| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.29 ( November 1993 ) Special Issue on Iron Power ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Service Life Extension Techniques for Cold-Rolling Rolls Yuji Sato, Satoru Midorikawa, Yoshiharu Iwashita, Akio Yokogawa, Takeshi Takano |
|
Synopsis : Research on the various types of rolls in the cold rolling process has been underway to develop materials and surface reforming techniques that can meet the needs for higher-quality sheet steel and surface-treated steel sheets, and improve productivity by extending the periodical repair intervals. Nonwoven-fabric rolls that excel in rigidity, wear resistance, and corrosion resistance were developed as wringer rolls based on a theoretical elucidation of a wringing mechanism. For bridle rolls that control the strip tension on the production line, surface reforming techniques were developed to improve the slip resistance. These include thermal spraying of WC type cermet to maintain the optimal surface roughness and shape, plating, and roughness preparation techniques. Developed for conductor rolls was a coating formation method in which a WC-containing self-fluxing alloy is plasma sprayed and fused to obtain dramatic corrosion and wear resistance. These actions produced highly reliable rolls with a long service life for the cold rolling process. |
| TextiPDF: 9p./443kbj |