汽车曲轴用钢夹杂物分离阶段的研究

Study on inclusion separation stage of steel for automobile crankshaft

为了探索夹杂物分离阶段的影响要素,研究不同的造渣材料及渣系中不同的Al2O3含量对于夹杂物分离的影响。结果表明:石灰和精炼渣三元渣系与石灰和萤石的二元渣系相比,渣系熔点低流动性强、表面张力大、对夹杂物的溶解速率快,对于夹杂物的吸附能力强,因此在生产纯净度要求严格的钢水时,必须使用石灰和精炼渣三元渣系。同时随着渣系中Al2O3含量增加,CaO/Al2O3达到1.60-1.80之间,炉渣表面张力加大,对于夹杂物的溶解速率加快,更容易将夹杂物分离出来。

In order to explore the influencing factors of inclusion separation stage, the influence of different slagging materials and different Al2O3content in slag system on inclusion separation was studied. The results show that compared with the binary slag system of lime and fluorite, the ternary slag system of lime and refining slag has lower melting point,higher fluidity, higher surface tension, faster dissolution rate of inclusions, and stronger adsorption capacity for inclusions.Therefore, the ternary slag system of lime and refining slag must be used in the production of molten steel with strict purity requirements. At the same time, with the increase of Al2O3content in slag system, CaO/Al2O3reaches between 1.60and 1.80, the surface tension of slag increases, and the dissolution rate of inclusions is accelerated, so it is easier to separate the inclusions.