铁路货车高强度耐候钢药芯焊丝性能研究

Study on the properties of high strength weathering steel flux cored wire for railway freight cars

摘要:气体保护药芯焊丝在国内铁路货车行业应用较少,目前主要采用气体保护实心焊丝。由于气体保护药芯焊丝相比实心焊丝具有电弧稳定、飞溅小和焊缝成型美观等优点,某公司针对铁路货车最常用的Q450NQR1高强度耐候钢开发了牌号为GFR-81W2型配套药芯焊丝。文中对GFR-81W2型药芯焊丝的熔覆金属和对接接头化学成分、力学性能、显微硬度及金相组织进行分析,并介绍了GFR-81W2药芯焊丝批量应用于生产的情况。

Abstract:Gas shielded flux cored wire is used in the domestic railway freight car industry. Due to the gas shielded flux cored wire compared to solid wire has the advantages of stable arc, little spatter and weld appearance and a company for railway freight cars is the most commonly used of Q450NQR1 high strength weathering steel developed grade GFR-81W2 supporting type flux cored wire. In this paper, the chemical composition, mechanical properties, micro hardness and microstructure of the cladding metal and butt joint of GFR-81W2 flux cored wire are analyzed, and the GFR-81W2 flux cored wire is introduced.

正文快照:n 3|_U^=“药芯焊丝以其电弧稳定、飞鹏小、焊缝外观成型好、抗气孔能力强等优点,在国内外得到了广泛应用与发展。国外尤其是发达国家药芯焊丝已大量应用于造船、重型机械制造、铁道车辆制造等领域。国内药芯焊丝的开发和应用也有近20年的历史,然而在铁路货车制造上的应用几