Metal working – Method of mechanical manufacture – Roller making
Patent
1994-10-21
1997-03-18
Schwartz, Larry I.
Metal working
Method of mechanical manufacture
Roller making
219 62, B21D 3902
Patent
active
056111436
ABSTRACT:
A process for forming a chilled iron roll for a calender stack. An unfinished roll having a core volume forming the roll radial periphery is provided. An outer radial region of the core volume which has a first microstructure is remelted by passage of electrical current therethrough by means of a pair of electrodes. This region rapidly cools and solidifies, thereby transforming into a second and oriented microstructure which has a higher hardness than the hardness of the first microstructure. The outer radial region of the core volume is subsequently ground smooth to provide a smooth paper web contacting surface for calendering operations.
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Butler Marc W.
Schwartz Larry I.
Voith Sulzer Paper Technology North America Inc.
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