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固相再生AZ31B鎂合金的組織與力學(xué)性能
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佳木斯大學(xué) 材料科學(xué)與工程學(xué)院,哈爾濱理工大學(xué),佳木斯大學(xué) 材料科學(xué)與工程學(xué)院,佳木斯大學(xué) 材料科學(xué)與工程學(xué)院,佳木斯大學(xué) 材料科學(xué)與工程學(xué)院,佳木斯大學(xué) 材料科學(xué)與工程學(xué)院

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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）；黑龍江省自然科學(xué)基金；黑龍江省教育廳項(xiàng)目；


Microstructure and Mechanical properties of AZ31B magnesium alloy prepared by solid -state recycling
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    摘要:

    在不同的擠壓溫度和擠壓比下,將AZ31B鎂合金機(jī)加屑冷壓后熱擠壓固結(jié)而再生鎂合金。與鑄錠擠壓合金對(duì)比,從動(dòng)態(tài)再結(jié)晶組織與屑間結(jié)合情況兩個(gè)主要方面分析了加工工藝對(duì)再生合金力學(xué)性能的影響。隨著擠壓溫度升高,再生合金的極限抗拉強(qiáng)度和延伸率先增加而后降低。隨擠壓溫度升高,晶粒長(zhǎng)大與屑間結(jié)合增強(qiáng)的相反作用共同導(dǎo)致了再生合金力學(xué)性能的變化。當(dāng)擠壓比從4:1 增加到 44:1,晶粒細(xì)化且屑間結(jié)合增強(qiáng),使再生合金的抗拉強(qiáng)度增加。而當(dāng)擠壓比高于25:1時(shí),由于顯著的形變強(qiáng)化作用導(dǎo)致延伸率下降。

    Abstract:

    Machined chips of AZ31B magnesium alloy were consolidated by cold pressing and then hot extruding under different processing temperatures and extrusion ratios. Being compared with ingot extruding alloy, the influences of processing technology on mechanical properties were analyzed from two main aspects that involving the dynamic recrystallization microstructure and the bonding condition between chips. With the increasing extrusion temperature, the ultimate tensile strength and elongation to failure of the recycled alloys firstly increase and then decrease. The combined action of grain growth and improvement of the bonding between chips with the increasing extrusion temperature results in the variations of mechanical properties of the recycled alloy. With the increasing extrusion ratio from 4:1 to 44:1, grain is refined, and the bonding between chips is enhanced. This contribute to the increased ultimate tensile strength of recycled alloy. Whereas elongation to failure decrease when extrusion ratio is higher than 25:1 due to the significant deformation strengthening.

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武淑艷,吉澤升,胡明,黃志求,田春英,吳明忠.固相再生AZ31B鎂合金的組織與力學(xué)性能[J].稀有金屬材料與工程,2018,47(3):736~741.[wushuyan, jizesheng, huming, huangzhiqiu, tianchunying, wumingzhong. Microstructure and Mechanical properties of AZ31B magnesium alloy prepared by solid -state recycling[J]. Rare Metal Materials and Engineering,2018,47(3):736~741.]
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  • 收稿日期:2016-04-07
  • 最后修改日期:2016-05-29
  • 錄用日期:2016-06-12
  • 在線發(fā)布日期: 2018-04-11
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