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旋轉磁場對激光熔凝鈦合金熔池的影響研究
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沈陽航空航天大學 航空制造工藝數字化國防重點學科實驗室,沈陽航空航天大學 航空制造工藝數字化國防重點學科實驗室,沈陽航空航天大學 航空制造工藝數字化國防重點學科實驗室,沈陽航空航天大學 航空制造工藝數字化國防重點學科實驗室

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國家自然基金(51375316,51305280)、航空(2014ZE54020)、遼寧省教育廳優(yōu)秀人才項目(LJQ2014020)


Influence of a Rotating Magnetic Field on Laser Melting Titanium Alloy Melt Pool
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Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Pross,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Pross,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Pross,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Pross,Shenyang Aerospace University

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    摘要:

    本文運用有限元方法對不同頻率下電磁攪拌輔助裝置中心處磁場強度以及熔池電磁力進行了模擬分析,并研究了旋轉磁場對熔池電磁力和熔池溫度分布及流場影響,結果表明當電流頻率增大時,熔池中電磁力首先有緩慢減小趨勢,同時功率損耗迅速增大,當頻率繼續(xù)增大時,電磁力逐漸增大,此時功率損耗基本趨于穩(wěn)定；在激勵電流變化的一個周期內,攪拌裝置中磁場強度也發(fā)生周期性變化。在施加旋轉磁場條件下,熔池整體溫度有所降低,溫度梯度減小,熔池內形成圍繞熔池做周向流動的環(huán)流,流速分布均勻。

    Abstract:

    The magnetic field intensity of central electromagnetic stirring equipment and the melt pool’s electromagnetic force were simulated, and the influence of rotating magnetic field on melt pool electromagnetic force,the flow field and temperature distribution of the meltpool was analyzed by finite element method.The results showed that the electricity magnetic in melt pool decreased slowly at first when increasing the current frequency, and the power loss increased rapidly at the same time,when frequency continued to rise, the electromagnetic force increased gradually and the power loss became stable at this time.And the magnetic field strength of electromagnetic stirrer changed periodically in one exciting current cycle.Under the condition of rotating magnetic field,the temperature and the temperature gradient of melt pooldecreased, and circulation in melt pool circumferential direction formed and its velocity distribution was uniform.

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楊光,薛雄,欽蘭云,王維.旋轉磁場對激光熔凝鈦合金熔池的影響研究[J].稀有金屬材料與工程,2016,45(7):1804~1810.[Yang Guang, Xue Xiong, Qin Lanyun, Wang Wei. Influence of a Rotating Magnetic Field on Laser Melting Titanium Alloy Melt Pool[J]. Rare Metal Materials and Engineering,2016,45(7):1804~1810.]
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  • 收稿日期:2015-07-16
  • 最后修改日期:2015-12-16
  • 錄用日期:2016-01-14
  • 在線發(fā)布日期: 2016-10-09
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