Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 4, Problem 35RQ
To determine
Hypoeutectoid and hyper eutectoid steels and the final structure formed by them upon the cooling process.
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What is the annealing process to obtain a ferritic-spherical carbide (cementite) internal structure in super-eutectoid steels? how and why is it applied?
If a eutectoid steel sample is heated to 800°C and then quenched in a cold-water bath then
what would be the possible microstructure? Draw the microstructure and label it.
(c) The steels with the following compositions are heat treated and the results of
microstructures are indicated in Table 2(c).
Table 2(c): Heat treated steels and the results of microstructures
Steel A
0.35 wt% C
Coarse Pearlite
Steel B
0.25 wt% C
Coarse Pearlite
Steel C
0.35 wt% C
Fine Pearlite
Rank the above steels based on carbon content and microstructures from the highest
to the lowest hardness with justification.
Chapter 4 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 4 - What kind of questions can be answered by...Ch. 4 - Prob. 2RQCh. 4 - Supplement the examples provided in the text with...Ch. 4 - Prob. 4RQCh. 4 - What three primary variables are generally...Ch. 4 - Use the pressure–temperature diagram for water...Ch. 4 - Prob. 7RQCh. 4 - What form of equilibrium phase diagram is most...Ch. 4 - What is a cooling curve?Ch. 4 - Prob. 10RQ
Ch. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - What types of changes occur upon cooling through a...Ch. 4 - Prob. 15RQCh. 4 - What is a tie�line? For what types of phase...Ch. 4 - What points on a tie�line are used to determine...Ch. 4 - Prob. 18RQCh. 4 - What is a cored structure? Under what conditions...Ch. 4 - What is the difference between a cored structure...Ch. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - For the various three�phase reactions, what does...Ch. 4 - Prob. 26RQCh. 4 - Prob. 27RQCh. 4 - Prob. 28RQCh. 4 - Prob. 29RQCh. 4 - Prob. 30RQCh. 4 - Prob. 31RQCh. 4 - Prob. 32RQCh. 4 - Prob. 33RQCh. 4 - Prob. 34RQCh. 4 - Prob. 35RQCh. 4 - Prob. 36RQCh. 4 - Prob. 37RQCh. 4 - What is carbon equivalent, and how is it computed?Ch. 4 - Prob. 39RQCh. 4 - Prob. 40RQCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Consider the manufacture of a fishhook beginning...Ch. 4 - If a stainless steel were to be used, what type of...Ch. 4 - A wide spectrum of coatings and surface treatments...Ch. 4 - Prob. 1.4CSCh. 4 - Prob. 2.1CSCh. 4 - Prob. 2.2CSCh. 4 - Prob. 2.3CSCh. 4 - Prob. 2.4CS
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Use the TTT diagram for O1 Tool steel provided above to estimate the amounts ofpearlite and martensite formed in the quenched heat-treated samples.arrow_forwardWhat is the microstructure that will be formed after heat treatment of steel containing 1.4 carbon ratio with normalization and air cooling? support with phase diagram and TTT diagrams.arrow_forwardA steel contains 18% pearlite and 82%primary ferrite at room temperature. Esti-mate the carbon content of the steel. Is thesteel hypoeutectoid or hypereutectoid?arrow_forward
- Using the TTT diagram for eutectoid steel, draw the specified cooling path on the diagram. Indicate what phases you expect in the final product with percentage of each phase. Assume the material has been fully austenitized before cooling. a. Water cool to room temperature b. Hot quench in molten salt to 690°C and then cooled isothermally for 2 hours: c. Hot quench to 610°C hold 3 minutes and water quencharrow_forwardWhat does the process of temper drying do for hardened carbon steel?arrow_forwardTo what temperature should hypoeutectoid plain carbon steel be heated for hardening purposes according to the iron carbon diagram?arrow_forward
- A 0.25% C hypoeutectoid plain-carbon steel is slowly cooled from 950°C to a temperature just slightly below 723°C.(a) Calculate the weight percent proeutectoid ferrite in the steel.(b) Calculate the weight percent eutectoid ferrite and weight percent eutectoid cementite in the steel.arrow_forwardWhat is the marcosopic structure of metallic in low carbon and then high carbon steels .arrow_forwardWith respect to the S-N diagram shown below, answer the following questions:(a) for Gray cast iron, what is the projected number of cycles to failure for an induced stress of 20,000 psi?(b) What is the endurance limit and associated stress for a 0.47% heat treated carbon steel? (c) What is the endurance limit for the Aluminum-copper alloy?(d) What is the endurance strength for heat treated Alloy Steel at 400,000 cycles?arrow_forward
- Problem 1 A 0.65 percent C hypoeutectoid plain-carbon steel is slowly cooled from about 950°C to a temperature just slightly above 723°C. Calculate the weight percent austenite and weight percent proeutectoid ferrite in this steel. a +y a a 0.02% C 0.65% C 0.80% Carrow_forwardThis equilibrium phase of steel only occurs at temperatures above 723° C: martensite ferrite austenite O cementitearrow_forwardA steel contains 18% pearlite and 82% primary ferrite at room temperature. Estimate the carbon content of the steel. Is the steel hypoeutectoid or hypereutectoid?arrow_forward
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