MANUFACTURING METHOD OF ROLLING BODY FOR ROLLING SUPPORT DEVICE, ROLLING BODY FOR ROLLING SUPPORT DEVICE, AND ROLLING SUPPORT DEVICE

摘要

PROBLEM TO BE SOLVED: To manufacture an elaborate rolling body identical to one subjected to HIP treatment even in a case of saving the HIP treatment.SOLUTION: A rolling body of a rolling support device employs an oxide based ceramic material that mainly comprises zirconia (ZrO)-alumina (AlO) and has porosity of 2% or less. Provided is a manufacturing method of the rolling body for the rolling support device preparing the rolling body by subjecting the oxide based ceramic material to primary calcination with pressure of 8 MPa or more in inert gas atmosphere and making the oxide based ceramic material subjected to primary calcination into an elaborate state. Also, provided are a rolling body prepared by the manufacturing method, and a rolling support device employing the rolling body.