球墨铸铁管是以镁或稀土镁结合金球化剂在浇注前加入铁水中,使石墨球化,应力集中降低,使管材具有强度大、延伸率高、耐冲击、耐腐蚀、密封性好等优点;内壁采用水泥砂浆衬里,改善了管道输水环境、提高了供水能力、降低了能耗;管口采用柔性接口,且管材本身具有较大的延伸率,使管道的柔性较好,在埋地管道中能与管道周围的土体共同工作,改善管道的受力状态,从而提高了管网运行的可靠性。因此,目前我国供水行业通常采用球墨铸铁管作为主管材
球墨铸铁管件。
从市场分析入手,对EPC法与传统砂型铸造工艺进行了比较,介绍了EPC法生产球墨铸铁管件的工程设计内容及对策,并提出了工艺设计的关键点。
Based on analysis of market conventional sand mold cast process has been compared with EPC process of which design and measures for s. g. iron pipes have been introduced as well as key of technology.
介绍了球墨铸铁管件消失模铸造工艺的计算机辅助设计CAD软件的设计原理、操作方法,该CAD软件可提高消失模铸造球铁管件的工艺设计效率和设计精度。
It is introduced the design principal and operation method of CAD software for vanishing-mould casting process of nodular cast iron pipe. It can raise the design efficiency and precision.
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