从安息角测试结果可以看出，2#和9#钎剂的自由落体角度最小，其流动性最好，这和粒度分布结果相对应。因此在制备药芯焊条用钎剂时，必须保证适量的粉体粒度比，以保证粉体拥有足够好的流动性，便于填充药芯缝隙。（1#~9#详细说明见附件）

From the angle of repose test results, it can be seen that the free fall angle of the 2# and 9# fluxes is the smallest and the fluidity is the best, which corresponds to the particle size distribution results. Therefore, when preparing flux for flux-cored electrodes, it is necessary to ensure an appropriate amount of powder particle size ratio to ensure that the powder has sufficient fluidity and is convenient to fill the gap of the flux core.（1#~9# See the attachment for details）