退火对IF钢微观界面及性能的影响  

Effect of annealing on the micro-interface and properties of interstitial-free steel

作　　者：罗晓阳[1] 赵小龙[1] 王正仲 王生东[1] 贾智 LUO Xiao-yang;ZHAO Xiao-long;WANG Zheng-zhong;WANG Sheng-dong;JIA Zhi(Carbon Steel Sheet Plant,Jiu Steel Group Hongxing Iron&Steel Co.Ltd.,Jiayuguan 735100,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]酒钢集团宏兴钢铁股份有限公司碳钢薄板厂,甘肃嘉峪关735100 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050 [3]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2025年第1期19-24,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(52265049);甘肃省高等学校产业支撑计划(2022CYZC-26);甘肃省重点研发计划-工业类(23YFGA0054);甘肃省自然科学基金(23JRRA922)。

摘　　要：对IF钢在不同升温速率下进行不同温度的退火,研究升温速率和退火温度对IF钢微观组织和力学性能的影响,揭示热处理参数对力学性能的协同作用机制.结果表明:随着升温速率的降低以及退火温度的升高,晶粒的长径比不断减小,晶粒逐渐趋于等轴化,且在低升温速率下,退火温度对晶粒的影响作用更大.同时α-纤维织构强度随着退火温度的升高而降低,并逐渐向γ-纤维织构偏移,表明形成再结晶织构.通过室温拉伸实验发现拉伸断口均呈蜂窝状,属于典型的塑性断裂,且随着温度的升高延伸率不断增加,材料的均匀变形能力逐渐增强,塑性不断提高,当升温速率和退火温度分别为0.8℃/min和800℃时,长径比最小为1.58,延伸率达到最大为40%.The effects of heating rate and annealing temperature on the microstructure and mechanical properties of interstifial-free steel were studied,and the synergistic mechanism of heat treatment parameters on the mechanical properties was revealed.The results showed that with the decrease of heating rate and the increase of annealing temperature,the aspect ratio of the grains decreases and the grains tend to be equiaxed.At a low heating rate,the annealing temperature has a greater effect on the grains.At the same time,the intensity of α-fiber texture decreases with the increase of annealing temperature,while gradually shifts toγ-fiber texture,indicating the formation of recrystallization texture.Tensile tests at room temperature showed that the fracture surfaces are honeycomb-like and belong to typical plastic fractures.With the increase of temperature,the elongation increases,the uniform deformation ability of the material increases,and the drawing ability increases.When the heating rate and annealing temperature are 0.8℃/min and 800℃,respectively,the minimum aspect ratio is 1.58,the maximum elongation is 40%.

关 键 词：IF钢 升温速率 退火温度 微观组织结构 力学性能 

分 类 号：TG161[金属学及工艺—热处理]