EFFECT OF Al-Ti-B ON MAGNESIUM ALLOY MICRO-ALLOYED WITH Ca

摘要：

Effect of Al-Ti-B master alloy on the microstructure and mechanical properties was investigated in AZ31 magnesium alloys micro-alloyed with Ca. During the casting process, electromagnetic field was also introduced. The results suggest that the micro addition of Ca to magnesium alloy retards the oxidation rate during melting process, improves casting qualities of magnesium alloy ingots. The grain size of AZ31 magnesium alloy has been effectively reduced by optimum addition of 1 wt.％ (designed composition) Al-Ti-B master alloy. In this process, the addition level of Ti is the key factor to affect grain size of magnesium alloy, in which two grain refinement mechanisms are built by both TiB2 and residual Ti. Moreover, the electromagnetic field leads to uniform distribution of temperature field and solute field in the molten pool, increases casting qualities and refines grain size further.

关键词： Magnesium alloy Al-Ti-B electromagnetic field Ca microstructure mechanical properties

作者: CANFENG FANG GUOHONG QI XINGGUO ZHANG HAI HAO JUNZE JIN

作者单位: School of Materials Science and Engineering, Dalian University of Technology, Linggong Road 2＃, Dalian, Liaoning 116023, China

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 888-893

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）