Casting Shrinkage And Shrinkage Defects, Experts Give 10 Points Analysis (Ⅰ)
Shrinkage and shrinkage are common casting defects in foundry production. Shrinkage is a pore that shrinks during the condensation process and cannot be replenished with a metal solution. It has an irregular shape and a rough wall, and is generally located at the hot joint of the casting. Shrinkage and stomata are often very similar in appearance and are often easily confused. Generally speaking, the inner wall of the pores is smooth, while the inner wall of the shrinkage pores is the tip of a branched crystal. (A) Open shrinkage (b) Angle shrinkage (c) Core shrinkage (d) Internal shrinkage Shrinkage is the formation of scattered and fine pores in the last solidified area of the casting without the shrinkage of the metal solution. It often appears at the thicker sections of the casting and at the junctions or thick nodes of the thick and thin sections. The shrinkage distribution area is much larger than the shrinkage holes, and it is often hidden inside the casting, sometimes not ...