Interested to Buy Any Domain ? << Click Here >> for more details...
Why same casting has different hardness and machineability
properties? One spot it is found hard for machining and
another spot soft? It is FG 260 grade for Cast Iron.
- 4 Answers
- 9002 Views
- I also Faced
- E-Mail Answers
Answer Posted / 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.
| Is This Answer Correct ? | 11 Yes | 3 No |
Post New Answer View All Answers
Give example of heterogeneous systems.
The requirement for ASTM A217 Gr. WC9 castings for valves components like Body and Bonnet were Normalising at 920+/- 20 Deg. C and Tempring 780+/- 20 Deg. C The specification calls furnace shall be calibtated within +/-14 deg. C The Heat Chart shows minimum temperature for normalising 900 to 920 Deg. C, but maximum temperature 960-990 Deg. C Tempering 780+/-20 Deg. C is within limits and accepted. Casting having integral test bars, heat trated along with castings passed in chemical znalysis and mechanical properties. Since normalising maximum temperature is not meeting specification, where castings can be salvaged or renormalised and retempered to meet specification. Whether it will have affect on remechanical properties testing
Differentiate between ferrite percentage and ferrite number?
For the same part, it is possible to Specify the two different type of Hardness with same scall(EX-Quenching and tempering==>450 to 500HV30 & Hardening and Austempering 330- 380HV30)
i want to go to US for Bachlore of computer science, I didn't appeared for SAT. my ielts scores are too low only 5.5 band and I am confused if VISA OFFICERS will ask why u hadn't given SAT. what i have to answer pl suggest?
What is the hottest part of flame in fire?
What are the advantages of projection welding over spot welding
Explain cementite?
I currently use 17-7 PH stainless which is hardened to condition CH after forming. raw matl is .1.75"X .12" X .008". Its main usage after hardening is silicon wafer retainer where it's contantly cycled up and down to putin and remove wafer after 40-60 sec process at 400C temp. At this high temperature this part seemed to deform after a a couple of hundred wafer which is what it was designed for in the first place. THere is a proposal to go to a different material to increase lifeline of this part. My question is..... can 321 SST be a plugin replacement. I know this has a higher temp rating but how about its forming characteristics, will it have spring properties, and wont become brittle after prolonged exposure to 400C.
What is the use of core prints?
Discuss steam engines. What is its overall efficiency ?
What Is cold working of metals? Give some of its principal methods.
What is the melting point of e70 steel, 304,308,316 stainless steels?
What is d2? What is it used for?
What is recrystallization?
