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2. 发明授权

US3988515A Case-hardening method for carbon steel 失效
标题翻译：碳钢表面硬化方法
公开(公告)号：US3988515A
公开(公告)日：1976-10-26
申请号：US548971
申请日：1975-02-11
申请人： Hiroshi Hashimoto , Kiyomitsu Suga , Toshio Shimizu
发明人： Hiroshi Hashimoto , Kiyomitsu Suga , Toshio Shimizu
IPC分类号： C23C16/32 , C23C10/36 , C23C10/54 , C23C9/02
CPC分类号： C23C10/54 , C23C10/36 , Y10T428/31678
摘要： A case-hardening method for forming a hardened layer on the surface of carbon steel of high toughness and hardness is provided which comprises forming a powdered mixture of titanium in an amount of 5 to 30% by weight of said mixture, chromium in an amount such that the weight ratio of chromium to titanium is within the range of 2 to 10, alumina and a catalyst, embedding carbon steel in said powder mixture, and then subjecting said mixture to a heat treatment to form a hardened layer mainly composed of titanium carbide. The method may also be carried out by coating the surface of carbon steel with alumina, preparing a powder mixture containing titanium in an amount of 5 to 30% by weight of said mixture chromium in an amount such that the weight ratio of chromium to titanium is within the range of 2 to 10, alumina and a catalyst, then embedding said alumina-coated carbon steel in said powder mixture, and then subjecting said mixture to a heat treatment to form a hardened layer mainly composed of titanium carbide.
摘要翻译：提供一种用于在高韧性和硬度的碳钢表面上形成硬化层的表面硬化方法，其包括以所述混合物的5至30重量％的量形成钛的粉末混合物，其量为铬与钛的重量比在2〜10的范围内，氧化铝和催化剂，将碳钢包埋在所述粉末混合物中，然后对所述混合物进行热处理以形成主要由碳化钛组成的硬化层。该方法也可以通过用氧化铝涂覆碳钢表面来进行，制备含钛量的粉末混合物，其量为所述混合物铬的5至30重量％，其量使铬与钛的重量比为在2至10的范围内，氧化铝和催化剂，然后将所述氧化铝涂覆的碳钢包埋在所述粉末混合物中，然后对所述混合物进行热处理以形成主要由碳化钛组成的硬化层。

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