声速法用于炉前控制的初步探讨球墨铸铁的炉前控制,目前主要凭操作者的经验,其准确性往往因人而异。为此1980年我们对声速法用于炉前控制作了一些探讨性试验。炉前试样采用潮模立浇三种直径的圆棒和横浇两种尺寸的三角试块,在凝固后约6、7百度时水淬,除去粘砂,试样两端用砂轮粗磨后进行声速检测.由于 Sound velocity method for pre-furnace control of the furnace before the ductile iron control, mainly by the operator’s experience, its accuracy often varies. To this end in 1980 we made some exploratory tests on the sound velocity method for furnace control. Sample before the furnace using tidal mold vertical pouring three kinds of diameter round bar and horizontal pouring two sizes of triangular test block, about 6,7 Baidu after coagulation water quenching, remove the sticky sand, both ends of the sample with a coarse grinding wheel After the sound velocity detection