共查询到19条相似文献,搜索用时 546 毫秒
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哈氏合金B-3是一种抗强还原性介质腐蚀的镍钼合金,与大多数奥氏体材料类似,由于中温热稳定性较差而易引起晶间腐蚀敏感,严格控制线能量及层间温度是保证其焊接质量的关键。根据哈氏合金B-3材料性能及焊接特性,采用等离子弧焊接试板并选择盐酸法(加压)对试样进行晶间腐蚀试验,以达到摸索并制定正确的焊接工艺的目的。 相似文献
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本文主要叙述了B - 3合金的特性 ,包括优良的抗各种浓度和温度下盐酸的腐蚀能力以及耐硫酸、醋酸、甲酸、磷酸腐蚀。同时也介绍了哈氏B - 3合金用于容器制造中的成形、焊接、热处理等的实践经验 相似文献
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结合近年来中国大型压力容器制造厂锻件制造呈现出的制造难点及特点,简要介绍了中国压力容器锻件行业在制造装备水平、工艺方式方面的变化以及材料、制造工艺等方面的技术进步及发展现状。 相似文献
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陕西咸阳天然气公司3台5000m^3天然气球罐是我国西部大开发战略中的重要工程项目,该项目是利用亚洲开发银行贷款筹建的工程,是我国自己的设计,制造,组焊的大型球罐工程史上的又一里程碑,该项目制造标(含设计)是国际招标项目,鞍山钢制压力容器有限公司在竞标中中标,完成了3台5000m^3大型天然气球罐的设计与制造工作,本文将3台5000m^3天然气球罐的设计情况做简要介绍。 相似文献
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阀门用钴基合金及堆焊工艺 总被引:7,自引:0,他引:7
介绍了钴的发现和发展过程,阐述了钴基合金的种类、特性及在阀门产品中的应用.给出了阀门密封面堆焊钴基合金的材料标准及典型工艺方法,对国内高温高压阀门密封面用钴基合金代用材料的研究作了简单的介绍。 相似文献
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CASTsoft软件在低压铸造中的应用 总被引:3,自引:0,他引:3
随着计算机硬件水平的提高,铸造CAE软件对实际生产的指导作用日益显著.介绍了CASTsoft软件低压铸造模块的功能和原理,并给出了铝合金壳形件的应用实例,该软件能准确预测铝合金铸件中的缩孔缩松等缺陷,并能辅助工艺人员进行工艺优化,指导实际生产. 相似文献
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分析了SB型海底用特种压力管道旋转法兰的结构创新点,介绍了设计中应解决的关键问题及相应的设计方案。所设计的SB型海底用特种压力管道旋转法兰将传统海底用压力管道法兰的整体式结构变为分体组合式可旋转结构,解决了高磅级大规格海底用压力管道法兰在深水环境下安装维护不便的难题,对法兰采用表面火焰喷涂铝、锌及其合金防腐层,选用R49号八角形密封垫环,具备长期有效、安全可靠的防泄漏、抗腐蚀能力,达到了国内同类产品技术的先进水平,在国内、特别是国际市场上有巨大的市场潜力。 相似文献
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Analysis of the bulging process of an AZ31B magnesium alloy sheet with a uniform pressure coil 总被引:1,自引:1,他引:0
Fei Feng Shangyu Huang Jianhua Hu Zhenghua Meng Yu Lei 《The International Journal of Advanced Manufacturing Technology》2013,69(5-8):1537-1545
As the lightest metal material, magnesium alloy is widely used in the aerospace, automobile, and consumer electronic industries. However, magnesium alloy sheet has poor formability at room temperature. Electromagnetic forming is a high velocity forming technique that can promote the formability of low ductility materials, improve the strain distribution of workpieces, and reduce their wrinkling and springback. In this work, a uniform pressure coil was used to bulge AZ31B magnesium alloy sheets. The finite element method was then used to analyze this bulging process. The bulging contours and displacements of AZ31B magnesium alloy sheets were consistent with the experiment results. The distribution of the magnetic field intensity and magnetic field forces were found to be better than using a flat spiral coil. The deformation rule of AZ31B magnesium alloy sheet using the uniform pressure coil differed from that using the flat spiral coil. The largest strain occurred at the center of the sheet. 相似文献
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The present study deals with an investigation of dry sliding wear behaviour of grain refined and or modified eutectic (Al-12Si) Al-Si alloy by using a Pin-On-Disc machine. The indigenously developed Al-1Ti-3B and Al-10Sr master alloys were used as grain refiner and modifier for the grain refinement of α-Al dendrites and modification of eutectic Si, respectively. Various parameters have been studied such as alloy composition, sliding speed, sliding distance and normal pressure. The cast alloys, master alloys and worn surfaces were characterized by SEM/EDX microanalysis. Results suggest that, the wear resistance of eutectic Al-Si alloys increases with the addition of grain refiner (Al-1Ti-3B) and or modifier (Al-10Sr). Further, the worn surface studies show that adhesive wear was observed in Al-12Si alloy in the absence of grain refiner and modifier. However, an abrasive and oxidative wear was observed when the grain refiner and modifier are added to the same alloy. Commercially available LM-6 (12.5%Si) alloy was used for comparison. 相似文献