黑龙江科技学院学报Issue(2)：127-130,4.
热浸镀铝球墨铸铁氩弧重熔工艺
Argon arc remelting process of hot-dip aluminum ductile iron
摘要
Abstract
This paper is aimed at strengthening the wear resistance of hot-dip aluminum coating by subjecting ductile iron to hot dip aluminum treatment with 780℃, followed by TIG remehing. The paper describes the effect of remehing process parameters on the performance of remehing layer and use of scan- ning electron microscopy to observe thermal dip aluminum coating and argon arc remelting layer. The re- sults show that hot-dip aluminized layer treated by argon arc remelting processing shows a structure im- provement from the Al-rich layer and the diffusion layer into the remelting layer and buffer layer. Argon arc remehing process parameters have a greater impact on the crack rate of remehing organization, pene- tration depth, and surface hardness. Increases in remelting current or decreases in arc scanning speed mean the decreases in remehing layer crack rate, and increases in the penetration depth and the hard- ness. With the remelting current of 70 to 120 A, remehing layer and transition layer have a greatest hard- ness up to 8. 430 and 8. 820 GPa. Argon arc remelting treatment allows a significant improvement in the microhardness of hot-dip aluminum coating.关键词
球墨铸铁/热浸镀铝/氩弧重熔/显微组织/工艺Key words
ductile iron/hot dip aluminum (HDA)/argon arc remehing/microstructure/process-ing flow分类
矿业与冶金引用本文复制引用
赵霞,史晓萍,张鹤..热浸镀铝球墨铸铁氩弧重熔工艺[J].黑龙江科技学院学报,2012,(2):127-130,4.基金项目
黑龙江省教育厅科学技术研究项目 （）
