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熱處理對(duì)激光立體成形新型Ti-6Al-6Mo合金顯微組織和硬度的影響
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作者單位:

1.長(zhǎng)安大學(xué)材料科學(xué)與工程學(xué)院;2.西北工業(yè)大學(xué)凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室

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基金項(xiàng)目:

國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(No. 2016YFB0700301, No. 2016YFB1100103), 中國(guó)博士后科學(xué)基金項(xiàng)目（No. 2016M592731）


Effect of heat treatment on the microstructure and hardness of a novel Ti-6Al-6Mo alloy formed by laser solid forming
Author:
Affiliation:

1.School of Material Science and Engineering,Chang’an University,Xi’an;2.State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an

Fund Project:

The National Key Research and Development Program of China (No. 2016YFB0700301, No. 2016YFB1100103), China Postdoctoral Science Foundation (No. 2016M592731)

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    摘要:

    以混合元素粉末為原料,采用激光立體成形(Laser solid forming, LSF)技術(shù)制備新型Ti-6Al-6Mo合金。研究了沉積態(tài)試樣的顯微組織以及固溶時(shí)效處理對(duì)合金顯微組織形成及硬度的影響。結(jié)果表明,本研究所采用的熱處理制度對(duì)原始β晶粒形貌沒有顯著的影響；固溶溫度、固溶時(shí)間和固溶后的冷卻方式對(duì)原始β晶粒中α相的形貌和尺寸以及LSF Ti-6Al-6Mo合金的顯微硬度均有顯著影響。當(dāng)時(shí)效時(shí)間超過4小時(shí)后,隨著時(shí)效時(shí)間的延長(zhǎng),合金的顯微組織和顯微硬度均未產(chǎn)生明顯變化?；诓煌瑹崽幚?xiàng)l件下LSF Ti-6Al-6Mo合金中初生α板條和次生α板條的析出機(jī)制及其對(duì)β基體的強(qiáng)化作用分析,揭示了熱處理對(duì)LSF Ti-6Al-6Mo合金的顯微組織和顯微硬度的影響機(jī)理。

    Abstract:

    A novel Ti-6Al-6Mo alloy sample was fabricated by laser solid forming (LSF) using blended elemental powders as raw material. The microstructure of as-deposited sample and the effects of solution and aging treatment on the microstructure and microhardness of LSF Ti-6Al-6Mo alloy were discussed. The results showed that the heat treatment conducted in this study has no significant effect on the morphologies of prior b grains of the alloy. The solution temperature, solution time, and the cooling method after solution treatment have a significant effect on the morphology and size of the α phase in the prior β grains and the microhardness of the LSF Ti-6Al-6Mo alloy. When the aging time exceeds 4 hours, the microstructure and microhardness of the alloy change little with increasing aging time. Based on the analysis of precipitation and strengthening effect of the primary α laths and secondary α laths on the b matrix in LSF Ti-6Al-6Mo alloy under different heat treatment conditions, the influence mechanism of heat treatment on the microstructure and microhardness of LSF Ti-6Al-6Mo was revealed.

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引用本文

張鳳英,胡騰騰,譚華,邱瑩,梅敏,楊海歐.熱處理對(duì)激光立體成形新型Ti-6Al-6Mo合金顯微組織和硬度的影響[J].稀有金屬材料與工程,2019,48(2):357~365.[Zhang Fengying, Hu Tengteng, Tan Hua, Qiu Ying, Mei Min, Yang Haiou. Effect of heat treatment on the microstructure and hardness of a novel Ti-6Al-6Mo alloy formed by laser solid forming[J]. Rare Metal Materials and Engineering,2019,48(2):357~365.]
DOI：10.12442/j. issn.1002-185X.20180526

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  • 收稿日期:2018-05-22
  • 最后修改日期:2018-06-21
  • 錄用日期:2018-06-27
  • 在線發(fā)布日期: 2019-03-15
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