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Jianzhu Gangjiegou Jinzhan为高强钢在低温环境下的应用提供试验数据和建议，本文重点围绕焊接热输入和接头母材的不同交货状态这两个关键影响因素，选取控轧控冷（TMCP）和调质（QT）两种交货状态的20 mm厚Q550D和Q690D高强钢，分别进行1.0 kJ·mm-1、1.5 kJ·mm-1和1.9 kJ·mm-1三种常见的气保焊焊接热输入的接头制备、韧性试验检测和对比分析，进行了不同交货状态下对接接头的母材、焊缝区和热影响区（HAZ）的夏比冲击功及其变化规律，以及韧脆转变温度的研究。结果表明 ...
崔强 +5 more
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Quality control and safety management of oil and gas pipelines during its whole life cycle [PDF]
, 2023 The development history and technical change of oil and gas pipeline quality management in China were reviewed focusing on pipeline quality control in the whole life cycle, on the basis of quality improvement of oil and gas pipelines in the construction ...
Changliang JIANG
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Influence of Ti-rare earth addition on microstructure and toughness of coarse grain heat-affected zone in C-Mn steel [PDF]
, 2017 The influences of rare earth (RE) and Ti-RE complex treatment on the microstructures and toughness in the coarse grain heat-affected zone (CGHAZ) of C-Mn steel were investigated using a Gleeble-1500D thermal simulator with input heat energy of 65 kJ·
GAO Qi-rui +3 more
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In-situ observations of grain refinement by TiN particles in the simulated coarse-grained heat-affected zone of a high-strength low-alloy steel [PDF]
, 2016 The effect of grain refinement by TiN particles in the simulated coarse-grained heat-affected zone of a high-strength low-alloy steel was investigated by means of analytical characterization techniques such as in-situ microscopy and electron back ...
LI Guang-qiang +2 more
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Effect of heat input on the microstructure and mechanical properties of TIG welded-brazed magnesium / steel joints [PDF]
, 2016 A tungsten inert gas(TIG) welding-brazing technology using an Mg-based filler was developed for joining Mg alloys to steel. The effects of heat input on the microstructure and mechanical properties of Mg/steel joints were investigated.
HONG Miao, LIANG Xue-bo, YUAN Xin-jian
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Jianzhu Gangjiegou Jinzhan, 2023 外墙保温性能是制约装配式钢结构建筑推广应用的关键问题之一，目前对于钢结构外围护体系热工性能的研究还不充分，尚无关于我国严寒地区钢结构框架-ALC外墙传热机理和热桥效应的相关研究。针对严寒地区气候特点和建筑节能要求，基于ABAQUS软件，开展了钢结构框架-ALC外墙的传热性能有限元分析，揭示了钢梁、钢管混凝土柱以及梁柱节点等对墙体热工性能的影响机理，分析了保温体系类型、保温层热阻、ALC墙板热阻、钢梁连接件类型、框架柱截面形式、有无楼板等对墙体平均传热系数、热桥效应和内表面温度的影响。结果表明 ...
张相勇 +5 more
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Dizhen xuebao, 2018 一次特大地震会对震中及附近区域热辐射背景场造成较大影响。应用中国静止气象卫星风云二号系列（FY-2C/2E/2F/2G）的亮温资料，通过时频相对功率谱法对2007—2016年（30°N—45°N，135°E—150°E）范围的时频数据进行全时空全频段扫描，得到了2011年3月11日日本MW9.1特大地震的热辐射异常，该异常特征明显且与地震发震构造对应较好。应用时频分析方法分析MW9.1地震对上述扫描区域热辐射背景场的影响，得出2011年的热辐射异常出现时间长、范围大且与其它年份不同 ...
Congxin Wei, Yuansheng Zhang, Ying Wang
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Influence of tempering times on the mechanical properties of P91 weld joints [PDF]
, 2017 The P91 weld joint used in the experiment is re-tempered according to the heat treatment process. The effect of tempering times on its mechanical properties, including that at room temperature and high temperature, was then investigated in relation to ...
CUI Zheng +5 more
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Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines [PDF]
, 2023 In view of the incomplete fusion occurred in the automatic girth welding of oil and gas pipelines, the factors influencing the incomplete fusion were studied with the welding procedure test and numerical simulation in combination.
Yongli SUI, Zhili LUO
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, 2018 高推重比航空发动机普遍采用气膜冷却技术,叶片气膜冷却孔的加工精度直接影响发动机效能。气膜冷却孔具有孔径小、数量多、深径比高、空间角度复杂的特点,其加工难度大、成形精度要求高。针对当前国外对叶片气膜孔加工技术与装备的严格保密,以及国内气膜孔加工中存在的几何精度偏低、质量不稳定的现状,对气膜孔加工的现状及发展趋势进行归纳总结,为气膜孔加工技术与装备的发展提供参考。首先,概述了叶片气膜孔精确加工的必要性及其重要性,分别介绍了现有气膜孔的加工方法,分析了当前加工方法存在的问题与面临的挑战 ...
吴宗璞 +4 more
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