贵州工学院研制的稀土复合孕育铸铁管应用技术,将提高灰铁管质量。对LA级壁厚铸管,水压试验压力可达3.5～4.OMPa;管环抗弯强度平均值为400 N/mm~2;并具有性能稳定、数据波动小的特点。铸管的韧性有明显改善。本复合孕育剂用量少,来源容易、对铁水成分波动适应能力强、除适用于灰铁连续铸管外,还可适用于铸铁锅、暖气片生产。 Guizhou Institute of Technology developed rare earth composite cast iron pipe application technology, will improve the quality of gray iron pipe. For the LA-class wall thickness cast pipe, the hydrostatic test pressure can reach 3.5 ~ 4.OMPa; the average bending strength of the pipe ring is 400 N / mm ~ 2; and it has the characteristics of stable performance and small data fluctuation. Ductility of castings has been significantly improved. The compound inoculant with less dosage, easy source, strong adaptability to fluctuations in the composition of hot metal, except for gray iron continuous casting, but also for cast iron, radiator production.