摘要
铝镁合金铸件极易产生针孔、显微缩松等缺陷,氢的存在是产生这些缺陷的主要原因。铝镁合金熔体中含氢量检测是铝镁合金熔体除气效果以及铝镁合金熔体质量是否合格的重要检验手段,对提高铸件质量具有非常重要的意义。随着铝镁合金应用范围和用量的日益增加,冶金和铸造工作者对铝镁合金熔体含氢量定量快速检测技术的发展愈加关注。从铝镁合金熔体含氢量定量测试原理和基于这些原理开发的测试仪器的特点出发,对当前比较流行的几种铝镁合金熔体含氢量定量快速检测技术进行比较、分析和评价,包括以Sievert定律为基础的惰性气体循环法、电化学法和吸气测压法以及以声发射原理为基础的测氢方法,在此基础上指出今后以提高测试速度和降低测试成本为主攻方向的铝镁合金熔体定量快速检测技术具有广阔的发展前景。
Pinhole and micro-shrinkage are the ordinary defects founded in the aluminum and magnesium alloy castings, the existence of hydrogen is the main reason for these defaults. So the measurement of hydrogen in aluminum and magnesium alloy melt is an important means to test the degassing effect and to ensure the quality of the melt, and it is significant to improve the casting＇s quality. With the increasing application of aluminum and magnesium alloy, the development of quantitative and rapid measurement of hydrogen in aluminum and magnesium alloy melt gets more attractive to the metallurgists and foundrymen. The principles, instruments and features of several popular measurement techniques, such as inert gas circulation method, electrochemical method, pressure evaluation method based on Sieviet＇s law and the method based on acoustic emission, are analyzed and evaluate respectly. It is indicated that those measurement techniques taking high testing speed and low testing cost as main characteristics have a great prospect.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2013年第20期36-41,共6页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(51174067)
关键词
铝镁合金熔体
含氢量
定量检测
Aluminum and magnesium alloy melt Hydrogen content Quantitative measurement
