A typical heat treatable engineering steel used for gears and has a
composition of: 0.2 % C, 1.1% Mn, 1.1% Cr. What technique would you use to
determine the hardenability of this new steel?
Vickers Hardness Testing - incorrect, this technique measures the hardness of the material not the
hardenability. Try again.
Brinell Hardness Testing - incorrect, this technique measures the hardness of the material not the
hardenability. Try again.
Jominy End Quench Test - Correct.
Thermodynamics Computer Prediction - incorrect, thermodynamics deal with equilibrium conditions, hardenability
refers to the ease with which a steel can be hardened (i.e. form martensite)
which is a non-equilibrium process. However, computer methods are available for
predicting hardenability from chemical composition. Try again.
Try again.
Try again.
Click on your answer to check and make a note of the answer on your notepad.
If you have not already reviewed the section on hardenability do
so now by clicking here
NOTEPAD
Three most important properties for an engineering steel for a gear in an
automotive gear box: Surface Hardness, Wear Resistance and Fatigue Resistance
Technique used to determine the hardenability of a steel: Jominy End Quench
To
obtain more detailed information about the hardenability of a steel
and the required processing to obtained certain properties transformation
diagrams are used. It is time consuming to generate a new
transformation diagram but there are many available for existing steel
grades.
A typical heat treatable engineering steel used for gears and has a
composition of:
Vickers Hardness Testing - incorrect, this technique measures the hardness of the material not the
hardenability. Try again.
Jominy End Quench Test - Correct. 
