WorksheetsChapter 7: Heat Treatment (Hardenability & Surface Hardening
Total questions: 6
Worksheet time: 3mins
Identify the size of the standard bar for Jominy End Quench Test.
Length = 200 mm; Diameter = 25 mm
Length = 100 mm; Diameter 50 mm
Length = 100 mm; Diameter = 25 mm
Length = 200 mm; Diameter = 50 mm
Complete the labeling for the the figure.
i - 100 mm
ii - 25 mm
iii - 12.5 mm
iv - 27 o C
v - 25 mm
i - 100 mm
ii - 12.5 mm
iii - 12.5 mm
iv - 24 o C
v - 25 mm
i - 200 mm
ii - 25 mm
iii - 12.5 mm
iv - 27 o C
v - 25 mm
_______________________ can be defined as a heat-treating process which creates a thin wear resistant layer on the outer surface of a material while permitting the inner core of the material to remain soft and ductile
Surface hardening
Surface quenching
Hardenability
I - After carburising, a secondary heat-treating step is employed to cause the hardening action.
II - Heating material to austenization temperature
III - Bringing a carbon-rich material into contact with the steel.
IV - This forms a carbon-rich layer or case which is capable of being heat treated to a very hard condition. (Fe3C2 )
V- The carbon atoms are enticed to move from the carbon rich material into the outer surface of the steel parts.
VI - It should be emphasized that the addition of carbon to the surface does not cause hardening directly.
III - II - V - IV - VI - I
III - II - V - VI - IV - I
III - II - VI - V - IV - I
Select the carbon-method for the following:
(Multi-answer)
Pack
Gas
Liquid-Carbon Nitriding
Liquid
Cyaniding
Subzero treatment should be carried out immediately after hardening the components. Re-arrange the heat treatment procedure of the following:
I - Sub-zero treatment
II - Carburise
III - Tempering
IV - Harden
I - IV - II - III
II - IV - I - III
II - IV - III - I
