多次攪拌下TiN顆粒增強(qiáng)鋁基復(fù)合層組織與性能
發(fā)布時(shí)間：2018-10-29 13:45
【摘要】：采用攪拌摩擦加工制備了TiN顆粒增強(qiáng)鋁基復(fù)合材料,研究了攪拌次數(shù)對(duì)復(fù)合層晶粒尺寸、硬度、拉伸及磨損性能的影響。結(jié)果表明:攪拌加工時(shí)添加TiN顆�？商岣邚�(fù)合層的硬度、耐磨性。添加TiN顆粒的試樣經(jīng)4道次攪拌后,攪拌區(qū)最高硬度為136 HV,為同道次未加顆粒的1.12倍。未添加顆粒時(shí)復(fù)合層摩擦系數(shù)為0.5左右,添加顆粒時(shí)僅為0.3左右。經(jīng)4道次加工后添加TiN顆粒的復(fù)合材料強(qiáng)度由未添加時(shí)的380.40 MPa下降到329.97 MPa。隨攪拌次數(shù)的增加,攪拌區(qū)晶粒細(xì)化程度得以提高,TiN顆粒分布更加均勻,但攪拌次數(shù)對(duì)TiN顆粒增強(qiáng)鋁基復(fù)合材料的強(qiáng)度和硬度影響不大。
[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.
【作者單位】： 西南交通大學(xué)材料學(xué)院;燕山大學(xué)亞穩(wěn)材料制備技術(shù)與科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資助項(xiàng)目(2682014CX004)
【分類號(hào)】：TB333
本文編號(hào)：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.
【作者單位】： 西南交通大學(xué)材料學(xué)院;燕山大學(xué)亞穩(wěn)材料制備技術(shù)與科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資助項(xiàng)目(2682014CX004)
【分類號(hào)】：TB333
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