55t大型锻造用钢锭疏松缺陷的模拟与试验研究

Numerical Simulation of Porosity Defects in 55-ton Steel Ingots for Large Forgings

利用ProCAST有限元软件对55 t大型锻造用钢锭的凝固过程进行了数值模拟。分析了钢锭与锭模之间不同换热系数的冷却条件下,钢锭纵截面疏松缺陷的分布区域、形貌及疏松程度的演变规律。模拟分析得出,当钢锭与锭模之间的换热系数为1 200 w(/m2.k)时,钢锭内部的疏松缺陷面积最小,疏松程度最低。与试验结果进行对比,模拟结果与试验结果吻合较好。

Using the finite element software of ProCAST,the solidification processes of 55-ton steel ingots for large forgings were simulated.Distribution area,morphology and density of porosity defects in 55-ton large ingot were analyzed under cooling conditions of different heat transfer coefficients between the ingot and the mold.The simulation results indicate that the porosity area and density is least when the coefficient of heat transfer is 1 200 w/（m2ok）.Through comparison of the simulation results and the test results,it is found that the simulation results are identical to that of the test.