Welder Red Seal · Question
In metallurgy, what is the 'heat-affected zone' (HAZ)?
The HAZ is the portion of the base metal that has not been melted during welding but has undergone microstructural and property changes due to the heat of the w
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Question: In metallurgy, what is the 'heat-affected zone' (HAZ)?
Answer options: ✅ The area of the base metal whose microstructure has been altered by the heat of welding but not melted
- The area of the weld metal that has completely melted and solidified
- The area of the base metal that has been mechanically deformed during fabrication
- The area of the weld that has been chemically treated after welding
Correct answer: The area of the base metal whose microstructure has been altered by the heat of welding but not melted
Explanation: The HAZ is the portion of the base metal that has not been melted during welding but has undergone microstructural and property changes due to the heat of the welding process. These changes can affect mechanical properties like hardness and toughness.
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- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
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