RU2000110989A - METHOD FOR CASTING WITH CRYSTALLIZATION UNDER PRESSURE - Google Patents

Claims (1)

A method of casting with crystallization under pressure, including applying a lubricant to the mold, pouring the melt into the die, forming a high-pressure die casting, raising the die, supplying cutting fluid to the die in the die, and removing the die from the mold, characterized in that the crystallized casting is cooled with a refrigerant through a punch, upon completion of the solidification of the casting, the pressing pressure is lower than the σ _s -yield strength of the alloy under compression for high temperatures and the core is set time lag for cooling the casting and punch, in closed form, determined from the ratio:

where r $\genfrac{}{}{0ex}{}{\text{P}}{\text{max}}$ - the maximum height of the surface roughness of the punch, m;
R _p - the radius of the punch, m;
N _p - the height of the punch, m;
K _p - the coefficient of cooling with a water-air mixture (moist air) of the material of the punch;
Q _in - the amount of water in the second flow rate of compressed air, kg,
after lifting the punch, the supply of cutting fluid along the perimeter of the casting in the matrix, for a time determined from the ratio:

where r $\genfrac{}{}{0ex}{}{\text{m}}{\text{max}}$ - the maximum height of the surface roughness of the matrix, m;
R _{about the} radius of the casting, m;
m _{about the} mass of the casting, kg;
K _about - coefficient of cooling with a water-air mixture of cutting fluid of the casting material;
Q _BP - the amount of water in the second flow rate of the cutting fluid, kg;
n _T is the coefficient of actual participation of the cutting fluid in the heat transfer, n _T = 0.5-0.6.