2) Given the time-temperature transformation diagram and the accompanying hand-

Question

2) Given the time-temperature transformation diagram and the accompanying hand-

drawn partial phase diagram on the same page, what would be the phases present for a

4340 steel? Carefully read the handwritten notes on page 5. Use p. 7 to show any work,

including any phase diagram-related calculations of the amount of proeutectoid

product for cases when there is a proeutectoid product.

A) quenched in cold water to 650 oC in 0.5 second, then held at 650 oC for 10000 seconds, then

quenched to room temperature

B) cooled in air at 0.001oC/sec to 600oC, then quenched to room temperature

C) quenched in cold water directly to room temperature in 1 second, then heated to 425oC and

held there for 1000 seconds, and finally quenched to room temperature

D) quenched in cold water to 350oC in 0.5 second, then held at 350oC for 100 seconds, then

quenched to room temperature

E) quenched in cold water to 350oC in 0.5 second, then held at 350oC for 10000 seconds, then

quenched to room temperature

F) quenched in cold water to 650oC in 0.5 second, then held at 650oC for 1000 seconds, then

quenched to room temperature

G) quenched in cold water directly to room temperature in 1 second

Given the time-temperature transformation diagram and the accompanying hand drawn partial phase diagram on the same page, what would be the phases present for a 4340 steel? Carefully read the handwritten notes on page 5. Use p. 7 to show any work, including any phase diagram-related calculations of the amount of proeutectoid product for cases when there is a proeutectoid product. quenched in cold water to 650 oC in 0.5 second, then held at 650 oC for 10000 seconds, then quenched to room temperature cooled in air at 0.001oC/sec to 600oC, then quenched to room temperature quenched in cold water directly to room temperature in 1 second, then heated to 425oC and held there for 1000 seconds, and finally quenched to room temperature quenched in cold water to 350oC in 0.5 second, then held at 350oC for 100 seconds, then quenched to room temperature quenched in cold water to 350oC in 0.5 second, then held at 350oC for 10000 seconds, then quenched to room temperature quenched in cold water to 650oC in 0.5 second, then held at 650oC for 1000 seconds, then quenched to room temperature quenched in cold water directly to room temperature in 1 second

Explanation / Answer

E) quenched in cold water to 350oC in 0.5 second, then held at 350oC for 10000 seconds, then

quenched to room temperature

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.