This study leads to engineering practice greatly and provides the testing and theoretical basis to further studies on the cause of the gray cast iron welded joint crack, It has great academic value. 对此问题的研究不仅对工程实践具有较高的指导意义,更为进一步探讨灰口铸铁焊接接头裂纹产生原因提供了实验与理论依据。
Various kinds of steel such as structure steel, tool steel, pipe line steel, reinforcing steel bar, common engineering steel and cast iron may be improved in their properties by vanadium nitrides and carbides. 氮化钒、碳化钒可用于改善结构钢、工具钢、管道钢、钢筋、普通工程钢以及铸铁的性能。
Taking section of Xuefu street of Taiyuan water engineering of Yellow River source as example, this paper introduces installation norm and process of nodular cast iron pipe, analyzes influencing factors of quality safety, proposes the quality control measures. 以黄河水源太原市给水工程学府街段球墨铸铁管安装为例,介绍了球墨铸铁管的安装规范和安装程序,分析了影响安全质量的因素,提出了安装质量的控制措施。
As an important engineering material, nodular cast iron is widely used in each department of national economy. 作为一种重要的工程材料,球墨铸铁广泛应用于国民经济各部门。
It can effectively promote to all kinds of engineering structure, such as transmission tower, high strength cast iron, bridges, automobile and manufacturing of large structure, thus huge benefits will certainly come into being in our economic life. 可以有效的推广至各类高强钢工程结构,如输电铁塔、高强钢筋、桥梁、汽车制造及大型结构等的制造中,必将给我国经济生活带来巨大效益。
It has significant engineering practicability that refining the carbides as hard phase in hypereutectic high chromium cast iron. 对过共晶高铬铸铁中的硬质相碳化物进行细化具有重要的工程意义。