自1953年开始,我们对钢铸件采用了赤铁矿粉砂的潮模铸造.三年多来在原有设备基础上已有70%以上的铸件推行了潮模.1956与1953年相比,钢铸件产量已提高一倍多,成本也降低30%以上.但是潮模铸造还存在铸件表面光洁度不高问题.潮模浇注的一般铸件尚能达到烘模铸件的光洁度.但对车辆上使用的摇枕、侧架等,则较难达到要求光洁度.在目前质量要求日益提高的情况下,便成为生产上的关键问题.几年来我 We have used tidal casting of hematite silt for steel castings since 1953. Over the last three years, more than 70% of our castings have been marketed as tide molds. In 1956, compared with 1953, Casting production has more than doubled, the cost is also reduced by more than 30%. However, there is still casting mold surface finish is not high. Casting tidal mold castings can still achieve the general castings finish. However, the use of vehicle shake Pillow, side frame, etc., it is more difficult to achieve the required finish.In the current quality requirements are increasing, it has become a key issue in production. Over the past few years I