摘要
报道喷雾沉积高硅ZA27合金的组织和高温性能.采用环缝式雾化器,氮气雾化,钢基底水平单向运动.合金成分为标准ZA27中添加4%Si和0.3%Fe,喷雾沉积组织由孔洞(2—4%)富硅相(30—40%)和基体构成.富硅相呈球状弥散均匀分布.时效之前,喷雾沉积与常规铸造高硅ZA27合金的显微硬度和高温(150℃)硬度没有明显差别,长期时效之后,喷雾沉积合金的上述性能明显高于常规铸造合金.喷雾沉积与合金化相结合是改善ZA27合金高温性能的有效途径.
The microstructure and high-temperature properties of ZA27 alloy containing 4% Si and 0.3 % Fe produced by spray deposition are investigated. The microstructure of the alloy was made up of porosity(2% 4%), spheroial and uniform silicon-riched phases(30% 40%) and three kinds of substrate. The micro-hardness(HV) and high-temperature hardness(HB) of the alloy produced by spray deposition or conventional casting process make no difference before aging, but all the above properties is greatly improved by spray deposition after aging.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第6期A254-A260,共7页
Acta Metallurgica Sinica
基金
国家教育委员会博士点基金
关键词
喷雾沉积
锌基合金
硬度
显微组织
spray deposition, zinc-base alloy, microstructure, hardness