检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:唐函遥 朱红梅[1] 邱长军[1] 申龙章[1] Tang Hanyao;Zhu Hongmei;Qiu Changjun;Shen Longzhang(Hunan Provincial Key Laboratory of Super-fast Micro-nano and Laser Advanced Manufacturing Technology,School of Mechanical Engineering,University of South China,Hengyang 421001,China)
机构地区:[1]南华大学机械工程学院超快激光技术与激光先进制造湖南省重点实验室,湖南衡阳421001
出 处:《稀有金属材料与工程》2023年第4期1361-1368,共8页Rare Metal Materials and Engineering
基 金:中央军委装备发展部装备预研基金(61400040204)。
摘 要:激光制造高性能GH4169镍基合金通常在密闭环境下进行,导致部件加工尺寸受限和成本增加。为了拓宽激光增材制造和再制造GH4169合金的应用,本研究尝试在大气环境不同气氛(Ar、N_(2))下进行激光修复实验。结果表明,在大气环境Ar气氛下,修复层主要由γ相和长链状Laves相组成,呈典型的柱状晶组织,其抗拉强度、屈服强度和延伸率分别为874 MPa、621 MPa和23.1%。在大气环境N_(2)气氛下,由于其热导率更高,熔池冷却速率更快,修复层主要由γ相、尺寸与体积分数更小的颗粒状Laves相以及(Ti,Nb)N颗粒相组成,呈细化的枝晶组织,其抗拉强度、屈服强度和延伸率分别为935 MPa、649 MPa和24.9%。由于细晶强化和第二相析出强化的共同作用,在大气环境N_(2)气氛下可成功实现对GH4169合金低成本、高效率的激光修复。The laser manufactured high-performance GH4169 Ni-based alloys were generally prepared in a closed environment,resulting in limited component dimension and increased fabrication cost.In order to broaden the application of laser additive manufacturing and remanufacturing GH4169 alloy,this work was attempted under different atmospheres(Ar,N_(2))in atmospheric environment.The results indicate that the laser-repaired layer under Ar atmosphere is mainly composed ofγphase and long-chain shaped Laves phase,with a typical columnar crystal structure.The tensile strength,yield strength and elongation are 874 MPa,621 MPa and 23.1%,respectively.In contrast,due to its higher thermal conductivity and faster molten pool cooling rate under N_(2) atmosphere,the laser-repaired layer is mainly composed ofγphase,granular Laves phase with smaller size and volume fraction,and granular(Ti,Nb)N phase.The dendritic structure is refined,with tensile strength,yield strength and elongation of 935 MPa,649 MPa and 24.9%,respectively.Under the combined effects of fine grain strengthening and second-phase precipitation strengthening,the laser repairing of GH4169 alloy can be achieved successfully under N_(2) atmosphere at low cost and high efficiency.
分 类 号:TG174.442[金属学及工艺—金属表面处理]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.30