喷射沉积ZA35合金组织与耐蚀性  

Microstructure and corrosion resistance of spray deposition ZA35 Alloy

作　　者：刘敬福[1] 李荣德[1] 吴德枫[2] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110023 [2]辽宁工程技术大学材料科学与工程系,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2007年第5期754-756,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50275098);辽宁省科技厅科技攻关重大项目(20060385-311);沈阳市科技局资助项目(20060726)

摘　　要：采用喷射沉积技术制备ZA35合金沉积坯,并对沉积坯进行固态热挤压制备ZA35合金。对此种方法制备的合金进行抗拉强度与耐蚀性检测,分析了喷射沉积对ZA35力学性能与耐蚀性的影响。试验表明:喷射沉积与热挤压制备的ZA35合金抗拉强度优于金属型铸造ZA35合金,采用喷射沉积与挤压制备的合金组织均匀,晶粒细小,断口观察发现随拉伸温度升高喷射沉积合金的断裂表现为穿晶断裂,韧性提高。在KOH介质中,喷射沉积ZA35合金与铸态ZA35合金相比,自腐蚀电位变正,腐蚀电流减小,耐蚀性增强。Porosity is a great disadvantage for the mechanical properties. As a result, the porous performs must be further densified and deformed plastically. We have produced ZA35 alloy by means of spray deposition and then the alloy has been further densified by extruding. The tensile strength and corrosion resistance are studied in this article. The result shows that the mechanicical properties made by spray deposition is better than foundry,the structure is homogeneous and the crystal grain is fine by means of scan electron microscope. The fracture pattern is similar to transcrystalline cracking.In KOH,the corrosion resistance of spray deposition ZA35 alloy is better than that of cast ZA35 alloy.

关 键 词：喷射沉积 抗拉强度 耐蚀 ZA35合金 

分 类 号：TG146.1[一般工业技术—材料科学与工程]