摘要
以超高强锚杆钢为研究对象,利用Gleeble-3800型热模拟试验机研究了冷却速度、连续冷却条件对其膨胀曲线的影响,并结合金相-硬度法绘制出该钢的连续转变冷却曲线(CCT曲线)。结果表明:试验钢的临界相变点A_(c1)和A_(c3)分别为732和883℃;在冷却速度为0.5~25℃/s的范围内,随着冷却速度的提高,试验钢在连续冷却转变下的组织产物首先是铁素体,而后依次为珠光体和贝氏体,铁素体所占比例不断减少,珠光体的含量不断增加,并有少量贝氏体形成,硬度逐步增加。
Effects of cooling rate and continuous cooling conditions on the expansion curve of ultra-high strength anchor steel were studied by Gleeble-3800 thermal simulation test machine,and the continuous transformation cooling curves(CCT curve)of the steel were drawn by metallographic hardness method.The results show that the critical transformation points A_(c1) and A_(c3) of the experimental steel are 732℃and 883℃,respectively.In the range of cooling rate of 0.5-25℃/s,with the increase of cooling rate,the microstructure products of the experimental steel under continuous cooling transformation are ferrite,pearlite and bainite in turn,the proportion of ferrite decreases,the content of pearlite increases,a small amount of bainite is formed,and the hardness increases gradually.
作者
寻懋年
齐治畔
刘鹏
宋青松
张晋源
施爱娟
韩培德
XUN Mao-nian;QI Zhi-pan;LIU Peng;SONG Qing-song;ZHANG Jin-yuan;SHI Ai-juan;HAN Pei-de(School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Tongcai Industry and Trade Co Ltd,Linfen 043400,China;Department of Vehicle Operation Engineering,Yantai Automotive Engineering Professional College,Yantai 265500,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2022年第3期108-113,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51871159)。
关键词
锚杆钢
CCT曲线
硬度
相变点
热膨胀法
anchor steel
CCT curve
hardness
phase transition point
thermal expansion method
