Answered: Temperature distribution curve…

Temperature distribution curve Heat-affected zone (HAZ) Base metal Area 1 (500-800°C) R 1500 1000 500 e. Area 2 Maximum temperature (°C) at each location of the weld Weld metal (1000°C or higher)

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter26: Welding Metallurgy

Section: Chapter Questions

Problem 35R: Why must the stress-relieving temperature be kept be-low the critical temperature of the plate?

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Question

In welding of metals, molten metal is deposited between the two objects that are to be welded together. Most of the heat from the molten material is conducted into the area around the weld, significantly increasing the temperature in the area, which can affect the local material properties. This area is often called the Heat Affected Zone (HAZ).

Assuming you have base metal that is hypereutectoid steel, with a Cementite+Fine Pearlite microstructure, estimate what the microstructure would be in Area 1 and Area 2 of the HAZ. What is the primary factor (other than temperature and composition) that would affect what type of microstructure would be created?

Temperature
distribution curve
Heat-affected zone (HAZ)
Base metal
Area 1
(500-800°C)
R
1500
1000
500
e.
Area 2
Maximum temperature (°C)
at each location of the weld
Weld metal
(1000°C or higher)

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