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時效處理對Cu-3Ti-3Ni合金組織與性能的影響
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西安理工大學(xué)材料科學(xué)與工程學(xué)院,西安理工大學(xué) 材料科學(xué)與工程學(xué)院,迪肯大學(xué)前沿材料研究院,西安理工大學(xué)材料科學(xué)與工程學(xué)院,西安理工大學(xué)材料科學(xué)與工程學(xué)院

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國家自然科學(xué)基金項目（面上項目，重點(diǎn)項目，重大項目）


Microstructural evolution and properties of the aged Cu-3Ti-3Ni alloy
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School of Materials Science and Engineering,Xi’an University of Technology,Xi’an,,Institute for Frontier Materials, Waurn Ponds, Deakin University,School of Materials Science and Engineering,Xi’an University of Technology,Xi’an,School of Materials Science and Engineering,Xi’an University of Technology,Xi’an

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    摘要:

    本文研究了時效處理對Cu-3Ti-3Ni合金組織與性能的影響。采用X射線衍射儀(XRD)、掃描電子顯微鏡(SEM)及透射電子顯微鏡(TEM)對Cu-3Ti-3Ni合金的組織和析出相進(jìn)行了表征，并對其硬度、導(dǎo)電率和彈性模量進(jìn)行了測試。結(jié)果表明：時效處理后析出Ni3Ti及 β'-Cu4Ti相。隨著時效時間的延長，部分合金元素回溶于Cu基體，連續(xù)的亞穩(wěn)定β'-Cu4Ti相向不連續(xù)的穩(wěn)定Cu3Ti相轉(zhuǎn)變。Ni3Ti相及β'-Cu4Ti相的析出減少了Ti原子的固溶，導(dǎo)致導(dǎo)電率升高。經(jīng)過合適的時效處理，Cu-3Ti-3Ni合金中的Ni3Ti相及連續(xù)的亞穩(wěn)定β'-Cu4Ti相析出完全，導(dǎo)致硬度升高，但時效處理對合金彈性模量影響不大。在本實(shí)驗(yàn)范圍內(nèi)，Cu-3Ti-3Ni合金的最佳時效處理工藝是 300°C時效2 h后爐冷，隨后450 °C時效7 h爐冷。Cu-3Ti-3Ni合金的硬度、導(dǎo)電率及彈性模量分別是183 HV、31.34 % IACS (國際退火銅標(biāo)準(zhǔn))及148.62 GPa。

    Abstract:

    The effect of aging treatment on the microstructure and properties of Cu-3Ti-3Ni alloy was studied. The microstructure and precipitated phase were characterized by X-ray diffractometer, scanning electron microscope and transmission electron microscope, and the hardness, electrical conductivity and elastic modulus were measured as well. The results show that a number of Ni3Ti and β'-Cu4Ti phase precipitate from the Cu matrix after aging treatment. With increase of secondary aging time, the partial alloying elements dissolve into the Cu matrix and the metastable Cu4Ti phase transform into incoherent equilibrium Cu3Ti phase. The enhanced electrical conductivity is ascribed to the decrease of Ti solubility in the Cu matrix by the formation of the Ni3Ti and β'-Cu4Ti precipitates. After an appropriate aging treatment of Cu-3Ti-3Ni alloy, the Ni3Ti and coherent metastable β'-Cu4Ti phase precipitate completely, giving rise to the increase of hardness. Aging treatment has no obvious effect on the elastic modulus of Cu-3Ti-3Ni alloy. In the range of the experiments, the optimal two-step aging treatment for Cu-3Ti-3Ni alloy is at 300°C for 2 h and 450 °C for 7 h. The hardness, electrical conductivity and elastic modulus are 183 HV, 31.34 %IACS (International Annealed Copper Standard) and 148.62 GPa, respectively.

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劉佳,王獻(xiàn)輝,郭婷婷,鄒軍濤,楊曉紅.時效處理對Cu-3Ti-3Ni合金組織與性能的影響[J].稀有金屬材料與工程,2016,45(5):1162~1167.[Jia Liu, Xianhui Wang, Tingting Guo, Juntao Zou, Xiaohong Yang. Microstructural evolution and properties of the aged Cu-3Ti-3Ni alloy[J]. Rare Metal Materials and Engineering,2016,45(5):1162~1167.]
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  • 收稿日期:2014-12-17
  • 最后修改日期:2015-01-16
  • 錄用日期:2015-02-06
  • 在線發(fā)布日期: 2016-06-02
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