| 摘要 |
An injection molded metallic hand tool having a body portion made of a first metal and an active surface portion made of higher hardness metal more capable of operating on the work subject. For example, in a pair of pliers, the serrated jaws have gripping teeth active surface portion is made from a durable, high strength metal such as tool steel alloy and the remainder or body portion is made from stainless steel alloy. The tool is made through a metal injection molding process wherein an amount of high hardness metal particles is first placed or injected into the corresponding tip portion of the mold, then higher strength metal particles are injected to fill the remainder of the mold. In this way, complex bi-metallic parts may be inexpensively injection molded. This also creates an alloy matrix bond between the two different metal portions. |
