最近,罗马尼亚研究了一种新方法—烧结铸造法生产高耐磨的钻头。烧结铸造法是把金属粉末烧结法和金属铸造法合二为一地生产用一般方法难以加工的金属零部件的一种新方法。具体作法是,先在具有所要生产零部件形状和 Recently, a new method was developed in Romania - sinter casting to produce highly abrasive bits. Sintering is a new method of producing metal parts that are difficult to machine in the usual way by combining the metal powder sintering method and the metal casting method. The specific approach is to first have the shape of the parts and components to be produced