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Zr元素對Cu-4Ti合金調(diào)幅分解與非連續(xù)沉淀的影響
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蘇州有色金屬研究院有限公司

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TG146.1 1；TG166.2

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中國鋁業(yè)公司科技發(fā)展基金（2006KJA07）


Effect of Zr addition on the spinodal decomposition and discontinuous precipitation of Cu-4Ti alloy
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(1 Suzhou Institute for Nonferrous Metals Co., Ltd

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    摘要:

    Cu-Ti合金熱處理過程中發(fā)生調(diào)幅分解而產(chǎn)生強(qiáng)烈的時(shí)效強(qiáng)化效應(yīng)，獲得較高的強(qiáng)度與硬度，但Cu-Ti合金極易過時(shí)效而使強(qiáng)度與硬度下降，需要添加改性元素。本文研究了Zr元素對Cu-4Ti合金調(diào)幅分解與非連續(xù)沉淀的影響,使用光學(xué)顯微及透射電鏡表征了合金固溶及熱處理過程的微觀組織，分析了Zr元素對調(diào)幅分解與非連續(xù)沉淀組織形貌的影響。通過力學(xué)及電學(xué)性能的變化，分析了Zr元素對合金性能的影響。結(jié)果表明：Zr元素阻礙Ti原子的擴(kuò)散，能顯著延緩Cu-4Ti合金調(diào)幅分解的過程，抑制非連續(xù)沉淀的發(fā)生，提高Cu-4Ti-0.1Zr合金在峰值時(shí)效（450℃?h）時(shí)的綜合性能，對電導(dǎo)率的影響小，其抗拉強(qiáng)度為1155MPa，維氏硬度為330，電導(dǎo)率是15.4 IACS%。

    Abstract:

    The Cu-Ti series alloys, strengthen by the spinodal decomposition during the heat treatment, are easy of losing strength and hardness after over aging, which need to add elements to optimize them. The effect of 0.1wt% zirconium addition on the spinodal decomposition and discontinuous precipitation of Cu-4Ti alloy has been studied. Microstructure was investigated by Optical Microscope (OM) and Transmission Electron Microscope (TEM). Mechanical properties and electrical conductivity (EC) were tested to show the properties of these alloys. The results show that spinodal decomposition process was retarded and discontinuous precipitation was suppressed by 0.1 wt% zirconium added to Cu-4Ti alloys, because of the hindering of zirconium to titanium’s diffusion. Zirconium elevated the properties of this alloy on peak aging at 450℃ for 7h. The zirconium has little influence on electrical conductivity of the Cu-4Ti-0.1Zr alloy. The tensile strength was 1155 MPa, microhardness was 330 and the electrical conductivity was 15.4%IACS.

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向朝建. Zr元素對Cu-4Ti合金調(diào)幅分解與非連續(xù)沉淀的影響[J].稀有金屬材料與工程,2016,45(4):1024~1029.[xiangchaojian. Effect of Zr addition on the spinodal decomposition and discontinuous precipitation of Cu-4Ti alloy[J]. Rare Metal Materials and Engineering,2016,45(4):1024~1029.]
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  • 收稿日期:2014-05-05
  • 最后修改日期:2014-07-11
  • 錄用日期:2014-08-12
  • 在線發(fā)布日期: 2016-06-02
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