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低碳微合金钢贝氏体相变及组织细化的研究 预览 被引量:3

Bainite Transformation and Structure Refinement of Low Carbon Microalloy Steel
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摘要 针对低碳铌、钛微合金钢,采用Gleeble-1500热模拟机进行了加热、变形及冷却试验,对不同工艺制度下的显微组织进行了分析.结果表明,加热时间较长时,不利于随后冷却奥氏体向等轴铁素体相变,而发生贝氏体相变;在奥氏体区进行不同应变量的变形,随着奥氏体的形变量加大,相变贝氏体的组织细化;变形后适当增加弛豫时间,相变的贝氏体组织细化. Experiments of heating, deformation and cooling were carried out on low carbon Ti-Nb microalloy steel by use of Gleeble-1500 thermomechanical simulator, and the microstructure was analyzed under the different process conditions. The results show that when the heating time is long, it is unfavorable for austenite to transform into equiaxed ferrite, but rather to bainite during the subsequent cooling. The transformed bainite structure is refined with increasing the strain of austenite. If appropriately increase the relaxation time after deformation, the transformed bainitic structure can be refined.
作者 李维娟 刘英义 LI Wei-juan, LIU Ying-yi (School of Materials Science and Engineering, University of Science and Technology Liaoning, Anshan Liaoning 114051, China)
机构地区 辽宁科技大学
出处 《金属热处理》 EI CAS CSCD 北大核心 2007年第8期 47-49,共3页 Heat Treatment of Metals
关键词 低碳微合金钢 贝氏体 组织细化 驰豫 low carbon microalloy steel bainite refinement of structure relaxation
作者简介 李维娟(1966.02-),女,辽宁锦州人,教授,博士,主要从事金属材料的显微组织与性能控制方面的研究,发表论文20余篇.联系电话:0412-5929550 E-mail:liweijuan826@163.com
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