水轮机焊接部件火焰矫形的讨论(中英文)

1、水轮机焊接部件火焰矫形的讨论(中英文 摘要 :本文根据多年经验 , 结合国内外机组相关资料 , 阐述水轮机主要 焊接部件结构变形的主要种类 , 介绍焊接变形的火焰矫形的施工方 法。Abstract: this paper based on years of experience, combined with domestic and foreign units related information, this turbine main welding parts structure deformation of the main types, introduces construction

2、method of welding deformation of flame straightening. 关键词 :水轮机 ; 火焰矫形 ; 焊接变形Key words: hydraulic turbine; Flame straightening; Welding deformation目前 , 大型水轮机部件已经大量的采用焊接结构。而水轮机主要 焊接部件是由座环、顶盖、 底环等部件组成。这些构件在制作过程中 都存在焊接变形问题 , 如果焊接变形不予以矫正 , 则不仅影响结构整体 安装 , 还会降低工程的安全可靠性。At present, the large turbine parts h

3、ave a lot of welding structure. And turbine main welding parts consists of seat ring, the top and bottom ring parts. These artifacts welding deformation problems in the production process, if the welding deformation is not corrected, will not only affect the structure of the overall installation, wo

4、uldalso reduce the safety and reliability of engineering.焊接水轮机部件产生的变形超过技术设计允许变形范围 , 应设法 进行矫正 , 使其达到符合产品质量要求。实践证明 , 多数变形的构件是 可以矫正的。 矫正的方法都是设法造成新的变形来达到抵消已经发生 的变形。Turbine parts from the welding deformation is more than technical design allows the deformation range, should try to to correct, to conform

5、to the requirements of the quality of the product. Practice has proved that most of the deformation of the component can be correct. Correction methods are trying to cause a new deformation to achieve offset has happened.在生产过程中普遍应用的矫正方法 , 主要有机械矫正、火焰矫正 和综合矫正。但火焰矫正是一门较难操作的工作 , 方法掌握、温度控 制不当还会造成构件新的更大变形

6、。因此 , 火焰矫正要有丰富的实践 经验。 本文对水轮机部件焊接变形的种类、 矫正方法作了一个粗略的 分析。Correction methods in general use in the process of production, the main have mechanical correction, flame straightening and comprehensive correction. But the flame correction is a more difficult operation work, improper control, temperature cont

7、rol also creates new bigger deformation. Therefore, flame correction should have rich experience in practice. In this paper, a correction ofwelding deformation type turbine components, method makes a rough analysis.1 水轮机部件焊接变形的种类与火焰矫正1 the kinds of welding deformation and flame straightening turbine

8、 parts水轮机部件的主要构件是焊接 H 型结构 (如座环 、箱体结构 (如 顶盖 , 底环 、 支撑结构。 焊接变形经常采用以下三种火焰矫正方法 :(1线状加热法 ;(2点状加热法 ;(3三角形加热法。 下面介绍解决不同部位 的施工方法。The turbine parts of main component is welded H structure (such as seat ring, enclosure structure (such as roof, bottom ring, support structure. Welding distortion often use the f

9、ollowing three methods of flame correction: (1 linear heating method; (2 dot heating method; (3 triangular heating method. To solve different parts of the construction method is described below.以下为火焰矫正时的加热温度 (材质为低碳钢 Flame correction for the temperature (is made of mild steel,低温矫正 500度600度 冷却方式 :水Low

10、 temperature correction cooling way: 500 600 degrees of water中温矫正 600度700度 冷却方式 :空气和水In 600 700 degrees temperature correction cooling: air and water 高温矫正 700度800度 冷却方式 :空气High temperature correction 700 800 degrees cooling: air注意事项 :火焰矫正时加热温度不宜过高 , 过高会引起金属变脆、 影响冲击韧性。 16Mn 在高温矫正时不可用水冷却 , 包括厚度或淬硬倾 向较

11、大的钢材。Note: flame correction when the heating temperature is unfavorable and exorbitant, become fragile, too much can cause metal impact toughness. 16 mn in high temperature correction is water cooling, including the tendency of hardenability thickness or larger steel. 1.1座环环板及顶盖、底环盖板的上拱与下挠及弯曲1.1 sea

12、t inside board and the top plate, bottom ring under the arch and the torsion and bending一、在座环环板及顶盖、底环盖板上 , 对着纵向焊缝 , 由中间向两 端作线状加热 , 即可矫正弯曲变形。为避免产生弯曲和扭曲变形 , 两条 加热带要同步进行。 可采取低温矫正或中温矫正法。 这种方法有利于 减少焊接内应力 , 但这种方法在纵向收缩的同时有较大的横向收缩 , 较 难掌握。A, here inside board and the top and bottom ring plate, to the longitudinal weld, from middle to both ends of line heating, bending deformation can be corrected. In order to avoid bending and torsiondeformation, two tropical to synchronize. Can take corrective or medium temperature correction