Answer / anil kamat

If it is a free flow single gate single runner casting then
the density variation leads to the diffrence in properties
across various sections. To get uniform density variation
usually pressure flow multigate multirunner castings are
preferred.

Answer / preethi

uneven solidification results in different grain size and
that leads to the difference in hardness. the surface of the
cast will have finer grains due to faster solidification
(comparatively high temperature gradient) than the core.

Answer / shashikant g. sane

The casting must have solidified with uneven cooling rates.
So the part that has cooled faster has developed extra
hardness.

Answer / hardik

due to segrigation

What are carbides?

0 Answers  

---

does any one has gate solutions of 2007,08,09 metallurgical engg papers?

0 Answers  

---

what is the difference between digital signal and discrete signal?

1 Answers  

---

On what Purpose helical gears are used?

0 Answers   NIC,

---

What happens to the microstructure during service exposure?

0 Answers  

---

Why do the Gamma Prime and Gamma Double Prime phases play such an important role in promoting strength in the superalloys?

1 Answers  

---

Is it possible to use metallurgical inverted microscope to other designation?

0 Answers  

---

what happens when hot liquid falls on water and why?

3 Answers   Mannar Company, TATA,

---

The Hardness of wheel(or)grade of wheel refers to the

0 Answers   NIC,

---

How much gold is in a troy ounce?

0 Answers  

---

What is tack welding ?

0 Answers   Essar,

---

What are allotropes? What are the allotropes of iron and carbon?

0 Answers  

---