Void formation at large drawing strain in pearlitic steel wires

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To verify the effect of cementite thickness, i.e., the effect of transformation temperatures from austenite to pearlite, on void formation at large drawing strain in pearlitic steel wires, the changes in microstructure and mechanical properties with drawing strain were investigated. The results showed that globular cementites were formed in colonies aligned transversely to the drawing direction at high strains, and that the voids were formed at globular cementites during wiredrawing. The high transformation temperatures induce large globular cementites during drawing due to initial microstructure of thick cementite.

Description

To verify the effect of cementite thickness, i.e., the effect of transformation temperatures from austenite to pearlite, on void formation at large drawing strain in pearlitic steel wires, the changes in microstructure and mechanical properties with drawing strain were investigated. The results showed that globular cementites were formed in colonies aligned transversely to the drawing direction at high strains, and that the voids were formed at globular cementites during wiredrawing. The high transformation temperatures induce large globular cementites during drawing due to initial microstructure of thick cementite.

Additional information

Author(s)

Chul Min Bae and Won Jong Nam, Research Institute of Industrial Science and Technology (RIST), Korea.

Publication/Event/Pages

Paper presented at WAI 66th Annual Convention, Charlotte, NC USA. Paper published in Wire Journal International, July 1997, pg. 102.

Year

1996