摘要
采用一种新的自孕育法制备2024变形铝合金半固态浆料，研究了熔体处理温度对2024变形铝合金水淬组织和铸态组织的影响。结果表明，熔体处理温度过低和过高时，组织平均晶粒尺寸较大。在700～730℃范围内时，晶粒平均尺寸较小，约为27．1～32．2μm。从浇注过程的温度变化曲线上可以看出，随着熔体处理温度的增加，孕育剂和冷却槽对熔体的冷却效果增强。合金熔体在孕育剂的激冷作用下，瞬间产生大量晶核，并在流经多流股混合冷却槽时，发生晶粒的游离和增殖，最终细化组织。
Semisolid slurry of 2024 wrought aluminum alloy was prepared by a new self-inoculation method （SIM） . The effect of melt treatment temperature on semi-solid slurry was investigated. The results show that the average grain size is larger when the melt treatment temperature is excessively low or high. The grain size is 27.1-32.2μ m when the melt treatment temperature is in the range of 700-730 ℃. According to the temperature variation curve, the cooling effect enhanced with the increasing of melt treatment temperature. A large number of crystal nuclei were formed in the 2024 melt under the chilling action of the self-inoculants. The liberation and proliferation of the grains occur when the melt flows through the multi-stream mixed cooling channel, which resulted in the refinement of the structures.
出处
《铸造》
CAS
CSCD
北大核心
2012年第4期389-395,共7页
Foundry
基金
国家自然科学基金项目(50964010)
关键词
自孕育法
2024变形铝合金
半固态浆料
熔体处理温度
凝固过程
self-inoculation method
2024 wrought aluminum alloy
semisolid slurry
melt treatmenttemperature
solidification process
