基于智能控制的铸造ZM5镁合金组织与性能研究
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摘要
对ZM5镁合金分别进行了重力铸造和基于智能控制的真空调压铸造试验,且进行了两种铸造方式的镁合金组织、腐蚀性能及磨损性能的测试与分析。结果表明:与重力铸造相比,基于智能控制的真空调压铸造试样的平均晶粒尺寸减小了28μm(从62μm到34μm),晶粒细化;腐蚀电位正移了127 mV(从-0.932V到-0.805V);经20 min磨损后,磨损体积为19×10~(-3) mm~3,较重力铸造的镁合金试样(38×10~(-3) mm~3)减少了50%。采用基于智能控制的真空调压铸造可明显细化ZM5镁合金晶粒,提高耐腐蚀性能和耐磨损性能。
The experiments of ZM5 magnesium alloy were done by gravity casting and vacuum pressure regulating casting based on intelligent control, respectively. The microstructure, corrosion resistance and wear resistance of magnesium alloy cast by the two casting methods were tested and analyzed. The results show that compared with gravity casting, the average grain size of the vacuum pressure-regulated casting sample based on intelligent control is reduced by28 μm(from 62 μm to 34 μm), and the grain size is fine, the corrosion potential shifts by 127 m V(from-0.932 V to-0.805 V). After 20 min wear, the wear volume is 19 ×10~(-3) mm~3, which is reduced by 50% compared with that of the gravity cast magnesium alloy sample(38 ×10~(-3) mm~3). The grain size of ZM5 magnesium alloy can be refined and the corrosion resistance and wear resistance of ZM5 magnesium alloy can be improved by vacuum controlled pressure casting based on intelligent control.
The experiments of ZM5 magnesium alloy were done by gravity casting and vacuum pressure regulating casting based on intelligent control, respectively. The microstructure, corrosion resistance and wear resistance of magnesium alloy cast by the two casting methods were tested and analyzed. The results show that compared with gravity casting, the average grain size of the vacuum pressure-regulated casting sample based on intelligent control is reduced by28 μm(from 62 μm to 34 μm), and the grain size is fine, the corrosion potential shifts by 127 m V(from-0.932 V to-0.805 V). After 20 min wear, the wear volume is 19 ×10~(-3) mm~3, which is reduced by 50% compared with that of the gravity cast magnesium alloy sample(38 ×10~(-3) mm~3). The grain size of ZM5 magnesium alloy can be refined and the corrosion resistance and wear resistance of ZM5 magnesium alloy can be improved by vacuum controlled pressure casting based on intelligent control.
引文
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[5]张宇辉,高德民,华勤,等.铸造镁合金的应用与研究进展[J].铸造技术,2005,26(5):423-425.
[6]申泽骥,李玉胜,冯志军,等.新型铸造镁合金开发现状[J].铸造,2003,52(3):153-156.
[7]王飞.低压铸造智能控制系统的研究[D].北京:北京工商大学,2008.
[8]严青松,余欢,魏伯康,等.智能控制真空差压铸造铝合金铸件组织和性能的研究[J].铸造技术,2006(7):748-752.
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