两相区铸造制备ZK60-2Ca半固态坯料的部分重熔组织

曹婧; 乐启炽; 张志强; 宝磊; 崔建忠; 阳波

doi:10.15980/j.tzzz.2013.09.013

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两相区铸造制备ZK60-2Ca半固态坯料的部分重熔组织
Partially Remelting Microstructures of ZK60-2Ca SSM Ingot Prepared by Two-Phase Region Casting
2013年33卷第9期页码：815-819
纸质出版日期： 2013 ，
DOI： 10.15980/j.tzzz.2013.09.013

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[1]曹婧,乐启炽,张志强,宝磊,崔建忠,阳波.两相区铸造制备ZK60-2Ca半固态坯料的部分重熔组织[J].特种铸造及有色合金,2013,33(09):815-819.

Cao Jing, Le Qichi, Zhang Zhiqiang, et al. Partially Remelting Microstructures of ZK60-2Ca SSM Ingot Prepared by Two-Phase Region Casting[J]. Special Casting & Nonferrous Alloys, 2013,33(9):815-819.
[1]曹婧,乐启炽,张志强,宝磊,崔建忠,阳波.两相区铸造制备ZK60-2Ca半固态坯料的部分重熔组织[J].特种铸造及有色合金,2013,33(09):815-819. DOI： 10.15980/j.tzzz.2013.09.013.

Cao Jing, Le Qichi, Zhang Zhiqiang, et al. Partially Remelting Microstructures of ZK60-2Ca SSM Ingot Prepared by Two-Phase Region Casting[J]. Special Casting & Nonferrous Alloys, 2013,33(9):815-819. DOI： 10.15980/j.tzzz.2013.09.013.

摘要

为了使坯料获得既细小又圆整的晶粒组织

采用两相区铸造法制备了ZK60-2Ca镁合金半固态坯料

并利用电阻炉加热进行部分重熔。结果表明

适当控制加热温度和保温时间

坯料部分重熔时可获良好的触变结构。水冷铜型浇注时

在610℃下保温10

5min时可获得较理想的触变结构

晶粒尺寸达32.36μm

圆整度达1.68;石墨型浇注时

其晶粒平均直径为33.61μm

圆整度达1.47。适当降低铸造冷却速率

即采用石墨型

能提高二次重熔组织的均匀性和稳定性。

Abstract

To obtain billet with small and spherical grain structure

the ingot of ZK60-2Ca magnesium alloy was prepared by two-phase region casting

and then the ingot was partially remelting by electric resistance furnace.The results indicate that desirable thixotropic microstructure in the ingot prepared can be obtained by proper controlling remelting temperature and holding time.Using the water-cooled copper mould

desirable thixotropic microstructure can be obtained at 610℃ for 10

5min

where the average diameter of grain reaches 32.36μm and the roundness is 1.68.With the graphite mould

the average grain diameter is 33.61μm and the roundness reaches 1.47.Meanwhile

the cooling rates during casting also affect the partial remelting progress.Through reducing the cooling rate properly

the uniformity and stability of the partial remelting microstructure are improved.