Surface cleaning and removal of titanium castings vent titanium sponge plant

Surface cleaning and removal of titanium castings vent
     When the mold is completely titanium alloy pump cooled, with a wooden hammer and other tools to gently tap the mold, so

that separation of titanium castings and materials, to be out most of the material to use after

blasting machine to remove titanium sponge plant adhering to the surface of titanium castings oxide film, the casting surface

showing silver.
    t a thin slice cut sprue and exhaust all channels, should pay attention to the cutting speed should not

be cut too fast to prevent titanium valve excessive heat titanium castings, affect performance.

The role of titanium ingot segregation effects Sunrui titanium valve

    Seen from the front , consumable arc melting , the solidification of titanium ingots from the bottom of

the ingot in the order gradually titanium valve to - wide solidification solidification process is in order. As a result,

some of the titanium alloy ingot impurity elements to different parts of the ingot are regularly distributed

, resulting in segregation effects. The principle of effective government is also purified metal smelting

area . It makes titanium ingots alloying elements or impurities in small ingots showing the distribution

area segregation.
    Segregation effect titanium tube occurs with titanium ingot ( or metal sticks ) impurities ( or alloying elements )

equilibrium distribution constant K0 relevant ; segregation effects arising after the gradual solidification

of the cash borrowed from the theory of a titanium ingots left to be addressed on that theory when the order

reported titanium ingot ingot solidification small impurity distribution diagram . The actual status of

titanium ingots similar.
    However , the rapid melting process flexor directional solidification process , the impurity diffusion

between the two phases in the shelter group can not reach equilibrium , so it's not a distribution constant

K0, segregation of some small effect . When titanium melting, segregation should be a purifying effect of

the role , as long as the use of light ingots , you can reduce the effects of impurities.
    Secondary smelting produce consumable content of impurities TA2 pure milled raw material ingot Table

relationship , which is the average of 100 titanium ingots . As can be seen from the table, iron , titanium

ingot and the nitrogen concentration of the titanium sponge has not changed , the purification effect of sky

; silicon, carbon and oxygen increased slightly , and no purification effect, but in the smelting process is

increased impurity contamination volume ; Lee hydrogen chloride purification obvious effect , do not hold

the product in a reduced number of chlorine and level . It also shows that the main role of vacuum

distillation . Both the total amount of impurities from the point of view , slightly lower than the titanium

ingot of titanium sponge impurities, titanium sheet by lowering the melting sponge drink chlorine , and slightly increases

the oxygen and other impurities. In short , a slight increase in the purity of titanium , but it remains in

a substantially horizontal magnitude .