大规格钨基高比重合金材料制备技术研究

Study on Preparation Technology of Large-size Tungsten Heavy Alloy

摘要:

本文针对大尺寸高性能钨基高比重合金的制备技术开展一系列研究,研究采用常规原料添加微量元素的方法探讨适用于大尺寸高性能钨基高比重合金材料的成分配比,采用多步骤烧结方法烧结制备大尺寸93WNiFe合金制品,通过烧结过程材料尺寸的监控以及烧结制品实体取样力学性能分析,探索大尺寸钨基高比重合金材料液相烧结过程材料内部组织演变规律,获得4吨重,产品最大直径φ700mm最大高度1400mm的93WNiFe的超大钨合金部件,且产品各部位实体取样抗拉强度大于920MPa延伸率大于20%。

Abstract:

The study focuses on preparation technology of tungsten based heavy alloy (WHA). By adding trace element into traditional raw material, carrying out compositon explonation of large-scaled WHA product. 93WNiFe was chosen and multi-step sintering was adopted for the alloy preparation. By means of surpervisor control product size in sintering process and sampling for mechanical performance analysis, internal organization evolution law was investigated. The final part is weight 4 tons, with maximum diameter 700 mm and maximum height of 1400 mm, and sampling for each part, the product tensile strength is greater than 920 Mpa, elongation more than 20%.