DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Textbook Question
Chapter 36, Problem 2P
For each of the conditions in Problem l, could some form of post-weld processing be used to restore desirable properties? What type of postweld processing? What concerns might you have?
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8) The correct ways to control liquation
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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?
Ch. 36 - Oxyfuel-gas welding has a low rate of heat input....Ch. 36 - For what types of applications is ox\fuel-gas...Ch. 36 - What are some of the more attractive features of...Ch. 36 - How does pressure gas welding differ from the...Ch. 36 - In what way does the torch cutting of ferrous...Ch. 36 - Why might it be possible to use only an oxygen...Ch. 36 - How does an oxyacetylene cutting torch differ from...Ch. 36 - What are some of the ways in which cutting torches...Ch. 36 - When might stack cutting be an attractive process?Ch. 36 - What modification must be incorporated into a...Ch. 36 - If a curved plate is to be straightened by flame...Ch. 36 - Why does the flame-straightening process not work...Ch. 36 - What sorts of problems plagued early attempts to...Ch. 36 - What are the three basic types of current and...Ch. 36 - What is the attractive feature of variable...Ch. 36 - What is the difference between a consumable and...Ch. 36 - What are the three types of metal transfer that...Ch. 36 - What are some of the process variables that must...Ch. 36 - What are the four primary consumable-electrode...Ch. 36 - What are some general properties of the...Ch. 36 - What are some of the functions of the electrode...Ch. 36 - How are welding electrodes commonly classified,...Ch. 36 - Why are shielded metal arc electrodes often baked...Ch. 36 - What are the functions of the fluxing constituents...Ch. 36 - What benefit can be obtained by placing iron...Ch. 36 - Why are shielded metal arc electrodes generally...Ch. 36 - Why is the shielded metal arc welding process...Ch. 36 - What are some of the attractive features of the...Ch. 36 - What is the advantage of placing the flux in the...Ch. 36 - What feature enables the welding current in FCAW...Ch. 36 - What are some of the advantages of gas metal arc...Ch. 36 - Describe the relative performance of argon,...Ch. 36 - For what welding conditions would short circuit...Ch. 36 - What is the least desired mode of metal transfer?Ch. 36 - Which of the metal transfer mechanisms is most...Ch. 36 - Describe the metal transfer that occurs during...Ch. 36 - What are some of the benefits that can be obtained...Ch. 36 - What are some of the attractive features of gas...Ch. 36 - What are some of the primary process variables in...Ch. 36 - What is the attractive feature of advanced gas...Ch. 36 - What other gas metal arc welding modifications...Ch. 36 - What benefits can be gained by using a rectangular...Ch. 36 - What are some of the functions of the flux in...Ch. 36 - What are some of the attractive features of...Ch. 36 - What is the primary goal or objective in bulk...Ch. 36 - What is the current (or proper) designation for...Ch. 36 - What types of shielding gases are used in the gas...Ch. 36 - What are some of the features that must be...Ch. 36 - What can be done to increase the rate of filler...Ch. 36 - What are some of the attractive features of gas...Ch. 36 - For the GTAW process, what are the attractive...Ch. 36 - What are some of the advantages of employing a...Ch. 36 - How are the spot welds produced by gas tungsten...Ch. 36 - How is the heating of the workpiece during plasma...Ch. 36 - What are the two different gas flows in plasma arc...Ch. 36 - What are some of the attractive features of plasma...Ch. 36 - What is the keyhole effect in plasma arc welding?Ch. 36 - What is the primary difference between plasma arc...Ch. 36 - What is the primary objective of stud welding?Ch. 36 - What is the function of the ceramic ferrule placed...Ch. 36 - 71- Describe the sequence of activity in flash...Ch. 36 - How is percussion welding different from flash...Ch. 36 - Prob. 73RQCh. 36 - Describe the ideal thermal cut.Ch. 36 - What is the purpose of the oxygen in oxygen arc...Ch. 36 - Why is plasma arc cutting an attractive wav of...Ch. 36 - What techniques can be used to constrict the arc...Ch. 36 - Compared to oxyfuel cutting, what are some of the...Ch. 36 - How can a nontransferred arc plasma torch be used...Ch. 36 - What are some of the attractive features of...Ch. 36 - What are some of the benefits of performing plasma...Ch. 36 - Describe the relative size of the heat-affected...Ch. 36 - Why might the residual stresses induced during...Ch. 36 - Prob. 84RQCh. 36 - What are typical arc welding currents and...Ch. 36 - What are the attractive features or benefits of an...Ch. 36 - What are jigs, fixtures or positioners, and how...Ch. 36 - Describe thermal deburring.Ch. 36 - When welds fail, it is not uncommon for the...Ch. 36 - For each of the conditions in Problem l, could...Ch. 36 - Using the Internet or technical literature,...Ch. 36 - Using the Internet or technical literature,...Ch. 36 - Identify a new or recent EPA or OSHA regulation...Ch. 36 - Magnesium, while not as strong as steel or...Ch. 36 - Numerous joints appear in bicycle frames, some of...
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- Your boss requests a recommendation on which process to use to weld the high strength structural steel rail tank cars hull section. You have this additional information: P-GMAW Productivity is substantially lower. However, you have welders already qualified to do manual p-GMAW welding. Labor is 80% of total cost HYPERFILLⓇ® Productivity gains are important, and the volume of the product is sufficient on the rail tank cars to justify capital investment. With confidence, you respond: Use process because .(Give process and short explanation for why you want to use that process)arrow_forwardA GTAW operation is performed on low carbon steel, whose unit melting energy is 10.3 J/mm3. The welding voltage is 22 volts and the current is 135 amps. The heat transfer factor is 0.7 and the melting factor is 0.65. If filler metal wire of 3.5 mm diameter is added to the operation, the final weld bead is composed of 60% volume of filler and 40% volume base metal. If the travel speed in the operation is 5 mm/sec, determine (a) cross-sectional area of the weld bead, and (b) the feed rate (mm/sec) at which the filler wire must be supplied.arrow_forwardQUESTION 1 In an arc welding operation, a groove weld has a cross-sectional area=0.055 in² and is 24 in long. (Round your final answers to 1 decimal place) (a) What quantity of heat (in Btu) is required to accomplish the weld, if the metal to be welded is aluminum? Btu (b) How much heat must be generated at the welding source, if the heat transfer factor = 90% and the melting factor = 60%? H= Btuarrow_forward
- A welding operation is time-studied during which an operator was pace-rated as 120%. The operator took, on an average, 8 minutes for producing the weld-joint. If a total of 10% allowances are allowed for this operation. What is the expected standard production rate of the weld-joint in units per 8 hour day?arrow_forward??arrow_forwardWhat are some of the problems that oxygen can cause in welds?arrow_forward
- Please make the answer long. Thank you!arrow_forwardsome of the factors that influence the cost of making a weldmentarrow_forward7) Which type of FSW technique prevents plate thinning and hooking at advancing side of the weld joint during the welding process? O Hybrid FSW process O Stationary shoulder FSW process O Tandem Twin-stir FSW process Parallel Twin-stir FSWarrow_forward
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