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

Define what is the minimum temperature for stress relieving of astm a 519 gr.4130 material and please tell us where we can find the location.

0 Answers  

---

Explain rupture stress

0 Answers   NIC,

---

What is iron ferrite?

0 Answers  

---

Why post-heating is done in alloy steel welding?

0 Answers  

---

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

0 Answers   NIC,

---

When using mercury to recover very, fine gold from ore, define what is the best way to separate the gold laden mercury from the ore?

0 Answers  

---

any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material.

0 Answers   Novellus,

---

How do you classify shapers?

0 Answers   Essar,

---

Do you know define what metal might be considered the “most environmental”? I say aluminum because it can be recycled others on my team say brass.

0 Answers  

---

Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron?

0 Answers  

---

what are metallurgical microscopes?

0 Answers  

---

Discuss the otto cycle with diagram.

0 Answers   Essar,

---