2007 Volume 93 Issue 5 Pages 367-372
Recently, hot rolling with a severely high redution was developed to make the ultra fine grained steels. The high reduction in the hot rolling caused some troubles such as increase of the rolling load, occurrence of friction pick up and so on. To solve these problems, new lubricants with high coefficient of friction at biting and low coefficient of friction during hot rolling must be developed. The lubricants cannot be estimated using the two-disks testing machine or the pin-on-disk testing machine. So, a testing machine to simulate hot rolling in the laboratory has been developed by the author et al. The performance of the simulator is evaluated at a hot rolling temperature of 800°C using SPHC strip with a width of 22 mm and a thickness of 9 mm, SKD61 roll with a diameter of 100 mm and a width of 60 mm and new lubricants. Results from experiment to measure the coefficient of friction decided the lubricity of the lubriconts in hot rolling with a severely high reduction can be evaluated.
