Increasing the corrosion resistance of low-alloy and carbon steels for automobile construction by optimizing the metallurgical technology |
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Authors: | E Kh Shakhpazov I G Rodionova O N Baklanova A I Zaitsev D A Burko A D Gorin S D Zinchenko |
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Affiliation: | (1) I. P. Bardin Central Research Institute of Ferrous Metallurgy, Russia;(2) AvtoVAZ OAO, Russia;(3) Severstal’ OAO, Russia |
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Abstract: | It is shown that the corrosion resistance of automobile sheet can be improved by ensuring that steels of this type have a
low content of corrosion-active nonmetallic inclusions (CANI). The main mechanisms responsible for the formation of CANI in
automobile sheet have been established, and recommendations have been developed to reduce their concentration in this product
• optimize the deoxidation processes that are used by ensuring that the proportions of the additions made to the steel are
consistent with the composition of the ladle slag and that certain key temperature-time parameters of these processes are
maintained
• control the composition of the ladle slag to prevent the formation of solid phases in the slag and their transfer to the
metal; certain conditions must also be observed in the argon blow and the introduction of the addtions.
Use of the above recommendations to make automobile sheet and tube steels cleaner with respect to their content of CANI and
thus help optimize out-of-furnace treatments at metallurgical and pipe plants will make it possible to improve the corrosion
resistance of metal products used in automotive manufacturing.
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Translated from Metallurg, No. 2, pp. 45–48, February, 2006. |
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