09MnNiD钢马氏体大压下量温轧及低温退火后的组织与力学性能  

Microstructure and Mechanical Properties of 09MnNiD Steel Plate Produced by Severe Worm-Rolling and Low Temperature Annealing of Martensite

作　　者：高聿为[1] 荆天辅[1] 赵新[1] 乔桂英[1] 王威[1] 周继锋[1] 宋新宇[1] 

机构地区：[1]河北省亚稳材料制备技术与科学重点试验室燕山大学材料工程学院,河北秦皇岛066004

出　　处：《金属热处理》2005年第12期5-8,共4页Heat Treatment of Metals

基　　金：国家自然科学基金钢铁联合基金(50271060;50371074);河北省自然科学基金(593291)

摘　　要：利用Gleeble-3500热模拟试验机测定了不同温度下试验钢温变形的流变应力,对淬火09MnNiD钢板条马氏体组织进行了多道次压下量大于70%的温轧及低温退火试验.用透射电镜(TEM)观察分析了经过不同温变形以及不同温度退火后的微观组织,利用TEM暗场弦线法和X射线衍射谢乐法测定并计算了晶粒尺寸,在热模拟试验机上对退火样品进行拉伸试验.结果表明,温轧后在300～600℃进行退火可获得细小的纳米晶粒和超细晶粒钢板;拉伸试验表明,温轧钢板在＜450℃下退火后的抗拉强度变化不大,当退火温度在550℃及以上时抗拉强度显著下降.The flow stress of 09MnNiD steel worm-rolled at different temperatures was measured by Gleeble-3500 thermal simulate tester. The tested steel with lath martensite was muhi-pass warm rolled in reduction more than 70% and low temperature annealed. The microstructure of the steel worm rolled and annealed under different processes was examined using TEM. The grain size of the steel was measured by TEM dark field technique and X-ray diffractions, and the corresponding tensile properties were tested by the thermal simulate tester. The results show that nano-grained and ultra-fine grained steel plates are obtained by annealed between 300℃ ～600℃ after warm rolling. The tensile test shows that the tensile strength of the steel has a little change when annealed below 450℃ and is greatly dicreasing above 550℃.

关 键 词：09MnNiD钢板 大塑性变形 温变形 纳米晶粒 低温退火 

分 类 号：TG115.5[金属学及工艺—物理冶金]