当为进行浇铸而熔炼每一炉铝时,为测定铝晶粒细化效果,发展了一种快速、简单、精确和易于掌握的试验方法。这种新的试验方法不仅只需一般检查晶粒度方法所需的五分之一的时间,同时还能为铸件和轧制品的生产厂提供大大改进铸造生产质量的方法。这种方法和所使用的设备比用从热的试样顶部切取的园柱体或从急冷试祥上切取的截锥体做试验所用的方法与设备简单得多。这种设备仅由一到四个安在熔凝氧化硅座上的铁环所组成。这些环的直径为三英寸,高为一英寸。铝融体试样直接浇铸在铁环 When smelting each furnace of aluminum for casting, a rapid, simple, accurate and easy-to-grasp test method was developed to determine the effect of aluminum grain refinement. This new test method not only requires one-fifth of the time required for a general inspection of the grain size method, but it also provides casting and rolling mill manufacturers with a way to greatly improve the quality of their foundry production. This method and the equipment used are much simpler than the methods and equipment used to test cylinders cut from the top of hot samples or from truncated conical sections. This device consists of only one to four iron rings mounted on fused silica seats. These rings are three inches in diameter and one inch high. Aluminum melt sample cast directly on the iron ring