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鈦合金激光沉積制造熱累積與熔池形貌演化
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1沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,1沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,1沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,1沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,1沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室

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TG146.2

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國(guó)家自然科學(xué)(51505301,51375316)；遼寧省自然科學(xué)(2015020118)；國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFB1100504)


Correlations of thermal accumulation and melt pool geometry during Laser Deposition Titanium Alloy Manufacturing
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1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University

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    摘要:

    為了研究激光沉積制造過(guò)程熱累積對(duì)熔池形貌的影響,利用有限元軟件對(duì)單道多層激光沉積制造TA15鈦合金過(guò)程三維溫度場(chǎng)進(jìn)行數(shù)值模擬,得到不同沉積層上的節(jié)點(diǎn)熱循環(huán)特性、熔池溫度分布規(guī)律以及熔池形貌變化,結(jié)果表明,沉積過(guò)程存在著熱累積現(xiàn)象會(huì)使熔池面積逐漸變大。并通過(guò)對(duì)激光沉積過(guò)程熔池進(jìn)行實(shí)時(shí)監(jiān)測(cè)的試驗(yàn)對(duì)模擬進(jìn)行了驗(yàn)證,結(jié)果顯示,熱累積直接影響沉積層上熔池的寬度以及傾斜角度,且自一定層數(shù)之后,熔池溫度和熔池寬度逐漸趨于穩(wěn)定。實(shí)驗(yàn)結(jié)果和模擬結(jié)果吻合較好。

    Abstract:

    In order to study the effect of thermal accumulation of Laser deposition manufacturing (LDM) process on melt pool geometry. A three-dimensional(3D) multi-layer model for LDMed TA15 titanium alloy was developed to discover thermal cycle characteristics, temperature distribution of melt pool and melt pool geometry. Results showed that melt pools width increase gradually with the increase of deposition layer because of thermal accumulation. The numerical results were validated by experimental-measured values collected by in-situ monitoring techniques. Thermal accumulation is strongly correlated to melt pool width and melt pool inclination, however, melt pool temperature and width gradually become relatively stableSafter a certain number of layers. The experimental data and model prediction show a good agreement.

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欽蘭云,徐麗麗,楊光,劉奇,王維.鈦合金激光沉積制造熱累積與熔池形貌演化[J].稀有金屬材料與工程,2017,46(9):2645~2650.[Qin Lanyun, Xu Lili, Yang Guang, Liu Qi, Wang Wei. Correlations of thermal accumulation and melt pool geometry during Laser Deposition Titanium Alloy Manufacturing[J]. Rare Metal Materials and Engineering,2017,46(9):2645~2650.]
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  • 收稿日期:2016-12-14
  • 最后修改日期:2017-02-06
  • 錄用日期:2017-02-20
  • 在線發(fā)布日期: 2017-11-29
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