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激光立體成形Ti-25V-15Cr合金的阻燃性能研究
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長安大學(xué)材料科學(xué)與工程學(xué)院,長安大學(xué)材料科學(xué)與工程學(xué)院,長安大學(xué)材料科學(xué)與工程學(xué)院,長安大學(xué)材料科學(xué)與工程學(xué)院,長安大學(xué)材料科學(xué)與工程學(xué)院

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中圖分類號:

TG146.2+3

基金項(xiàng)目:

國家自然科學(xué)基金(No.51401033),國家重點(diǎn)研發(fā)計(jì)(No.2016YFB1100103,No.2016YFB0700301),陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(No.2016JQ5022),中國博士后科學(xué)基金(2016M592731)


Investigation on burn-resistant property of laser solid forming of Ti-25V-15Cr alloy
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School of Material Science and Engineering, Chang’an University, Xi’an 710064, P.R. China,,,,

Fund Project:

National Natural Science Foundation of China (No.51401033), National Key Research and Development Program of China (No.2016YFB0700301, No.2016YFB1100103), China Postdoctoral Science Foundation (No. 2016M592731) and Natural Science Basic Research Plan in Shaanxi Province of China (No.2016JQ5022).

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    摘要:

    本研究針對激光立體成形 Ti-25V-15Cr合金的阻燃性能展開,采用直流電弧激發(fā)燃燒法測試其阻燃性能并與鍛造Ti40合金進(jìn)行比較,在此基礎(chǔ)上,基于二者原始組織分析、燃燒產(chǎn)物的觀察與分析揭示其阻燃機(jī)理。結(jié)果表明,激光立體成形Ti-25V-15Cr合金的燃燒速率略低于鍛造Ti40合金。燃燒后各區(qū)域組織分析結(jié)果表明,激光立體成形Ti-25V-15Cr和鍛造Ti40合金燃燒產(chǎn)物區(qū)均由Ti的氧化物、V的氧化物以及基體組成,Ti-25V-15Cr燃燒產(chǎn)物區(qū)氧化物面積略小于鍛造Ti40合金,同時(shí)燃燒熱影響區(qū)的晶界和亞晶界處發(fā)現(xiàn)明顯的V、Cr元素的偏聚。激光立體成形Ti-25V-15Cr合金中局部枝晶組織以及亞晶粒的形成增加了微觀結(jié)構(gòu)的缺陷,在受熱條件下使得V、Cr元素的擴(kuò)散能力增強(qiáng),是其抗燃燒性能略優(yōu)于鍛造Ti40合金的原因。

    Abstract:

    In this study, the burn-resistant property of laser solid forming (LSF) of Ti-25V-15Cr alloy was studied, and compared with that of forging Ti40 alloy. The burn-resistant mechanism was disclosed by combining the analysis of the microstructure of the alloy and the combustion products. The results showed that the burning rate of Ti-25V-15Cr alloy is slightly lower than that of forging Ti40 alloy. The combustion products of Ti-25V-15Cr alloy and Ti40 alloy are mainly composed of a mixture of Ti oxide and V oxide, and the substrate. The area of the Oxide in the combustion product zone of LSF Ti-25V-15Cr is a little smaller than that of forging Ti40. Moreover, the distinct segregation of V and Cr in the grain boundary and subgrain boundary was found in LSF Ti-25V-15Cr alloy. The formation of the dendrites and subgrains in LSF Ti-25V-15Cr increases the micro-defect and leads to the better diffusion capacity of V and Cr, which is responsible for the better resistance to the burning of LSF Ti-25V-15Cr than that of forging Ti40.

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引用本文

張鳳英,梅敏,楊雪坤,邱瑩,胡騰騰.激光立體成形Ti-25V-15Cr合金的阻燃性能研究[J].稀有金屬材料與工程,2018,47(6):1771~1778.[Fengying Zhang, Min Mei, Xuekun Yang, Ying Qiu, Tengteng Hu. Investigation on burn-resistant property of laser solid forming of Ti-25V-15Cr alloy[J]. Rare Metal Materials and Engineering,2018,47(6):1771~1778.]
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  • 收稿日期:2017-09-03
  • 最后修改日期:2017-11-06
  • 錄用日期:2017-12-13
  • 在線發(fā)布日期: 2018-09-06
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