摘要
采用X射线衍射(XRD)、透射电镜(TEM)和拉伸实验等方法,研究了两种常规卷取温度对热轧C-Si-MnNb-V-N钢组织性能及析出行为的影响。结果表明,卷取温度为450℃时试验钢析出物颗粒尺寸要小于卷取温度为400℃时试验钢中的析出物颗粒尺寸,但是数量多于卷取温度为400℃时析出物的数量。在两种卷取温度条件下制备的试验钢中铁素体的平均晶粒尺寸均小于5μm,残余奥氏体数量相差不大,但是在450℃卷取温度下通过细晶与析出强化可制备出抗拉强度900 MPa级、强塑积27000 MPa·%的热轧TRIP钢,其综合性能力学优于400℃卷取温度下制备的热轧TRIP钢。
The precipitation behavior and mechanical property of hot-rolled TRIP steel C-Si-Mn-NbV-N coiled at two different temperatures were investigated by means of XRD, TEM and tensile test. Results show that the size of precipitates is smaller, while the quantity of the precipitates is larger for the steel coiled at 450℃ rather than at 400℃. The average grain size of ferrite grains of the steel coiled at the two temperatures is all less than 5 μm, but the difference in quantities of retained austenite grains is small. The tensile strength and strength-ductility product of the steel coiled at 450℃ are 900 MPa and27000 MPa·% respectively, which may be ascribed to both of the fine grain strengthening and precipitation strengthening. Therefore, the steel coiled at 450℃ presents better comprehensive mechanical property than that coiled at 400℃.
作者
高绪涛
赵爱民
张元
GAO Xutao;ZHAO Aimin;ZHANG Yuan(College of Mechanical,Electronic and Control Engineering,Beo＇ing Jiaotong University,Beijing 100044,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing Beijing 100083,China;Subway Operation Technology Center,Beijing Mass Transit Railway Operation Corporation Ltd,Beijing 102208,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2018年第9期662-668,共7页
Chinese Journal of Materials Research
关键词
金属材料
TRIP钢
热轧
析出
组织性能
metallic materials
TRIP steel
hot rolling
precipitation
structure property
