中国硬质合金模具发展前景向好
硬质合金模具是钢模的的寿命十几倍乃至几十倍，硬质合金模具只有高硬度，高强，耐腐蚀，耐高温和膨胀系数小，一般都是采用钨钴的硬质合金。硬质合金自本世纪20年代初由德国科学家发明以来，以其"widia"似金刚石的名称面市，并首先制作钨丝拉伸模得到工业应用，取代了当时价格昂贵的金刚石拉伸模。 我国硬质合金起步虽晚，但发展迅速。据介绍，目前，硬质合金模具基本上已系列化和标准化。从近几年发展情况来看，我国硬质合金模具的研究和设计的理论已更深入也更科学，应用也更广泛。 在开发新型硬质合金材料上，前几年以铁镍代钻为热门。如湖南省冶金材料所开发的相当于YG、YG20、YG25的高强韧性硬质合金，在用于冷镦模、冷挤压模等方面收到较好的效果。天津硬质合金研究所也以铁镍代钻研制了相当YG1520的硬质合金模具材料，在标准件的滚锻、钢球冷镦方面与YG20效果相当。 近几年来新的研究热门是细晶、超细晶，甚至纳米晶硬质合金和梯度硬质合金。梯度硬质合金又有成分梯度、组织结构梯度等，此外也有用金属熔液渗透处理方法来生产梯度硬质合金的，如梯度硬质合金顶锤等。 细晶和超细晶硬质合金也已面市，如细晶YGS拉丝模在拉制<φlmm的钢丝时，是一般拉丝模的3倍。 此外，还有镶铸、镶嵌硬质合金热作模具，在轧管与线材轧制方面取得了很好的效果。
德福生金属粉末有限公司转载
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