本文制定了针状贝氏体球铁离心复合轧辊的生产工艺。
The centrifugal compound casting process of needle-like bainite ductile iron roller was establish in this paper.
结果表明，该低碳贝氏体钢的微观组织主要为板条贝氏体、粒状贝氏体、准多边形铁素体及针状铁素体的复合组织。
The results indicate that the microstructure of specimen is mainly lathe bainite, granular bainite, quasi-polygonal ferrite and acicular ferrite.
准铸态贝氏体低碳球铁韧塑性的提高，与其组织中形成的大量奥氏体和镶嵌在当中的针状无碳贝氏体密切相关。
The enhancement of toughness and plasticity of quasi-as-cast bainite low carbon ductile iron is contributed by the large amount of austenite and acicular carbon-free bainite inlaying in the austenite.
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