张群莉,张杰,李栋,童文华,Liu Rong,宋立军,姚建华.不同时效温度下激光增材再制造IN718合金层的组织与性能研究[J].稀有金属材料与工程,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.]
不同时效温度下激光增材再制造IN718合金层的组织与性能研究
投稿时间:2019-10-18  修订日期:2019-12-29
中文关键词:  时效处理  激光增材再制造  IN718  组织  力学性能  
基金项目:国家重点研发计划项目(2017YFB1103600),浙江省重点研发计划联合技术研发与示范推广项目(2019C04004),省属高校基本科研业务费项目(RF-C2019003)
中文摘要:
      研究了不同时效处理对激光增材再制造IN718合金组织及性能的影响。研究表明,时效处理不能改变激光增材再制造IN718合金的外延生长组织特征,但在微观上能够影响Laves在枝晶间的含量和形态。在不同时效温度条件下,随着时效时间的增加,γ 相逐渐长大并在保温一定时间后发生γ 相到δ相的转变,且时效温度越高,所需时间越短。此外,不同时效温度下处理后的修复区显微硬度和抗拉强度随时间均表现出先增后减的趋势。720 ℃条件下,显微硬度在时效16 h时出现峰值410 HV0.2,而760 ℃和800℃条件下时效4 h时出现峰值,分别为385 HV0.2和361 HV0.2。720 ℃、760℃及800 ℃时效条件下不同时效时间对应的抗拉强度最大值分别1153 MPa,1090 MPa和1026 MPa。
Microstructure and Properties of Laser Additive Remanufactured IN718 Alloy Treated with Different Aging Temperatures
英文关键词:aging treatment  laser additive remanufacturing  IN718  microsturcture  tensile property
英文摘要:
      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.
作者单位E-mail
张群莉 浙江工业大学激光先进制造研究院 zql@zjut.edu.cn 
张杰 浙江工业大学激光先进制造研究院 zhangjie-zjut@foxmail.com 
李栋 浙江工业大学激光先进制造研究院  
童文华 浙江工业大学激光先进制造研究院  
Liu Rong 卡尔顿大学机械与航空航天工程系,加拿大 渥太华 KIS B  
宋立军 湖南大学  
姚建华 浙江工业大学激光先进制造研究院 laser@zjut.edu.cn 
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