半固态钢铁材料轧制产品的力学特性

将弹簧钢（60Si2Mn)和不锈钢（1Cr18Ni9Ti)在半固态下1道次轧制成形，对轧制产品进行拉伸实验，研究其在室温条件下的力学性能，并对拉伸变形过程中的塑性变形机理进行了分析，研究结果表明：不同的固相率对轧制产品的力学性能有明显的影响，在研究范围内随着固相率的提高，其力学性能亦提高，半固态轧制过程中所产生的液固相分离，导致半固态轧制产品组织分布差异，使轧制产品不同区域的力学性能不同，同时由于半固态轧制产品特有的球形固相颗,其伸拉时的塑性变形机理也有自身的特点。

MECHANICAL CHARACTERISTICS OF ROLLED PRODUCTS OF SEMI-SOLID STEELS

Spring steel (6OSi2Mn) and stainless steel (1Cr18Ni9Ti) were rolled by one pass in the semi-solid state, and the tensile test of their products was carried out. The room temperature mechanical properties and the mechanism of plastic deformation during tensile deformation were in- vestigated. The results show that the mechanical properties is obviously effected by solid fraction, and increased with solid fraction increasing. The liquid and solid phases were broken away during rolling in the semi-solid state, which resulted in the difference of microstructural distribution, so that the difference of mechanical properties at different regions appeared. At the same time, the mechanism of plastic deformation during tensile deformation of rolled products of semi-solid steels has their own characteristics.