根据国内某阀门厂出口钛制蝶阀的需要,宝鸡有色金属加工厂,利用国内最大的ZT-500型直空凝壳炉,于1994年4月,成功地试制出一批φ1050mm,单件重量达265kg的ZTA2大蝶阀,这是我国自1967年开始钛的铸造以来,国内生产的重量最大的钛铸件.在这一大型钛铸件试制中,克服了造型材料的选择、铸型的设计、铸型的真空除气等一系列困难,并制定了最佳的熔铸工艺,从而保证了铸件的冶金质量.该批大型 According to the need of exporting titanium butterfly valve from a domestic valve factory, Baoji Nonferrous Metals Processing Factory successfully developed a batch of φ1050mm, single piece weight up to the largest ZT-500 straight emplacement shell furnace in China in April 1994 265kg ZTA2 butterfly valve, which is the largest titanium castings produced domestically since the titanium casting in our country began in 1967. In the trial production of large-scale titanium castings, the selection of modeling materials, design of molds, molds Vacuum degassing and a series of difficulties, and developed the best casting process, thus ensuring the quality of the metallurgical castings.The batch of large