| Purifying effect of new flux on magnesium alloy |
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| 作者姓名： | 高洪涛 吴国华 丁文江 朱燕萍 |
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| 作者单位： | State Key Laboratory of Metal Matrix Composites，State Key Laboratory of Metal Matrix Composites，State Key Laboratory of Metal Matrix Composites，State Key Laboratory of Metal Matrix Composites Shanghai Jiaotong University，Shanghai 200030，China，Shanghai Jiaotong University，Shanghai 200030，China，Shanghai Jiaotong University，Shanghai 200030，China，Shanghai Jiaotong University，Shanghai 200030，China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 1 INTRODUCTIONAsoneofthelighteststructurematerials ,mag nesiumalloysofferlightmass(ρ<2 g·cm- 3) ,specif icstrength (higherthanthatofthealuminumalloysandsteels) ,specificstiffness ,excellentmachinabili ty ,superiordampingandmagneticshieldingcapaci ties,whichleadstoagrowinginterestinmagnesiumanditsalloys .Inrecentyears ,magnesiumalloyshavebeenwidelyusedinaviation ,spaceflight,automobileandelectronicsindustries1] .Since 1990 stheirappli cationhassteadilyextendedanditispredictedthatitwill…
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| 关 键 词： | 镁合金 AZ91D合金 净化 非金属夹杂 造渣 精炼 |
Purifying effect of new flux on magnesium alloy |
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| GAO Hong-tao,WU Guo-hua,DING Wen-jiang,ZHU Yan-ping.Purifying effect of new flux on magnesium alloy[J].Transactions of Nonferrous Metals Society of China,2004,14(3):530-536. |
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| Authors: | GAO Hong-tao WU Guo-hua DING Wen-jiang ZHU Yan-ping |
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| Abstract: | A new flux which can remove both Fe and non-metallic inclusions in magnesium alloy was introduced.The Fe content of the magnesium alloy can be decreased greatly from 0. 062% to lower than 0. 005% (degree of AZ91D) after being purified by this new flux. The optimum addition of B2O3 in the flux is 0. 58 % by Gaussian Curve Fitting. Corrosion rate was measured after the specimen being immersed in 5 % NaCl solution for 3 d. The resuits show that the corrosion rate of the magnesium alloy after purification by the new flux is only 0.3 mg · cm-2 ·d-1. On the other hand, non-metallic inclusions in the magnesium alloy decrease with increasing addition of JDMJ in the new flux. Average volume fraction of the non-metallic inclusions in the magnesium alloy decreases from 1.52 % to 1.08%, which leads to improvement in the mechanical properties of the magnesium alloy by 30%. The mechanisms of Fe reduction and non-metallic inclusion-removing in magnesium melt by purification with the new flux were also revealed. |
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| Keywords: | magnesium alloy flux purification Fe non-metallic inclusion |
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