低碳球铁研究的现状与展望

Present Situation and Prospects of Low Carbon Spheroidal Graphite Iron

低碳球铁是含碳量远低于常规含碳量的球墨铸铁,现在已经发展了四个品种:1)铸态高韧塑性铁素体低碳球铁,2)铸态高强度珠光体低碳球铁,3)准铸态贝氏体低碳耐磨球铁,4)铸态耐热、耐蚀奥氏体低碳球铁。低碳球铁采用传统球铁生产中被认为有“反球化”作用的元素作为球化剂,为球化机理的研究提供新的依据。球化元素与“反球化”元素均为表面活性元素,没有本质的区别。低碳球铁的优点是成本低、性价比高。

The low carbon spheroidal graphiteiron （s.g.iron） is a kind of s.g. iron with carbon content much lower than that of normal s.g. iron. At present, there are four types of low carbon s.g. irons having been developed： 1） as-east hi-toughness ferrite low carbon s.g. iron; 2） as-east hi-strength pearlite low carbon s.g. iron; 3） quasi-as-east wear-resistant bainite low carbon s.g. iron; 4） as-east heat and corrosion-resistant austenite low carbon s.g. iron. Some trace elements which are considered as “anti-spheroidizing elements” in the normal s.g. iron production are adopted as spheroidizing agents for the low carbon s.g. iron production that provided a new basis for the spheroidization mechanism research. There is no essential distinctions between the “anti- spheroidizing elements” and the spheroidizing elements, all of them are surface active elements. The low carbon s.g. iron has the advantage of low cost and high properties/cost ratio.