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超聲沖擊對(duì)AZ91D鎂合金耐磨性能及顯微硬度的影響
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華東交通大學(xué),華東交通大學(xué),華東交通大學(xué),華東交通大學(xué)

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TG

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）；江西省教育廳自然科學(xué)基金；江西省自然科學(xué)基金


The effect of ultrasonic impact treating on wear resistance and micro-hardness of AZ91D magnesium alloy
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East China Jiaotong University,East China Jiaotong University,East China Jiaotong University,East China Jiaotong University

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    摘要:

    模板采用HJ-III型超聲沖擊設(shè)備對(duì)AZ91D鎂合金表面了沖擊處理，利用高倍透射電子顯微鏡研究了超聲沖擊細(xì)化晶粒的機(jī)理。分別研究了經(jīng)超聲沖擊處理和未經(jīng)處理的AZ91D鎂合金的耐磨性能。用掃描電鏡和顯微硬度計(jì)研究了超聲沖擊處理對(duì)微觀組織和顯微硬度的影響。結(jié)果表明，超聲沖擊使AZ91D鎂合金的表面出現(xiàn)了嚴(yán)重的塑性變形，塑變層深度約為120 祄，表面組織明顯得到細(xì)化。并在AZ91D鎂合金的沖擊表面出現(xiàn)了殘余壓應(yīng)力。超聲沖擊可極大的提高AZ91D鎂合金的耐磨性能和顯微硬度。耐磨性能和顯微硬度隨超聲沖擊電流和沖擊時(shí)間的增加而提高，表明超聲沖擊是提高AZ91D鎂合金耐磨性能和顯微硬度的一種有效方法。

    Abstract:

    The surface of AZ91D magnesium alloy was treated using HJ-III type ultrasonic impact treating (UIT) machine and the grain refining mechanism of ultrasonic impact treating was investigated by means of HTEM. The wear resistance of AZ91D magnesium alloy was experimentally studied both for the treated and un-treated samples respectively. The effect of UIT on the microstructure, and micro-hardness were also investigated using SEM and micro-hardness tester. The experimental results indicate that the severe plastic deformation in the surface of AZ91D was formed by UIT, the thickness of the plastic deformation layer is about 120 祄, and the grains are highly refined and compressive residual stress in the surface of AZ91D was also obtained. The wear resistance and micro-hardness of AZ91D alloy could be greatly improved via UIT. The wear resistance and micro-hardness are promoted by increasing the UIT current and time, which indicates that the UIT is a useful method to increase the hardness and wear resistance of AZ91D alloy.

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引用本文

何柏林,于影霞,夏崧崧,呂宗敏.超聲沖擊對(duì)AZ91D鎂合金耐磨性能及顯微硬度的影響[J].稀有金屬材料與工程,2017,46(1):17~22.[He bolin, Yu yingxia, Xia songsong, Lv zongmin. The effect of ultrasonic impact treating on wear resistance and micro-hardness of AZ91D magnesium alloy[J]. Rare Metal Materials and Engineering,2017,46(1):17~22.]
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  • 收稿日期:2014-09-27
  • 最后修改日期:2014-10-31
  • 錄用日期:2014-12-03
  • 在線發(fā)布日期: 2017-03-16
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