Mechanical Engineering :: Engineering Materials
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In the lower part of the blast furnace (zone of fusion), the temperature is
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Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
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Which of the following statement is wrong?
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Inconel contains
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In a hardening process, the hypo-eutectoid steel is
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The ratio of the volume occupied by the atoms to the total volume of the unit cell is called
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Which of the following statement is incorrect about duralumin?
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The property of a material which enables it to retain the deformation permanently, is called
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Sulphur in cast iron
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Cementite consist of
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A.
heated from 30° C to 50° C above the upper critical temperature and then cooled in still air
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B.
heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
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C.
heated from 30° C to 50° C above the upper critical temperature and then cooled slowly in the furnace
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D.
heated below or close to the lower critical temperature and then cooled slowly
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