Microstructures and properties of reciprocating extruded as-cast ZK60 magnesium alloy

来源期刊:中国有色金属学报(英文版)2007年增刊第1期

论文作者:姜婷 郭学锋 马光

文章页码:396 - 399

Key words:reciprocating extrusion; magnesium alloys; ZK60; dynamic recrystallization

Abstract: As-cast d 50 mm ZK60 magnesium alloys were reciprocating extruded for different passes under (335±5)℃. The microstructures and properties of the alloys were studied under different reciprocating extrusion passes. The results show that, reciprocating extruded microstructures were refined and uniformed effectively, in compared with as-cast condition. For 2 passes, the grain size is about 7 μm. After 4 passes, the grain size is about 6 μm. During reciprocating extrusion, refined as-cast eutectic and reinforcement phases in dispersed particles are uniformly distributed on matrix, and their size is less than 50 nm. The tensile strength, yield strength and the elongation of 4 passes reciprocating extruded as-cast ZK60 magnesium alloy are 311 MPa, 214 MPa and 17.93%, respectively. The thermal expansion coefficient of RE-4-EX-ZK60-CT magnesium alloy is the lowest. More or less extrusion passes can not decrease the value of the thermal expansion coefficient.

基金信息:the National Natural Science Foundation of China
the Natural Scientific Research program of Shaanxi Province China

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