K·LANGE和M·BLAICH概述了当今挤压的水平、工艺限制以及前景展望。他们首先对内应力作了深入研究,每种挤压产品带有的这种内应力,都是由于出口制品,特别是不对称型材断面上材料流动情况、温度及其冷却的不均匀分布所引起的。同样,挤压型材的机械性能普遍都有明显的各向异性。其中引用了G·SCHRODER的工作,他绘制了与挤压方向成不同角度截取的拉伸试样的流变曲线,并从中发现了流变应力值有显著差异。 K. LANGE and M. BLAICH outline the level of extrusion today, process limitations and outlooks. They first conducted an in-depth study of internal stresses, and the internal stresses associated with each extruded product are due to the uneven distribution of material flow, temperature, and cooling of the exit product, particularly the asymmetric section . Similarly, the mechanical properties of extruded profiles generally have obvious anisotropy. Which cited the work of G. SCHRODER, he plotted the extrusion direction of the tensile specimens taken at different angles from the rheological curve and found that the flow stress values ​​were significantly different.