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AZ31B鎂合金管材縱連軋損傷與溫度場(chǎng)探索性研究
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太原科技大學(xué)重型機(jī)械教育部工程研究中心,太原科技大學(xué)重型機(jī)械教育部工程研究中心,太原科技大學(xué)重型機(jī)械教育部工程研究中心,太原科技大學(xué)重型機(jī)械教育部工程研究中心,太原理工大學(xué)機(jī)械工程學(xué)院,山西創(chuàng)奇實(shí)業(yè)有限公司

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中圖分類號(hào):

TG 146.2 2

基金項(xiàng)目:

山西省科技攻關(guān)計(jì)劃(項(xiàng)目號(hào)20140321008-08)


The Exploratory Research for Damage and Temperature Field with Continual Mandrel Rolling Process of AZ31B Magnesium Alloy Tube
Author:
Affiliation:

Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Scienceand Technology,College of Mechanical Engineering,Taiyuan University of Technology,Shanxi Chuangqi Industrial Co., Ltd.

Fund Project:

National Natural Science Foundation of China (10872044, 10602013, 10972051, 10902023); Natural Science Foundation of Liaoning Province of China (20082161)

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    摘要:

    在軋制溫度為350℃,軋輥角速度約為3.14rad/s,壁厚壓下量分別為20％、30％、40％的條件下,對(duì)尺寸為50mmX7mmX1000mm的AZ31B鎂合金管進(jìn)行縱連軋熱力耦合數(shù)值模擬,在相同溫度不同壓下量的軋制條件下,從軋制損傷的應(yīng)力狀態(tài)和溫度場(chǎng)分布兩方面對(duì)鎂合金管材縱連軋的數(shù)值模擬結(jié)果進(jìn)行了探索性研究。結(jié)果表明：在相同軋制溫度條件下,隨著壓下量的增大,最大損傷值也隨著增大,且最大損傷值均出現(xiàn)在軋輥的輥縫處。同時(shí)塑性變形產(chǎn)生的熱量也增大,且因軋輥輥?lái)斕幒玩V管間存在較大的熱交換,所以輥縫處的溫度要高于輥?lái)斕?兩者之間有一定的溫度差,壁厚壓下量越大則溫度差越大。相同壓下量條件下,縱連軋鎂合金管的損傷程度要比鎂合金板材軋制的小。

    Abstract:

    When the rolling temperature was 350℃, the angular velocity of the roller was about 3.14rad/s and the wall thickness reduction rate was 20%, 30% and 40% respectively, the coupled thermo-mechanical numerical simulation of the AZ31B magnesium alloy tube with the size of 50mmX7mmX1000mm in continual mandrel rolling process was carried. Then, the research on the damage stress and the distribution of temperature field of the simulation was conducted on the condition that the magnesium alloy tube was at the same rolling temperature but differ in reduction rate.The results show that: when the rolling temperature is same, the maximum damage value of the AZ31B magnesium alloy tube and the heat generated by the plastic deformation is increased with the increase of the wall thickness reduction ratio. With the location of the maximum damage value appears in the roller gap. And, because of the large heat exchange between the roller and the tube, the temperature of the roller gap is higher than the top of the roller, and the temperature difference is increased with the increase of the Wall thickness reduction ratio.So, when in the same rolling condition, the damage of magnesium alloy tube in Longitudinal rolling is smaller than the magnesium alloy sheet.

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引用本文

茍毓俊,雙遠(yuǎn)華,周研,代佳,劉邱祖,張培慶. AZ31B鎂合金管材縱連軋損傷與溫度場(chǎng)探索性研究[J].稀有金屬材料與工程,2017,46(11):3326~3331.[Gou Yujun, Shuang Yuanhua, Zhou Yan, Dai Jia, Liu Qiuzu, Zhang Peiqing. The Exploratory Research for Damage and Temperature Field with Continual Mandrel Rolling Process of AZ31B Magnesium Alloy Tube[J]. Rare Metal Materials and Engineering,2017,46(11):3326~3331.]
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  • 收稿日期:2015-09-10
  • 最后修改日期:2015-12-15
  • 錄用日期:2016-01-14
  • 在線發(fā)布日期: 2017-12-13
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