吉林大学学报(工学版) ›› 2024, Vol. 54 ›› Issue (4): 938-946.doi: 10.13229/j.cnki.jdxbgxb.20220628

• 材料科学与工程 • 上一篇    下一篇

（Mg2Si+Si）/Al复合材料的组织和耐磨性

刘晓波1(),杨淼2(),周德坤1   

  1. 1.北华大学 机械工程学院，吉林省 吉林市 132021
    2.北华大学 工程训练中心，吉林省 吉林市 132021
  • 收稿日期:2022-05-22 出版日期:2024-04-01 发布日期:2024-05-17
  • 通讯作者: 杨淼 E-mail:stone-666@126.com;yangmiao1021@163.com
  • 作者简介:刘晓波（1979-），女，副教授，博士. 研究方向：铝基复合材料的组织和性能. E-mail： stone-666@126.com
  • 基金资助:
    国家自然科学基金地区科学基金项目(51964011);吉林省科技发展计划项目(YDZJ202101ZYTS172);吉林省教育厅科学技术研究项目(JJKH20210036KJ)

Microstructure and wear resistance of （Mg2Si+Si）/Al composites

Xiao-bo LIU1(),Miao YANG2(),De-kun ZHOU1   

  1. 1.College of Mechanical Engineering，Beihua University，Jilin 132021，China
    2.Engineering Training Center，Beihua University，Jilin 132021，China
  • Received:2022-05-22 Online:2024-04-01 Published:2024-05-17
  • Contact: Miao YANG E-mail:stone-666@126.com;yangmiao1021@163.com

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摘要：

采用熔铸法制备了不同凝固速率的原位（Mg2Si+Si）/Al复合材料，研究了其组织和耐磨性。结果表明，磷改性后，初生Mg2Si为多边形块状，初生Si仍为复杂形貌。随着凝固速率的提高，初生Mg2Si和初生Si的数量随之增加，尺寸随之减小。萃取试验表明，Mg2Si晶体具有十四面体和六面体形貌。研究了不同滑动速度和载荷条件下复合材料对45#钢的干滑动磨损行为。结果表明，复合材料的耐磨性随着凝固速率的提高而提高，（Mg2Si+Si）/Al复合材料的失效机制主要是黏着磨损和磨粒磨损。

关键词: 原位（Mg2Si+Si）/Al复合材料, 显微组织, 干滑动磨损, 耐磨性

Abstract:

In-situ （Mg2Si+Si）/Al composites were prepared by using melting casting with different solidification rates. The microstructure and wear resistance of （Mg2Si+Si）/Al composites were investigated. The results show that， after P modification， the primary Mg2Si transformed to polygonal blocks， while the primary Si was mainly complex morphology. With increasing the solidification rate， the number of primary Mg2Si and primary Si particles increased and their particle sizes decreased. Extraction tests showed that the Mg2Si crystals had tetrahedral and hexahedral morphologies. Dry sliding wear behaviors of （Mg2Si+Si）/Al composites with different solidification rates against 45# steel， under conditions of different sliding speeds and loads， were investigated. The results show that， the wear resistance of （Mg2Si+Si）/Al composites increased with the increasing of the solidification rate. The wear mechanisms of （Mg2Si+Si）/Al composites are mainly adhesive wear and abrasive wear.

Key words: in-situ （Mg2Si+Si）/Al composites, microstructure, dry sliding wear, wear resistance

中图分类号: 

  • TB331

图1

凝固速率为V1时，（Mg2Si+Si）/Al复合材料的XRD图谱"

图2

（Mg2Si+Si）/Al复合材料的显微组织"

图3

利用萃取的方法从（Mg2Si+Si）/Al复合材料中获得的Mg2Si颗粒"

图4

六面体Mg2Si颗粒生长过程示意图"

图5

滑动速率为700 r/min时，（Mg2Si+Si）/Al复合材料的磨损体积和载荷的关系曲线"

图6

50 N载荷下，（Mg2Si+Si）/Al复合材料的磨损表面的SEM和EDS分析"

图7

（Mg2Si+Si）/Al复合材料的磨屑"

图8

（Mg2Si+Si）/Al复合材料磨损体积和滑动速率的关系曲线"

图9

滑动速率为1000 r/min时（Mg2Si+Si）/Al复合材料的磨损表面和EDS分析"

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