11. An intermetallic compound of iron and carbon is called: a) cementite b) ferr

Question

11. An intermetallic compound of iron and carbon is called: a) cementite b) ferrite c) austenite d)pearlite 12. During slow cooling of a 1020 Steel from austenite: a) cementite forms first at the austenitic grain boundaries b) pearlite forms first at the austenitic grain boundaries c) ferrite forms first at the austenitic grain boundaries d) bainite forms first at the austenitic grain boundaries 13. During slow cooling of a 1095 Steel from austenite: a) cementite forms first at the austenitic grain boundaries b) pearlite forms first at the austenitic grain boundaries c) ferrite forms first at the austenitic grain boundaries d) martensite forms first at the austenitic grain boundaries 14. Austempering is used to produce which type of transformation product? a) pearlite b) bainite c) martensite d) retained austenite

Explanation / Answer

11. An intermetallic compound of iron and carbon is

ans: a.Cementite.

12. During slow cooling of a 1020 steel from austenite is

ans: c. Ferrite forms first at the austenitic grain boundaries.

13. During slow cooling of a 1095 steel from austenite is

ans: b.Pearlite forms first at the austenitic grain boundaries.

14. Austempering is used to produce which type of transfermation product.

ans: b.bainite

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