Yb含量对ZL101合金微观组织及耐腐蚀性能的影响  

Effect of Yb Content on Microstructure and Corrosion Resistance of ZL101 Alloy

作　　者：樊巧芳 林浩 FAN Qiaofang;LIN Hao(Jiangsu College of Safety Technology,Xuzhou 221011,Jiangsu,China;Institute of Metals Research,Chinese Academy of Sciences,Shenyang 110000,Liaoning,China)

机构地区：[1]江苏安全技术职业学院,江苏徐州221011 [2]中国科学院金属研究所,辽宁沈阳110000

出　　处：《矿冶工程》2025年第1期143-147,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51975277);江苏省高职院校工程技术研究开发中心(安全应急装备)(苏教科函[2023]11号)。

摘　　要：在机械搅拌铸造工艺下加入质量分数0~0.9%的稀土Yb对ZL101合金进行变质处理,研究Yb加入量对ZL101合金微观组织及耐腐蚀性能的影响。结果表明,Yb质量分数0.6%时,ZL101合金α-Al相由未变质处理的粗大树枝晶状结构转变成尺寸细小、形态规则的球状枝晶,且合金共晶Si相由粗大的长条状和针片状转变成颗粒状和短棒状。Yb与Al基体反应生成Al_(3)Yb稀土相,呈现长条状结构。添加0.6%Yb的ZL101合金腐蚀速率为13.25 mg/(cm^(2)·d),比未添加Yb的合金腐蚀速率降低了37.23%。观察腐蚀表面形貌可知,随着Yb加入量增多,合金腐蚀表面腐蚀产物及腐蚀凹坑数量逐渐减少。ZL101 alloy was modified by using mechanical stir casting process with an addition of rare-earth Yb at the mass fraction of 0-0.9%,for investigating the effect of Yb content on the microstructure and corrosion resistance of ZL101 alloy.The results show that with the addition of rare-earth Yb at a mass fraction of 0.6%,ZL101 alloy has itsα-Al phase changed from coarse dendritic structure without modification to spheroidal dendrite with fine size,regular shape and regular arrangement,also the eutectic Si phase changed from the coarse long strip and needle sheet to the granular and short rod.It is shown that Yb reacts with Al substrate to form Al_(3)Yb rare-earth phase with long strip structure.With the addition of Yb at 0.6%,ZL101 alloy has its corrosion rate at 13.25 mg/(cm^(2)·d),37.23%lower than that before the addition of Yb.It can be seen from the corrosion surface observation that increasing Yb content leads to gradual decrease in the number of corrosion products and pits on the corrosion surface of the alloy.

关 键 词：变质处理 稀土 镱(Yb) 掺杂 ZL101合金 微观组织 腐蚀性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]