压力加工各基本工序中,在变形体内,由于流速不均和流动方向不同,切变形是普遍存在的,而且在变形体的某些部位占主导地位。但是,在研究变形程度对金属组织和性能的影响时,习惯上主要考虑了线应变,而未考虑切应变。因此,生产实践中很多现象不能园满解释,也不利于指导生产和科研实践。本文结合一些挤压和模锻件实例论述了切变形对金属组织和性能的影响。 In the basic processes of pressure processing, shear deformation is ubiquitous in the deformation body due to the different flow velocity and flow direction, and it dominates in some parts of the deformation body. However, when studying the influence of the degree of deformation on the microstructure and properties of metal, it is customary to mainly consider the linear strain without considering the shear strain. Therefore, many phenomena in production practice can not be fully explained, nor conducive to directing production and scientific research. In this paper, some examples of extrusion and die forging are discussed the effect of shear deformation on the microstructure and properties.