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热浸镀锌钢件镀锌层厚度测定的不确定度评定 被引量:3
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作者 冯健 孙丽娟 《农业开发与装备》 2015年第4期52 88-,共2页
热浸镀锌钢件在大型喷灌机中广泛应用,其镀锌厚度直接影响喷灌机结构件的抗侵蚀能力。本文依据GB/T 13912-2002《金属覆盖层钢铁制件热浸镀锌层技术要求及试验方法》中磁性法测定热浸镀锌钢件镀锌层厚度,独立进行12次重复试验,从测量重... 热浸镀锌钢件在大型喷灌机中广泛应用,其镀锌厚度直接影响喷灌机结构件的抗侵蚀能力。本文依据GB/T 13912-2002《金属覆盖层钢铁制件热浸镀锌层技术要求及试验方法》中磁性法测定热浸镀锌钢件镀锌层厚度,独立进行12次重复试验,从测量重复性、仪器示值误差、镀锌层厚度测量值数据修约三个主要方面进行测量不确定度的分析评定,确定影响镀锌层厚度结果测量不确定度的主要来源。 展开更多
关键词 磁性法 热浸镀锌钢件 层厚度 不确定度评定
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镀锌钢件成型非金属复合材料黑变分析及防护措施
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作者 石章靖 姚金莉 李俊菊 《航天制造技术》 2021年第6期48-51,共4页
某含镀锌钢件组件产品在成型非金属复合材料时,钢件外露部分发生黑变现象。通过对黑变原因进行理论分析及试验验证,得出在高温和水存在的环境下,镀锌钝化层中的Cr^(6+)和甲醛及水反应,生成Cr^(3+)(H_(2)O)_(6)水合铬离子,使产品表观呈... 某含镀锌钢件组件产品在成型非金属复合材料时,钢件外露部分发生黑变现象。通过对黑变原因进行理论分析及试验验证,得出在高温和水存在的环境下,镀锌钝化层中的Cr^(6+)和甲醛及水反应,生成Cr^(3+)(H_(2)O)_(6)水合铬离子,使产品表观呈现黑色。采用铝基胶带及亚敏胶带等使产品隔绝外界气体,避免镀锌钢件发生反应,并通过试验验证。为类似镀锌钢件组件在成型非金属复合材料时避免黑变提供了一种理论分析方向及防护保障措施。 展开更多
关键词 镀锌钢件 黑变 防护措施
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Effect of the Chord-Brace Angle on the Strength of Rectangular Hollow Sections K- and N-Joints in Galvanized Structures 被引量:1
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作者 Miguel A. Serrano Carlos Lopez-Colina +1 位作者 Gorka Iglesias Jorge Gonzailez 《Journal of Civil Engineering and Architecture》 2014年第10期1226-1232,共7页
An important consideration when using hot-dip galvanized tubular structures is the uncertainty of the joint behaviour due to the possible reduction in the global joint resistance produced by the vent holes required fo... An important consideration when using hot-dip galvanized tubular structures is the uncertainty of the joint behaviour due to the possible reduction in the global joint resistance produced by the vent holes required for the galvanizing process. This paper assesses the effect on the joint strength of the angle between the brace members and the chord in a K- or N-joints made with rectangular hollow sections. The study is focused on the case when those brace members include characteristic holes required for the hot-dip galvanizing process. To accomplish the objective of the proposed work, some tests on full-scale K- and N-joints, including angles of 35°, 45°, 55° and 90°, were carried out. The experimental work was complemented by a validated numerical simulation in order to give some design recommendations and to extend the research to other joint configurations. 展开更多
关键词 Structural joints tubular structures galvanized structures experimental tests numerical simulation.
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