山东科学 ›› 2018, Vol. 31 ›› Issue (3): 28-33.doi: 10.3976/j.issn.1002-4026.2018.03.005

• 新材料 • 上一篇    下一篇

碳化钨基硬质合金的制备与力学性能研究

颜新宇1,王守仁1*,王勇2   

  1. 1. 济南大学机械工程学院,山东 济南 250022;2. 济南大学物理科学与技术学院,山东 济南 250022
  • 收稿日期:2018-01-29 出版日期:2018-06-20 发布日期:2018-06-20
  • 通信作者: 王守仁。E-mail: sherman0158@163.com E-mail:sherman0158@163.com
  • 作者简介:颜新宇(1992—),男,硕士,研究方向为摩擦学应用与研究。
  • 基金资助:

    国家自然科学基金(51372101);山东省泰山学者工程专项经费

Preparation and mechanical properties of tungsten carbidebased cemented carbides

YAN Xin-yu1, WANG Shou-ren1*,WANG Yong2   

  1. 1.School of Mechanical Engineering,University of Jinan,Jinan 250022, China;2.School of Physics and Technology, University of Jinan,Jinan 250022, China
  • Received:2018-01-29 Online:2018-06-20 Published:2018-06-20

摘要:

在碳化钨粉末中加入一定量的钴、碳化钽以及碳化铪,经过混料、球磨、冷压成型和热压烧结等步骤制备出硬质合金试样。利用1 000 N维式显微硬度计、三点弯曲试验、XJJ-5冲击试验机以及扫描电镜分别对试样硬度、抗弯强度、冲击韧性以及试样的微观形貌进行了研究,并对试样力学性能的提高机理进行了探讨。结果表明,碳化铪的加入可有效改善烧结质量,细化晶粒,改善试样力学性能。碳化铪质量分数为2%的试样力学性能最好。

关键词: 碳化铪, 粉末冶金, 硬质合金, 力学性能

Abstract:

A certain amount of cobalt, tantalum carbide and hafnium carbide powder were added to tungsten carbide powder to prepare a cemented carbide sample through mixing, ball milling, cold forming and hot pressing sintering. The hardness, bending strength, impact toughness, and micromorphology of the specimens were studied using a 1 000 N dimensional microhardness tester, a threepoint bending test, an XJJ-5 impact tester, and a scanning electron microscope, then the mechanism of improving the mechanical properties of the specimen was discussed. The results show that the addition of hafnium carbide can effectively improve the sintering quality, inhibit the growth of tungsten carbide grains and improve the mechanical properties of the samples. The samples with hafnium carbide content of 2% have the best mechanical properties.

Key words: mechanical properties, powder metallurgy, hafnium carbide, cemented carbide

中图分类号: 

  • TB331