taotao

  The   silicon nitride crucible  used in casting is an important vessel in the process of melting and casting, and its performance directly affects the quality of liquid metal and the finished product of castings. In order to ensure the stability and reliability of the silicon nitride crucible in the casting process, it is particularly important to evaluate and characterize the performance of the crucible.     Appearance quality assessment Appearance quality evaluation is the first step of performance evaluation of silicon nitride crucible. Mainly check whether the surface of the crucible is smooth, there are no obvious defects (such as cracks, sand holes, pores, etc.), and whether the color is uniform. The inner and outer walls of the crucible should be carefully inspected to ensure the overall quality of the crucible.   Size detection The size test mainly evaluates whether the geometric size of the crucible meets the design requirements. Including the cr...