the ongoing technology of argon-blowing purging plugs in China was presented in this work. Gel powders were used as starting materials to enhance the high temperature mechanical properties of the pu...An introduction of the ongoing technology of argon-blowing purging plugs in China was presented in this work. Gel powders were used as starting materials to enhance the high temperature mechanical properties of the purging plugs. Composite purging plug adopting extrusion formed gas-purging bar and slit had its surface structural design improved, which enhanced the resistances to thermal shock and molten steel penetration, prolonging the service life. In addition, the safety was greatly improved by upgrading the framework and production process, enhancing the resistance to breakout. It is indicated that the developing trend is to produce purging plugs of longer service life and better gas purging rate with different starting materials and structure designs to meet the requirements of various metallurgical processes.展开更多
文摘By measuring the pressure and piston stroke of hydraulic servo cylinders in the oscillation system of a caster mould,friction between mould and shell can be determined.The condition of solidified shell can be monitored by thermocouples fixed to the mould.Breakouts,whether caused by shell cracking,shell sticking or entrained impurities,can therefore be predicted and effectively avoided through monitoring the change characteristics of friction and thermocouples temperature during the process.
文摘An introduction of the ongoing technology of argon-blowing purging plugs in China was presented in this work. Gel powders were used as starting materials to enhance the high temperature mechanical properties of the purging plugs. Composite purging plug adopting extrusion formed gas-purging bar and slit had its surface structural design improved, which enhanced the resistances to thermal shock and molten steel penetration, prolonging the service life. In addition, the safety was greatly improved by upgrading the framework and production process, enhancing the resistance to breakout. It is indicated that the developing trend is to produce purging plugs of longer service life and better gas purging rate with different starting materials and structure designs to meet the requirements of various metallurgical processes.