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发明公开
CN1316538A 双层复合异形石墨铸铁模具材质 失效 - 权利终止

双层复合异形石墨铸铁模具材质
摘要：
一种双层复合异形石墨铸铁模具材质，其特征在于最大限度地回用废铁屑，对含有Cu、Cr、低合金化的蠕墨铸铁铁水用少量Li、Ba、K、Na碱金属盐与B－Fe复合施行特殊变质处理，配合利用特种芯激冷工艺获得模具内表面层球状石墨，外部蠕虫状石墨的粒状珠光体基双层复合异形石墨自生复合铸铁材质。其力学性能：抗拉强度σb≥405－450N/mm2，硬度HB=180－230。本铸铁模具生产成本低，使用寿命长，生产工艺简便易行，适于推广应用。
摘要（英）：

A dual-layer shaped graphite-cast iron mould features the maximum use of waste iron filings. The molten low-alloy creep graphite cast iron containing Cu and Cr is specially modified by the salts of Li, Ba, K, Na and B-Fe to generate the spherical graphite on internal surface of mould. Its external surface is a composite cast iron generated by creep graphite. Its advantages include high pull strength (405-450 N/sq.mm) and hardness (HB=180-230), low cost and long service life.

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