离心泵是一种靠能量转换输送各类液体(或固液混合物)的叶轮式旋转机械。离心泵的运转可靠性及其使用寿命,在一定程度上与泵所选用的结构材料有关。因此,泵的结构材料的选用,尤其是诸如叶轮、泵壳和转轴等主要零件材料的选用,就自然成为泵在设计过程中需要慎重对待和正确解决的一个重要问题。 Centrifugal pump is a type of impeller rotary machinery that transfers all kinds of liquids (or solid-liquid mixture) by energy conversion. Centrifugal pump operation reliability and service life, to a certain extent, with the structure of the pump selected materials. Therefore, the selection of the structural materials of the pump, especially the selection of the main parts and materials such as the impeller, the pump shell and the rotating shaft, naturally becomes an important issue that the pump needs to be treated cautiously and correctly in the design process.