| 摘要 |
PROBLEM TO BE SOLVED: To prevent abrasion and separation of a cylinder surface while corrosion resistance including galvanized corrosion is improved by a method wherein a corrosion resistant and abrasion resistant alloy is built up on a surface of parent metal formed with steel casting for welded structure. SOLUTION: A plate cylinder 5A as a printing cylinder of an intaglio printing machine or the like is formed by welding surface hardening material 22 onto a surface of a cylindrical parent metal 21. In this case, the parent metal 21 is manufactured of excellently weldable steel casting for welded structure, and an alloy which is excellent in corrosion resistance and abrasion resistance of cobalt alloy, nickel alloy, or copper alloy is used for the surface hardening material 22. Then, a specific thickness (T1 =1-3mm) hardened surfacing is carried out on the surface of the parent metal 21 by enzyme acetylene gas welding, covered arc welding, (TIG) welding, band arc overlay welding (band welding), laser beam welding of CO2 or the like, or plasma powder build up welding (PTA), etc. Thereby, a plate cylinder which is excellent in corrosion resistance, free from generating surface separation even under intensive pressing, and difficult to be worn. |
