Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following materials is mostly used as a die material in gravity die casting?

Which of the following materials is mostly used as a die material in gravity die casting? Correct Answer Grey cast iron

In gravity die casting, fine-grained grey cast iron is the most generally used die material. Sometimes alloy cast iron, alloy steels (H11 and H14) and C20 steel are also used as die material for very large volumes and large parts. For small volume production of aluminium and magnesium, mould made of graphite is preferred.

Related Questions

Consider the following statements. (1) Hot chamber machine is used for casting zinc, tin and other low melting alloys (2) Cold chamber machine is used for die casting of ferrous alloys (3) Rapid cooling rate in die casting produces high strength and quality in many alloys Which of these statements are correct? 
A 250 mm by 250 mm ingot casting, 1.5 m high and at 1225 K temperature, is stripped from its mold. The casting is made to stand on end on the floor of a large foundry whose wall, floor and roof can be assumed to be at 300 K temperature. Make calculation for the rate of radiant heat interchange between the casting and the room. The casting material has an emissivity of 0.85
Consider the following statements: 1. Both ferromagnetic and ferrimagnetic materials have domain structures; each domain has randomly oriented magnetic moments when no external field is applied. 2. Both ferromagnetic and ferrimagnetic materials make those domains that have a favourable orientation to the applied field grow in size. 3. The net magnetic moment in ferromagnetic materials is higher than that in ferrimagnetic materials. 4. The net magnetic moment in ferrimagnetic materials is higher than that in ferromagnetic material. Which of the above statements are correct?
In die casting technique, a single metallic die is used for the production of casting components.
The casting processes that require expendable moulds are
P. Investment casting
Q. Low pressure casting
R. Shell moulding
S. Slush casting
Refractory materials are basically used for strengthening the casting materials used in the casting process.
Which of the following is a limitation of die casting, but is overcome in vacuum die casting?
Which of the following problems arises in die casting that can be solved by having vacuum die casting?
Consider the following statements regarding hysteresis loops of hard and soft magnetic materials: 1. Hysteresis loss of hard magnetic material will be less than that of soft material 2. Coercivity of hard material will be greater than that of soft material 3. Retentivity of the two materials will always be equal Which of these statements are correct?
Better surface finish with the close dimensional tolerances of the casting can be obtained in gravity die casting.