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    • 2. 发明公开
    • 금속 다공체의 확산 침투 합금화 방법
    • 使用堆焊法合金多孔金属的方法
    • KR1020070009031A
    • 2007-01-18
    • KR1020050063959
    • 2005-07-15
    • 한국기계연구원주식회사 포어텍
    • 남기석김경일
    • C22C1/00C22C1/08C22C1/04C23C8/00
    • C22C1/08C22C1/04C22C1/0408C22C2001/081C23C10/14C23C10/30
    • A method for alloying a porous metal by pack cementation of alloy elements is provided to prevent raw material powders from adhering to the porous metal, reduce the process cost by reducing added quantities of powders of alloying elements and activating agents, improve deterioration of work environment and prevent life reduction of process facilities due to Cl2 or HCl gas generated from the activating agents, improve concentration of alloy constituents and perform uniform alloying by increasing precipitation quantities of alloy elements, and prevent deformation of the porous metal without using an expensive jig. A method for alloying a porous metal by a pack cementation process comprises: a step of disposing a porous metal in a raw material powder mixture comprising an alumina powder, a raw material metal powder and an activating agent powder; a step of charging the porous metal together with the raw material powder mixture into a heat treatment furnace; a step of increasing temperature of the heat treatment furnace to a heat treatment temperature while supplying an inert gas into the heat treatment furnace; an exhaustion step of performing exhaustion for a first duration of time to maintain a pressure within the heat treatment furnace to 1 torr or less; an injection step of supplying an inert gas into the heat treatment furnace for a second duration of time to maintain the pressure within the heat treatment furnace to an atmospheric pressure; and a step of alloying the porous metal during a heat treatment time while sequentially repeating the forgoing steps at least once.
    • 提供一种通过合金元件的包装胶合合成多孔金属的方法,以防止原料粉末粘附到多孔金属上,通过减少合金元素和活化剂的添加量来减少加工成本,改善工作环境的劣化, 防止由活化剂产生的Cl 2或HCl气体引起的工艺设备的寿命降低,通过增加合金元素的沉淀量,改善合金成分的浓度并进行均匀的合金化,并且防止多孔金属的变形而不使用昂贵的夹具。 通过包装胶结法合金化多孔金属的方法包括:将多孔金属设置在包含氧化铝粉末,原料金属粉末和活化剂粉末的原料粉末混合物中的步骤; 将多孔金属与原料粉末混合物一起加入到热处理炉中的步骤; 将热处理炉的温度升高到热处理温度同时向惰性气体供给惰性气体的步骤; 在第一持续时间内进行耗尽以将热处理炉内的压力维持在1乇以下的耗尽步骤; 将惰性气体供给至第二持续时间的惰性气体以将热处理炉内的压力维持为大气压的注入步骤; 以及在热处理时间期间使多孔金属合金化的步骤,同时依次重复上述步骤至少一次。