In addition, the same furnace products out, the standard sample bar is qualified, no hole, but YT14 blade has more holes, why is that ah?
YT14 Feiyan containing titanium, titanium with high oxygen affinity, if high oxygen content and sintering process not reasonable, high temperature gas production could not be drained to form holes, you see the sintering process is reasonable, the presence of liquid phase before the vacuum degree is not high enough. In addition, such as incomplete degassing holes in the product, the edge is more.
YT14 alloy you said, if the above holes can start from the following aspects, 1, raw materials, dirty and high oxygen content, impurity content, sintering, 2.If the hole shape of the dirty and dirty, you can see some holes around a circle with cobalt layer, small holes are filled with cobalt, cobalt pool formation, if not pressure, hole like narrow shape.
Too many factors, but according to the shape, size, number and distribution state can be roughly determined what caused by links.
