Give the temperature range over which it is possible to austenitize each of the following Fe-C alloys during normalizing heat treatment (a) 0.15 wt% C (b) 0.50 wt% C (c) 1.10 wt% C
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- 5 Normalizing is softening process in which iron base alloys are heated ____ above the upper critical limit for both hypo and hyper eutectoid steels. a. 600 to 750°C b. 900 to 1000°C c. 800 to 900°C d. 40 to50°C2. Explain shortly what you know about the following terms as applied in heat treatment. a) Carburizingb) Nitriding.c) Cyaniding.d) Induction hardening.e) Flame hardeningCite the phases that are present and the phase compositions for the following alloys: 85 wt% Ag–15 wt% Cu at 800°C
- 12 – On modern large aeroplanes structure where can we find a more frequent use oftitanium alloys? And why is that?What type of grain structure in terms of chemical composition does non equlibrium cooling produces for isomorphous binary alloys?Which is/are used for annealing ferrous alloys? Check the right answersa) spheroidizing b) normalizing c) full annealing d) precipitation hardening e) none of the above
- 1. What temperature does a Fe-C metal with less than 4 weight percent C melt at? 2. What temperature does a Fe-C metal with less than two weight percent C melt at? 3. What climate causes delta-Fe to change into gamma-Fe? 4. What percentage of proeutectoid Fe 3C is present in a steel with 1.15 wt% carbon at 727.1 o C?List the phase(s) that are present, the phase composition(s) and the weight fractions of the phase(s) for each of the following alloys:(a) 70 wt% Zn-30 wt% Cu at 300 C (b) 90 wt% Pb-10 wt% Sn at 325 C (c) 2.5 kg Cu and 5.0 kg Ag at 900 C (d) 37 lbm Pb and 6.5 lbm Mg at 500 CThe microstructure of eutectic alloys is always heterogeneous.true or false.
- Cite the phases that are present and the phase compositions for the following alloys: 15 wt% Sn–85 wt% Pb at 100°C1- Describe, with using necessary diagrams, the structure of plain carbon steel (0.25% C). 2- explain the heat treatment and quenching process of plain carbon steel.Briefly describe the transformation of a hypereutectoid plain-carbon steel (0.4 percent C) with slow cooling.