基于连续挤压的黄铜合金成形过程的数值模拟

针对黄铜合金连续挤压成形过程中存在变形抗力大、成形不稳定等问题,本文应用有限元法模拟分析了H62黄铜合金连续挤压应力应变场、温度场和流动速度场分布规律。模拟结果表明,成形温度达到了铜合金再结晶温度以上,模具口处应力集中、速度差大,降低该处的成形阻力将对黄铜合金稳定成形十分有利。黄铜合金连续挤压成形实验验证了数值模拟分析结果。

Numerical simulation of deformation process of brass alloy based on continuous extrusion

Aiming at the problems of large deformation resistance, instability forming etc. exist in the process of continuous extrusion for brass alloys, the stress-strain field, temperature field and flow velocity field distribution rules of the H62 brass alloy were analyzed by three-dimensional finite element method. Simulation results show that the forming temperature above the recrystallization temperature, the stress concentration is presented at die outlet position and flow velocity difference is large. Reducing the resistance in this position will be very favorable for the brass alloy stable forming. The numerical simulation analysis was verified by the continuous extrusion experiment.