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純鋯中間層擴(kuò)散連接TC4鈦合金的接頭組織與力學(xué)性能
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哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國(guó)家重點(diǎn)實(shí)驗(yàn)室,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國(guó)家重點(diǎn)實(shí)驗(yàn)室,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國(guó)家重點(diǎn)實(shí)驗(yàn)室,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國(guó)家重點(diǎn)實(shí)驗(yàn)室,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國(guó)家重點(diǎn)實(shí)驗(yàn)室

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TG146.4

基金項(xiàng)目:

國(guó)家自然科學(xué)基金資助(51275133, 51321061)


Microstructure and Mechanical Properties of Diffusion Bonded Joint of TC4 Alloy Using Zr Interlayer
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State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology

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    摘要:

    采用純Zr中間層實(shí)現(xiàn)了TC4鈦合金的擴(kuò)散連接。通過(guò)掃描電鏡(SEM)、能譜分析(EDS)、X射線(xiàn)衍射(XRD)等方法分析了接頭界面的微觀(guān)組織結(jié)構(gòu),研究了擴(kuò)散連接工藝參數(shù)對(duì)接頭界面組織及力學(xué)性能的影響規(guī)律。結(jié)果表明,接頭界面處生成了成分均勻連續(xù)的鈦鋯固溶體擴(kuò)散層,同時(shí)擴(kuò)散層中含有大量板條狀的α′-Ti(鈦馬氏體)相；隨著連接溫度的升高和保溫時(shí)間的延長(zhǎng),擴(kuò)散層的厚度逐漸增加,接頭室溫抗剪強(qiáng)度呈現(xiàn)出先升高后降低的趨勢(shì)；當(dāng)連接溫度800℃、保溫時(shí)間40min、連接壓力5MPa時(shí),接頭室溫抗剪強(qiáng)度最高,達(dá)到190MPa。

    Abstract:

    Reliable diffusion bonding of TC4 alloy was achieved using Zr interlayer. The interfacial microstructure was characterized by scanning electron microscopy(SEM), energy dispersive spectrum analysis(EDS) and X-ray diffraction(XRD). Effects of joining parameters on the microsturcture and mechanical propertie s of the joints were investigated. The results indicated that (Ti,Zr) diffusion layer with uniform components transition was formed at the interface of the joint, in which consisted of a large amount of lath-like α′-Ti(titanium martensite). With the increase of bonding temperature and holding time, the thickness of the diffusion layer increased, and the shear strength of the joint increased until the maximum shear strength was reached and then decreased. The maximum shear strength was 190MPa when the joint was bonded at 800℃ for 40min under 5MPa.

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王東,曹健,代翔宇,亓鈞雷,馮吉才.純鋯中間層擴(kuò)散連接TC4鈦合金的接頭組織與力學(xué)性能[J].稀有金屬材料與工程,2018,47(2):677~681.[Wang Dong, Cao Jian, Dai Xiangyu, Qi Junlei, Feng Jicai. Microstructure and Mechanical Properties of Diffusion Bonded Joint of TC4 Alloy Using Zr Interlayer[J]. Rare Metal Materials and Engineering,2018,47(2):677~681.]
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歷史
  • 收稿日期:2015-12-22
  • 最后修改日期:2016-02-09
  • 錄用日期:2016-03-29
  • 在線(xiàn)發(fā)布日期: 2018-03-15
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