60mm厚高强环形件拼焊工艺研究

Study on Welding Process of 60 mm Ring-shaped Parts with High Strength

通过MSC.Marc焊接数值模拟研究了屈服强度为700 MPa级的60 mm厚环形件（外径1600 mm,内径1200 mm）分段拼焊的工艺方法。试验验证表明,采用野X形非对称坡口,一次交错对称施焊冶工艺,焊接线能量9-12kJ/cm,产品的焊接变形量可控制在3 mm以内,力学性能与母材相当,满足使用要求;材料利用率相对整体切割成形可提升90.6%。

The welding process of 60 mm ring-shaped parts with 700 MPa yield strength was numerically simulated with MSC.Marc. According to the results of verification test, the mechanical properties and deformation less than 3mm can meet the design requirements by symmetrical welding process with X-asymmetric groove and line energy of 9 to 12 k J/cm. The material utilization of the welding process increases by 90.6% compared with integral cutting process.