| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.17 ( October 1987 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Surface Treatment Techniques for Process Rolls in Steelworks Satoshi Kasai, Yuji Sato, Akihiro Yanagisawa, Akira Ichihara, Hiromu Onishi |
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Synopsis : Studies on surface treatment techniques of process rolls, except for working rolls in iron and steel works, were carried out by taking account of the operating conditions. Welding materials of rolls used in the continuous casting process and hot rolling process were developed, which would particularly satisfy such properties as adhesion resistance, heat-check resistance and wet-corrosion resistance. It was found out that CrC cermet with a superior wear-resistance property at high temperature and the CoCrAlY alloy with a build-up resistance property were suitable for hearth rolls. Furthermore, it was found out that WC containing Ni self-fusing alloys were suitable for conductor rolls and WC thermal spray materials were suitable for rolls used in the cold rolling process. Reliability and long-life of various process rolls were improved by these new techniques. |
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