EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 17, Problem 5RQ
What is isostatic pressing? How is it different from pseudo-isostatic pressing?
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Q. Discuss the following sentences:
1- A wide particle size distribution is preferred for dry pressing.
2- Products with high dimension accuracy are obtained in hot pressed technique.
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GKN Sinter Metals Company pressed iron powders using a compaction pressure of 600 MPa to produced a cylindrical bearing which is 70 cm long and has internal and external diameters of 8 cm and 16 cm, respectively. Determine (a) the most appropriate pressing direction, (b) the required press tonnage to perform this operation, and (c) the final weight of the part if the porosity is 12%, given that the density of iron, ρ = 7.87 g/cm3. Assume shrinkage during sintering can be neglected
Chapter 17 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 17 - Describe briefly the production steps involved in...Ch. 17 - Name the various methods of powder production and...Ch. 17 - Explain why metal powders may be blended.Ch. 17 - Describe the methods used in metal powder...Ch. 17 - What is isostatic pressing? How is it different...Ch. 17 - What hazards are involved in PM processing?...Ch. 17 - Describe what occurs to metal powders during...Ch. 17 - Prob. 8RQCh. 17 - Why might secondary and finishing operations be...Ch. 17 - Prob. 10RQ
Ch. 17 - Prob. 11RQCh. 17 - Prob. 12RQCh. 17 - Prob. 13RQCh. 17 - What is screening of metal powders? Why is it...Ch. 17 - Why are protective atmospheres necessary in...Ch. 17 - Why is there density variation in the compacting...Ch. 17 - What is the magnitude of the stresses and forces...Ch. 17 - List the similarities and differences of forging...Ch. 17 - Give some reasons that powder-injection molding is...Ch. 17 - How does the equipment used for powder compaction...Ch. 17 - Explain why the mechanical and physical properties...Ch. 17 - What are the effects of the different shapes and...Ch. 17 - Describe the relative advantages and limitations...Ch. 17 - How different, if any, are the requirements for...Ch. 17 - The powder metallurgy process can be competitive...Ch. 17 - What are the reasons for the shapes of the shown...Ch. 17 - Should green compacts be brought up to the...Ch. 17 - Because they undergo special processing, metal...Ch. 17 - In Fig. 17.12, it can be seen that the pressure is...Ch. 17 - Why do the compacting pressure and the sintering...Ch. 17 - What will be stronger: a blend of stainless steel...Ch. 17 - Name the various methods of powder production and...Ch. 17 - Estimate the maximum tonnage required to compact a...Ch. 17 - Refer to Fig. 17.11a. What should be the volume of...Ch. 17 - Determine the shape factors for (a) a cylinder...Ch. 17 - Estimate the number of particles in a 500-g sample...Ch. 17 - Prob. 37QTPCh. 17 - A coarse copper powder is compacted in a...Ch. 17 - A gear is to be manufactured from iron powders. It...Ch. 17 - What volume of powder is needed to make the gear...Ch. 17 - The axisymmetric part shown in Fig. P17.41 is to...Ch. 17 - Prepare an illustration similar to Fig. 13.1,...Ch. 17 - Prob. 44SDPCh. 17 - Compare the design considerations for PM products...Ch. 17 - Prob. 46SDPCh. 17 - Prob. 47SDPCh. 17 - Using the Internet, locate suppliers of metal...Ch. 17 - Explain why powder metal parts are commonly used...Ch. 17 - Prob. 50SDPCh. 17 - Describe how the information given in Fig. 17.15...Ch. 17 - It was stated that, in the process shown in Fig....Ch. 17 - Prob. 53SDPCh. 17 - The axisymmetric parts shown in Fig. P17.54 are to...Ch. 17 - Assume you are working in technical sales. What...
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- Ceramics are much stronger in compression rather than indentation explain why?arrow_forwardFor simplified processing calculations, glass-bottle shaping temperature can be taken as the softening point (at which n = 107.6 P ), and the subsequent annealing temperature can be taken as the annealing point (at which n = 1013.4 P ). If the glass-bottle processing sequence involves a shaping temperature of 690 °C for a glass with an activation energy for viscous deformation of 440 kJ/mol , calculate the appropriate annealing temperature. Express your answer to three significant digits.arrow_forwardPlease provide Handwritten answerarrow_forward
- Which of the following processes are the plastic forming methods used in the shaping of traditional ceramics (three correct answers): Odry pressing O extrusion O jangling O jiggering O jolleying Oslip casting O spinningarrow_forwardIf your aim is to obtain enhanced densification rates and accelerated grain growth during sintering, which sintering method would you prefer and why?What are the stages of this sintering method?arrow_forwardGranule strength is very important in pressing powders. The force applied to a granule with a radius of 1 mm is 0.5 Newton. Calculate the breaking strength of the granule. b) It is observed that the pressed granules break easily during pressing. Write down the reasons of this situation and what would you take precations to solve this problem? Why? (please write down 3 precautions with reasons). odluckarrow_forward
- A thin steel disk of an oil separator of 100mm outside diameter is shrunk onto a solid steel shaft of 20mm diameter. The system is to be designed to make sure the disc does not become loose at speeds lower than 100000rev/min. Determine the shrinkage allowance required in order to avoid separation disc and shaft, at a speed of 100000rev/min. For the material assume a Young's Modulus, Poisson Ratio and density of 210GPa, 0.3 and 7850kg/m³ respectively.arrow_forward3arrow_forwardHot isostatic pressing can be done without a can to get rid of porosity, but what needs to be done before the hot isostatic pressing to make the can unnecessary?arrow_forward
- 12) Assuming injection molding pressures of 10kpsi, estimate the die clamping force required for injection molding 10 identical 1.5-in.-diameter disks in one die. Assume runner area is 5.0 in?. Discuss the affects of reorienting the disks.arrow_forwardWhat is Blow molding process? Describe extrusion blow molding and injection blow molding. What are the advantages of multilayer blow molding?arrow_forwardIn 2018, 25% of produced flat glass were recycled back as a raw material in the production of flat glass as it yielded sustainable impacts such as the reduction of energy requirement to heat up the furnace since the mixture will melt easily. In your opinion, can other types of glass wastes (eg. tempered glass, glass bottles, etc) be used as a raw material in the production of flat glass. Justify your answer by providing references.arrow_forward
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