Patent ID: 8210999
Filing Date: 2012-07-03
Classification: C04B,C23C,F16C,Y10T

Abstract:
1. A roll for use in a galvanizing pot, comprising a hollow body, and shaft portions connected to said body, said body being made of a silicon nitride ceramic having thermal conductivity of 50 W/(m·K) or more at room temperature, said body having an average surface roughness Ra of 1-20 μm, and said shaft portions being made of ceramics, wherein an inner surface of said body comprises large-diameter regions on both ends and a small-diameter region in between the large diameter regions, and each of said shaft portions is an integral hollow cylinder having a small-diameter portion, a large-diameter portion and a flange connecting said small-diameter portion and said large-diameter portion, said small-diameter portion and said large-diameter portion of each of said shaft portions have approximately the same thickness, and the large-diameter region of said body is connected to and in direct contact with the large-diameter portion of said shaft portion, wherein said flange expands in outer and inner diameter from said small-diameter portion to said large-diameter portion, and wherein said flange is in direct contact with an axial end surface of said hollow body.