焊接参数对Gr1钛板焊缝组织和性能的影响

Influence of Welding Parameters on Microstructure and Mechanical Performance of Gr1 Titanium Plate

Gr1钛板是爆炸法制金属复合板常用材料,大幅Gr1板常需进行拼焊处理。为了使拼焊后的Gr1钛板的塑性指标能够满足后续爆炸复合工艺的要求,选择不同焊接参数和送丝方式对5.5 mm厚的Gr1钛板进行拼焊,通过金相、硬度、拉伸、弯曲等对比分析,研究不同工艺参数对其焊缝组织和力学性能的影响。结果表明,Gr1板在I=90A,U=10 V,v=4.8 mm/s,不添加焊丝的自熔方式下拼焊,可以在焊缝处获得大片细小的α态晶粒组织和较好的综合力学性能,在该工艺下拼焊的Gr1钛板满足爆炸复合用钛板的使用要求。

Gr1 titanium plate is commonly used for explosion metal clad plates. Great area plate needs to be tailor-welded. In order to ensure plasticity of Gr1 titanium plate satisfy requirements for subsequent explosive cladding process,different welding parameters and wire-feed modes are chosen for tailor-welding 5. 5 mm Gr1 titanium plate. Through the comparative analysis of metallography,hardness,tension and bend,influence of different process parameters on the weld structure and mechanical properties are investigated. The results show that self-fusion tailor-welding without welding wire under the welding conditions of I = 90 A,U = 10 V,v = 4. 8 mm/s can achieve significant fraction of fine α grains and good comprehensive mechanical performance at the weld. Tailor-welding Gr1 titanium plate can meet the requirements for explosion metal clad plate.