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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
2
ISBN electronic:
978-1-62708-215-0
Publication date:
1993
Book Chapter

Cracking on the Parting Line of Closed-Die Forgings

By
Anthony J. Koprowski
Anthony J. Koprowski
Consultant
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Published:
1993
Page range:
463 - 466

Abstract

An investigation was conducted to determine the factors responsible for the occasional formation of cracks on the parting lines of medium plain carbon and low-alloy medium-carbon steel forgings. The cracks were present on as-forged parts and grew during heat treatment. Examination revealed that areas near the parting line exhibited a large grain structure not present in the forged stock. High-temperature scale was also found in the cracks. It was concluded that the cracks were caused by material being folded over the parting line. The folding occurred because of a mismatch in the forgings and from material flow during trimming and/or material flow during forging.

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Anthony J. Koprowski, 1993. "Cracking on the Parting Line of Closed-Die Forgings", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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