发明了一种6N纯度及以上的铼粉和铼制品及其制备方法。铼粉的制备方法包含：将市售4N铼酸铵依次进行真空预烧结、第一氢气还原、真空高温烧结、研磨烘干、多次第二氢气还原处理，制得铼粉；将上述的铼粉装入模具内，然后依次进行压制成型、高温热处理、冷轧与退火热处理，制得铼制品。铼粉纯度可达6N及以上，铼坯通过酸洗和退火处理消除应力和净化纯度技术，制备出高纯、超高纯的大尺寸铼制品。

Invented a rhenium powder and rhenium product with a purity of 6N and above, and a preparation method thereof. The preparation method of rhenium powder includes: sequentially performing vacuum pre-sintering, first hydrogen reduction, vacuum high-temperature sintering, grinding and drying, and multiple second hydrogen reduction treatments on commercially available 4N ammonium rhenate to obtain rhenium powder; The powder is put into the mold, and then press forming, high temperature heat treatment, cold rolling and annealing heat treatment are carried out in sequence to obtain rhenium products. The purity of rhenium powder can reach 6N and above. The rhenium billet is processed by pickling and annealing treatment to relieve stress and purify purity technology to prepare high-purity, ultra-high-purity large-size rhenium products.