交变磁场-分级加压压差对真空差压铸造ZL205A合金晶粒尺寸的影响  

Effects of Alternating Magnetic Field-grading Pressure Difference on grain Size of Vacuum Counter-pressure Casting ZL205A Alloy

作　　者：黄朋朋 芦刚 严青松 郑强强 晏玉平 Huang Pengpeng;Lu Gang;Yan Qingsong;Zheng Qiangqiang;Yan Yuping(National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University)

机构地区：[1]南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌330063

出　　处：《特种铸造及有色合金》2020年第1期92-95,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51861027);江西省优势科技创新团队重点资助项目(20181BCB19001)。

摘　　要：在真空差压分级加压铸造ZL205A铝合金过程中施加交变磁场,研究交变磁场-真空差压分级加压协同场作用对ZL205A铝合金晶粒尺寸的影响。结果表明,在分级加压压差不变的条件下,随着交变磁感应强度增加,铝合金晶粒细化程度先增大后减小;随着分级加压压差增大,当交变磁感应强度小于20mT时,协同场作用下铝合金晶粒显著细化,当交变磁感应强度大于20mT时,协同场作用下铝合金晶粒粗大。在交变磁感应强度为20mT,分级加压压差为130kPa条件下,ZL205A铝合金晶粒细化效果最佳。The alternating magnetic field was applied on ZL205 Aalloy during the vacuum counter-pressure graded pressure casting to understand effects of alternating magnetic field-grading pressure synergistic field on the grain size of ZL205 Aalloy.The results show that under the condition of constant pressure difference of graded pressure,with the increase of the alternating magnetic field intensity,the grain size of aluminum alloy is increased firstly and then decreased.With the increase of the grading pressure difference,when the alternating magnetic field intensity is less than 20 mT,the grain size of the aluminum alloy is refined remarkably under the action of the synergistic field.With the alternating magnetic field strength morer than 20 mT,the grain size of the aluminum alloy is coarsened under the action of the synergistic field.ZL205 Aalloy presents the desirable grain refining effect under the condition of alternating magnetic field intensity of 20 mT and graded pressure difference of 130 kPa.

关 键 词：交变磁场 真空差压铸造 分级加压压差 晶粒尺寸 

分 类 号：TG249.2[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]