Effect of Rolling Technology on Microstructure and Microhardness of Lowcost X80 Pipeline Steel
摘 要
利用Gleeble-1500D型热模拟试验机对传统型X80管线钢和经济型X80管线钢进行模拟轧制,研究了变形温度、冷却速率和终冷温度等工艺参数对其组织和硬度的影响。结果表明:两种试验钢的组织均为针状铁素体、少量准多边形铁素体和粒状贝氏体,二者的显微硬度相差不大;随着变形温度降低、冷却速率增大和终冷温度降低,经济型X80管线钢的组织逐渐细化,M/A岛由棒状逐渐变成圆点状,尺寸变小,显微硬度的波动不大。
Abstract
Simulating rolling was carried out for traditional X80 pipeline steel and lowcost X80 pipeline steel using Gleeble-1500 thermal simulated test machine,the effects of deformation temperature, cooling rate and finish cooling temperature on microstructures and microhardness were studied. The results show that microstructures of the two tested steels were acicular ferrite, quasi-polygonal ferrite and granular bainite, and their microhardness had little difference. With the decrease of the deformation temperature and final cooling temperature, the increase of the cooling rate, the microstructure of lowcost X80 pipeline steel was refined and M/A island changed from rods to dots with smaller size gradually, and the microhardness of lowcost X80 pipeline steel had a little fluctuation.
中图分类号 TG142.1 DOI 10.11973/jxgccl201512012
所属栏目 物理模拟与数值模拟
基金项目
收稿日期 2014/9/25
修改稿日期 2015/6/15
网络出版日期
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备注狄嫣(1990-),女,辽宁鞍山人,硕士研究生。
引用该论文: DI Yan,WANG Chang-chang,JIA Shu-jun,LIU Qing-you,PENG Ju-bo. Effect of Rolling Technology on Microstructure and Microhardness of Lowcost X80 Pipeline Steel[J]. Materials for mechancial engineering, 2015, 39(12): 51~54
狄 嫣,王畅畅,贾书君,刘清友,彭巨擘. 轧制工艺对经济型X80管线钢组织和显微硬度的影响[J]. 机械工程材料, 2015, 39(12): 51~54
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