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。
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.
出处
《热加工工艺》
CSCD
北大核心
2011年第17期127-129,共3页
Hot Working Technology
关键词
数值模拟
热挤压
玻璃垫
numerical simulation
hot extrusion
glass pad
