摘要
采用钛板切边、钛屑、钛坯切头及高纯原料制备了TC4合金铸锭,从成分、微观组织、硬度等方面系统分析了不同类型碎钛料对离心铸造技术的适用性。结果表明,四类铸锭中N、O、H等杂质元素的含量均符合GB/T6614−2014要求;但是,由于碎钛料在不同的热加工过程中会发生物理和化学变化,从而对合金凝固过程产生重要影响,使铸锭微观组织和性能存在一定差异。四类铸锭的硬度均满足GB/T6614−2014要求,这进一步证实了离心铸造技术可以较好地适用于碎钛料回收。热处理后,4^(#)合金的微观组织均匀化程度显著改善,异常组织区域完全消失。真空气淬工艺Ⅰ处理后试样的硬度值(HRC)最大,为32.5。
In this study,TC4 alloy ingots were prepared using surplus titanium plate,titanium chip,surplus titanium billet and high-purity raw material.The suitability of centrifugal casting technology to different scrap titanium was systematically analyzed in terms of composition,microstructure and hardness.The results show that the contents of N,O and H elements in the four ingots satisfy the requirements of GB/T6614-2014.However,due to the physical and chemical reactions that occur in scrap titanium materials during different hot forming processes,they can have an important influence on the solidification process of TC4 alloys,resulting in some differences in microstructural and mechanical properties of ingots.In addition,the hardness of the four ingots meets the requirements of GB/T6614-2014,which further confirms that the centrifugal casting technology can be applied to the recovery of scrap titanium.After heat treatment,the microstructure homogenization of 4^(#)alloy was significantly improved,and the abnormal areas disappeared.The maximum hardness value of 32.5 HRC was obtained for the samples treated by vacuum argon quenching process Ⅰ.
作者
贺同正
吴敬玺
罗国军
沈选金
唐丽英
陈玉勇
HE Tongzheng;WU Jingxi;LUO Guojun;SHEN Xuanjin;TANG Liying;CHEN Yuyong(Pangang Group Panzhihua Research Institute of Iron&Steel Co.,Ltd.,Panzhihua 617000,Sichuan,China;Sichuan Provincial Engineering Research Center of Aerospace Titanium Alloy Precision Castparts,Panzhihua 617000,Sichuan,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China)
出处
《钢铁钒钛》
北大核心
2025年第2期39-45,82,共8页
Iron Steel Vanadium Titanium
关键词
碎钛料
TC4合金
微观组织
硬度
真空热处理
scrap titanium
TC4 alloy
microstructure
hardness
vacuum heat treatment
