Using finite element software ANSYS to numerically simulate the filling mould process of shock absorption cylinder, the distribution and changing rule of velocity field and temperature field, it can provide important basis to predict and prevent the defects like cold shuts, as well as lower waster ratio, further, the obtained velocity field can be regarded as start condition in the process of simulating the solidification.
According to double cast systems designing, side-riser compensating shrink and casting in high temperature, it is good for filling mould, avoiding cold partition and other flaw, improving finished product rate of castings.
The U-shape interface and the casting defects such as misrun and cold lap can be avoided by the increase and scatter arrange of consumable electrodes or the relative moving between electrodes and a crystallizer.
Ingot quality influences the property of alloys significantly. The common defects in cast ingots are shrinkage cavity, gas hole, crack, segregation, cold lap and copper sweat during the Cu-Cr-Zr vacuum melting and casting.
For eliminating the defects of double skin,cold lap and gas hole,etc. of nodular cast iron pipes casted by centrifugal water cooling metallic mould and improving the mechanical wear and hot fatigue of pipe mould,adopts the method spraying SiBa 13 alloy powder to internal surface of pipe mould.
为了消除水冷金属型离心球墨铸铁管的重皮、冷隔、气孔等铸造缺陷 ,降低管模的机械磨损及热疲劳 ,采用了向管模内喷撒 Si Ba-13合金粉的方法。
The results indicated that the bulk flat plates with the interfaces with firm combining strength and proper thickness of transitional layer have been obtained, without defects such as U-shaped interface, cold lap, by relative moving between electrodes and crystallizer.