硬质相含量对Ti~C,N-304不锈钢金属陶瓷力学性能的影响

张伟耀 1; 高义民 1; 何林 1; 2; 李烨飞 2; 刘志伟 2

doi:10.7652/xjtuxb201810022

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硬质相含量对Ti~C,N-304不锈钢金属陶瓷力学性能的影响

更新时间：2025-07-09

- 硬质相含量对Ti~C,N-304不锈钢金属陶瓷力学性能的影响
- Effects of Ti(C,N)Content on Mechanical Properties of Ti(C,N)-304 Stainless Steel Cermet
- 西安交通大学学报 2018年52卷第10期页码：159-166
- 作者机构：
  
  1. 西安交通大学金属材料强度国家重点实验室,西安,710049
  2. 西安交通大学铸造及耐磨材料研究所,西安,710049
- 作者简介：
- 基金信息：
  
  : 2018-04-02。作者简介: 张伟耀(1993-),男,硕士生;何林(通信作者),男,博士。基金项目: 国家自然科学基金资助项目(51501139);广东省科技计划资助项目(2015B010122003);广州市科技计划资助项目(201604046009)
- DOI：10.7652/xjtuxb201810022
  中图分类号： TF124
- 网络首发：2018-10-10，
  
  纸质出版：2018
- 稿件说明：
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张伟耀 1, 高义民 1, 何林 1, 等. 硬质相含量对Ti~C,N-304不锈钢金属陶瓷力学性能的影响[J]. 西安交通大学学报, 2018,52(10):159-166.

Effects of Ti(C,N)Content on Mechanical Properties of Ti(C,N)-304 Stainless Steel Cermet[J]. 2018, 52(10): 159-166.
张伟耀 1, 高义民 1, 何林 1, 等. 硬质相含量对Ti~C,N-304不锈钢金属陶瓷力学性能的影响[J]. 西安交通大学学报, 2018,52(10):159-166. DOI： 10.7652/xjtuxb201810022.

Effects of Ti(C,N)Content on Mechanical Properties of Ti(C,N)-304 Stainless Steel Cermet[J]. 2018, 52(10): 159-166. DOI： 10.7652/xjtuxb201810022.

摘要

采用传统粉末冶金的方法研究了Ti(C

N)硬质相含量对Ti(C

N)-304不锈钢金属陶瓷的微观组织和力学性能的影响。通过扫描电子显微镜和透射电子显微镜观测了不同硬质相含量的金属陶瓷的微观组织、断口形貌、裂纹传播规律以及晶界微裂纹的产生

并基于体视学原理分析了硬质相邻接度和粘结相平均自由程。使用阿基米德排水法、洛氏硬度计和三点弯曲法分别测量了金属陶瓷的致密度、硬度和抗弯强度

结果表明:随着硬质相含量的增加

金属陶瓷硬质相平均颗粒直径先减小后增大

在硬质相体积分数为75%时

达到最大致密度(98.4%)、硬度(HRA 89.2)和抗弯强度(1 291 MPa); 在裂纹传播过程中

以沿晶断裂为主

穿晶断裂为辅; 大颗粒更容易发生穿晶断裂

且由于大颗粒存在尖角

容易导致应力集中形成微裂纹

不利于材料力学性能的提高。

Abstract

The effects of Ti(C

N)content on microstructure and mechanical properties of Ti(C

N)-304 stainless steel cermet are analyzed. Scanning electron microscopy and transmission electron microscopy are adopted to observe the microstructures

fracture morphology

crack propagation and microcrack in the cermet with different hard phase content. The contiguity of the hard phase and the binder mean free path are discussed following the stereological principle. The relative density

hardness and transverse rupture strength of the cermet are measured with Archimedes principle

Rockwell hardness tester and three-point-bending method

respectively. With the increasing hard phase content

the average particle diameter of the hard phase firstly decreases and then increases. When the hard phase content is 75%

the cermet obtains the maximum relative density(98.4%)

maximum hardness(HRA 89.2)and maximum transverse rupture strength(1 291 MPa). In the process of crack propagation

intergranular fracture and transgranular fracture simultaneously appear

but the former is in majority. Large Ti(C

N)grains are more prone to appear transgranular fracture. The stress concentration due to sharp corners of large particles leads to microcrack

which is not conducive to improve the mechanical properties of the material.

关键词

Keywords

references

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