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AZ61鎂合金軟接觸電磁連鑄的研究
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TG146.20

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國家自然科學基金（50234020,50475157）：教育部重點項目（105052）


Research on Soft Contact Electromagnetic Continuous Casting of AZ61 Magnesium Alloy
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    摘要:

    采用軟接觸電磁連鑄法制備了AZ61鎂合金鑄錠，對其晶體結構、金相組織、力學性能及抗腐蝕性能進行了研究，并與金屬模鑄法制備的鑄錠作了比較。實驗發(fā)現(xiàn)：兩種方法制備的鑄錠相結構相同；軟接觸電磁連鑄鑄錠晶粒細小，第二相彌散分布，促使其力學性能有很大提高，常溫抗拉強度和延伸率分別提高了約30％和27％，其斷口形貌具有更多韌性斷裂的特征；在3．5％NaCl溶液中的動電位極化測試表明，軟接觸電磁連鑄可以使鎂合金的自腐蝕電壓升高，腐蝕電流密度降低，從而提高鎂合金的耐腐蝕性能。

    Abstract:

    The effects of soft-contact electromagnetic casting(EMC)on the phase constitution,microstructure,mechanical property,and corrosion resistance of AZ61 magnesium alloy were investigated by comparing with the die cast ingot.Results show that the ingots made by different methods have the same phase constitution.The soft-contact EMC ingots have more fine and uniform grain structure,which improves the mechanical property of magnesium alloys.The ultimate tensile strength and elongation of soft-contact EMC specimens increase by about 30% and 27%,respectively.Moreover the fracture morphologies of soft-contact EMC specimens have more characters of gliding fracture.The potentiodynamic polarization indicates that the soft-contact EMC ingots have much better corrosion resisting property than the die cast ones because the better microstructure of soft-contact EMC improves the corrosion potential and decreases the corrosion current density.

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房燦峰 張興國 季首華 于延浩 金俊澤. AZ61鎂合金軟接觸電磁連鑄的研究[J].稀有金屬材料與工程,2006,35(8):1319~1322.[Fang Canfeng, Zhang Xingguo, Ji Shouhua, Yu Yanhao, Jin Junze. Research on Soft Contact Electromagnetic Continuous Casting of AZ61 Magnesium Alloy[J]. Rare Metal Materials and Engineering,2006,35(8):1319~1322.]
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  • 收稿日期:2005-06-13
  • 最后修改日期:2005-08-10
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