由于粉末冶金工艺中的粉末成形，一般采用单轴压力机，在常温下机械压结，在形状及成形密度上有一定的限度，这防碍了其在汽车部件上的推广应用。最近研究人员开发了新的成形工艺，克服了单轴成形的缺陷。在成形件形状中存在与压缩方向垂直的横孔、凹割形状时，以往的粉末单轴? Due to the powder metallurgy powder forming process, the general use of uniaxial presses, mechanical compression at room temperature, the shape and forming density of a certain extent, which hindered its promotion in the automotive components. Recently, researchers have developed new forming processes to overcome the uniaxial forming defects. In the shape of a molded piece, there is a horizontal hole perpendicular to the direction of the compression.