It demonstrated that the experiment of hardness is likely to upset in the experiment of compression. Hardness tester indenter make matrix metal plastic deformation and viscous flow happen.
2
得出的结轮是提高压头压下速度能提高砂型表面硬度。
Thus we got a conclusion that increasing the velocity of pressing can increasing the hardness of sand mould surface.
3
该种检测方法与现今采用的各种硬度检测法的负荷大小及金刚石压头均有所不同。
It is different from the various methods adopted now in the number of weight and the diamond cone.