Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Quenching and Tempering
Cast iron pearlite structure might be heated to lower critical temperature and after that quenched to effect extremely rapid cooling. This treatment reasons the precipitation of hard martensite phase and casting is hence capable of giving high wear resistance. The casting behind quenching treatment might be further heated to 300oC and cooled gradually to restore original toughness.
Surface Hardening
A lot of applications of cast iron demand high surface hardness. This might be attained by surface hardening treatments as like: induction and nitriding hardening.
Table: Typical Mechanical Properties and Applications of Cast Iron
Cast Iron
Composition wt. %
Condition
Structure
UTS MPa
YS MPa
Elongation
(%)
Typical Application
Gray Cast
Iron
Ferrite
3.4 C,
2.2 Si,
0.7 Mn
Annealed
Ferrite matrix
180
-
Cylinder blocks and head clutch plates
Pearlite
3.2 C,
2.0 Si,
As-cast
Pearlite matrix
250
Truck and tractor cylinder blocks, gear box
3.3 C,
290
Diesel engine castings
Melleable
2.2 C,
1.2 Si,
0.75 Mn
Temper carbon and ferrite
345
224
10
General engineering service machinability
2.4 C,
1.4 Si,
Temper carbon and pearlite
440
310
8
General service with dimensional tolerance
Martensitic
Quenched and Tempered
Tempered martenstie
620
438
2
High strength parts, connecting rods, yokes for universal joints
Ductile
3.5 C,
2.2 Si
Ferritic
415
275
Pressure casting as valve and pump bodies
Ferritic pearlite
550
380
6
Crank shaft, gears and rollers
830
Pinions, gears, rollers and slides
Tank Drainage A large open vertical tank has three small, smooth, well-rounded orifices spaced equidistantly at ¼ h , ½ h , ¾ h up from the bottom of the tank (Fig. Q1). Water
Mash stitch welding An overlap of about 1.15 mm is kept and then the plates are squeezed flash by application of pressure at hot condition. Mash stitch welding is used in the
Overhead Bridge Crane Figure below shows a jib crane. In this type of crane the hook can move in a circular path. A jib crane is preferred where lifting of the jobs is requ
Laser-induced breakdown spectroscopy (LIBS) is a type of spectroscopy that uses plasma generated by a laser pulse. A schematic of a LIBS system is shown in the figure. The laser is
Q. Explain the procedure of Rockwell hardness tests? Rockwell hardness tests per ASTM of the deposited weld, and heat affected zone shall be required for procedure qualificatio
Globular Transfer Globular transfer is characterised by a drop size of greater diameter than that of the electrode wire. The large drop is easily acted on by gravity, generall
Define Milling Cutter - Geometry of Cutting Tool Out of large verity of milling cutter used in milling cutter used in milling practice, two types of cutter chosen to describe t
ACSR (Aluminium Conductor Steel Reinforced) are used as (A) over head transmission lines. (B) super conductors. (C) fuse (D) underground cables.
What do you understand by straight line mechanism ? Describe with a neat sketch the working and construction of any three types of straight line mechanism. Derive a mathematical
Copper-Nickel Alloys Complete solubility arises between nickel and copper. All alloys have same microstructure and may be cold or hot worked. Cupro-nickel also termed as Ge
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd