Chevron crack in cold extrusion has been studied in view of deformation conditions and material characteristics. There is V formed chevron crack is occasionally occurred in core part of shaft by multistage free extrusion. Although many research results were reported and theoretical analyses were accompanied, in this study we discussed practical method to prevent chevron crack in the field of working conditions and material characteristics. We have found that chevron crack is eliminated under condition of high hydrostatic state in deformation and decreased segregation, refinement of micro structure of materials.
Taylan Altan;Soo-Ik Oh;Harold L. Gegel ,
Metal Forming / v.,pp., 0000
Metal Forming Processes and Analysis / v.,pp., 0000
이 논문을 인용한 문헌 (2)
1999. "Process Sequence Design of Longneck Flange by Cold Extrusion Process" 소성가공 = Transactions of materials processing : Journal of the Korean society for technology of plastics, 8(2): 160~168
2000. "A Study on the Improvement of Forming Process of Power Assisted Steering Part" 소성가공 = Transactions of materials processing : Journal of the Korean society for technology of plastics, 9(3): 265~273