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93W-7Ni激光粉末床熔融增材制造研究
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西安交通大學(xué) 機(jī)械制造系統(tǒng)工程國家重點(diǎn)實(shí)驗(yàn)室

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科學(xué)挑戰(zhàn)專題(TZ2018006-0301-01)，江蘇省三維打印裝備與制造重點(diǎn)實(shí)驗(yàn)室開放課題（3DL202101）


Research on Laser Powder Bed Fusion Additive Manufactured 93W-7Ni alloy
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1.State Key Laboratory of Manufacturing System Engineering,Xi’an Jiaotong University,Xi’an 710049;2.China

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    摘要:

    以W顆粒和Ni顆粒預(yù)先混合的93W-7Ni粉體為原料，采用激光粉末床熔融（Laser powder bed fusion, LPBF）制備了鎢鎳合金試樣。研究了不同線能量密度的鎢鎳合金試樣的相對(duì)密度、顯微組織及顯微硬度。結(jié)果表明：鎢鎳合金試樣的缺陷主要為不規(guī)則孔隙，不存在明顯可見的裂紋缺陷，且提高線能量密度能夠明顯減少缺陷。當(dāng)線能量密度為1.5J/mm時(shí)，鎢鎳合金試樣相對(duì)密度達(dá)98.04%。LPBF制備的鎢鎳合金試樣的顯微組織主要由W單質(zhì)相和Ni-W基體相組成，并伴有大量細(xì)小的枝/顆粒狀鎢晶粒。試樣的顯微硬度高達(dá)529.83HV0.5，且基本不受線能量密度的影響。

    Abstract:

    The W-Ni alloy specimens were prepared by laser powder bed fusion (LPBF) using 93W-7Ni pre-mixed powder feedstock. The influence of different linear energy densities (LEDs) on relative density, microstructure and microhardness of LPBFed W-Ni alloy specimens. The results show that the defects of the W-Ni alloy specimens are mainly irregular pores with no obvious cracks and the irregular pores can be reduced by increasing the LED. The W-Ni alloy specimens with a maximum relative density of 98.04% can be prepared by using LED of 1.5J/mm. The microstructure of LPBFed W-Ni alloy specimens is mainly composed of W particles and Ni-W matrix phase, accompanied by a large number of fine dendritic/granular W grains. The LPBFed W-Ni specimens have high microhardness with a maximum of 529.83HV0.5, which was not significantly influenced by LED.

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李俊峰,魏正英,薛凌峰.93W-7Ni激光粉末床熔融增材制造研究[J].稀有金屬材料與工程,2023,52(8):2783~2790.[Li Junfeng, Wei Zhengying, Xue Lingfeng. Research on Laser Powder Bed Fusion Additive Manufactured 93W-7Ni alloy[J]. Rare Metal Materials and Engineering,2023,52(8):2783~2790.]
DOI：10.12442/j. issn.1002-185X.20220575

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  • 收稿日期:2022-07-10
  • 最后修改日期:2022-09-21
  • 錄用日期:2022-09-27
  • 在線發(fā)布日期: 2023-08-28
  • 出版日期: 2023-08-24