同种材质摩擦焊接头焊缝的组织及性能研究

Study on Microstructure and Property of Friction Welded Joints of Similar Material

利用C150、C50连续驱动摩擦焊机分别对08F钢、20钢进行同种材料焊接试验。08F钢试验工艺参数为:主轴转速2000r/min、摩擦压力9.5kN、顶锻力23.6kN;20钢试验工艺参数为:主轴转速2500r/min、摩擦压力22kN、顶锻力30kN。焊后对其接头的组织性能进行研究。结果表明:应用连续驱动摩擦焊,能形成良好的焊接接头,接头的晶粒比母材区晶粒细小;焊接接头由塑性变形区、热影响区组成;焊接接头的硬度值大于母材区,08F钢接头的硬度值较母材区提高了约20%,20钢提高了约40%。

By the style of C150 and C50 continous driven friction welder, the welding test for 08F steel and 20 steel was carried out. The 08F steel experimental recommended process parameters： spindle speed n=2000 r/m, friction pressure F=9.5 kN, forging pressure F=23.6 kN. 20 steel experimental recommended process parameters： spindle speed n=2500 r/m, friction pressure F=22 kN, forging pressure f=30 kN. The mechanical properties of the welded joint was researched. The results show that：the application of continous driven friction welding to 08F steel and 20 steel can form a good joint, the grain of welded joint is smaller than that of base metal. The welded joint is composed of plastic deformation zone and heat affected zone; the hardness of welded joint is greater than that of base metal zone; the hardness of 20 steel welded joint increases by 40%, and the hardness of 08F steel welded joint increases by 20%.