0.2,而760 ℃和800℃條件下時(shí)效4 h時(shí)出現(xiàn)峰值,分別為385 HV0.2和361 HV0.2。720 ℃、760℃及800 ℃時(shí)效條件下不同時(shí)效時(shí)間對(duì)應(yīng)的抗拉強(qiáng)度最大值分別1153 MPa,1090 MPa和1026 MPa。"/>

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不同時(shí)效溫度下激光增材再制造IN718合金層的組織與性能研究
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作者單位:

1.浙江工業(yè)大學(xué)激光先進(jìn)制造研究院;2.卡爾頓大學(xué)機(jī)械與航空航天工程系,加拿大 渥太華 KIS B;3.湖南大學(xué)

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國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2017YFB1103600),浙江省重點(diǎn)研發(fā)計(jì)劃聯(lián)合技術(shù)研發(fā)與示范推廣項(xiàng)目(2019C04004),省屬高?；究蒲袠I(yè)務(wù)費(fèi)項(xiàng)目(RF-C2019003)


Microstructure and Properties of Laser Additive Remanufactured IN718 Alloy Treated with Different Aging Temperatures
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Affiliation:

1.Institute of Laser Advanced Manufacturing,Zhejiang University of Technology;2.Department of Mechanical and Aerospace Engineering,Carleton University,Ottawa Ontario,KIS B,Canada

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    摘要:

    研究了不同時(shí)效處理對(duì)激光增材再制造IN718合金組織及性能的影響。研究表明,時(shí)效處理不能改變激光增材再制造IN718合金的外延生長(zhǎng)組織特征,但在微觀上能夠影響Laves在枝晶間的含量和形態(tài)。在不同時(shí)效溫度條件下,隨著時(shí)效時(shí)間的增加,γ 相逐漸長(zhǎng)大并在保溫一定時(shí)間后發(fā)生γ 相到δ相的轉(zhuǎn)變,且時(shí)效溫度越高,所需時(shí)間越短。此外,不同時(shí)效溫度下處理后的修復(fù)區(qū)顯微硬度和抗拉強(qiáng)度隨時(shí)間均表現(xiàn)出先增后減的趨勢(shì)。720 ℃條件下,顯微硬度在時(shí)效16 h時(shí)出現(xiàn)峰值410 HV0.2,而760 ℃和800℃條件下時(shí)效4 h時(shí)出現(xiàn)峰值,分別為385 HV0.2和361 HV0.2。720 ℃、760℃及800 ℃時(shí)效條件下不同時(shí)效時(shí)間對(duì)應(yīng)的抗拉強(qiáng)度最大值分別1153 MPa,1090 MPa和1026 MPa。

    Abstract:

    The effects of aging treatment on the microstructure and properties of laser additive remanufactured IN718 alloy were studied. The results show that the aging treatment can not change the epitaxy growth structure of laser additive remanufactured IN718 alloy, but it will affect the content and morphology of Laves phase. With increase of the aging time, γ phase gradually grows up and changes to δ after holding for a certain time at different aging temperatures. The higher aging temperature, the shorter the time required. In addition, the microhardness and tensile strength of the repaired zone increase firstly and then decrease with holding time at different aging temperatures. The peak value of microhardness is 410 HV0.2 at 720 ℃ for 16 h, 385 HV0.2 and 361 HV0.2 at 760 ℃ and 800 ℃ for 4 h, respectively. The maximum values of tensile strength corresponding to different aging time at 720 ℃, 760 ℃ and 800 ℃ are 1153 MPa, 1090 MPa and 1026 MPa, respectively.

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張群莉,張杰,李棟,童文華,Liu Rong,宋立軍,姚建華.不同時(shí)效溫度下激光增材再制造IN718合金層的組織與性能研究[J].稀有金屬材料與工程,2020,49(5):1785~1792.[Zhang Qunli, Zhang Jie, Li Dong, Tong Wenhua, Rong Liu, Song Lijun, Yao Jianhua. Microstructure and Properties of Laser Additive Remanufactured IN718 Alloy Treated with Different Aging Temperatures[J]. Rare Metal Materials and Engineering,2020,49(5):1785~1792.]
DOI：10.12442/j. issn.1002-185X.20190861

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  • 收稿日期:2019-10-18
  • 最后修改日期:2019-12-29
  • 錄用日期:2020-01-03
  • 在線發(fā)布日期: 2020-06-05
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