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This document is the final report on an industrial evaluation of wire-drawability of AISI 302 austenitic stainless steel for springs, in respect to their surface state. Methodological work allowed definition of common surface state criterions, as well as common wire-drawing testing methods; each wire-rod evaluation was conducted on 10 tons or more of wire-rod. Three dimensional roughness measurements allowed a better understanding of some surface state differences by using a valley connexity and bearing ratio criterions. Comparative work showed that too smooth or too lined surface states, which resulted from rapid cooling at the exit of hot rolling, do not lead to good drawing ability. Surface states resulting from continuous thermal treatment at the hot rolling exit or from batch quench annealing, may show some different aspects, depending particularly of the pickling process. All of them gave good results on drawing tests, even for high reduction ratios. This study allowed selection, for wire-drawing, the process with thermal treatment at hot-rolling exit, and to experiment with high reduction drawing processes.

Additional information

Authors: HAUSER J, Ugine Savoie (FR)
Bibliographic Reference: EUR 15511 FR (1996) 37 pp., FS, ECU 7.00
Availability: Available from the (2)
ISBN: ISBN 92-827-5906-7
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