【摘要】 在普通亚共晶灰口铸铁的基础上，加入Ｗ、Ｍｏ、Ｃｕ合金元素，获得铸态贝氏体灰口铸铁。这种铸铁的抗拉强度可达到４５０～５５０ＭＰａ，硬度为２８０～３５０ＨＢＳ。利用透射电镜、扫描电镜等检测手段对贝氏体组织形态进行分析，证实了这种铸态贝氏体是由大量板条状无碳化物贝氏体和少量针状贝氏体组成，在针状贝氏体中有平行分布的极细小杆状碳化物条束。更多还原

【Abstract】 Based on common hypoeutectic grey-cast iron,a bainitic grey-cast iron was obtained by adding alloying elements of W,Mo and Cu. The tensile strength of this cast iron is up to 450～550 MPa and hardness is HBS 280～350. The morphology of bainite in W-Mo-Cu bainitic grey-cast iron was studied by transmission electron microscope and scanning electron microscope.It is confirmed that this bainite consists of large quantity of platelet bainite without carbide and small quantity of acicular bainite with very fine stick-like carbide of parallel distribution更多还原