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经激光辐射处理的刀具在使用过程中,不仅其表面层的硬度,而且耐热性(红硬性)都具有重大意义,因为正是红硬性决定刀具受热时硬度下降的程度.众所周知.工具钢可通过提高淬火时的奥氏体化温度来保证用合金元素饱和固溶体,从而提高耐热性.但是,这将导致晶粒显著长大而使钢变脆。规定了工具钢标准整体强化处理时的奥氏体化上限温度,例如p18钢为1290℃.提高这一温度将导致晶粒显著长大并降低钢的强度。
Laser-irradiated tools are of great importance not only in the hardness of the surface layer but also in the heat resistance (red hardness) of the tool during use, since it is the degree of hardness that decides the hardness of the tool when it is heated. Increasing the austenitizing temperature during quenching ensures that alloying elements are used to saturate the solid solution to increase heat resistance, however, this will result in significant grain growth and brittleness of the steel. Specifies the maximum austenitizing temperature for tool steels as a whole, eg p18 steels at 1290 ° C. Increasing this temperature results in significant grain growth and decreases the strength of the steels.