本文係利用金屬粉末成型料之可熱塑成型優點，與粉末冶金燒結技術，發展金屬粉末熱壓模造技術。本實驗第一部份使用田口式實驗設計求得440C不鏽鋼金屬粉末（粉末平均粒徑4μm）生胚經脫脂及預燒結後之最佳燒結條件為：燒結溫度1250℃、升溫速率10℃/min及燒結時間5小時，其最佳化密度為7.52g/cm3；第二部分進行微深孔熱壓模造成型，分別使用圓柱形及圓柱末端俱螺紋形之心蕊，置於兩片440C不鏽鋼板材生胚之間，進行熱壓模造及燒結，分別製得直徑250μm微深孔，及直徑250μm且末端螺紋外徑1500μm之微深孔，原本直徑250μm的微深孔，因為孔洞向外擴散進而擴大為300μm；第三部分進行微結構熱壓模造成型，分別將絲網及最密堆積不鏽鋼球作為微結構模仁，並將圖形轉印至平板生胚，兩種模仁內的模穴皆為開放性，因此在熱壓模造過程中，氣體較容易排出，使生胚能完全填滿於模穴中，且不鏽鋼球受到模流推擠及不鏽鋼球與生胚間摩擦力作用，產生自我調適滾動，進一步使生胚更容易地填滿於模穴中。微結構生胚經過脫脂、預燒結及使用最佳燒結條件製得緻密具微結構的440C不鏽鋼燒結體，其中因為孔洞向外擴散，網目微燒結體景深（depth of field）由深變淺，且最密堆積結構的頸部區域產生收縮。 In this paper, a study on the production of 440C stainless steel micro-hole and microstructure by powder hot emboss molding is presented. The study also used the Taguchi method to find out the optimizing parameter for sintering 440C stainless steel（mean powder size is 4μm）, which the optimum density of 7.52g/cm3 was achieved with a sintering temperature of 1250℃, a heating rate of 10℃/min and heating time for 5 hrs. Two types of mold were used the molding was conducted on a conventional hot embossing molding machine. The study showed that the dense 440C stainless steel microstructures of inner diameter 250μm hole and outer diameter 1500μm spiral can be hot emboss molded at optimum sintering parameters. Additional, 3D tri-conical array microstructures are successfully carried out with a stamp with close-packed 304 stainless steel ball designed, during hot emboss molding, the green-compacts can be filled fully with the cavity between the free standing with rotated 304 stainless steel ball.
