镍基管材热挤压中玻璃润滑机理的数值模拟研究
Numerical Simulation Study of Ni-based Pipe in Hot Extrusion for Glass Iubrication Mechanism
孙海伟, 范永革, 易 勇
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作者单位：西南科技大学 材料科学与工程学院， 四川 绵阳 621010
中文关键字：数值模拟； 热挤压； 玻璃垫
英文关键字： numerical simulation; hot extrusion; glass pad
中文摘要：模拟摩擦效应对镍基合金管材热挤压的不良影响，着重从挤压力方面讨论了挤压过程的可行性。研究表明：钢坯两侧润滑系数f在0.02～0.03，玻璃垫处在0.01附近，金属匀速流动，径向应力应变分布均匀；当f ＞0.05时，会造成挤压曲线震荡，不利于热挤压的进行。
英文摘要：The bad influence of friction on hot extrusion of Ni-based alloy pipe was simulated. The feasibility of extrusion process was seriously discussed from extrusion pressure aspects. The results show that when the lubrication coefficient f is between 0.02 and 0.03 at billet's both sides and is near 0.01 at glass pad, the metal flows uniformly and the radial stress and strain distribute uniformly; when the f is bigger than 0.05, the extrusion curve shocks, and it is not conducive to carry on hot extrusion.