Aluminum rod casting speed is under water leakage

Answer:

metal boundary area: metal block 2 metal block boundary area 12 timesThe grain size of the alloy decreases by grain size, the grain boundary area increases by one time, the grain area per unit area decreases by several times

surface uniformity of alloy elements play words more alloying vessels can reach full use of resources on grain refinement, increased grain boundary area, increase the uniformity through calculation of surface elements and metal blocks 1 and 2 which assuming the same volume of V by solid grain the metal piece 1 grain side 2A2 side a metal block 1 block 2 grain boundary area:

Grain refinement Aluminum Alloy casting process to solve important halo pores, coarse grain, bright crystal, feather crystal, casting defects such as crack effect measures are non crystalline alloy casting balance of impurity elements (including alloy elements) the vast set of cloth grain boundary grain is grain boundary area more impurities (or Jin Yuansu) even more impurity words to reduce the damage of high uniformity and even small amounts of impurities and variations of alloy elements;