微合金钢焊缝金属中针状铁素体相变动力学分析  

Dynamics of AF transformation in weld metal of microalloyed steels

作　　者：云绍辉[1] 张德勤[2] 田志凌[3] 杜则裕[1] 

机构地区：[1]天津大学,天津300072 [2]九江学院材料科学与工程系,江西九江332005 [3]钢铁研究总院,北京100081

出　　处：《焊接学报》2005年第8期35-38,共4页Transactions of The China Welding Institution

基　　金：国家重点基础研究发展规划项目(1998061500);江西省教育厅科技计划项目(赣教技字2005-236)

摘　　要：采用热膨胀法成功地测出不同热输入下微合金钢焊缝金属组织中针状铁素体(AF)相变开始温度及终止温度,并绘制出AF转变开始温度和终止温度曲线,得出焊缝金属组织中AF相变温度范围为668～541℃.在热模拟和定量金相试验基础上,通过对试验数据的分析,建立了微合金钢焊缝金属中AF相变的各种T-tc-f动力学曲线.通过对AF各种相变动力学曲线的分析和讨论,得出微合金钢焊缝金属组织中AF相变的一般规律.The starting and finishing temperature of Acicular Ferrite (AF) in weld metal of microalloyed steels for different heat-input have been measured by using the thermal-expanding method. The curves of transformation have also been plotted. The temperature range of AF transformation is between 668°C and 541°C. The T-tc-f dynamics curves of AF transformation have been established based on the thermal simulating data and quantitative microstructure tests. The common rules of AF transformation in weld metal of microalloyed steels have been obtained by analyzing the dynamics curves.

关 键 词：针状铁素体 动力学 焊缝金属 微合金钢 

分 类 号：TG113[金属学及工艺—物理冶金]