摘要: |
研究了钛铝基合金熔模精铸氧化物陶瓷型壳的制备工艺,研究表明,粘结剂主要是在焙烧过程中通过晶相转变生成Si-O键来提高型壳强度的。采用硅溶胶和硅酸乙酯交替作为背层粘结剂可以改善氧化锆陶瓷型壳的强度,同时能够具有良好的退让性。另外,通过实验确定采用硅溶胶和硅酸乙酯交替作为背层粘结剂制备的氧化锆陶瓷型壳的最佳焙烧工艺是在1000℃保温1h。 |
关键词: 熔模精铸;型壳;粘结剂;退让性 |
基金项目: |
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Technology Research on the Oxide Ceramic Mould forInvestment Casting of TiAl-based Alloys |
Sun Minjie1, Chen Yuyong2, Li Baohui1, Zhao Ertuan2
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1. Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600;2. Harbin Institute of Technology, Harbin 150001
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Abstract: |
In this paper, the oxide ceramic mould for investment casting TiAl-based alloys has been investigated. Studies have shown that the Si-O bond generated by the phase transformation improved strength of mould in the roasting process of the binder. Alternating with silica sol and ethyl silicate binder as the binder using on the back layer of zirconium oxide ceramic can improve the mould strength, while providing a good deformability of the mould. Also by experiments, the best route of using alternating silica and ethyl silicate binder prepared as a background layer of zirconium oxide ceramic shell is roasting for one hour in 1000℃. |
Key words: investment casting;mould;binder;deformability |