等温挤压工艺剔除7N01合金粗晶的试验研究

摘要

On the basis of microstructure analysis of 7N01 alloy under various extrusion temperatures , the coarse-grain formation mechanism in thermal extrusion process was uncovered . And then the feasibility of isothermal extrusion for eliminating coarse-grain formation was analyzed from the thermodynamic perspective .The validity of this process was verified in our experiments with various ingot temperatures .Experimental results showed that isothermal extrusion process is beneficial to eliminate coarse-grain formation ,and has a good application prospect .%通过对7N01合金在不同挤压温度下显微结构的分析，揭示了7N01合金热挤压时粗晶的产生机制，从热力学角度分析了用等温挤压工艺解决粗晶现象的可行性，并在不同锭坯温度下的显微图片中得到了验证。表明等温挤压工艺是解决7N01合金制品粗晶现象的一个可行的方法，具有很好的应用前景。