陶瓷颗粒增强粉末冶金Fe-2Cu-0.6C复合材料的微观结构和力学性能

何勤求; 李普明; 袁勇; 张德金; 刘增林; 李松林

doi:10.19591/j.cnki.cn11-1974/tf.2019.01.002

陶瓷颗粒增强粉末冶金Fe-2Cu-0.6C复合材料的微观结构和力学性能

doi: 10.19591/j.cnki.cn11-1974/tf.2019.01.002

1.
中南大学粉末冶金国家重点实验室, 长沙 410083
2.
莱芜钢铁集团粉末冶金有限公司, 莱芜 271105

基金项目:

国家高技术研究发展计划（863计划）资助项目 2013AA031102

详细信息

通讯作者:
李松林, E-mail: lisl@csu.edu.cn

中图分类号: TF125
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出版历程
- 收稿日期: 2018-07-24
- 刊出日期: 2019-02-27

Microstructure and mechanical properties of ceramic particle-reinforced powder metallurgy Fe-2Cu-0.6C composites

1.
State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China
2.
Laiwu Iron & Steel Group Powder Metallurgy Co., Ltd., Laiwu 271105, China

More Information

Corresponding author: LI Song-lin, E-mail: lisl@csu.edu.cn

摘要

摘要: 采用传统粉末冶金压制/烧结技术，经600 MPa压制、1140℃烧结制备了陶瓷颗粒增强（SiC、TiC及TiB₂陶瓷颗粒，质量分数0~1.6%）Fe-2Cu-0.6C低合金钢复合材料，对三种复合材料的微观结构和力学性能进行了研究。结果表明：在烧结过程中，SiC与TiB₂颗粒与基体发生反应，故而与基体界面结合良好；当添加质量分数为1.6%的SiC颗粒时，复合材料烧结后的布氏硬度与抗拉强度分别比基体提高了35.9%、69.4%；添加质量分数为1.2%的TiB₂颗粒时，复合材料相对密度比基体提高了5.3%，其烧结硬度、抗拉强度与基体相比分别提高了77.9%、72.6%；由于烧结过程中TiC颗粒不与基体发生反应，故而添加TiC颗粒对复合材料的布氏硬度、抗拉强度影响不大。
- 颗粒增强 /
- 粉末冶金 /
- 铁基复合材料 /
- 力学性能
Abstract: Ceramic particle-reinforced Fe-2Cu-0.6C low-alloy steel composites (SiC, TiC, and TiB₂ ceramic particles in the mass fraction of 0~1.6%) were prepared by the conventional powder pressing/sintering technology at 600 MPa and 1140℃, the microstructures and mechanical properties of composites were investigated. The results show a good interface bonding between the reinforced particles (SiC and TiB₂) and the matrix because of the reaction during sintering. The Brinell hardness and tensile strength of the sintered composites added with 1.6% SiC particles by mass increase by 35.9% and 69.4%, respectively, compared with those of Fe-2Cu-0.6C matrix. When 1.2% TiB₂ particles by mass are introduced, the hardness and tensile strength of the sintered composites increase by 77.9% and 72.6%, respectively, compared with those of the matrix. Meanwhile, it is noted that the relative density of the TiB₂-reinforced low-alloy steel composite also increases by 5.3%. The addition of TiC particles has little effect on the Brinell hardness and tensile strength of the composites due to no reaction between TiC particles and the matrix.
- particle reinforcement /
- powder metallurgy /
- iron-based composites /
- mechanical property

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图 1 基体和复合材料的金相组织：（a）基体；（b）1.2% SiC；（c）1.2% TiC；（d）1.2% TiB₂

Figure 1. Metallographic structures of the matrix and composites: (a) matrix; (b) 1.2% SiC; (c) 1.2% TiC; (d) 1.2% TiB₂

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图 2 添加陶瓷颗粒的复合材料界面能谱分析：（a）SiC；（b）TiC；（c）TiB₂

Figure 2. Interface EDS analysis of ceramic particle-reinforced composites: (a) SiC; (b) TiC; (c) TiB₂

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图 3 陶瓷颗粒质量分数对复合材料生坯和烧结坯相对密度的影响：（a）SiC；（b）TiC；（c）TiB₂

Figure 3. Effects of ceramic particle contents by mass on the relative density of green and sintered composite parts: (a) SiC; (b) TiC; (c) TiB₂

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图 4 陶瓷颗粒质量分数对复合材料硬度的影响：（a）SiC；（b）TiC；（c）TiB₂

Figure 4. Effects of ceramic particle contents by mass on composite hardness: (a) SiC; (b) TiC; (c) TiB₂

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图 5 陶瓷颗粒质量分数对复合材料抗拉强度的影响：（a）SiC；（b）TiC；（c）TiB₂

Figure 5. Effects of ceramic particle contents by mass on the tensile strength of composite: (a) SiC; (b) TiC; (c) TiB₂

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图 6 基体和复合材料断口形貌：（a）基体；（b）1.6% SiC；（c）1.6% TiC；（d）1.6% TiB₂

Figure 6. Fracture surfaces of the matrix and composites: (a) matrix; (b) 1.6% SiC; (c) 1.6% TiC; (d) 1.6% TiB₂

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表 1 FHY100.27还原铁粉化学成分（质量分数）

Table 1. Chemical composition of FHY100.27 reduced iron powder %

C	Si	Mn	P	S	氢损（HL）	全铁含量（TFe）
0.010	0.100	0.330	0.012	0.011	0.180	98.570

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表 2 陶瓷颗粒增强复合材料体系组成（质量分数）

Table 2. Composition of ceramic particle-reinforced composite system %

铜粉	石墨	陶瓷颗粒（SiC、TiC、TiB₂）	铁粉
2.0	0.6	0.4、0.8、1.2、1.6	余量

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