نوع مقاله : مقاله پژوهشی
گروه پژوهشی متالورژی، پژوهشکده توسعه ی تکنولوژی جهاد دانشگاهی
عنوان مقاله [English]
Using a Chill Block Melt Spinning (CBMS) apparatus, the effect of melt spinning parameters on the dimensions and appearance
of melt-spun Ni-38Co-8Fe-8Si-2B ribbons, was investigated. Four series of melt spinning experiments were carried out under an argon atmosphere, during each of which only one parameter varied while the others were kept constant. The parameters examined included; wheel linear speed, melt ejection pressure, nozzle angle and nozzle orifice diameter. The width of ribbons was found to increase with an increase in nozzle orifice diameter, wheel speed (at low roll speeds), nozzle angle and ejection pressure, whereas, their thickness directly corresponds to the nozzle orifice diameter and ejection pressure and, inversely, to wheel speed and nozzle angle. At high roll linear speeds, the variation of ribbon width with roll speed is not significant. The production of high quality melt-spun ribbons with desirable dimensions demands, not only precise control of each individual parameter within its range, but also consistency among all parameters.