热变形参数对贝氏体非调质冷镦钢组织性能的影响  

Effect of Hot Deforming Parameters on Microstructure and Mechanical Property of Bainite Non-quenched Cold Heading Steels

作　　者：柳美玲[1] 曹杰[1] 章静[1] 余同仁[2] 阎军[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《安徽工业大学学报（自然科学版）》2010年第3期262-265,共4页Journal of Anhui University of Technology（Natural Science）

基　　金：科技部支撑计划项目资助(2007DAE30B04)

摘　　要：通过实验测试贝氏体非调质冷镦钢的相变点,采用Gleeble3500热模拟实验机研究变形程度和冷却速度对非调质贝氏体冷镦钢组织转变和力学性能的影响。结果表明,增加冷却速度,强度变高。增加变形程度,有利于低冷速条件下的铁素体转变,而在冷却速度一定的情况下,增加变形量,硬度与强度也有所降低。实验表明,在40%变形量,10℃/s冷却速度条件下,强度相对较高。Phase transformation temperature of non-quenched steels for cold heading has been measured.Effects of hot deforming parameters on microstructure and mechanical property were studied by thermo-mechanical simulation in Gleeble3500 simulator. The results show that both the deformation degree and cooling rate affect the microstructure and mechanical property. The strength of the samples was increased as increasing in cooling rate the large deformation enhanced the transformation of ferrite at low cooling rate. For the given cooling rate, strength and hardness of the samples decreased with the increasing of deformation. The experiments show that at the condition of 40% deformation, 10℃/s cooling rate,the strength of the samples were be maximized.

关 键 词：贝氏体 冷镦钢 热变形 组织性能 

分 类 号：TG113[金属学及工艺—物理冶金]