碳添加量对TiC基金属陶瓷组织与性能的影响

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摘要以TiC粉、Mo粉、WC粉和Ni粉为原料,分别添加0,1%,2%和3%(质量分数)的C粉,制备TiC-WC-Ni-Mo金属陶瓷,研究碳添加量对TiC基金属陶瓷组织与性能的影响。结果表明,TiC基金属陶瓷为典型的由金属粘结相和陶瓷相组成的黑芯灰壳结构,芯部的主要成分为TiC,壳相由Ti、W、Mo等元素组成。随碳添加量增加,金属陶瓷的晶粒度变小,但孔隙率增加,壳相变薄,材料硬度下降,抗弯强度先增加后降低。碳添加量为2%时,材料的抗弯强度达到最大值,为1 061 MPa,维氏硬度为14.29 GPa。

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	姚松松
	成会朝
	范景莲
	刘涛

关键词 ：碳含量, TiC基金属陶瓷, 抗弯强度, 显微组织, 显微硬度

Abstract：Using TiC powder, Mo powder, WC powder, and Ni powder as raw materials, 0, 1%, 2%, and 3% (mass fraction) of C powder were respectively added to prepare TiC-WC-Ni-Mo cermets, and the effects of C additive amount on the microstructure and properties of TiC based cermets were studied. The results show that the TiC-based cermets shows a typical black-core and grey-rim structure the main component of the core is TiC, and the rim is composed of Ti, W, Mo and other elements. With the increase of C additive amount, the grain size of the cermets decreases, but the porosity increases, the rim becomes thinner, the hardness of the material decreases, and the bending strength increases first and then decreases. When the C additive amount is 2%, the bending strength of the material reaches the maximum value of 1 061 MPa, and the hardness is 14.29 GPa.

Key words： C additive amount TiC-based cermets bending strength microstructure hardness

收稿日期: 2018-01-12 出版日期: 2019-07-19

ZTFLH:

TG148

通讯作者: 成会朝,副教授,博士。电话：15874996580;E-mail: chc26@sina.com

引用本文:

姚松松, 成会朝, 范景莲, 刘涛. 碳添加量对TiC基金属陶瓷组织与性能的影响[J]. 粉末冶金材料科学与工程, 2018, 23(6): 569-574.
YAO Songsong, CHENG Huichao, FAN Jinglian, LIU Tao. Effects of carbon additive amount on the microstructure and properties of TiC-based cermets. Materials Science and Engineering of Powder Metallurgy, 2018, 23(6): 569-574.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2018/V23/I6/569

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