北京航空航天大学学报 ›› 2016, Vol. 42 ›› Issue (11): 2466-2471.doi: 10.13700/j.bh.1001-5965.2015.0683

• 论文 • 上一篇    下一篇

再生型壳与ZTC4熔体的界面稳定性

柴连静1, 程序1, 吴国清1, 王红2, 南海2,3   

  1. 1. 北京航空航天大学 材料科学与工程学院, 北京 100083;
    2. 北京百慕航材高科技股份有限公司, 北京 100080;
    3. 北京航空材料研究院, 北京 100096
  • 收稿日期:2015-10-20 修回日期:2016-01-22 出版日期:2016-11-20 发布日期:2016-04-11
  • 通讯作者: 吴国清,Tel.:010-82313240,E-mail:guoqingwu@buaa.edu.cn E-mail:guoqingwu@buaa.edu.cn
  • 作者简介:柴连静,女,硕士研究生。主要研究方向:钛合金精密铸造。E-mail:chailianjing@163.com;吴国清,男,博士,副教授。主要研究方向:轻质合金及复合材料设计与成型技术。Tel.:010-82313240,E-mail:guoqingwu@buaa.edu.cn
  • 基金资助:
    中国博士后科学基金(2014M550587)

Interfacial stability of regenerated moulds against molten ZTC4 alloy

CHAI Lianjing1, CHENG Xu1, WU Guoqing1, WANG Hong2, NAN Hai2,3   

  1. 1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. Baimtec Materials Co., Ltd., Beijing 100080, China;
    3. Beijing Institute of Aeronautical Materials, Beijing 100096, China
  • Received:2015-10-20 Revised:2016-01-22 Online:2016-11-20 Published:2016-04-11

摘要: 从研究再生型壳中几种典型金属离子对铸件表面的污染影响规律入手,通过在型壳材料中添加Al、Nb和Mn等金属元素实际浇铸ZTC4合金(Ti-6Al-4V),探讨不同残留金属在铸造过程中对铸件表面质量、陶瓷/钛合金界面成分、组织形貌及显微硬度等的影响,揭示废弃型壳材料中铸造残留金属对钛合金新铸坯陶瓷/合金界面稳定性的影响规律。结果表明:含Al、Nb和Mn等金属残留的型壳浇铸ZTC4合金,铸件表面外观平整无明显铸造缺陷;相比无金属残留型壳,含残留金属型壳的铸件表面粗糙度明显增加;Al金属残留对型壳与熔融钛合金界面稳定性的影响较小,而Nb和Mn金属残留能明显降低型壳与熔融钛合金的界面稳定性,铸件表面粗糙度可以在一定程度上反映界面稳定性;当型壳中含有Al金属残留时,陶瓷/合金界面处析出Ti5Si3相。

关键词: 钛合金, 精密铸造, 陶瓷型壳, 界面反应, α层, 回收

Abstract: Aimed at the effect rules of several typical metal ions from reclaimed shells on contaminating casting surface, with the method of adding metallic elements such as Al, Nb and Mn to shell materials used to actually cast ZTC4 alloy (Ti-6Al-4V), this study analyzed the influence of different residual metals in casting process on casting surface quality, ceramic/titanium alloy interaction compositions, microstructure morphology and micro-hardness, and discussed the impact of residual casting metal in recycled mould materials on the interface stability between ceramic mould and new titanium alloy cast. The results show that the cast surface of ZTC4 alloy using moulds containing Al, Nb or Mn ions looks smooth with no obvious casting defects; compared with none metal containing mould, the roughness of ZTC4 cast using shells with residual metal increases markedly; Al vestigital had little effect on the interface inertness of ceramic against molten titanium alloy, while Nb and Mn can obviously reduce the interface inertness, and to some degree, casting surface roughness can reflect the interface stability; when the mould contains Al, Ti5Si3 phase is found at ceramic/metal interface.

Key words: titanium alloy, investment casting, ceramic mould, interface reaction, alpha-case layer, recycling

中图分类号: 


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