铸造2017，Vol.66Issue(3)：286-289,293,5.
冷却速度对ZM5镁合金凝固组织与性能的影响
The Effect of Cooling Rate on Microstructure and Mechanical Properties on ZM5 Magnesium Alloy
刘艳辉 1毛红奎 1刘佩叶 1徐宏1
作者信息
- 1. 中北大学材料科学与工程学院,山西太原030051
- 折叠
摘要
Abstract
The average cooling rate in solidification of sand (including 20 mm thick and 10 mm thick chill),and metal (steel and copper mold) is studied by temperature recorder.Analysis the effect of cooling rate on ZM5 magnesium alloy in cast microstructure,phase composition and mechanical properties,in order to obtain the relationship in the grain size,the tensile strength,hardness and solidification cooling rate.The research indicates that the cooling rate is 2.94 ℃/s in the area under the sand Ⅲ (including 10 mm thick chill) conditions;the cooling rate is 7.88 ℃/s in metal copper cold.The microstructure of ZM5 magnesium alloy is mainly α-Mg,andthe second phase is Mg17Al12.With the continuous increase of cooling rate,magnesium alloy grain is refined,thesecond phase distribution is more diffuse,the hardness,the tensile strength and elongation of the alloy hasimproved markedly.关键词
冷却速度/晶粒尺寸/微观组织/力学性能Key words
cooling rate/grain size/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
刘艳辉,毛红奎,刘佩叶,徐宏..冷却速度对ZM5镁合金凝固组织与性能的影响[J].铸造,2017,66(3):286-289,293,5.
