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航材股份获专利，环形排布蜡模以减少细长钛合金铸件变形

11月6日，航材股份（688563）的发明专利《长径比大于15的钛合金铸件熔模铸造工艺及钛合金铸件》获授权，申请号为CN202310076581.6。

专利面向长径比超过15的细长钛合金零件。工艺没有让每根蜡模独立进入制壳和浇注，而是把多个铸件蜡模沿圆周排开，再沿长度方向用多组连接件相互固定。整体制壳之后，依次焙烧脱蜡、浇注及清理，最后切开连接位置取得各件铸件。这套布置针对的是航空发动机用钛合金长杆在熔模铸造中容易发生的变形。

截至此次授权消息披露时，航材股份今年获得的各类专利授权共28项，比上年同期增加250%。在2026年上半年，公司研发投入为8412.94万元，同比减少8.24%。企业知识产权记录中，北京航空材料研究院股份有限公司名下可查到374条专利信息和3条著作权信息。

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