立式双辊铸轧镁合金薄带微观组织分析

王广山; 邸洪双; 黄峰

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立式双辊铸轧镁合金薄带微观组织分析
Microstructure of Vertical Twin-rolling Casting Magnesium Alloy
2009年29卷第9期页码：792-794
纸质出版日期： 2009 ，
DOI：

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[1]王广山,邸洪双,黄峰.立式双辊铸轧镁合金薄带微观组织分析[J].特种铸造及有色合金,2009,29(09):792-794+777.

Wang Guangshan, Di Hongshuang, Huang Feng. Microstructure of Vertical Twin-rolling Casting Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2009,29(9):792-794.
[1]王广山,邸洪双,黄峰.立式双辊铸轧镁合金薄带微观组织分析[J].特种铸造及有色合金,2009,29(09):792-794+777. DOI：

Wang Guangshan, Di Hongshuang, Huang Feng. Microstructure of Vertical Twin-rolling Casting Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2009,29(9):792-794. DOI：

摘要

在实验室的立式双辊铸机上进行了AZ31B镁合金薄带的铸轧试验。研究了不同工艺下铸轧薄带微观组织

并对不同冷却方式下铸轧镁合金薄带微观组织进行了分析。结果表明

双辊铸轧镁合金晶粒细小、无共析现象发生。铸轧速度对板带的显微组织影响显著

当铸轧速度达到20m/min时

镁合金薄带组织为理想等轴晶。对铸轧态镁合金薄带进行油冷

既防止了薄带表面氧化

又阻止了冷却过程晶粒长大。

Abstract

AZ31B magnesium alloy strip was cast-rolled by experimental vertical twin-roll caster to understand the microstructure of the twin-rolling casting strip. The microstructure of the casting-rolling magnesium alloy strip was observed in condition of varied processing parameters and different cooling rates. The results reveal that fine grain in microstructure of twin-rolled magnesium alloy can be observed in the absence of eutectoid composition. Microstructure of the rolling-casting magnesium alloy strip is closely related to the rolling velocity

where desirable equiaxed crystal can be exhibited in the magnesium alloy strip with rolling at 20 m/min. Surface oxidation on the as-cast strip can be eliminated and the grain growth can be restrained by quenching the strip in oil.