张永成

【摘 要】槽型轨是目前国内外轻轨交通系统中常用轨型之一，在马路中部铺设无缝槽型轨线路，形成有轨电车与汽车共用是国际上最为通用的做法，鞍山紫竹59R2U75V槽型钢轨与普通钢轨相比，其型貌的不对称、轨顶面沟槽的窄间隙等特性，对焊接工艺有极高的要求，通过对YHG-1200TH型焊轨机焊后推瘤装置的重新设计，对槽型轨焊接工艺进行了深度研究，通多不断的焊接工艺调试和数据分析，转变了“高低高”硬规范焊接工艺参数的设置思路，认为鞍山紫竹59R2U75V槽型钢轨由于其横截面的不对称、以及相对于普通60Kg/m钢轨其轨顶、轨腰和轨底部位相对较薄，则更需要较大的聚集热量才能形成良好的焊接接头，通过对YHG-1200TH型焊轨机100个焊接工艺参数的重新分析和合理配置，经过连续15根落锤不断以及静弯、疲劳、硬度、金相等试验数据分析，确立了一套可靠实用的鞍山紫竹59R2（U75V）槽型钢轨“高低高”软规范焊接工艺。

【关键词】鞍山紫竹;59R2U75V;槽型钢轨;YHG-1200TH;焊接工艺;软规范

Research on Welding Technology of "Soft Specification" for Anshan Zizhu 59R2U75V Groove rail

Zhang Yong-cheng

（China Railway First Bureau Group Xinyun Engineering Co.， Ltd Xianyang Shanxi 712000）

【Abstract】Groove rail is one of the common rail types in light rail transportation system at home and abroad. It is the most common practice to lay seamless groove rail lines in the middle of the road to form tramcar and car sharing. Compared with ordinary rail， groove rail of Zizhu 59R2U75V in Anshan has the characteristics of asymmetric shape， narrow gap of groove on the top of rail， and so on. It has very high requirements for welding technology. The redesign of the pushing device after welding of YHG-1200TH type rail welder has deeply studied the welding process of groove rail. Through continuous welding process debugging and data analysis， the idea of setting the welding process parameters of "high and low" hard specification has been changed. It is considered that the groove rail of Zizhu 59R2 U75Vin Anshan has asymmetrical cross section and its top， waist and waist of the rail relative to the ordinary 60Kg/m rail. If the rail bottom is relatively thin， it needs more accumulated heat to form a good welded joint. Through re-analysis and reasonable configuration of 100 welding parameters of YHG-1200TH rail welder， and analysis of 15 continuous drop hammers， static bending， fatigue， hardness and metallographic test data， a set of reliable and practical "height" of Zizhu 59R2 U75V trough rail in Anshan has been established. High "soft specification welding process.

【Key words】Anshan Zizhu;59R2U75V; Groove rail;YHG-1200TH;Welding Technologyt;Soft specification

1. 鞍山紫竹59R2U75V槽型鋼轨化学成分及可焊性分析

针对鞍山紫竹59R2U75V槽型钢轨的具体焊接特征，建立一套最佳匹配的焊接工艺，从根本上有效提高焊轨质量，必须对钢轨材料的可焊性，闪光焊机性能及工艺参数等因素进行综合分析比较，对具体的轨型，钢轨物理学性能、化学成分的不同，通过焊接实验和分析确定合理的焊接工艺参数，才能在实际生产中提高焊头的焊接合格率，提高焊接效率，保证焊接质量。……