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高溫形變熱處理對Ti-1300合金組織及硬度的影響
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陜西省重點科技創(chuàng)新團隊計劃（2012KCT-23）；陜西省科技統(tǒng)籌創(chuàng)新工程項目（2012KCTG04-04）


Effect of High Temperature Thermomechanical Treatment on Microstructure and Hardness of Ti-1300 Titanium Alloy
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    摘要:

    采用光學(xué)顯微鏡、掃描電子顯微鏡、Gleeble-3800熱模擬試驗機以及IMVS-1000JMT2數(shù)顯維氏顯微硬度儀研究了等溫變形條件下形變熱處理對Ti-1300合金組織及硬度性能的影響。結(jié)果表明：高溫形變熱處理可以明顯的細化Ti-1300合金的顯微組織，并在一定程度上提高合金的力學(xué)性能。熱軋態(tài)合金的組織中粗大塊狀和長條狀α相經(jīng)高溫壓縮變形后具有明顯的等軸均勻化趨勢，然后分別經(jīng)過淬火時效和固溶時效處理后合金的組織主要由板條狀初生α相，針狀次生α相以及β相組成，初生α相和次生α相主要分布于晶界和β基體上。與淬火時效態(tài)相比，固溶時效態(tài)合金的硬度隨初生α相板條厚度和含量的增加而降低，最后對影響的機理進行探討和分析。

    Abstract:

    Effects of high temperature thermomechanical treatment on microstructure and hardness of Ti-1300 alloy under isothermal deformation condition were investigated by means of optical microscope (OM), scanning electron microscopy (SEM), thermal simulation testing machine (Gleeble-3800) and Vickers hardness tester (IMVS-1000JMT2). The results show that high temperature thermomechanical treatment can markedly refine the microstructure and improve the mechanical property of Ti-1300 alloy. Microstructure observation of the hot rolled and hot compressed samples indicates that the tendency of the coarse and elongated grains recovering to equiaxed shape is more obvious, and the microstructure of Ti-1300 alloy after quenching plus aging and solution plus aging treatment is composed of a mixture of primary α phase (αp), secondary α phase (αs) and β phase. The αp phase is mainly distributed in the grain boundary, but the αs phase is mainly in the β matrix after aging treatment. The hardness of the alloy under quenching plus aging is increased due to the growth of αs phase and the remarkable refining of αp phase in width.

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盧金文,葛 鵬,趙永慶,李 磊,李 倩,周 偉.高溫形變熱處理對Ti-1300合金組織及硬度的影響[J].稀有金屬材料與工程,2015,44(3):676~680.[Lu Jinwen, Ge Peng, Zhao Yongqing, Li Lei, Li Qian, Zhou Wei. Effect of High Temperature Thermomechanical Treatment on Microstructure and Hardness of Ti-1300 Titanium Alloy[J]. Rare Metal Materials and Engineering,2015,44(3):676~680.]
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  • 收稿日期:2014-03-15
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  • 在線發(fā)布日期: 2015-05-29
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