Stamping Formability of ZE10 Magnesium Alloy Sheets
来源期刊：JOURNAL OF RARE EARTHS2007年第4期
论文作者：Li Yuanyuan Liu Ying Li Wei
Key words：ZE10 magnesium alloy; conical cup value; bore expanding performance; limit drawing ratio; rare earths;
Abstract: ZE10 magnesium alloy sheets were prepared through ingot casting and the hot-rolling process. The mechanical properties, conical cup value (CCV), bore expanding performance, and limit drawing ratio (LDR) were investigated to examine the stamping formability of ZE10 alloy sheets, at temperatures ranging from 20 to 300 ℃. The results showed that the tensile strength decreased, whereas, plasticity, drawing-bulging performance, bore expanding properties, and deep drawing performance increased markedly at elevated temperatures. The CCV specimens could be drawn into the conical die's underside cylindrical hole from the conical cliff, without cracking, and could have the minimum CCV at 200 and 250 ℃. In the bore-expanding test, the bore (Φ10 mm) could be expanded to the dimension of the punch (Φ25 mm) and the maximum bore-expanding ratio could be achieved at above 150 ℃. The limiting drawing ratio (LDR) of 2.85 is acquired during the deep drawing test at 230 ℃ with the punch temperature of 20～ 50 ℃, the punch velocity of 50 mm·min-1, and the mixture of graphite and cylinder grease as lubricant.
Li Yuanyuan1，Liu Ying2，Li Wei2
(1.Key Laboratory for Advanced Metallic Materials Processing and Forming of Guangdong, South China University of Technology, Guangzhou 510640, China;
2.Department of Material Science and Engineering, Jinan University, Guangzhou 510632, China)
Abstract:ZE10 magnesium alloy sheets were prepared through ingot casting and the hot-rolling process. The mechanical properties, conical cup value (CCV), bore expanding performance, and limit drawing ratio (LDR) were investigated to examine the stamping formability of ZE10 alloy sheets, at temperatures ranging from 20 to 300 ℃. The results showed that the tensile strength decreased, whereas, plasticity, drawing-bulging performance, bore expanding properties, and deep drawing performance increased markedly at elevated temperatures. The CCV specimens could be drawn into the conical die''s underside cylindrical hole from the conical cliff, without cracking, and could have the minimum CCV at 200 and 250 ℃. In the bore-expanding test, the bore (Φ10 mm) could be expanded to the dimension of the punch (Φ25 mm) and the maximum bore-expanding ratio could be achieved at above 150 ℃. The limiting drawing ratio (LDR) of 2.85 is acquired during the deep drawing test at 230 ℃ with the punch temperature of 20～ 50 ℃, the punch velocity of 50 mm·min-1, and the mixture of graphite and cylinder grease as lubricant.
Key words:ZE10 magnesium alloy; conical cup value; bore expanding performance; limit drawing ratio; rare earths;
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