DeGarmo's Materials and Processes in Manufacturing

12th Edition

ISBN: 9781118987674

Author: J. T. Black, Ronald A. Kohser

Publisher: WILEY

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Joining Processes

It is the process of permanent or temporary joining of two metal pieces with the help of heat or pressure. Two metal parts are assembled by applying an energy source for the formation of a single unit. The obtained joined metals cannot be fragmented easi…

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Textbook Question

Chapter 36, Problem 36RQ

Why are shielded metal arc electrodes generally limited in length, forcing the process to be one of intermittent operation?

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Chapter 36, Problem 35RQ

Chapter 36, Problem 37RQ

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It is desired to determine the cost of the submerged arc welding operation in the preceding problem, including electric power cost but excluding work material costs. Power during arc-on time = 9,000 W, and cost of electricity = $0.15/kWH. The labor cost rate = $33.00/hr and the SAW equipment cost = $20.00/hr (including applicable overheads). The cost of each spool of electrode wire = $50.00. The cost of granular flux used in each cycle = $2.00. What is the welding cost of each completed tube?

1)a) Why is automation of the covered electrode arc source difficult?b) what properties is a metal with good resistance welding ability expected to have?c) Why is the heat transfer factor higher in arc welding processes with the consumed electrode than the methods used with the non-consumed electrode?d) Why is it important to weld thin and long instead of thick and short?e) why is it important that the source root is designed to be forced to press, not pull? 2) there is a characteristic liquid penetration error on a large piece of steel poured in the sand mold. The surface of the piece consists of a mixture of sand and metal.a) Explain at least 3 of the steps that can be taken to correct this error.b) what other types of casting errors may possibly occur in each of these steps? Explain 3) grain structure formed in part after casting;a) Describe by drawing a figure.b) what problems can this grain structure pose? Please explain. How can these problems be cured?4) explain two of the…

Chapter 36 Solutions

DeGarmo's Materials and Processes in Manufacturing

Ch. 36 - What is the principal fuel gas used in oxyfuel-gas...Ch. 36 - Why does an oxyfuel-gas welding torch usually have...Ch. 36 - What is the location of the maximum temperature in...Ch. 36 - What function or functions are performed by the...Ch. 36 - What three types of flames can be produced by...Ch. 36 - Which type of oxyfuel flame is most commonly used?Ch. 36 - What are some of the alternative fuels (other than...Ch. 36 - Why might a welder want to change the tip size (or...Ch. 36 - What is filler metal, and why might it be needed...Ch. 36 - What is the role of a welding flux?

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