Sensitivity Analysis of Distortion of Carburized Steel Shafts Using Computer Simulations

2016-12-01
Yazır, Büşra
Evcil, Elif
Yıldız, Seçil
Davut, Kemal
Şimşir, Caner
Carburizing and subsequent quenching heat treatments are commonly used industrial processes to improve the properties and performance of steel shafts. Undesired dimensional and shape changes (distortion) related to these treatments are still the most frequent reason for expensive and time consuming corrective operations, low performance during service and even product rejection. The major aim of this study is to identify the suitable control parameters for subsequent optimization of the carburized quenching of stepped shafts made of DIN 16MnCr5 (1.7131) steel. Another aim is to estimate inevitable experimental variations and determine the accuracy of computer simulations in presence of experimental uncertainties in the process parameters. For this purpose, a local sensitivity analysis is conducted using computer simulations in which each control parameter is perturbed around its reference state and the associated dimensional changes were correlated to those perturbations by a dimensionless sensitivity index. The results indicated carburization temperature as the most sensitive parameters while carbon activity in the cementation step, temperature of quenching are ranked second. On the other hand, dimensional changes were found to be insensitive to carburizing and quenching time whereas quenched oil temperature and carbon activity during soaking step before the quenching are determined as less sensitive parameters. ResearchGate Logo Discover the world's research 19+ million members 135+ million publications 700k+ research projects Join for free
Citation Formats
B. Yazır, E. Evcil, S. Yıldız, K. Davut, and C. Şimşir, “Sensitivity Analysis of Distortion of Carburized Steel Shafts Using Computer Simulations,” presented at the 18th International Metallurgy Materials Congress (IMMC2016), İstanbul, Türkiye, 2016, Accessed: 00, 2021. [Online]. Available: http://www1.metalurji.org.tr/immc2016/IMMC2016_Bildiriler.pdf.