铸造镁合金搅拌摩擦加工工艺及其应用  

Friction Stir Processing Technology and Its Application for Cast Magnesium Alloy

作　　者：邹文兵 张旭亮 潘龙 李蒙 Zou Wenbing;Zhang Xuliang;Pan Long;Li Meng(Xinjiang Technology(Jiangsu)Co.,Ltd.)

机构地区：[1]新江科技(江苏)有限公司

出　　处：《特种铸造及有色合金》2023年第7期992-997,共6页Special Casting & Nonferrous Alloys

摘　　要：针对镁合金舱体铸件缺陷修复合格率低的问题,采用搅拌摩擦加工技术(FrictionStirProcessing,FSP)实现缺陷修复。首先采用ZM5合金试板,研究了单道次FSP、多道次FSP以及TIG填料+多道次搅拌摩擦加工3种工艺对合金试板组织及力学性能的影响。结果表明,对于壁厚为10mm的舱体薄壁缺陷部位,采用针长为8mm,旋转速度为600r/min,前进速度为80mm/min,下压量为1.0~1.5mm,回抽距离为100mm的工艺条件,FSP修复区域的晶粒从120~160μm细化至10~30μm,力学性能显著改善。采用TIG填料+多道次FSP方法修复了某型号镁合金舱体铸件缺陷,铸件无损检测合格,修复部位本体剖切试样抗拉强度达到260.2 MPa,伸长率达到9.8%。Aiming at the low qualification rate of defect repair for magnesium alloy cabin castings,a method of using Friction Stir Processing(FSP)to achieve defect repair was proposed.Firstly,ZM5 alloy test plates were used to investigate the effects of different processes,such as single pass FSP,multi pass FSP,and TIG filler+multi pass friction stir processing,on the microstructure and mechanical properties.The results reveal that for the thin-walled defect parts of the cabin with a wall thickness of 10 mm,taking process parameters such as needle length of 8 mm,rotational speed of 600 r/min,forward speed of 80 mm/min,downward pressure of 1.0 to 1.5 mm,and extraction distance of 100 mm,the grains in the FSP repair area are refined from 120~160μm to 10~30μm,improving mechanical properties significantly.The defect of a certain type of magnesium alloy cabin castings was repaired using the TIG filler+multi-pass FSP method,and the non-destructive testing was qualified.The tensile strength of the sectioned specimen at the repaired part reaches 260.2 MPa,and the elongation reaches 9.8%.

关 键 词：ZM5镁合金 搅拌摩擦加工 缺陷修复 

分 类 号：TG453[金属学及工艺—焊接] TG146.22[一般工业技术—材料科学与工程]