论文部分内容阅读
利用热模拟实验机Gleeble 3800结合锻造实验、显微组织观察、电子探针成分分析等方法研究了加热温度、变形温度、变形量、冷却速率对齿轮钢SAE8620H连铸坯表层区域和内部区域试样的带状组织的影响,结果表明,元素偏聚小的表层区域无带状组织形成,元素偏析明显的内层区域在适宜的条件下形成不同程度的带状组织,锰等元素的偏析是带状组织形成的必要条件,可以通过提高加热温度、增大变形量等方式减轻或降低带状组织。
The heat simulation experiment machine Gleeble 3800 was used to study the surface temperature and deformation temperature, deformation and cooling rate on the surface area and inner area of SAE8620H continuous casting billet by combining the forging experiment, microstructure observation and electron probe composition analysis. The results showed that the surface region with less segregation of elements was formed without banding and the inner layer with obvious element segregation formed different degrees of ribbon structure under suitable conditions. The segregation of elements such as manganese was The formation of the necessary conditions for the organization, you can increase the heating temperature, increase the amount of deformation and other ways to reduce or reduce the ribbon structure.