Question

The die life is less for higher melting temperature alloys in gravity die casting.

(a) True

(b) False

I had been asked this question in an interview.

This interesting question is from Gravity Die Casting topic in section Special Casting Techniques of Casting-Forming-Welding I

Answer 1

Correct choice is (a) True

To explain I would say: The die life is less for higher melting temperature alloys such as copper and grey cast iron. Very high temperature of molten metal in contact with the moulding surface damages it and may cause surface erosion. This can be avoided by using die material of highly resistant to the temperature of molten metal.