| 摘要 |
PURPOSE:To improve corrosion resistance and abrasion resistance of the inside surface of a blank material of cylinder easily and inexpensively, by heating a pipe-like steel material while rotating the same and dispersing and sticking powder of a self-fluxing alloy uniformly on the inside surface and further remelting the same with laser beams. CONSTITUTION:The inside surface of a blank material 1 for cylinders consisting of iron or steel material is applied with a rust preventive treatment and is further defatted and washed; thereafter, an end plate 5 having a shaft 7 for transmission of rotating force is bolted 6 to said material to close one end. Powder 9 of a self-fluxing alloy of Ni base or the like consisting of Ni, Cr, B, Si, etc. is dispersed uniformly in the material 1 and the open end is closed by bolting 11 an end plate 10 thereto. While the material 1 is rotated horizontally, the material is heated from the outside circumference to melt the alloy 9, whereby a uniform lining layer 2 is formed. Thereafter, the end plate 10 is removed, and the laser light 13 generated with a laser light source 12 of CO2 from the open end part is irradiated by using a reflecting mirror 4 to the layer 2 cause zone fusing again; thereafter, the material is cooled at the lowest rate, whereby the film of the uniform metallic compsn. is obtained. |
