Usually people judge the hollow state of the steel shot by visually observing the appearance, and think that the quality of some empty shells is better than the quality of the empty shell; in fact, it is not necessarily true, because some shrinkage cavities, shrinkage porosity, and hollowness inside the steel shot often appear from the appearance. This kind of defect can be reflected indirectly through the density detection of the steel shot. The higher the density of the steel shot, the fewer internal defects of the steel shot and the better the quality. On the contrary, the worse the quality of the steel shot is. .
That is to say, the quality of the steel shot can be judged more accurately by the density of the steel shot;
Also take 100g of steel shot, pour it into a measuring cylinder containing 50ml of water, and read the volume change of the discharged water; calculate the measured density, and the steel shot with higher density is of better quality.
Therefore, the quality of the steel shot cannot be judged simply from the hollow appearance.
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