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!
Jominy Test:
Additionally convenient laboratory test for harden-ability is Jominy test. A standard test piece of steel as illustrated in figure of The Jominy Test of Harden-ability is austenitized in usual manner. The lower end of the test piece is then quenched via a standard jet of water, resulting in a varying cooling rate.
Figure: The Jominy Test of Hardenability
The cooling rate at the jet end is about 300oC/sec whilst such at the other end is about 3oC/sec. it varying rate of cooling produces a broad range of hardness along the length of Jominy test piece. A flat portion is ground beside the length and hardness measured at different points. The plot of hardness along the length offers Jominy index of harden-ability.
The best utilization of the Jominy curve is made via drawing a horizontal line consequent to hardness of the semi-martensite zone. The semi-martensite zone hardness is explained in Table no.11. The point where such line requires the Jominy curve calculates the distance from the quenched end that can be inserted in figure of calculating the Diameter of Fully Hardened Articles as per to the Distance from the Quenched End to find out the diameter for a particular steel that will be fully hardened in water or oil.
Figure: Harden-ability Curves Plotted from End Quench Test Data
a) For Shallow; and
b) For Deep Hardening Steel
Figure: finding the Diameter of Fully Hardened Articles as per to the Distance from the Quenched End
Table no.1: Relationship between the Hardness of the Semi-Martensite Zone and the Carbon Content
Carbon-content %
Hardness of the Semi-martensite (Rc)
Carbon Steel
Alloy Steel
0.08 - 0.17
-
25
0.13 - 0.22
30
0.23 - 0.27
35
0.28 - 0.32
40
0.33 - 0.42
45
0.43 - 0.52
44
50
0.53 - 0.62
55
About zeroth law of thermodynamics
design the bucket elevator
Calculate and draw the Shear force and Bending moment diagrams for the loaded beam and determine the maximum moment M and its location x from left end.
hiw can i fix the maximum temp of the aluminium
Registering a Small Scale Unit: Small Scale and ancillary units (i.e. undertaking with investment in plant and machinery of less than Rs. 6.0 million and Rs. 7.5 million respectiv
A 1.5m long column has circular cross-section of 5cm diameter. One of the end of the column is fixed in the position and direction and other end is free. Taking factor of safety as
1. Plot the functions x1 and x as functions of voltage 2. Assume that you hold the membrane potential V at -120 mV until the system reaches equilibrium (i.e. until dx=dt = 0, w
Time Dilation The measurement of time involves the concept of clocks attached at each position co-ordinate of a Lorentz frame. As a consequence of Lorentz transformations, it i
is there any other punch material for making cold forged nut except AISI M2
Hi I am new tutor here Pankaj kumar I got the mail for the verification and i regitered now . But how can i get the sample assignment for the further process.
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd