首页|Ca含量和流变挤压铸造工艺参数对AZ91-1Ce-xCa合金显微组织和力学性能的影响

Ca含量和流变挤压铸造工艺参数对AZ91-1Ce-xCa合金显微组织和力学性能的影响

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首先,研究不同Ca含量AZ91-1Ce合金的显微组织、力学性能和阻燃性能,优化出最佳Ca含量.然后,系统研究流变挤压铸造工艺参数(包括压力和转速)对AZ91-1Ce-2Ca合金显微组织和力学性能的影响.结果表明,随着Ca含量的增加,AZ91-1Ce-xCa合金的显微组织细化,阻燃性能提高.但当Ca含量超过1％(质量分数)时,随着Ca含量的增加,AZ91-1Ce-xCa合金的力学性能迅速降低.在流变挤压铸造工艺中,压力和转速增加使AZ91-1Ce-2Ca合金的组织明显细化,气孔率降低,力学性能提高.与常规铸造相比,添加2％Ca(质量分数)的AZ91-1Ce合金经流变挤压铸造成形后,不仅保证合金的抗氧化性(801℃),而且提高其力学性能.
Effect of Ca content and rheo-squeeze casting parameters on microstructure and mechanical properties of AZ91-1Ce-xCa alloys
The microstructure, mechanical properties and flame resistance behavior of the AZ91-1Ce alloys with different Ca additions were firstly investigated. Then, the effect of processing parameters, including applied pressures and rotation speeds, on the microstructure and mechanical properties of the rheo-squeeze casting AZ91-1Ce-2Ca alloy was studied. The results indicate that with the increase of Ca content, the microstructure is refined and the flame resistance of the AZ91-1Ce-xCa alloys increases. But when the Ca content exceeds 1 wt.％, with the Ca content increasing, the mechanical properties of the AZ91-1Ce-xCa alloys reduce rapidly. For rheo-squeeze casting process, the increase of applied pressure and rotation speed can both bring about significant refinement in the microstructure of the AZ91-1Ce-2Ca alloy and reduction of the porosity, so the mechanical properties increase. Compared to conventional casting, the AZ91-1Ce alloy with the addition of 2 wt.％Ca by rheo-squeeze casting not only guarantees the oxidation resistance (801 ℃), but also improves mechanical properties.

CaAZ91-1Ce alloyoxidation resistancerheo-squeeze casting

肖然、刘文才、吴国华、张亮、刘保良、丁文江

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上海交通大学 材料科学与工程学院轻合金精密成型国家工程中心和金属基复合材料国家重点实验室,上海 200240

Ca AZ91-1Ce合金 阻燃 流变挤压

authors are grateful for the financial supports from National Natural Science Foundation of Chinaauthors are grateful for the financial supports from National Natural Science Foundation of Chinaauthors are grateful for the financial supports from National Natural Science Foundation of ChinaResearch Program of Joint Research Center of Advanced Spaceflight Technologies,China

5177533451771115U2037601USCAST2020-14

2021

10.1016/S1003-6326(21)65599-1

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(6)
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