利用碳浓度不均匀奥氏体离异共析转变机制,借助于相图计算技术,对UHCs-1.0Al(含Al1.0%wt%)和UHCs-1.5Al(含Al 1.5wt%)两种锻造超高碳钢提出了在三相区奥氏体化并在共析转变温度低限等温球化工艺,并对不同球化组织的力学性能进行了测定.组织观察表明,含Al超高碳钢锻态组织为极细的珠光体组织,Al的添加对网状碳化物有抑制作用,两种超高碳钢经最佳的球化工艺处理后得到了碳化物弥散分布于铁素体基体的复相组织,随碳化物球化程度的提高,塑性指标显著改善.球化UHCs-1.5Al超高碳钢达到了良好的综合力学性能,σb、σs分别为1050MPa和740MPa,伸长率达到14%.
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