新型多功能全位置立向下焊条的开发

Multifunction electrode for all position and vertical down welding

开发了一种新型全位置立向下焊条,采用有约束的配方均匀设计,对焊条配方进行了优化,采用GXⅢ高温物性测试仪对焊条药皮的熔化特性进行了研究。结果表明,开发的全位置立向下焊条具有优良的工艺性能,焊缝成形美观,易脱渣,电弧稳定,飞溅率小等;该焊条具有较高的抗拉强度、屈服强度和较高的低温冲击韧性,能广泛应用于重要结构焊接。通过对焊接接头断口、金相组织以及焊缝成分和焊接接头横截面硬度分析表明了焊缝具有较高力学性能。形成了一整套开发全位置立向下焊条的新方法,该方法具有开发周期短、成本低、质量高的特点。

A new kind of covered electrode for all position and vertical down welding was developed. The composition of the electrode coating has been optimized using the uniform design method. Melting properties of the electrode coating were studied using test instrument of the GX-ⅡI high-temperature physics properties. Experiments results show that the developed electrode has excellent operating characteristics such as arc stability, slag detachment, bead shape, welding spatter and so on. The mechanical tests show that the weld metal obtained in SMAW with this electrode exhibits high tensile strength, yield strength and toughness at low temperature. Through fracture micrograph, weld microstructure, weld composition and hardness distribution of welded joints the weld has high mechanical properties. The electrode can be widely used for the welding of important structures. This new method of developed the electrodes can shorten the development cycle, reduce costs and improve quality of the electrode.