초록 ▼

Metal surfaces are refined, by the process of the invention, to high levels of smoothness in relatively short periods of time. A liquid substance is utilized to produce a conversion coating on the surface of the parts being treated, which are agitated, while being continuously wetted by the substanc

Metal surfaces are refined, by the process of the invention, to high levels of smoothness in relatively short periods of time. A liquid substance is utilized to produce a conversion coating on the surface of the parts being treated, which are agitated, while being continuously wetted by the substance, in a mass finishing unit. Abrasive action causes the relatively soft coating to be removed from the high points of the surface, while leaving substantially intact the coating on the lower surface areas, with the coating being continuously repaired over metal exposed during operation. Fillage of the finishing unit container ensures efficient agitation and continuous oxygenation of the liquid substance, thereby maintaining a desirable rate of reaction and a high rate of surface leveling.

대표청구항 ▼

In a process for refining hard metal surfaces, the steps comprising: A. introducing into the container of a mass finishing unit a mass of elements comprised of a quantity of objects with hard metal surfaces having a finish of arithmetic average roughness in excess of about 15; B. wetting said mass

In a process for refining hard metal surfaces, the steps comprising: A. introducing into the container of a mass finishing unit a mass of elements comprised of a quantity of objects with hard metal surfaces having a finish of arithmetic average roughness in excess of about 15; B. wetting said mass of elements with a liquid substance capable of reaction, under oxidizing conditions, to chemically convert the metal of said surfaces to a substantially stable film of substantially reduced hardness; C. rapidly agitating said mass of elements while maintaining said surfaces in a wetted condition with said substance, said agitation producing relative movement and abrasive contact among said elements and producing continuous oxygenation of said liquid substance; and D. controlling the reactivity of said substance and the intensity of agitation of said mass so as to maintain said film on said metal surfaces at least at the level of visual perceptibility, said agitating step being continued to produce on said metal surfaces a finish of arithmetic average roughness value less than about 14.