Steels with high carbon equivalent have poor Weldability, because in these steels during welding________________?

A. Carbon and other alloying elements get oxidised from the weld pool
B. Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C. Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D. Segregation of carbon and other element occurs in the weld pool leading to poor properties of
the weld

Related Mcqs:

Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
A. Small punches, broaches reamers and springs
B. Cutlery, screws, rivets and files
C. Mandrels, twist drills, small lathe tools and razors
D. Forgings like can shaft, structural steel plate, threading dies and drawing dies
Hydrogen in liquid steels is dissolved_________________?
A. As tiny gas bubbles
B. In the atomic form
C. In the ionic form
D. In the molecular form
Machinability of hard alloys and tool steels is improved by_____________________?
A. Spheroidising
B. Annealing
C. Tempering
D. Normalising
Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
A. Tempering
B. Hardening
C. Annealing
D. Normalising
Fine grained steels have____________________?
A. High brittleness
B. Higher tendency to distort
C. High ductility
D. None of these
Most important property of steels for use in automobile bodies is the___________________?
A. Formability
B. Yield strength
C. Toughness
D. Resilience
Earing is a defect found in steels after the following metal working operation ?
A. Extrusion
B. Rolling
C. Deep drawing
D. Wire drawing
Coarse grained steels have____________________?
A. Low toughness
B. No tendency to distort
C. High density
D. Very high toughness
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to____________________?
A. Time
B. Square root of time
C. Square of time
D. Cube of time
_______________ is the hardest oxide and is hence used where high wear resistance at high temperature is required?
A. Beryllium
B. Zirconia
C. Alumina
D. Magnesia