作　　者： ; ; ; ;

机构地区： 东北大学材料与冶金学院

出　　处： 《中国有色金属学报》 2002年第5期1002-1006,共5页

摘　　要： 对单辊搅拌技术制得的A2 0 17半固态材料小热变形后二次加热时的组织演化进行了研究。小热变形后的半固态材料加热到半固态区后可获得细小的球形组织 ;在加热过程中 ,由于位错能与界面能的存在以及溶质的扩散使合金发生块状化、再结晶、熔断球化 3阶段变化 ;小变形促进该过程的进行 ;由于细小球形组织成形性能好 ,半固态轧材的断裂强度提高了 75MPa ,延伸率提高了 16 %。 By using A2017 semi-solid material manufactured by Single-Roll Stirring(SRS) process, the microstructure evolution during the process of remelted A2017 semisolid alloy with little hot deformation was studied. Finer spherical microstructure was obtained after it was remelted to semi-solid temperature. Due to energies of dislocations and internal surface of microstructure and solute diffusion, A2017 alloy changes its microstructure, which includes three steps during heating process: conglomeration, recrystalization and spherodization. Little deformation accelerates the process described as above. Because of good forming property of spherical structure, the crack strength of products obtained by semi-solid rolling process is improved by 75 MPa, and elongetion is improved by 16%.

关 键 词： 合金 组织 性能 合金 二次加热 断裂强度 半固态轧制 半固态触变成形工艺

领　　域： [金属学及工艺]