YVO₄レーザを用いたステンレス鋼の発色加工

鋭敏色の発色管理と寿命の改善

抄録

Recently, stainless steel and titanium are mainly used as a structure material. And some surface treatments regarding coloring for these metals are used for producing high quality industrial product. In previous study, we have proposed that coloring for stainless steel and titanium using YVO₄ laser became possible, and the desired colors could be made by the inverse analysis using neural network. In this paper, controlling regarding coloring of the sensitive color and improvement regarding life of color were investigated to achieve high quality treatment. The ON/OFF regarding irradiation of a laser was decided by two steps data using both white and black on the conventional coloring. Sensitive color could not be made by this method because of large energy gap between each irradiation for very sensitive coloring. Therefore, we used intermediate data for controlling the ON/OFF regarding irradiation of the laser. The optimum data was made by the gray colors with the optimum level which were divided equally from white (=0 bit) to black (=256 bit). Then, improvement regarding life of color was experimented by some samples with the differ pitch of irradiation. It is concluded from the results that (1) New coloring method was effective for controlling regarding coloring of the sensitive color, (2) Coloring with fine pitch of irradiation on the stainless steel could improve regarding erosion.