Interactive Effects of Cooling Rate and Hydrogen Content on Refinement of AlSi25 Alloy

Hu Lina  Bian Xiufang  Duan Youfeng

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Interactive Effects of Cooling Rate and Hydrogen Content on Refinement of AlSi25 Alloy
Issue 2, Pages: 4-6(2003)
Published： 2003 ，
DOI：

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[1]胡丽娜,,,,,,,,,,边秀房,,,,,,,,,,段佑锋.冷却速度与氢含量对AlSi25合金细化的影响[J].特种铸造及有色合金,2003(02):4-6+3.

Hu Lina Bian Xiufang Duan Youfeng. Interactive Effects of Cooling Rate and Hydrogen Content on Refinement of AlSi25 Alloy. [J]. Special Casting & Nonferrous Alloys (2):4-6(2003)
[1]胡丽娜,,,,,,,,,,边秀房,,,,,,,,,,段佑锋.冷却速度与氢含量对AlSi25合金细化的影响[J].特种铸造及有色合金,2003(02):4-6+3. DOI：

Hu Lina Bian Xiufang Duan Youfeng. Interactive Effects of Cooling Rate and Hydrogen Content on Refinement of AlSi25 Alloy. [J]. Special Casting & Nonferrous Alloys (2):4-6(2003) DOI：

摘要

通过HYSCANⅡ测氢仪和阶梯试样研究了冷却速度和氢的含量对过共晶铝硅合金细化效果的影响。结果表明

熔体中氢的含量和冷却速度对初晶硅的细化效果的影响是相互促进的过程。砂型铸造中

当每 10 0g熔体的氢含量小于0 .2mL

试样厚度小于 5 0mm（冷却速度约为 0 .14 4K/s）时

初晶硅细化效果不受含氢量与冷却速度的影响

细化效果稳定

平均粒度大约为 18μm

Abstract

The interactive effects of cooling rate and hydrogen content on refinement of primary silicon in hypereutectic Al Si alloy were studied by HYSCANⅡ hydrogen tester and multi stepped specimens. The results showed that both hydrogen content in melt and cooling rate exhibited mutually stimulative interactive effects on refinement of the primary silicon. Refinement effects on primary silicon were stable and independent on hydrogen content and cooling rate with less than 0.2 mL/100 g and 0.144 k/s （equivalent to 50 mm thickness of the specimens） in sand casting respectively. Average size of the primary silicon is approximately 18 μm.