cameroon gce intermediate level material science and processes 3

cameroon gce intermediate level material science and processes 3

cameroon gce intermediate level material science and processes 3

WORK TO BE DONE

PHASE 1 – PREPARATION:
Procedure(s):
(5 marks)

a) Punch or file or cut to 5 mm depth or bench or grind, rough workpiece
b) Report writing on one of the above operations.

PHASE 2 – HEATING AND SHAPING OF METAL:
Procedure(s):
(16 marks)

a) Heat the rough piece to forging temperature (reddish colour);
b) Control temperature;
c) Hammer the heated edge to the required shape as indicated in figure;
d) Control of dimensions obtained.

PHASE 3 – HEAT TREATMENT OF METAL
Procedure(s):
(14 marks)

a) Heating the whole finished workpiece to hardening temperature,
b) Quenching in cooling medium,
c) Reheating to whole workpiece to tempering temperature,
d) Cooling
e) Testing of hardness: (Punching or filing or grinding or bending or cutting).
f) Control of dimensions.

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