Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 26, Problem 29R
Why is brine quenching faster than water quenching?
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1.Mention four quenchants and describe how each of them affect the strength of the material being quenched arranging them in a decending ordrer.
2. Draw a typical time temperature transformation diagram showing how a material is cooled under critical cooiling rate.
3. explain non equilibrium cooling
Discuss the various stages in Quenching process with neat sketches.
What is quenching ? Why should quenched still be tempered ? Discuss .
Chapter 26 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 26 - What gives metals their desirable properties?Ch. 26 - What is heat?Ch. 26 - What are the basic units of measure for heat?Ch. 26 - What is sensible heat?Ch. 26 - Prob. 5RCh. 26 - What does the color of light given off from a hot...Ch. 26 - Prob. 7RCh. 26 - In steel-making, what is ore combined with in the...Ch. 26 - Prob. 9RCh. 26 - What is an alloy?
Ch. 26 - Using Figure 26-18, answer the following...Ch. 26 - What is a eutectic composition?Ch. 26 - Using Table 26-3, what are the lowest and highest...Ch. 26 - Approximately how many degrees wide is the...Ch. 26 - Referring to Figure 26-20, what color would...Ch. 26 - Referring to Figure 26-20, what is the approximate...Ch. 26 - Prob. 17RCh. 26 - Referring to Figure 26-20, above what temperature...Ch. 26 - Prob. 19RCh. 26 - What is known as the critical temperature of...Ch. 26 - Can a metal have all the mechanical properties at...Ch. 26 - What other properties can a metal's hardness...Ch. 26 - Which property, brittleness or ductility, will let...Ch. 26 - What is toughness?Ch. 26 - What are the common types of strength...Ch. 26 - Prob. 26RCh. 26 - What are the three steps in precipitation...Ch. 26 - How do ferrite and cementite work together to form...Ch. 26 - Why is brine quenching faster than water...Ch. 26 - What can be done to speed up the quenching rate in...Ch. 26 - Why is the formation of martensite a problem when...Ch. 26 - How can the effects of cold working be removed?Ch. 26 - Prob. 33RCh. 26 - Referring to Figure 26-20, what would the preheat...Ch. 26 - Why must the stress-relieving temperature be kept...Ch. 26 - What properties can annealing produce in metals?Ch. 26 - How long does it take the weld metal to go through...Ch. 26 - What are some sources of hydrogen that can...Ch. 26 - How can nitrogen get into an SMA weld?Ch. 26 - What are some of the problems that oxygen can...Ch. 26 - When do cold cracks develop?Ch. 26 - What is carbide precipitation?
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- What can be done to speed up the quenching rate in any liquid?arrow_forward36 Asiacell O Homework 4 -... -> 3 Class Materials Eng. Dep. Heat Treatment Ismail Ibrahim Marhoon Homework 4 Q1: 1.5 in diameter steel part is quenched in oil with no agitation. (H=0.20). If we use a 4340; 4140; 8640; 5140; 1040 steel, what would be the hardness number at the center of the part? Q2: Determine the best quenching medium to produce a minimum hardness of HRC 40 at the center of a 3.75 cm diameter 4320 steel bar. Given Cingrate t 00c00 143 to 4340 50 40 8640 ab 9310 30 4320 1050 1040 10 20 it 1 1 2n 10 20 30 Jominy distance th of an inch) Die he eted e TABLE The N canticient, or seveity of the querch, far several guenehing sedla H Coefticient Coaling Rate at he Center of a l-in. Bar (CA) Medium Ol no taton) 04 anitation) 025 18 45 HyD inc agtation H0 fegiutont Brine Ino agtaton) Brine lapttiori 10 4.0 190 20 60 90 230 Ad DISTANCE FROM OUENCHED END IN) DIAMETER IN)arrow_forwardCan someone please help me to answer all of the following questions. PLEASE AND THANK YOU!!!!arrow_forward
- The purpose of heat treatment procedure for quenching is a. to decrease hardness b. to increase impact energy O c. to get finer grain size structure O d. to increase hardness O e. to improve ductilityarrow_forwardnormalizing advantages over quenching (heat treatment process)arrow_forward2. At (950 °C), (0.8 %) carbon steel is getting decarburized for a duration of (4 hr) in an atmosphere equivalent to (0 %) carbon at the surface of the steel. Determine the minimum depth up to which post machining is to be done? if the carbon content at the surface after machining should not to be below (0.6 %). (Do= 0.7 * 104 m?/sec), (Qa= 157 kJ/mol). 1 erf (z) erf (z) 0.00 0.0000 0.70 0.6778 0.01 0.0113 0.75 0.7112 0.02 0.0226 O.80 0.7421 0.03 0.0338 0.85 0.7707 0.04 0.0451 0.90 0.7969 0.05 0.0564 0.95 0.8209 0.10 0.1125 1.00 0.8427 0.15 0.20 0.1680 1.10 0.8802 0.2227 1.20 0.9103 0.25 0.2763 1.30 0.9340 0.30 0.3286 1.40 0.9523 0.35 0.3794 1.50 0.9661 0.40 0.4284 1.60 0.9763 0.45 0.4755 1.70 0.9838 0.50 0.55 0.5205 1.80 0.9891 0.5633 0.6039 1.90 0.9928 0.60 2.00 0.9953 0.65 0.6420arrow_forward
- Carburizing is the process where: -manganese contributes to the strengthening of the material -the part is quenched in a bath of oil to decrease distorion -carbon is added to the outer layer of a steel part through absorbtion and diffusion. -a part is packed in a salt bath to increase durabilityarrow_forward3) The dihedral wetting angle between solid- liquid interface with lowest solidification cracking tendency under identical welding conditions is 0° O45° 60° 90°arrow_forwardA-What is the purpose of the following heat treatments?(mention two points only for each heat treatment). 1-tempering.2-Annealing. 3-surface hardening.arrow_forward
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