a) Explain why the processing speed must be slow when rolling steel and why the hot rolling is needed when the strain is large.
a) Explain why the processing speed must be slow when rolling steel and why the hot...
a. What may happen when a large section of steel is heated at a rapid rate? Why? b. Why are cold forming processes always ac- companied by work-hardening, whereas hot forming processes are not? C. Why are lubricants used in metal forming processes? List some useful effects. d. List some considerations that must be taken into account when designing a section for ex- trusion. e. For heavier sections, would you recommend larger angles of contact in rolling? Why? f. What...
Hot rolling produces the desired thickness of low carbon steel. How are granular structure, strength and ductility affected?
Explain analytically why the neutral point willshift toward the entry point in hot rolling for (a) increasedfriction coefficient values, and (b) increasedreduction in workpiece thicknesses.
During the manufacturing of commercial windows, hot steel ingots are passed though a rolling process and flattened to a prescribed thickness. When the manufacturing process is working properly the ingots should have a mean thickness of 0.75 inches. A random sample of 40 ingots is taken and the mean was found to be 0.725 inches with a standard deviation of 0.092. a. Find a 95% confidence interval for the population mean thickness. b. Find the error bound. c. Interpret the...
reasons. a) Why might HSLA steel makers am to have dynamic recrystallisation dung the high temperature rolling period and then to avoid static recrystallisation during the hold period? (1 mark) (1) Why are interstitial free steek relatively sof? (1 mark) b) Why might the folowing products have higher cold fomability than Dual Phase HSLA steek? Give your TRIP assisted steel (1 mark) Ferrite Pearlite HSLA steek. (1 mark) c) What is meant by the Dead Metal Zone in a flow...
explain in details the difference between hot rolled steel, cold rolled steel, and aluminum. thanks in advance
Why the magnet slow down when we thrown it inside hollow cylindrical copper? Explain and sketch
Question 3 1 pts Explain the following sentence: The ram speed is high when steel is extruded, whereas it is lower when alunimum is extruded.
Select the statements that explain why very small and very large populations experience slow population growth under the logistic growth model. 1- Small populations have fewer individuals capable of producing offspring. 2- Limited resources are shared among many individuals in very large populations. 3- The intrinsic growth rate is higher when populations contain many individuals. 4- The carrying capacity is larger for populations that contain very few individuals.
15. How is the relationship between fuel cost, speed and power installed determined? Why slow steaming was considered necessary and how is it used for economic performance of a ship? 15. How is the relationship between fuel cost, speed and power installed determined? Why slow steaming was considered necessary and how is it used for economic performance of a ship?