球化剂的筛分取样如方法使用不当,将导致结果错误。在钢钵中捣碎缩分后的试样,通常是分批取少量试样来研磨,对中间合金一般要求250目以上的细粉。留在筛上的试样要进行再研磨,重复多次,直至所取试样全部通过,绝不能一次过筛,弃去筛上的部分,那是错误的(见表)。由表看出,不同筛目的一次过筛(弃去筛上的部 Nodulizer sieve sampling, such as improper use of methods, will lead to the wrong results. Broken in the steel mortar after the sample, usually a small amount of sample taken to grind, the middle alloy generally require more than 250 mesh powder. The sample left on the sieve should be reground and repeated several times until all the samples taken pass, must not be sifted once and discarded to the part on the sieve, which is wrong (see table). It can be seen from the table that different sieves are screened once and for all