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Volume :36 Issue : 2 2009      Add To Cart                                                                    Download

Effect of chromizing on bonding mechanism of a sheet composite of Brass-Steel-Brass

Auther : BEHZAD TOLAMINEJAD AND HOSSEIN ARABI

School of Materials Science and Engineering, Iran University of Science and Technology, Narmak-Tehran-Iran,

E-mail: btolaminejad@iust.ac.ir

 

ABSTRACT

 

This article describes the effects of roll bonding on bond strength of a sheet composite produced from MS90 (CuZn10) alloy strips and hard chromized St13 steel sheets. Hard chromium applied on the surface of steel sheets acted as joining interlayer. It was found that the joining between these two metals resulted from two different types of bonds: block bonds, between the MS90 strips and the fragmented chromium topcoat layer, and blank bonds, between the MS90 and bare steel surface within the area of the fragmented chromium coating. In addition, the effects of plating time on the thickness of the coating layers which resulted to different area fraction of blank bond during rolling and consequently affected the bond strength of the sheet composite was investigated. Reducing the initial strip thickness and doing annealing heat treatment after rolling can effectively improve the bond strength. A linear relationship observed between the overall bond strength and the area fraction of blank bonds.

 

Keywords: Roll Bonding, Hard Chromizing, Brass-Steel-Brass Composite, Bonding Mechanism.

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