Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
STUDY ON THE HOT WORKING PROPERTIES OF RIMMED STEEL(I)
Toshio IkeshimaTatsuaki Morishima
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1955 Volume 41 Issue 1 Pages 17-23

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Abstract

In order to investigate the cause of the defects of the rimmed steel tubes during the piercing process by the Mannesmann type roll, hot w6rking properties of rimmed steels were studied.
When the cross section.of the billets was macro-etched with the ammonium copper chloride solution, many dark grey spots and black spots were detected in the core of billets.
The results of the rotary hammering tests, impact bending tests and piercing tests showed that the dark grey spots were not so injurious, while the black spots acted as defect point for the hot working.

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© The Iron and Steel Institute of Japan
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