基于同炉合金双试样密度差方法的铝合金熔体含氢量测定研究  

Study on Determination of Hydrogen Content in Aluminum Alloy Melt by Double Specimen Density Difference Method

作　　者：张元见 李大勇[1] ZHANG Yuan-jian;LI Da-yong(School of Materials Science and Chemical Engineering,Harbin University of Science and Technology,Harbin 150040,Heilongjiang,China)

机构地区：[1]哈尔滨理工大学材料科学与化学工程学院,黑龙江哈尔滨150040

出　　处：《铸造》2023年第3期288-288,289-293,共6页Foundry

摘　　要：介绍一种炉前利用同炉熔体同步制备含气(孔)及无气(孔)试样,通过测定其密度检测铝合金熔体含氢量的基本原理和实现方法。含气(孔)和无气(孔)试样分别在减压和常压环境下完成凝固,通过控制环境压力、温度及保压时间获得所需试样;试样密度利用高精度称重系统分别测定其空中和水中质量;最后利用所得含气(孔)及无气(孔)试样密度算得被测熔体含氢量。This paper introduced the basic principle and realization method of measuring the hydrogen content of aluminum alloy melt by measuring the density of gas(hole)and non-gas(hole)samples prepared synchronously by using the same furnace melt.The samples with gas(hole)and without gas(hole)were solidified under reduced pressure and atmospheric pressure respectively,and the required samples were obtained by controlling the ambient pressure,temperature and holding time.The density of the sample in air and water was measured and calculated respectively by a high-precision weighing system.Finally,the hydrogen content of the measured melt was calculated by using the density of the gas(hole)and non-gas(hole)samples.The test proved that the method described in this paper was used to detect the hydrogen content of the aluminum alloy melt before furnace.

关 键 词：铝合金熔体 含氢量 双试样 密度差 

分 类 号：TG115.21[金属学及工艺—物理冶金]