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

Related MCQs

• 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 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
• 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
• Any process of heating and cooling steel that produces a rounded or globular from of carbide is known as
• 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
• The consitituent which has a powerful softening effect on cast iron and its presence in cast iron reduces the ability of the iron to retain carbon in chemical combination, 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
• Delta iron occurs at temperature in the range of
• If steel is cooled in still air, the structure obtained is