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非對(duì)稱軋制AZ31鎂合金板材組織與性能
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沈陽航空航天大學(xué)材料科學(xué)與工程學(xué)院,沈陽航空航天大學(xué)材料科學(xué)與工程學(xué)院,中國科學(xué)院金屬研究所,中國科學(xué)院金屬研究所

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國家自然科學(xué)基金資助(5077521,51174189)


Microstructure and mechanical properties of AZ31 magnesium alloy sheet processed by asymmetry rolling
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School of Materials Science and Engineering,Shenyang Aerospace University,School of Materials Science and Engineering,Shenyang Aerospace University,Institute of Metal Research,Chinese Academy of Sciences,Institute of Metal Research,Chinese Academy of Sciences

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National Natural Science Foundation of China (50975062); Science Foundation of Educational Department of Jiangxi Province (GJJ13064)

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    摘要:

    本文采用商用連鑄連軋AZ31鎂合金板材,通過小輥徑非對(duì)稱軋制工藝,研究在150℃,200℃,250℃溫度條件下多道次非對(duì)稱軋制對(duì)鎂合金板材組織、織構(gòu)和力學(xué)性能的影響。實(shí)驗(yàn)結(jié)果表明,不同軋制溫度下,鎂合金板材的晶粒細(xì)化機(jī)理不同,150℃時(shí)以孿晶細(xì)化為主,部分晶粒發(fā)生動(dòng)態(tài)再結(jié)晶,200℃和250℃時(shí)板材晶粒細(xì)化機(jī)理為動(dòng)態(tài)再結(jié)晶。對(duì)比分析了對(duì)稱軋制和非對(duì)稱軋制板材織構(gòu)演化規(guī)律,隨著軋制溫度的升高,非對(duì)稱軋制板材基面織構(gòu)依次增強(qiáng),但明顯低于對(duì)稱軋制板材。

    Abstract:

    The commercial twin-roll cast AZ31 magnesium alloy sheet is used in this paper. Multi-pass asymmetry rolling (ASR) is conducted on the sheet by small diameter rollers ASR at temperatures of 150℃, 200℃, 300℃, respectively, and the effect of ASR on the microstructure, texture, mechanical properties of rolled magnesium alloy sheet is investigated. The experimental results indicate that the mechanism of grain refinement is totally different at various temperatures: the grains are segmented into sub-grains by twins at 150℃, meanwhile, the dynamic recrystallization (DRX) is main grain refinement mechanism at 200℃ and 250℃, respectively. The texture evolution of the symmetry rolling (SR) and ASR sheet are analyzed, which predicts that the texture intensity of ASR sheet increases with rolling temperature elevated, but they are obviously lower than texture intensity of SR sheet.

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宋廣勝,姜敬前,陳帥峰,張士宏.非對(duì)稱軋制AZ31鎂合金板材組織與性能[J].稀有金屬材料與工程,2017,46(11):3512~3517.[Song Guang-sheng, Jiang Jing-qian, Chen Shuai-feng, ZhangShi-hong. Microstructure and mechanical properties of AZ31 magnesium alloy sheet processed by asymmetry rolling[J]. Rare Metal Materials and Engineering,2017,46(11):3512~3517.]
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  • 收稿日期:2015-09-07
  • 最后修改日期:2016-01-18
  • 錄用日期:2016-02-24
  • 在線發(fā)布日期: 2017-12-13
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