烧结温度对(Ti,W,Mo,Nb)(C,N)-(Co,Ni)金属陶瓷组织结构和性能的影响  

Effect of Sintering Temperature on Microstructure and Machining Performance of(Ti,W, Mo,Nb)(C, N)-(Co,Ni)Cermets

作　　者：项忠楠[1] 李战江 黄水根 常发 戴品强[1,2,3] Xiang Zhongnan;Li Zhanjiang;Huang Shuigen;Chang Fa;Dai Pinqiang(College of Materials Science and Engineering,Fuzhou University,Fuzhou 350116,China;College of Materials Science and Engineering,Fujian University of Technology,Fuzhou 350118,China;Fujian Provincial Key Laboratory of New Material Preparation and Forming Technology,Fuzhou 350118,China;Department of Materials Engineering,KU Leuven,Brussels 1000,Belgium)

机构地区：[1]福州大学材料科学与工程学院,福建福州350116 [2]福建工程学院材料科学与工程学院,福建福州350118 [3]福建省新材料制备与成形技术重点实验室,福建福州350118 [4]鲁汶大学材料工程系,比利时布鲁塞尔1000

出　　处：《稀有金属材料与工程》2021年第4期1179-1186,共8页Rare Metal Materials and Engineering

基　　金：University-Industry Cooperation Project of Fujian Province(2019H6022)。

摘　　要：以(Ti,W,Mo,Nb)(C,N)-(Co,Ni)基金属陶瓷材料为研究对象,研究烧结温度对金属陶瓷的成分、微观组织和力学性能的影响,初步探讨成分、微观组织与材料强度的关系。结果表明:烧结温度对(Ti,W,Mo,Nb)(C,N)-(Co,Ni)基金属陶瓷组织特征有显著的影响;合金的总碳含量随着烧结温度的提高而降低,当烧结温度达到1490℃时,合金总碳的急剧降低,导致合金组织中出现脱碳相(η相),从而使得合金的硬度(HV_(30))、断裂韧性(K_(IC))和抗弯强度(TRS)降低;1470℃烧结温度下,(Ti,W,Mo,Nb)(C,N)-(Co,Ni)基金属陶瓷合金的HV_(30)、K_(IC)和TRS的匹配最佳,在实际应用工况下的综合切削性能最优。Dense Co-and Ni-bonded Ti(C_(0.6)N_(0.4)) matrix cermets with secondary carbides, i.e., WC, Mo2C, and Nb C, were prepared by liquid phase sintering in vacuum for 60 min at temperatures ranging from 1410 to 1490 ℃. The detailed microstructural and phase analysis was performed by scanning electron microscopy, electron probe microanalysis, and X-ray diffraction. The effect of sintering temperature on the microstructure, mechanical properties, and machining performance of cermets was investigated. The results show that sintering temperature has a significant impact on the microstructural characteristics of(Ti, W, Mo, Nb)(C, N)-(Co, Ni) cermets.The total carbon content of cermets decreases with increasing the sintering temperature and a carbon-deficient phase(M_(6)C) is observed in the cermet sintered at 1490 ℃. The cermets sintered at temperatures of up to 1470 ℃ are composed of an fcc solid solution metal binder and two types of core-rim structured grains, i.e., cubic carbide solution and cubic Ti(C, N) solution phases. The best machining performance on continuous/interrupted turning is found in the cermet sintered at 1470 ℃ because of an optimum combination of hardness and transverse rupture strength.

关 键 词：金属陶瓷 烧结温度 显微组织 硬度 机加工 

分 类 号：TG148[一般工业技术—材料科学与工程]