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離心鑄造鈦合金件的力學(xué)性能變化規(guī)律
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國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(50434030)


Mechanical Properties of Centrifugal Casting Titanium Alloys
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    摘要:

    采用水冷銅坩堝真空感應(yīng)凝殼熔煉設(shè)備，制備離心力場(chǎng)下不同旋轉(zhuǎn)時(shí)間的鈦合金鑄件，研究離心半徑、補(bǔ)縮冒口以及旋轉(zhuǎn)時(shí)間對(duì)鈦合金鑄件的抗拉強(qiáng)度、屈服強(qiáng)度、延伸率和顯微硬度的影響規(guī)律。結(jié)果表明：離心旋轉(zhuǎn)時(shí)間相同時(shí)，鈦合金鑄件的力學(xué)性能隨著離心半徑的增加而改善，有補(bǔ)縮冒口時(shí)可以獲得力學(xué)性能優(yōu)異的鑄件。旋轉(zhuǎn)時(shí)間15與1.5 min相比，獲得的鑄件力學(xué)性能更優(yōu)異，這是由于鑄件顯微組織細(xì)化，導(dǎo)致晶界強(qiáng)化，位錯(cuò)滑移的阻力增大所造成的。

    Abstract:

    Titanium alloy castings are obtained with different rotation time in the ISM apparatus. The effects of rotation radius, riser and rotation time on the tensile strength, yield strength, specific elongation, and microhardness are investigated. The results show that the mechanical properties increase with the increase of rotation radius for the same rotation time. Excellent mechanical properties can be obtained for the casting with riser. As the rotation time is increased from 1.5 min to 15 min, the mechanical properties are greatly improved due to the finer microstructure and the strengthened grain boundary and then resulting in the increase of the resistance to dislocation slipping.

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隋艷偉,李邦盛,劉愛輝,郭景杰,傅恒志.離心鑄造鈦合金件的力學(xué)性能變化規(guī)律[J].稀有金屬材料與工程,2009,38(2):251~254.[Sui Yanwei, Li Bangsheng, Liu Aihui, Guo Jingjie, Fu Hengzhi. Mechanical Properties of Centrifugal Casting Titanium Alloys[J]. Rare Metal Materials and Engineering,2009,38(2):251~254.]
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  • 收稿日期:2008-01-23
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