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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Textbook Question
Chapter 1, Problem 29RQ
What kind of process is powder metallurgy: casting or forming?
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1) Give some examples of design of powder metallurgical parts
1. Die casting is the process where molten metal is force into the die cavity at high pressures. There are two types of die casting; hot camber process and cold chamber process. Please describe and draw the schematic illustration to represent each of them.
2.
a) Flat rolling reduces the thickness of plates and sheets. It is possible, instead, to reduce their thickness simply by stretching the material? Would this be a feasible process? Explain.
b) Defects may be present on the surfaces of rolled plates and sheets, or there may be internal structural defects. Defects are undesirable not only because they adversely affect surface appearance, but also because they may affect strength, formability, and other manufacturing characteristics of the rolled sheets. Describes the typical defects in flat rolling by providing the schematic illustration for each of them.
Which of the following do not pertains to the advantage of using powder
metallurgy over casting in fabricating metal products?
Allows fabrication for alloys having high melting temperatures.
Heat treatment after compaction is unnecessary.
Better dimensional tolerances result
Porosity may be introduced, the degree of which may be controlled
Chapter 1 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 1 - What role does manufacturing play relative to the...Ch. 1 - Arent all goods really consumer goods, depending...Ch. 1 - The Subway sandwich shop is an example of a job...Ch. 1 - How does a system differ from a process? From a...Ch. 1 - Is a cutting tool the same thing as a machine...Ch. 1 - What are the major classifications of basic...Ch. 1 - Casting is often used to produce a...Ch. 1 - In the lost�wax casting process, what happens to...Ch. 1 - In making a gold medal, what do we mean by a...Ch. 1 - How is a railroad station like a station on an...
Ch. 1 - Because no work is being done on a part when it is...Ch. 1 - What forming processes are used to make a paper...Ch. 1 - What is tooling in a manufacturing system?Ch. 1 - It is acknowledged that chipâ€�type machining is...Ch. 1 - Compare Figures 1.1 and 1.16. What are the...Ch. 1 - In a modern safety razor with three or four blades...Ch. 1 - List three purposes of packaging operations.Ch. 1 - Assembly is defined as the putting together of...Ch. 1 - What are the physical elements in a manufacturing...Ch. 1 - In the production system, who usually figures out...Ch. 1 - In Figure 1.8, what do the lines connecting the...Ch. 1 - Characterize the process of squeezing toothpaste...Ch. 1 - It has been said that low-cost products are more...Ch. 1 - Prob. 24RQCh. 1 - If the rolls for the cold-rolling mill that...Ch. 1 - Make a list of service systems, giving an example...Ch. 1 - What is the fundamental difference between a...Ch. 1 - Prob. 28RQCh. 1 - What kind of process is powder metallurgy: casting...Ch. 1 - In view of Figure 1.2, who really determines the...Ch. 1 - What costs make up manufacturing cost (sometimes...Ch. 1 - What are major phases of a product life cycle?Ch. 1 - How many different manufacturing systems might be...Ch. 1 - In general, as the annual volume for a product...Ch. 1 - The Toyota truck plant in Indiana produces 150,000...Ch. 1 - A company is considering making automobile bumpers...Ch. 1 - Many companies are critically examining the...Ch. 1 - We can analogize your university to a...Ch. 1 - What kind of manufacturing system (design) is your...Ch. 1 - What are the major process steps in the assembly...Ch. 1 - What is the relationship between Figures 1.2Â...Ch. 1 - Recently, National Geographic magazine asked the...
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- 17 I. Atomization II. Electrolytic II. Skew rolling IV. Chemical Principal method(s) by which metallic powders are commercially produced: a) I and II b) I, II, and IV C) I, II, III and IV I and II e) Only I f) L, Il and IIIarrow_forwardQUESTION 1 (a) Powder Metallurgy (PM) enables the processing of materials with very high melting points, including refractory metals such as tungsten, molybdenum and tantalum. Such metals are very difficult to produce by melting and casting and are often very brittle in the cast state. As a manufacturing engineer, state and explain at least SIX (6) limitations of powder metallurgy that is not applicable in particular engineering industries. In a case where you were assigned to use powder metallurgy in metal forming, justify at least THREE (3) PM requirements. (b) A coil of sheet metal is placed in a furnace and annealed in order to improve its ductility. Nonetheless, it is found that the sheet metal has a lower limiting drawing (LDR) than it had before the annealing process. Describe the meaning of LDR and explain the reasons for this behaviour by referring to the microstructure and materials' properties point of view for different types of materials. In addition, discuss the process…arrow_forward1) What are the advantages of powder metallurgy? i. Extreme purity product ii. Low labour cost iii. Low equipment cost i, ii & ii i & ii only ii & iii only i & iii onlyarrow_forward
- 14) What is the biggest advantage of powder production with self-impact friction wear? A) Preventing contamination B) Being inexpensive C) Producing very little energy D) Noarrow_forward(c) Discuss FOUR (4) purposes of blending process in powder metallurgy.arrow_forwardEvaluate the different manufacturing processes used to produce a component and recommend the most suitable process based on cost, quality and time constraints.arrow_forward
- Plasticsarrow_forwardWhich forming process would you use to make the following composite parts? (Explain) A. A 12" diameter pipe with a 1/4" wall thickness to be used in a chemical plant. B. A roof panel for a road grader. Production is one grader per day. C. Tool chests for contractors. The company produces five units a day. D. Overhead storage bin doors for a passenger jet. A hundred parts are needed for each plane, and production is four planes per month.arrow_forwardFor both processes below explain what the process is, how it affects the structure , properties and behaviour of the parent material. A) powder processing of metals B) extrusion of polymersarrow_forward
- There are several ways of shaping plate or sheet glass. Name and briefly describe one of them.arrow_forward(b) An engineer is assigned a task to select a possible product to be manufactured in their company with high productivity. Currently, powder pressing is the only processing technique available in the company. i. Choose the most suitable product to be suggested to the company from Figure 7. ii. Justify the answer in (i).arrow_forward1) How does the ease of tool locating and clamping affects the design efficiency? Give some examples of design of powder metallurgical partsarrow_forward
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