The heat treatment of a mechanical component increases its _____
a. Strength
b. Porosity
c. Wear resistance
Only a)
a) and b)
a) and c)
b) and c)
Heat treatment is carried out to ________ of materials.
a. relieve internal stress
b. improve machinability
c. decrease softness
Only a)
a) and b)
a) and c)
b) and c)
Which one of the following is NOT a part of the heat treatment process?
Heating
Soaking
Evaporation
Cooling
In tempering heat treatment, the cooling is always carried out in _____.
air
water
oil
vacuum
Which of the following is NOT used as a shielding gas in Laser Surface Hardening?
helium
hydrogen
nitrogen
carbon dioxide
Which of the following is NOT a step involved in Laser surface alloying?
deposition of coating material
binding and adhesion using chemical binders
laser beam irradiation of coating material
alloying of coating material with the substrate
Which one of the following is NOT an advantage of laser surface alloying?
increased wear resistance of substrate
improved microstructure of substrate
high quality alloyed layer
requires lesser heat input
Laser cladding is mainly used for ______
enhancing the strength of substrate
improving the aesthetic appearance of component
improving the abrasive and corrosive resistance of substrate
developing good microstructure of substrate
In laser based cladding, the dilution depth is ________
directly proportional to powder feed rate
inversely proportional to powder feed rate
inversely proportional to square of powder feed rate
directly proportional to square of powder feed rate
During laser based surface treatment, as the beam passes to another spot on the surface, the heated area is rapidly cooled by the surrounding metal. This phenomenon is called ___________.
Self-Quenching
Self-Etching
Self-Pitching
Self-Priming