發(fā)布時(shí)間：2018-02-28 05:00

  本文關(guān)鍵詞： 機(jī)械球磨法 AZ合金 顯微組織 性能　出處：《鑄造技術(shù)》2017年05期 　論文類型：期刊論文

【摘要】：采用機(jī)械球磨法制備了超細(xì)納米晶AZ31合金,研究了球磨時(shí)間和包套溫?cái)D壓溫度對(duì)AZ31合金粉末形貌、顆粒尺寸、晶粒尺寸和力學(xué)性能的影響,并分析了球磨時(shí)間的作用機(jī)理。結(jié)果表明,機(jī)械球磨后的混合粉末的平均顆粒尺寸都要小于未經(jīng)過(guò)機(jī)械球磨的原料粉末,且隨著機(jī)械球磨時(shí)間的延長(zhǎng),粉末的平均顆粒尺寸減小;球磨80 h、250℃包套擠壓后AZ31合金棒材中的晶粒大小分布較為均勻,平均晶粒尺寸約為200 nm;在相同的包套擠壓溫度下,隨著機(jī)械球磨時(shí)間的延長(zhǎng),AZ31合金的顯微硬度都有逐漸增加的趨勢(shì);在相同的機(jī)械球磨時(shí)間下,隨著包套擠壓溫度的升高,AZ31合金的顯微硬度逐漸降低。隨著機(jī)械球磨時(shí)間的延長(zhǎng),AZ31合金的室溫屈服強(qiáng)度有所增加,在機(jī)械球磨時(shí)間為80 h時(shí)取得最大值453 MPa。
[Abstract]:Ultrafine nanocrystalline AZ31 alloys were prepared by mechanical ball milling. The effects of milling time and temperature extrusion temperature on the powder morphology, particle size, grain size and mechanical properties of AZ31 alloy were studied. The mechanism of milling time is analyzed. The results show that the average particle size of the mixed powder is smaller than that of the raw powder without mechanical ball milling, and with the prolonging of the milling time, the average particle size of the mixed powder after mechanical ball milling is smaller than that of the raw material powder without mechanical ball milling. The average particle size of the powder decreases, and the grain size distribution in the AZ31 alloy bar is more uniform after 80 h or 250 鈩，

本文編號(hào)：1545857