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Why hardness of SS316 & 304 are not changed by heat treatment
vishalkunjir
- Mar 28th, 2009
Basically these SS 316 & SS 304 are Austenitic Stainless Steel i.e. These steel contains austenitic structure at room temperature. These steel cannot harden by any heat treatment, even after solution annealing structure is austenitc and this is the softest phase in Iron carbide diagram.
Ankit patel
- Feb 12th, 2007
As both of these have low carbon content ..so though we apply heat treatment ,there wiil not be much increse in hardness..it can be increased by caarburising or nitriding..
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Heat Transfer
You have two layer of material to provide insulation. They have heat transfer co-efficient (k1>k2). How will you obtain better insulation?
ronit_hansum
- Mar 17th, 2009
We use the material with low coefficient of heat transfer first then the material with high value of heta transfer coefficient
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How can mechanical engineering change lives of other people?
Usman Adil
- Feb 3rd, 2009
Very simple, A mechanical engineering is called a mother of all the fields. So today every individual is wanting three basic properties in each product ease, economy and strength. Ease relates to auto...
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Annealing, Normalizing, Carburizing
What is annealing, normalizing, carburizing w.r.t iron carbon equilibirium and also mention its temperature ranges.
Usman Adil
- Jan 30th, 2009
The explaination is same as mentioned above....But it should be noted that Annealing is used when we want ductility in material.Normalizing is used when we want hardness and carburizing is used when w...
mailmisterk
- Dec 11th, 2008
Annealing and normalizing are heat treatment techniques.in order to impart desired mechanical properties to the material heat treatment techniques are carried out. Annealing is the process of heating ...
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What is magneto rheological damper?
ksreenivasan02
- Jan 28th, 2009
A magnetorheological damper or magnetorheological shock absorber is a damper filled with magnetorheological fluid, which is controlled by a magnetic field, usually using an electromagnet.This allows t...
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TIG, MIG in Welding
Tungsten Inert Gas welding and Megnesium Inert Gas welding is used for which material welding and what are their advantages?
dv_rjn
- Dec 29th, 2008
Tig and Mig welding used for alloy steels and the process is cheaper, less spatters, more strength
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What is d pattern of placement paper of GODREJ??
sandipg22
- Nov 30th, 2008
There are two test, one is general inteligence test.In this test 40 questions you have to answer in 15 minall are objective types question , minimum passing is 24 marks.1 mark per correct answer quest...
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GIS services
Hi,Can anybody tell me few companies list which are in GIS services in Bangalore
vrsaikumar
- Nov 11th, 2008
Google Inc is the biggest GIS (Geographical Information System) provider in India..There is a plenty of openings in google and also other local companies who use GIS.. I came to know that some govt or...
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What is SMAW ?
SMAW means Sheilded Metal arc welding.
vrsaikumar
- Nov 4th, 2008
There are 2 types of metal arc welding... shielded metal arc welding and unshielded... OR we can also say as protected and unprotected, metal arc welding...SMAW is the the welding process which shie...
harikumar
- Mar 6th, 2007
hiSMAW: Shileded Metal Arc weldingIn smaw , the welding will be done by using electrodes. The selection of electrodes will be based on Parent metal that we are going to weld and strength of the weld m...
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Blank Size
Blank size is equal to size of punch in presswork.
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Mechanical Engineering Qualities
What important qualities in 3rd mellinium in engineering?Reason and effects
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BMD Diagram
for uniform strength of beam condition req.A. Depth constant, width increases.B. Depth increases, width decreases.C. Both should increase.D. All the above.E. None of the above.
dostmitra_05
- Jun 27th, 2008
Cross sectional area is to be decreased towards the support. this can be achieved by:a)keeping the depth constant and varying the widthb)keeping the width constant and varying the depthc)varying both the depth & width
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What are the methods of preparing the glass?
challawar_mayur
- May 13th, 2008
Generally the process of "annealing" is used in the manufacture of glass
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How to design a KOD?
In the field of oil@ gas? Have to separate natural gas from hydrocarbon? What should be my design criteria? What are the important points or notes to be remembered during its design?Why to use a particular formula, mean for what case?
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Explain about powder technology?
anoop03
- Jul 26th, 2007
The best example of powder metallaurgy is the cutting tools like insert you use for material removal.In this tungsten powders are compacted to the required shape and are then baked(sintered) at a tempertaure below its melting point to bind it.
Arun NArayanan
- Jul 16th, 2007
Powder technology involves the production of metal powders;compacting these powders to required shape by application of pressure and heat.Cu-Pb(cu and Pb dont mix in molten state) Bearings,tungsten(a refractory material) filaments,etc are prepared by powder mettalurgy.
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Mechanical Engineering Interview Questions
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