冷变形CrMo钢系列温度退火后的组织与性能  

Structure and properties of CrMo steel annealed in series of temperatures after cool deformation

作　　者：于宏[1] 田素贵[1] 耿新[1] 洪鹤[1] 刘丹清 王宏明 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110023 [2]沈阳金杯汽车贸易股份有限公司,辽宁沈阳110002 [3]营口技术监督局,辽宁营口115001

出　　处：《沈阳工业大学学报》2001年第6期459-462,共4页Journal of Shenyang University of Technology

基　　金：辽宁省教育厅基金项目(9718221112)

摘　　要：对球化退火CrMo钢进行了冷形变、性能测试及TEM组织观察.结果表明:形变量为29.3%的冷变形合金,再结晶温度为600℃;该合金经不同的温度退火,在300℃出现峰值强度,其中高密度位错缠结束集形成的亚晶是产生峰值强度的主要原因;随退火温度提高,发生亚晶合并长大,晶界面积减少,因而使强度降低,塑性提高.The structure and properties of a CrM o steel after cool drawing deformati on are studied by means of TEM observation and measuring of recrystallization temperature.Results s how that 600℃is determined as the recrys-tallization temperature for the ste el with the cool drawing deformation ofε=29.3%.The maximumstrength of the steel occurs at 300℃in the curvesσ-temperature,which inainly result s from the role of subgrain strengthening within the ferrite matrix.The subgrains may be formed fromthe clusterin g of the dislocation tangles.The subgrains are grown up and the magnitude of the g rain boundaries are decreased with t he increase of annealing temperatur e,which results in the yield strength r educed and the toughness improved.

关 键 词：再结晶 组织结构 亚晶强化 CRMO钢 退火温度 铬钼合金钢 冷变形 

分 类 号：TG142.33[一般工业技术—材料科学与工程]