A small piece of Type 1090 carbon steel is heated to 900 C for 1 hr. IV piece is

Question

A small piece of Type 1090 carbon steel is heated to 900 C for 1 hr. IV piece is then subjected to one of the following treatments: A: Suddenly cooled to room temperature B: Slowly cooled to room temperature C: Slowly cooled to 750 C, allowed to remain that way for 1 hr, and then suddenly cooled to room temperature. For each case, find what fraction of the mass of the piece will be in the form of ferrite, cementite, pearlite and Martensite. Give results as for example "0.17", not "0.1734522", not 1.7E-1. Fill in all the spaces; if fraction is zero, enter 0.

Explanation / Answer

case ferrite cementite pearlite martensite

1 13.78 76.22 0 10   

2 5.42 12.97 30.88 50.73   

3 0.92 2.08 0 97

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