To improve the liquid metal is poured medical grade titanium

Titanium and titanium alloy precision casting foundry in magnetic

To improve the liquid metal is poured into the mold but also by the pressure of the electromagnetic 

force to the liquid metal up to titanium alloy bar‍ achieve this is to magnetic casting. Its basic principle is the 

magnetic pump installed in the runner through the outer liquid metal to create a magnetic field; 

while the DC also introduced into this already established metal flow field, in the alternating 

magnetic field and electric field, forming a liquid metal flow of the same direction and the 

electromagnetic force, thereby increasing the pressure of the liquid metal filling the mold. This 

approach allows the flow rate of the metal in the cavity only by the flow rate of the sprue in the 

ram effect of the metal is increased from 2 to 2.5 times higher than the stationary casting. When 

using this method has several casting should be noted:

1 After pouring liquid metal into the runner must maintain the continuity of the metal flow, the 

middle can not stop there. So we must pay great attention to the runner to select the size of the 

design and the electromagnetic titanium spring wire‍ pump and current values.

2 magnetic pump should be placed as far as possible at the level of the runner, but this system can 

reduce the consumption of casting metal.

3 the mold is filled to a pressure of liquid metal in a magnetic pump is carried out at 0.01 ~ 

0.05MPa, so as to ensure that the liquid metal in the cavity to achieve the required flow rate, 

appears in the middle to avoid drying. After the mold is filled, magnetic pump pressure should be 

increased to 0.12 ~ 0.3MPa, in order to improve the casting feeding capacity to prevent the 

emergence of casting porosity.

4. gating system should be designed so that in the magnetic pump liquid metal within this part of 

the runner in the final solidification, which must be strictly established following the freezing 

order: Casting - Other gating system - the magnetic pump runner, because pressure magnetic pump 

liquid metal in a mold and then built into the magnetic pump can only be maintained in the liquid 

metal before the runner did not solidify. Cast researchers using this method in the lost wax cast 

ceramic shell leaves the body length of up to 260mm alloy compressor blades. Pouring liquid metal 

filling the cavity at a pressure blade solenoid pump condition 0.035 ~ 0.04MPa conducted under. This 

ensures that the flow rate of the molten metal in the cavity reaches 1.4 ~ 1.7m / s, thus ensuring 

the cast surface is not cold flow medical titanium plate‍ leaves the flow marks, good forming. This solves the centrifugal 

casting leaf blade is twisted body, the presence of cold traps and loose, the pass rate leaves the 

problem of low utilization factor and metal casting surface.‍