THE INNOVATIVE DESIGN OF AUTOMATIC CASTING PROCESS FOR CONTINUOUS CASTING LADLE BASED ON TRIZ THEORY
Bearing steel is a widely used manufacturing material in the field of mechanical equipment.In recent years,the high-quality development of China's manufacturing industry has put forward higher requirements for the fatigue life and quality stability of bearing steel.The residual inclusion in steel will cause internal cracks,reduce the service life,cause the steel fatigue break,increase the manufacturing cost,and become a problem for the engineering technician of steel enterprise.Therefore,one of the key factors of lifting fatigue life and quality stability of bearing steel is the control of inclusion in steel.Based on TRIZ theory,this paper aims at the problem of inclusions produced in the production of high quality bearing steel,combining with the production process of high-quality bearing steel,and then the process function model was established.After cutting the corrective function and the insufficient performance function in the process function model,two solutions were obtained.By making full use of TRIZ tools such as ideal solution analysis,technical conflict and physical conflict,three solutions are obtained.According to the comparison of evaluation models,the optimal scheme is skateboard with bottom blowing hydrogen function.By blowing hydrogen into the ladle through the slide plate,the triple functions of stirring uniform molten steel,non-alloyed hydrogen deoxidization of molten steel and preventing condensation of molten steel in the ladle nozzle can be realized,so as to solve the traditional non-metallic inclusions caused by alloy deoxidization and the traditional drainage sand pollution of molten steel.
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