【摘要】 利用金相和电子探针研究Si-Ca-V等复合脱氧剂脱氧的重轨钢夹杂物的形态及其组成。分析结果表明,复合脱氧剂使钢中不规则及链条状夹杂物变为球形,同时,其组成也发生了变化,由坚硬的Al₂O₃变成以尖晶石为核心,为硫化物或硅酸盐所包围着的球形复合夹杂物。实验表明,钢的接触疲劳寿命直接与夹杂物的性质和形态相关,球形复合夹杂物提高了钢的疲劳寿命。更多还原

【Abstract】 The morphology and composition of inclusions in rail steels treated with complex deoxidizers such as Si-Ca-V etc. were studied by metallography and EPMA. The results show that the deoxidizers can change the morphology of inclusions in steel from irregular chain-like into spherical and at the same time the A1₂O₃ inclusions are replaced spherical complex inclusions with a core of spinel surrounded by sulphides or silicates.The result shows that the contact fatigue life of rail steel is directly related to property and morphology of inclusions and can be improved by modifying the inclusions into spherical complex form.更多还原