Question

What should be the range of pressure (in MPa) under which molten metal is pressed to form the castings by squeeze casting method?

(a) 10 to 50

(b) 50 to 140

(c) 140 to 240

(d) 240 to 300

I got this question in a national level competition.

I'm obligated to ask this question of Squeeze Casting topic in division Special Casting Techniques of Casting-Forming-Welding I

Answer 1

The correct option is (b) 50 to 140

To explain I would say: In squeeze casting, the punch portion of the upper die is forced into the cavity by displacing the molten metal under pressure until it fills the annular space between the die and the punch. Normally, the metal is kept under pressure of 50 to 140 MPa to avoid the formation of shrinkage defects.