Cr-Mo系低合金钢锻前高温扩散工艺的实验研究  

Experimental study on diffusion annealing before forging of Cr-Mo low-alloy steel

作　　者：刘鑫刚[1] 聂绍珉[1] 任运来[1] 

机构地区：[1]燕山大学机械工程学院,秦皇岛066004

出　　处：《塑性工程学报》2007年第5期141-144,共4页Journal of Plasticity Engineering

摘　　要：文章以2.25Cr-1Mo-0.25V钢为对象,研究了锻前高温扩散工艺中加热温度、保温时间对低合金Cr-Mo钢组织均匀程度的影响。实验结果表明,提高加热温度、增加保温时间都将提高钢组织的均匀程度,而加热温度的影响尤其明显。若以组织均匀程度为判定依据,该材料的锻前高温扩散参数应为1150℃×30h或1200℃×20h。如果保温时间过长,将出现网状仿晶界型铁素体,力学性能下降。With 2.25Cr-1Mo-0.25V steel, the article study the influence of heating-up temperature and holding time, which are two major factors of diffusion annealing before forging, on homogenous degree of structure of Cr-Mo low-alloy steel. The results show homogenous degree of structure increase by rising heating-up temperature or prolonging holding time, especially the influ- ence of heating-up temperature. The process of diffusion annealing before forging is at least 1150℃ X 30h or 1200℃ X 20h. How- ever, if the holding time is too long, reticular grain boundary allotriomorphic ferrite produce at austenitic grain boundary, which reduce the mechanical property.

关 键 词：2.25Cr-IMo-0.25V钢 锻前高温扩散 粒状贝氏体 仿晶界型铁素体 

分 类 号：TG142.1[一般工业技术—材料科学与工程]