Ti<sub>3</sub>AlC<sub>2</sub>对PcBN材料显微结构及性能的影响

马金明; 肖长江; 陶宏均; 张群飞; 汤黎辉; 曹剑锋; 李远; 周世杰; 唐昱霖; 陈亚超; 栗正新

doi:10.13394/j.cnki.jgszz.2023.0048

Ti₃AlC₂对PcBN材料显微结构及性能的影响

doi: 10.13394/j.cnki.jgszz.2023.0048

1.
河南工业大学材料科学与工程学院，郑州 450001
2.
中原内配集团鼎锐科技有限公司，河南焦作 454750
3.
精工锐意科技（河南）有限公司，郑州 450001
4.
郑州沃德超硬材料有限公司，郑州 450001
5.
郑州海科研磨工具有限公司，郑州 450001

基金项目: 工业和信息化部科技高质量发展项目（203ZS20230005）；河南省重大科技专项（221100230100）；河南省2024年重点研发专项“新能源汽车关键零部件用高端系列超硬磨具研制及产业化”；郑州市重大科技专项（2021KJZX0062）。

详细信息

作者简介:
通信作者：栗正新，男，1964年生，教授、硕士生导师。主要研究方向：金刚石功能材料、先进超硬和普通磨料磨具、计算机模拟仿真和磨削技术等。E-mail：lizx012001@163.com

中图分类号: TQ164; TG74
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- 文章访问数: 80
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- PDF下载量: 10
- 被引次数: 0
出版历程
- 收稿日期: 2023-03-03
- 修回日期: 2023-06-10
- 录用日期: 2023-06-28
- 刊出日期: 2024-04-01

Effect of Ti₃AlC₂ content on microstructure and properties of PcBN materials

1.
School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
2.
ZYNP Group DING RUI Technology Co., Ltd., Jiaozuo 454750, Henan, China
3.
recision Industry Revolution Equipment Technology (Henan) Co., Ltd., Zhengzhou 450001, China
4.
Zhengzhou Wode Superhard Material Co., Ltd., Zhengzhou 450001, China
5.
Zhengzhou Hitko Dia/CBN Tool Co., Ltd., Zhengzhou 450001, China

摘要

摘要: 以不同质量分数的Ti₃AlC₂为结合剂，在5.5 GPa、1450 ℃的条件下，制备整体式PcBN复合刀具材料，分析不同质量分数的Ti₃AlC₂对PcBN刀具材料的物相、显微结构及力学性能的影响。结果表明：Ti₃AlC₂在高温高压下会完全分解成TiC、Al-Ti合金，并与cBN反应生成AlN、TiB₂和TiC_0.7N_0.3等物相；TiC、AlN、TiB₂和TiC_0.7N_0.3均匀分布在cBN周围并与cBN紧密黏结在一起，从而提升PcBN的力学性能。当Ti₃AlC₂质量分数为25%时，PcBN的相对密度、抗弯强度、断裂韧性和磨耗比均达到最大值，分别为98.9 %、592 MPa、6.87 MPa·m^1/2和7 350；当Ti₃AlC₂质量分数为20 %时，PcBN的显微硬度达到最大值4 786.7 HV。
- 聚晶立方氮化硼 /
- Ti₃AlC₂ /
- 结合剂 /
- 高温高压 /
- 力学性能
Abstract: The monolithic PcBN composite tool materials were prepared at 5.5 GPa and 1450 ℃ with different contents of Ti₃AlC₂ as the binder phase. The effects of different mass fractions of Ti₃AlC₂ on the phase composition, microstructure, and mechanical properties of PcBN tool materials were studied. The results show that Ti₃AlC₂ can decompose completely to form TiC and Al-Ti alloys under high temperature and high pressure, and reacts with cBN to form AlN, TiB₂, and TiC_0.7N_0.3 phases. TiC, AlN, TiB₂, and TiC_0.7N_0.3 are uniformly distributed around the cBN and tightly bonded to the cBN, thereby improving the mechanical properties of PcBN. When the mass fraction of Ti₃AlC₂ is 25 %, the relative density, bending strength, fracture toughness, and wear ratio of PcBN reach the maximum values, which are 98.9%, 592 MPa, 6.87 MPa·m^1/2and 7 350, respectively. When the mass fraction of Ti₃AlC₂ is 20%, the microhardness of PcBN reaches the maximum value of 4 786.7 HV.
- PcBN /
- Ti₃AlC₂ /
- binder /
- high temperature and high pressure(HTHP) /
- mechanical properties

HTML全文

图 1 Ti₃AlC₂形貌

Figure 1. Morphology of Ti₃AlC₂

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图 2 不同Ti₃AlC₂质量分数时PcBN的XRD图谱

Figure 2. XRD patterns of PcBN with different Ti₃AlC₂ contents

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图 3 不同Ti₃AlC₂质量分数时的PcBN显微结构

Figure 3. Microstructures of PcBN with different Ti₃AlC₂ mass fractions

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图 4 20%Ti₃AlC₂ 时制备的PcBN面扫描图

Figure 4. Surface scan map of PcBN prepared at 20% Ti₃AlC₂

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图 5 20%Ti₃AlC₂时制备的PcBN的EDS分析

Figure 5. EDS analysis of PcBN prepared at 20% Ti₃AlC₂

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图 6 不同Ti₃AlC₂质量分数时的PcBN的相对密度和抗弯强度

Figure 6. Relative density and bending strength of PcBN with different Ti₃AlC₂ mass fractions

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图 7 不同Ti₃AlC₂质量分数时烧结的PcBN的显微硬度与断裂韧性

Figure 7. Microhardness and fracture toughness of sintered PcBN with different Ti₃AlC₂ contents

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图 8 不同Ti₃AlC₂质量分数时烧结的PcBN的磨耗比

Figure 8. Wear ratios of sintered PcBN with different Ti₃AlC₂ contents

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表 1 实验配方

Table 1. Experimental formula

编号 cBN质量分数
ω₁ / % 结合剂Ti₃AlC₂质量分数
ω₂ / %

1 85 15
2 80 20
3 75 25
4 70 30

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