摘要:
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。
Abstract:
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.
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