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    • 9. 发明公开
    • METHOD OF METAL SURFACE HARDENING TREATMENT INDUCING TRANSFORMATION
    • 金属表面硬化处理诱导转化的方法
    • EP1997917A1
    • 2008-12-03
    • EP07706721.3
    • 2007-01-15
    • Osaka UniversityKimura Chuzosho Co, LTD.
    • FUJII, HidetoshiYAMAGUCHI, YasuhiroKANNO, ToshitakeFUKUDA, Yoya
    • C21D1/06C21D5/00C21D6/00
    • C21D9/32C21D1/06C21D5/00C21D6/00C21D7/13
    • A method of metal surface hardening treatment inducing transformation, in which transformation is induced in a surface interior of material as hardening treatment object by simple, rapid treatment utilizing a frictional heat under pressure without the occurrence of melt loss, quench crack, soft spot, deformation, etc. to thereby reform the structure of surface interior of material as hardening treatment object into a miniaturized martensitic structure. The method of surface hardening treatment comprised the steps of while rotating nearly cylindrical pressurization tool (2) at high velocity, pressing the bottom face thereof slightly into the surface of material as hardening treatment object (1) so as to attain application of given pressure, thereby generating a local frictional hear between the pressurization tool and the material as hardening treatment object; inducing transformation in the material as hardening treatment object at the locality having been exposed to the frictional heat; and when the surface of material as hardening treatment objent positioned in the vicinity of the pressurization tool starts to soften by the frictional heat, moving the pressurization tool.
    • 一种金属表面硬化处理诱导相变的方法,其中通过在压力下利用摩擦热的简单,快速处理而在材料的表面内部引起相变而不发生熔损,淬火裂纹,软点,变形 从而将作为硬化处理对象的材料的表面内部的结构改性成小型化的马氏体组织。 表面硬化处理的方法包括以下步骤:一边高速旋转近似圆柱形的加压工具(2),一边将其底面略微压入作为硬化处理物体(1)的材料表面,以便施加给定的压力, 由此在加压工具和作为硬化处理对象的材料之间产生局部摩擦听觉; 在已经暴露于摩擦热的位置处引起作为硬化处理对象的材料中的变形; 并且当位于加压工具附近的作为硬化处理目标的材料的表面开始由于摩擦热而软化时,移动加压工具。