Cracks of a vertical nature and dark coloured fissures in a sample of hardened steel indicate that

Related MCQs

• In a specimen of hardened steel, hard and soft spots indicate
• If a medium carbon hardened steel shows pearlite structure it may be concluded that
• If the structure of a sample consists of pearlite, cementite and free carbon, the sample may be
• If a sample of steel shows unsymmetrical deformation of a piece in quenching, the probable cause could be
• If a sample of steel shown excessive hardness after tempering the probable cause could be
• A steel piece after hardening is heated to 300?C and then cooled in oil. The property imparted to the steel piece will be
• A steel specimen is heated to 730?C and cooled at the slowest possible rate in the furnace. Which property will be imparted to the steel piece?
• Quenching cracks during heat treatment can be minimised
• During heat treatment quenching cracks occur due to
• An operation on steel aimed at softening the steel to improve machinability is known as