低碳钢热轧过程中组织变化的研究  

Microstructure Evolution of Low Carbon Steel during Hot Rolling

作　　者：杜林秀[1] 刘相华[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《机械工程材料》2002年第9期1-3,30,共4页Materials For Mechanical Engineering

基　　金：国家新一代钢铁材料重大基础研究项目(G1998615 0 9)

摘　　要：用宝钢SS4 0 0钢 ,在Gleeble 15 0 0热模拟试验机上进行了 3道次及 6道次降温变形试验 ,每道次变形前和变形后均进行喷水冷却 ,以研究多道次变形过程的组织变化。为确定应变诱导相变的上限温度 ,采用变形后落水冷却的方法进行了不同温度下单道次变形试验 ,测定了不同温度变形后冷却速度为 3℃ /s时冷却过程的相变点Ar3。通过对多道次和单道次试验的组织分析 ,结合变形后冷却过程相变点的测量结果 ,初步确定了 90 0～The three pass and six pass deformation experiments were carried out on Gleeble 1500 thermomechanical simulator for SS400 steel, and the samples were quenched by spurting water before and after each pass in order to study the microstructure evolution during the hot deformation. The single pass deformation experiments at different temperatures, in which the samples were quenched by making them drop into the water after deformation, were also carried out in order to determine the upper limit temperature of strain induced transformation (A3d). The A r3 points with cooling rate of 3℃/s after deformation at different temperatures were measured using Gleeble 2000. The microstructure evolution during the hot rolling in the temperature range of 900～830℃ was determined through the analysis of the experimental results.

关 键 词：低碳钢 多道次热变形 铁素体 相变 组织 热轧 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TG335.11[金属学及工艺—金属材料]