多次搅拌下TiN颗粒增强铝基复合层组织与性能
发布时间：2018-10-29 13:45
【摘要】：采用搅拌摩擦加工制备了TiN颗粒增强铝基复合材料,研究了搅拌次数对复合层晶粒尺寸、硬度、拉伸及磨损性能的影响。结果表明:搅拌加工时添加TiN颗粒可提高复合层的硬度、耐磨性。添加TiN颗粒的试样经4道次搅拌后,搅拌区最高硬度为136 HV,为同道次未加颗粒的1.12倍。未添加颗粒时复合层摩擦系数为0.5左右,添加颗粒时仅为0.3左右。经4道次加工后添加TiN颗粒的复合材料强度由未添加时的380.40 MPa下降到329.97 MPa。随搅拌次数的增加,搅拌区晶粒细化程度得以提高,TiN颗粒分布更加均匀,但搅拌次数对TiN颗粒增强铝基复合材料的强度和硬度影响不大。
[Abstract]:TiN particle reinforced aluminum matrix composites were prepared by friction stir processing. The effects of stirring times on the grain size, hardness, tensile and wear properties of the composite layer were studied. The results show that the hardness and wear resistance of the composite layer can be improved by adding TiN particles. The maximum hardness of the samples added with TiN particles was 1. 12 times of that of non-particles in the same pass after 4-pass agitation. The maximum hardness of the agitated zone was 1. 12 HV,. The friction coefficient of the composite layer is about 0.5 when the particles are not added, and about 0.3 when the particles are added. After 4 passes of processing, the strength of composites with TiN particles decreased from 380.40 MPa to 329.97 MPa.. With the increase of stirring times, the grain refinement degree and the distribution of TiN particles in the stirring zone were increased, but the stirring times had little effect on the strength and hardness of the TiN particle reinforced aluminum matrix composites.
【作者单位】： 西南交通大学材料学院;燕山大学亚稳材料制备技术与科学国家重点实验室;
【基金】：中央高校基本科研业务费专项资助项目(2682014CX004)
【分类号】：TB333
本文编号：2297863
[Abstract]:TiN particle reinforced aluminum matrix composites were prepared by friction stir processing. The effects of stirring times on the grain size, hardness, tensile and wear properties of the composite layer were studied. The results show that the hardness and wear resistance of the composite layer can be improved by adding TiN particles. The maximum hardness of the samples added with TiN particles was 1. 12 times of that of non-particles in the same pass after 4-pass agitation. The maximum hardness of the agitated zone was 1. 12 HV,. The friction coefficient of the composite layer is about 0.5 when the particles are not added, and about 0.3 when the particles are added. After 4 passes of processing, the strength of composites with TiN particles decreased from 380.40 MPa to 329.97 MPa.. With the increase of stirring times, the grain refinement degree and the distribution of TiN particles in the stirring zone were increased, but the stirring times had little effect on the strength and hardness of the TiN particle reinforced aluminum matrix composites.
【作者单位】： 西南交通大学材料学院;燕山大学亚稳材料制备技术与科学国家重点实验室;
【基金】：中央高校基本科研业务费专项资助项目(2682014CX004)
【分类号】：TB333
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