| EFFECT OF La-RICH RE ON THE STRUCTURE AND PROPERTIES OF B319 ALLOY IN LOST FOAM CASTING |
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| 作者姓名： | 吴国华 谢敏 王叶双 马春江 朱燕萍 丁文江 |
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| 作者单位： | State Key Lab. of Metal Matrix Composite，Shanghai Jiaotong Univ.，Shanghai 200030，China |
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| 基金项目： | China Postdoctoral Fund(2 0 0 0 ,No.2 9 |
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| 摘 要： | IntroductionLost foam casting( LFC) process is a newtechnology that is different from the conventionalempty mould cavity casting completely.This tech-nology is an important orientation of casting tech-nology,and is called as casting technology for to-morrow.At present,the studies on LFC are fo-cused on casting techniques mainly1～ 5] .There islittle information on the structure and mechanicalproperties of B31 9in LFC process.Now for alu-minum alloy in LFC process,the main problemsare se…
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EFFECT OF La-RICH RE ON THE STRUCTURE AND PROPERTIES OF B319 ALLOY IN LOST FOAM CASTING |
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| WU Guo hua,XIE Min,WANG Ye shuang,MA Chun jiang,ZHU Yan ping,DING Wen jiang.EFFECT OF La-RICH RE ON THE STRUCTURE AND PROPERTIES OF B319 ALLOY IN LOST FOAM CASTING[J].Journal of Shanghai Jiaotong university,2002,7(2):179-184. |
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| Authors: | WU Guo hua XIE Min WANG Ye shuang MA Chun jiang ZHU Yan ping DING Wen jiang |
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| Institution: | State Key Lab. of Metal Matrix Composite, Shanghai Jiaotong Univ., Shanghai 200030, China |
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| Abstract: | By use of ICP spectroscopy, energy spectrum analysis, hydrogen tester, image analyzer, the differential scanning calorimetric (DSC) and microscope analysis, the effects of RE on the Porosity, structure and properties of B319 aluminum alloy were studied. The results show that under the 0. 3 C/s slow cooling rate in lost foam casting, the effect of RE on modification and grain size of B319 aluminum alloy is little. With the increase of RE master alloy, the tensile strength and elongation increase. When RE＞0. 15%, block-like La2Si2Al3 phase appear, and the tensile strength and elongation decrease. The results also show that the melt hydrogen content and casting porosity can be decreased greatly by adding 0.15% RE to aluminum melt. This is the important reason why RE improves the mechanical properties of casting under lost foam casting condition. |
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| Keywords: | RE master alloy aluminum alloy structure lost foam casting |
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