复合区体积分数对氧化锆增韧氧化铝颗粒/40Cr空间结构复合材料冲击磨损性能的影响

胥长龙; 卢德宏; 唐露; 李明宇

doi:10.13801/j.cnki.fhclxb.20200220.002

复合区体积分数对氧化锆增韧氧化铝颗粒/40Cr空间结构复合材料冲击磨损性能的影响

doi: 10.13801/j.cnki.fhclxb.20200220.002

昆明理工大学　材料科学与工程学院，昆明 650032

基金项目: 国家自然科学基金(51461025)

详细信息

通讯作者:
卢德宏，博士，教授，博士生导师，研究方向为金属基复合材料　E-mail：ldhongkust@126.com

中图分类号: TB333
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出版历程
- 收稿日期: 2019-10-30
- 录用日期: 2020-01-09
- 网络出版日期: 2020-02-20
- 刊出日期: 2020-09-15

Effect of composite volume fraction on impact wear properties of zirconium oxide toughened alumina particles/40Cr architecture composites

School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650032, China

摘要

摘要: 为研究空间结构复合材料中复合区体积分数对复合材料冲击磨损性能的影响，采用挤压铸造法制备了不同复合区体积分数(35vol%、50vol%、65vol%)的氧化锆增韧氧化铝颗粒(ZTA_P)三维网络增强40Cr钢基复合材料(ZTA_P/40Cr空间结构复合材料)，经过850℃淬火和460℃回火，在冲击功为1.5 J下进行无磨料冲击磨损实验。结果表明：复合区体积分数为35vol%、50vol%、65vol%的ZTA_P/40Cr空间结构复合材料磨损率分别为4.68×10⁻³ cm³/h、3.40×10⁻³ cm³/h、1.04×10⁻³ cm³/h，ZTA_P/40Cr复合材料和40Cr钢的磨损率分别为13.41×10⁻³ cm³/h和79.87×10⁻³ cm³/h。ZTA_P/40Cr空间结构复合材料的耐磨性随复合区体积分数增加而提高。进一步分析表明，ZTA_P/40Cr空间结构复合材料的冲击磨损机制包含表面发生的磨粒磨损和黏着磨损，主要是基体黏着和整个表面被犁削及亚表层萌生的疲劳磨损，是由反复冲击过程中产生的ZTA_P破碎和ZTA_P与40Cr界面开裂导致的材料块状脱落。
- 空间结构 /
- 复合区体积分数 /
- 冲击磨损 /
- 挤压铸造 /
- 钢基复合材料
Abstract: In order to study the effect of composite volume fraction on the impact wear properties of composites in architecture composites, the zirconium oxide toughened alumina particles(ZTA_P) 3D network reinforced 40Cr steel matrix composites(ZTA_P/40Cr architecture composite) with different composite volume fractions(35vol%, 50vol%, 65vol%) were fabricated by squeeze casting, which were subjected to no abrasives impact wear test with an impact energy of 1.5 J after quenching at 850℃ and tempering at 460℃. The results show that when the volume fraction of the composite area is 35vol%, 50vol% and 65vol%, the wear rates of the ZTA_P/40Cr architecture composites are 4.7×10⁻³ cm³/h, 3.4×10⁻³ cm³/h and 1.0×10⁻³ cm³/h, respectively. The wear rates of the ZTA_P/40Cr composite and the 40Cr steel are 13.41×10⁻³ cm³/h and 79.87×10⁻³ cm³/h, respectively. The wear resistance of the ZTA_P/40Cr architecture composite increases as the volume fraction of the composite area increases. Further analysis show that the impact wear mechanism of the ZTA_P/40Cr architecture composite includes abrasive wear and adhesive wear on the surface, mainly the adhesion of the matrix and the ploughing of the entire surface, as well as the fatigue wear of the subsurface, which is a blockage of materials caused by ZTA_P breakage and ZTA_P/40Cr interfacial cracking during repeated impact.
- architecture structure /
- composite volume fraction /
- impact wear /
- squeeze casting /
- steel matrix composites

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图 1 复合区体积分数为50vol%的ZTA_P/40Cr空间结构复合材料的模型和实物

Figure 1. Model and physical diagrams of ZTA_P/40Cr architecture composites with composite area of 50vol% volume fraction

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图 2 MLD-10型动载磨损试验机

Figure 2. MLD-10 dynamic load abrasion tester

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图 3 ZTA_P/40Cr空间结构复合材料的复合区金相组织

Figure 3. Metallographic structure of composite area of ZTA_P/40Cr architecture composites

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图 4 ZTA_P/40Cr空间结构复合材料基体硬度及复合区硬度

Figure 4. Matrix hardness and composite area hardness of ZTA_P/40Cr architecture composites

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图 5 ZTA_P/40Cr复合材料的体积磨损量和体积磨损率

Figure 5. Volume wear and volume wear rate of ZTA_P/40Cr architecture composites

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图 6 ZTA_P/40Cr空间结构复合材料冲击磨损的SEM图像

Figure 6. SEM images of impact wear of ZTA_P/40Cr architecture composites((a), (b) 35vol%; (c), (d) 50vol%; (e), (f) 65vol%; (g) Uniform composite; (h) Matrix)

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图 7 不同复合区体积分数的ZTA_P/40Cr空间结构复合材料冲击磨损后亚表层组织

Figure 7. Subsurface organizations of ZTA_P/40Cr architecture composites with different composite volume fractions after impact wear

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图 8 ZTA_P/40Cr空间结构复合材料的冲击磨损示意图

Figure 8. Impact wear diagrams of ZTA_P/40Cr architecture composites

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表 1 氧化锆增韧氧化铝颗粒三维网络增强40Cr钢基(ZTA_P/40Cr)空间结构复合材料的模型设计

Table 1. Model designs of zirconium oxide toughened alumina particles 3D network reinforced 40Cr steel matrix(ZTA_P/40Cr) architecture composite

Volume fraction/vol%	Diameter/ mm	Wall thickness/ mm	Mode size/ mm
35	3.4	2.7	15×15×30
50	4.3	2.1	15×15×30
65	5.2	1.6	15×15×30

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