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通过泡沫载体的引载作用实现TiC增强颗粒混入钢液,在液态模锻工艺条件下成型20%TiC/铸钢(ZG270-500)制件。计算分析了泡沫载体消失气化时TiC增强颗粒在气隙中的运动行为及其进入钢液的条件。实验结果表明,TiC增强颗粒的运动速度随浇注温度、充型速度和排气孔口与型腔横截面积比的增大而递增。当钢液前沿TiC颗粒的运动速度大于临界速度时才能进入钢液,且TiC增强颗粒运动速度越大,越容易进入钢液,分布越均匀。
TiC reinforced particles are mixed into the molten steel by the supporting effect of the foam carrier, and 20% TiC / cast steel (ZG270-500) parts are formed under the condition of liquid forging process. The kinetic behavior of TiC particles in the air gap and the conditions of their entry into molten steel were calculated and analyzed when the foam carrier vanished. The experimental results show that the moving speed of TiC particles increases with the increase of pouring temperature, filling speed and the ratio of exhaust port to cavity cross-sectional area. When the moving velocity of TiC particles in the front of the molten steel is larger than the critical velocity, it can enter the molten steel. The larger the moving velocity of TiC particles, the easier it enters the molten steel and the more uniform the distribution.