The process in which steel is heated 20? to 40?C below the lower critical temperature, held there for a prolonged period and then allowed to cool slowly in the furnace is known as

Related MCQs

• The process of reheating hardened steel to temperature below the lower critical temperature followed by any desired rate of cooling, is known as
• In a 0.2% carbon steel which has been heated above the third critical temperature on cooling at the first critical point the austenite remaining in solution is transformed to new structure called
• If steel is slowly cooled in furnace, the structure obtained is
• When piece of 0.2% carbon steel is heated above third critical point the steel is a solid solution of carbon in gamma iron and called
• The process of reheating the hardened steel to some temperature below the critical range, followed by any rate of cooling is known as
• The process of heating iron base alloys to approzimately 40?C above the critical temperature range followed by cooling to below that range in still air at ordinary temperature is known as
• The solid solution carbon in alpha iron obtained on cooling of 0.2% carbon steel which have been heated above the third critical point is called
• A composite bar of steel and copper is heated. The copper bar will be under
• In normalising steel is heated 40-50 C
• Steel cannot be hardened unless it is heated