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    • 9. 发明授权
    • Method of laser quenching
    • 激光淬火方法
    • US5182433A
    • 1993-01-26
    • US780500
    • 1991-10-22
    • Hiroki SakamotoHidenobu MatsuyamaKimihiro Shibata
    • Hiroki SakamotoHidenobu MatsuyamaKimihiro Shibata
    • C21D1/09
    • C21D1/09
    • A method of laser transformation hardening adapted to irradiate a laser beam in a sense of P polarization on a work piece at an angle of incidence to a surface of the work piece of 60.degree. or more which comprises steps of: forming a plurality of triangular ridges on a horizontal plane adjacent to a surface of the work piece, having a first plurality of inclined surfaces inclined at a first angle to the horizontal plane and a second plurality of inclined surfaces inclined at a second angle to the horizontal plane, the first angle being smaller than the second angle; and irradiating the laser on the work piece at the angle of incidence to the surface of the work piece of 65.degree. to 70.degree. from a direction on the side of the second plurality of inclined surface.
    • 一种激光变换硬化的方法,其适用于以与60度以上的工件的表面成角度的方式在工件上照射P极化的激光束,该方法包括以下步骤:形成多个三角形脊 在与所述工件的表面相邻的水平面上具有与所述水平面倾斜成第一角度的第一多个倾斜面和与所述水平面倾斜第二角度的第二多个倾斜面,所述第一角度为 小于第二角度; 以及从第二多个倾斜面的一侧的方向以与工件表面65°〜70°的角度的入射角将激光照射在工件上。
    • 10. 发明授权
    • Laser hardening device
    • 激光淬火装置
    • US5313042A
    • 1994-05-17
    • US892886
    • 1992-06-03
    • Hidenobu MatsuyamaKimihiro ShibataHiroki Sakamoto
    • Hidenobu MatsuyamaKimihiro ShibataHiroki Sakamoto
    • B23K26/06B23K26/14C21D1/09B23K26/00
    • B23K26/0643B23K26/1438B23K26/147C21D1/09
    • A laser hardening device for forming a hardened layer on the surface of an object irradiated by a laser beam is so arranged as to emit a laser beam which is linearly polarized in the incidence plane containing the normal to the surface and the optic axis of the laser beam irradiating the surface. The device comprises a first concave mirror for condensing the laser beam the incidence plane, and a second concave mirror for condensing the laser beam in a perpendicular plane to the incidence plane, the first concave mirror being disposed closer than the second concave mirror to the laser oscillator in the path of the laser beam. Laser beam is therefore absorbed at a high absorption rate by the object, and a hardened layer is formed without coating a laser absorption agent onto the object. The incidence angle of the laser is preferably no less than 60 degrees, and by arranging that the laser beam is parallel on the irradiated surface, a uniform, hardened layer is obtained. Moreover, by blowing shield gas on the irradiated surface from a gas nozzle provided with a smoothing mechanism such as metal mesh, oxidation of the hardened layer or surface melting due to oxidation is prevented and a more desirable hardened surface is obtained.
    • 用于在被激光束照射的物体的表面上形成硬化层的激光淬火装置被布置成发射在包含激光的表面和光轴的法线的入射平面中线性偏振的激光束 光束照射表面。 该装置包括用于将激光束聚焦入射平面的第一凹面镜和用于将激光束在与入射平面垂直的平面中聚光的第二凹面镜,第一凹面镜被设置成比第二凹面镜更靠近激光 振荡器在激光束的路径中。 因此,激光束以物体的高吸收率被吸收,并且形成硬化层而不在激光吸收剂上涂覆物体。 激光的入射角优选为60度以上,通过将激光束平行配置在照射面上,得到均匀的硬化层。 此外,通过从设置有金属网的平滑机构的气体喷嘴在被照射的表面上吹扫保护气体,防止了由于氧化而导致的硬化层的氧化或表面熔融,并且获得了更理想的硬化面。