Consider the Following Statements Regarding Defects in Forging (1) Flakes are internal breaks or ruptures occurring in some grades of alloy steel (2) Die shift is caused by a misalignment between the top and bottom forging dies (3) Fins and rags are small projections or loose metals driven into the surface of the forging
By Balaji
Updated on: March 21st, 2023
Which of the above statements is/are correct?
1. 1 and 2 only
2. 1 and 3 only
3. 2 and 3 only
4. 1, 2 and 3
All of the above-given statements are correct regarding defects in forging. Defects such as flakes die shifts, fins, and rags are produced in forging. Where flakes are internal ruptures, die shifts occur due to misalignment, and fins and rags are tiny metal projections.
Table of content
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1. Defects in Forging
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2. Consider the Following Statements Regarding Defects in Forgings
Defects in Forging
Defects in forging are nothing but imperfections that occur during the forging process. These defects may rise for various reasons, such as poor forging techniques, improper design, unfavorable environment, improper alignment, uneven or improper cooling, etc.
A few of the defects in forging are:
- Unfilled Section
- Incomplete Forging Penetration
- Cold Shut
- Flakes
- Improper Grain Growth
- Surface Cracking
- Scale Pits
- Die Shift
- Surface Cracking
- Residual Stresses
It is to be noted that not all imperfections are considered defects because they are less than the allowances. These defects can rise in Open and Closed Die forging processes.
Summary:
Consider the Following Statements Regarding Defects in Forgings
Flakes, die shifts, fins, and rags are the forging defects. The flakes are present in some grades of alloy steel, die shift is present in the top, and bottom forging dies, and Figs and rags are the metal projections that are driven into the surface of the forged metal. Various defects in forging occur while forming dies. Defects can result from improper forging or mistakes during the melting process, etc. Further, a mismatch can also occur in drop forging when dies are incorrectly aligned.
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