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6月11～15日,航空工业部在长沙召开无熔剂熔炼铸造镁合金新工艺技术鉴定会。会议由该部科技局胡忠同志主持,与会有24个单位的68名代表。 以往熔炼镁合金,为了防止镁液的氧化燃烧和去除氧化夹杂物,普遍采用以KCl、MgCl_2、BaCl_2和CaF_2为主的氯盐、氟盐熔剂进行复盖与精炼。这种传统工艺具有许多严重缺点。该部七九年组织攻关组,开展对镁合金无熔剂熔炼新工艺的试验研究。经过三年多的努力,最近终于获得成功,效益十分显著。 会议首先由攻关组有关工厂分别介绍了他们几年来采用单纯SF_6和CO_2+SF_6混合气体进行保护熔
June 11 ~ 15, the Ministry of Aviation Industry held in Changsha, melting-free melting of magnesium alloy casting new technology appraisal meeting. The meeting was hosted by Comrade Hu Zhong of the Ministry of Science and Technology Bureau of the Ministry of Science and Technology. There were 68 representatives from 24 units participating in the conference. In the past smelting magnesium alloy, in order to prevent the oxidative combustion of magnesium solution and removal of oxide inclusions, commonly used KCl, MgCl_2, BaCl_2 and CaF_2-based chloride, fluoride salt flux covering and refining. This traditional process has many serious drawbacks. In 1979, the Ministry organized a research group to conduct experimental research on a new fluxless melting process for magnesium alloys. After more than three years of hard work, it has finally succeeded and its effectiveness is remarkable. The meeting first of all by the research group related factories were introduced in the past few years they used simple SF_6 and CO_2 SF_6 mixed gas protection melting