镍基高温合金生产用原材料有害杂质的控制

发布时间：2018-07-15 20:37

【摘要】：航空发动机推重比不断增大、涡轮进口温度不断提高,对优质镍基高温合金热端零部件的综合性能提出了更高的要求。合金材料的质量取决于化学组成和铸态组织结构,这就要求高温合金生产必须首先严格控制合金成分和降低有害元素的质量分数。实际生产中,残留在镍基高温合金中的有害杂质铅、锡、砷、锑、铋、硒以及氧、氮、硫等采用一般精炼技术很难去除,合金材料的洁净度很大程度上取决于原材料的洁净度。随着中国高温合金生产企业设备和工艺水平的提高,原材料的有害杂质质量分数已成为限制优质高温合金稳定生产的瓶颈。基于对原材料中有害元素来源的分析,提出从矿源选择、原料金属提取和精炼、废旧合金的净化利用及炉料入炉前的处理等途径对原材料质量进行综合控制。
[Abstract]:The ratio of thrust to weight of aero-engine is increasing and the inlet temperature of turbine is increasing. The comprehensive performance of hot end parts of high quality nickel-based superalloy is required higher. The quality of alloy materials depends on their chemical composition and as-cast structure, which requires that the composition of superalloy must be strictly controlled and the mass fraction of harmful elements should be reduced. In actual production, it is difficult to remove the harmful impurities such as lead, tin, arsenic, antimony, bismuth, selenium, oxygen, nitrogen, sulfur and so on. The cleanliness of alloy materials depends on the cleanliness of raw materials to a great extent. With the improvement of equipment and technology level in China's superalloy production enterprises, the harmful impurity mass fraction of raw materials has become the bottleneck to restrict the stable production of high-quality superalloy. Based on the analysis of the sources of harmful elements in raw materials, it is proposed that the quality of raw materials should be controlled synthetically from the selection of ore sources, the extraction and refining of raw materials, the purification and utilization of waste alloys and the treatment of raw materials before they are put into the furnace.
【作者单位】：东北大学冶金学院;
【基金】：国家自然科学基金重点支持资助项目(U1560203) 山西省镍基重点科技攻关资助项目(MC2014-03)
【分类号】：TG132.3;V252;V263

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