| 摘要 |
PURPOSE:To manufacture a roll for molten metal bath superior in resistance to corrosion, heat, wear and wetting, by roughening the surface of metal roll, spraying metal thereon, then water plasma spraying ceramics to said roll. CONSTITUTION:A metal rod 2 having the same diameter as journal part is prepared as bath roll such as sink roll used in vessel for molten metal plating bath, whole surface thereof excluding journal part is roughened by grid blasting, etc. A porous metallic layer 3 of Ni-Al alloy, etc. is formed on the surface to 0.2- 0.3mm. thickness by plasma arc or flame spraying of metal. Next, a ceramic cover layer 1 of Al2O3, ZrO2, TiO2, MgO, SiO2, etc. is further formed by 20-30mm. thickness thereon by water plasma spraying method, to manufacture the bath roll having long service life without cracking, exfoliating in molten metal. |
