【摘要】 对Mg-9Gd-4Y-0.6Zr合金的组织、力学性能、焊接性能和腐蚀性能进行研究。结果表明:该合金是一种高强、耐热、易焊接和耐腐蚀的新型镁稀土合金,在不同温度下其力学性能都明显优于HM31,HK31和WE54的力学性能,在-196,25,250,300和350℃时的抗拉强度分别达到521,370,348,262和150 MPa,其耐热温度可达到350℃,焊接强度系数为0.74;在3.5%NaCl溶液中该合金挤压T5态的室温腐蚀电流仅为AZ91-T5态的1/10和ZK60-T5态的1/23。更多还原

【Abstract】 Microstructures,mechanical properties,weldability and corrosion behaviours of Mg-9Gd-4Y-0.6Zr alloy were investigated.The results show that this alloy is a new type of magnesium-rare earth alloy with high strength,high heat resistance,good weldability and corrosion resistance.The mechanical properties of this alloy at various temperatures are markedly better than those of HM31,HK31 and WE54;tensile strengths at-196,25,250,300 and 350 ℃ are 521,370, 348,262 and 150 MPa,respectively,and it can be used at temperature as high as 350 ℃.The welding strength coefficient is 0.74,and the corrosion current of this alloy with Ext-T5 condition in 3.5% NaCl solution at room temperature is only 1/10 of AZ91-T5 and 1/23 of ZK60-T5.更多还原