钛钒的量之比对(Ti,V)C基金属陶瓷显微组织和力学性能的影响

摘要

以TiC、VC、Co、Ni为原料,通过粉末冶金的方法制备了(Ti,V)C基金属陶瓷,结合XRD、SEM&EDS及力学性能测试研究了ndnv对(Ti,V)C基金属陶瓷显微组织和力学性能的影响以及(Ti,V)C基金属陶瓷烧结后的物相变化.结果表明:经高温烧结后TiC和VC固溶形成立方相(Ti,V)C.当nTiv从4增加到15.75时,(Ti,V)C基金属陶瓷的硬度变化波动较小,抗弯强度先增加后降低.当nTi v=7.35时,(Ti,V)C基金属陶瓷的显微组织得到细化,抗弯强度为1 237 MPa,维氏硬度为1 444 Nm2,综合力学性能较佳.%(Ti,V)C-based cermets were prepared with raw materials of TiC,VC,Co and Ni by powder metallurgy method.XRD,SEM&EDS analysis and mechanical properties tests were used to investigate the effect of nTiv on the microstructure and properties of the (Ti,V)C-based cermets.The phase transformation of the (Ti,V)C-based cermets after sintering was also investigated.The results show that TiC and VC forms (Ti,V)C solid solution after sintering.When increasing ntv from 4 to 15.75,the hardness of the cermets slightly changes,and the blending strength of the cermets firstly increases and then decreases.When nriv is 7.35,the microstructure of the cermets is refined,the blending strength is 1 237 MPa,the Vickers hardness is 1 444 N/mm2,the (Ti,V)C-based cermets has the best mechanical properties.