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分析了蒸压反应釜腐蚀的原因;通过对比试验研究了各种防腐方法及效果,最终确定电弧喷涂铝复合涂层可解决反应釜的腐蚀;计算了该复合涂层的寿命,结果显示,反应釜采用复合涂层可提高服务寿命1倍以上,节约钢材约20%. 相似文献
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应力腐蚀开裂(SCC)是化工设备腐蚀失效的主要形式。文章分析缩合反应釜应力腐蚀开裂的原因,提出预防缩合反应釜应力腐蚀措施。 相似文献
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针对硝铵结晶反应釜扩容后工作负荷增加,反应釜搅拌装置振动和噪声随之上升,导致搅拌装置轴承、填料磨损加剧,反应釜密封不严等问题,提出此类设备改造的基本原则;结合试验对搅拌机架、搅拌轴密封和填料、减振装置进行了重新设计,解决了反应釜搅拌装置的振动和噪声问题,延长了搅拌装置轴承、填料寿命,提高了生产效率和产品质量。 相似文献
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某染料厂在生产化工染料过程中,发生了物料从反应釜内渗漏的事故,中断生产后检查发现反应釜衬里严重腐蚀开裂,直接经济损失4万元以上,耽误生产约3个月。本文查明了反应釜衬里腐蚀原因,并提出适合生产工艺条件的耐蚀钢种及防护措施。 相似文献
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根据常规武器装备的结构特点及使用、贮存环境条件,简述了腐蚀对其危害;阐明了对常规武器装备进行腐蚀控制设计的重要性、必要性。依据多年武器装备腐蚀控制设计经验,从装备的全寿命期出发,总结了武器装备腐蚀控制设计的基本步骤和内容,绘制了武器装备全寿命期的腐蚀控制设计示意图,对武器装备腐蚀控制设计的系统化、规范化及提高防腐蚀水平、减少损失都具有重要意义。 相似文献
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基于响应面法的铁表面PTFE涂层的使用寿命研究 总被引:1,自引:1,他引:0
目的模拟生活中不粘锅的使用环境,采用响应面法预测铁表面PTFE涂层的使用寿命,为生活中合理使用不粘锅提供支撑。方法通过响应面法考察转速和载荷对铁表面PTFE涂层使用寿命的影响,采用中心组合试验设计(CCD)考察载荷以及转速对于铁表面PTFE涂层使用寿命的影响及其相互作用。结果载荷和转速对于涂层使用寿命的影响都极为显著,检验值(F)都小于0.0001。通过试验设计软件得出使用寿命与转速和载荷的二阶多项式方程,并且复相关系数R2为0.9951,能解释99.51%响应值的变化,因此模型能够较准确地预测铁表面PTFE涂层的使用寿命。该实验工况下铁表面PTFE涂层的最佳使用参数分别为转速200r/min和载荷25 N,此时涂层寿命为147 min左右。结论模拟日常生活中使用不粘锅的实际情况,并运用响应面法分析和预测PTFE涂层的使用寿命具有科学性和可操作性,能够很好地指导生活中安全使用不粘锅。 相似文献
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Probabilistic approaches are available for service life design of reinforced concrete structures subjected to reinforcement corrosion. The International Federation for Structural Concrete (fib) has proposed a model code where design equations and related parameters, involving materials properties, exposure conditions and construction details, are reported. This paper investigates the role of design parameters in the prediction of service life by applying the fib design procedure to existing structures suffering carbonation‐induced corrosion. Results of the modelling were compared to results of the inspection and a significant difference was observed. In order to investigate the reasons for this difference, the roles of concrete cover thickness and carbonation depth were considered separately in the modelling of service life. The concrete cover thickness had a significant effect on the output of the service life modelling, which however was not sufficient to explain the discrepancy between in situ and modelling results. The modelled values of carbonation depth were also affected by errors; sensitivity analysis showed that, although some parameters had higher influence than others, no single parameter had a predominant role. 相似文献
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An Approach to Life Cycle Oriented Technical Service Design 总被引:1,自引:0,他引:1
The importance of technical, i.e. product related services has significantly increased over the past years. Traditionally, technical services are provided during product usage. In light of the potential impact of technical services on the entire product life cycle, the application of life cycle engineering techniques to service design is suggested. Consequently, the presented research work aims at developing a service design process. Based on three main strategies for combining products with related services, a corresponding design process is proposed. It simultaneously considers the product, process and information dimensions of services. 相似文献
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This paper proposes ISCL, Integrated Service CAD and Life cycle simulator. ISCL plays the role of CAD/CAE tools for product design in Product Service Systems (PSSs) design. In ISCL, the service CAD supports systematic generation of alternative PSSs based on service modeling, and the life cycle simulator analyzes their economic and environmental performances. The current study applies ISCL to the design of a PSS that includes functional upgrading service of a product, whose life cycle costs are sensitive to both its functional obsolescence and physical deterioration. Performances of alternative PSSs are investigated under different market and technology conditions. 相似文献
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如何提高注塑模具使用寿命 总被引:2,自引:0,他引:2
分析了影响注塑模具使用寿命的主要因素,从塑料原材料、模具结构设计、模具材料选择、模具制造过程和模具使用与维护等方面提出了提高注塑模具使用寿命的基本途径. 相似文献
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提高挤压模具使用寿命的措施 总被引:1,自引:1,他引:0
李玉萍 《锻压装备与制造技术》2005,40(6):74-76
对影响挤压模具寿命的因素进行了分析,并针对设计、制造、热处理、模具管理和使用等各环节给予相应的措施,从而阐明了提高模具使用寿命的重要性。 相似文献
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In metal-forming industries, die is an important tool for fabrication of metal-formed products. Die service life, which is defined as the maximum product number produced by die before it fails, and die performance directly determine the quality of metal-formed product and production cost. In cold forming process, die service life basically refers to the die fatigue life. The die fatigue life is determined by the design of metal-formed product and die, forming process configuration, die stress and the entire metal-forming system. In this paper, a methodology for optimization of die fatigue life is developed via the rational design of metal-forming system in such a way that the die stress is optimal and further the die design in terms of its service life is the best. To realize this thought, the S–N approach is employed for evaluation of die fatigue life. The die stress is first identified via the integrated simulation of billet plastic flow and the die deformation during the forming process. The die stress is then optimized via the rational design of the combination of metal-formed product, die and process configuration. The optimal die life is thus determined. Furthermore, a framework for implementation of this methodology is developed and case studies are used for verification and validation of the developed methodology. 相似文献