摘要
低碳低合金钢焊缝金属的显微组织基本上包括先共析铁素体、针状铁素体、侧板条铁素体、少量的粒状贝氏体和马氏体。分析了这些组织的形成条件及特点，焊缝金属化学成分和冷却速度是影响焊缝金属组织的主要因素，阐述了各种组织的形核位置。低碳低合金钢焊缝金属最理想的组织是获得大于６５ ％ 的针状铁素体，其平均板条尺寸约为１ μｍ 。
In general,the microstructure of weld metal of the low carbon and low alloy steels consists of pre eutectoid ferrite,acicular ferrite,side plate ferrite and some granular bainite and martensite.The transformation conditions and nature of the microstructure are analyzed in a systematic way in this paper.The main influencing factors of the microstructure in weld metal are composition and cooling rate of the weld metal.The sites for nucleation of different phases are expounded in the weld metal of the low carbon and low alloy steel,the best combination of properties is obtained when there is more than 65 % of acicular ferrite and the average lath size is about 1 μm.
出处
《钢铁》
CAS
CSCD
北大核心
1999年第12期67-71,共5页
Iron and Steel
基金
国家重点基础研究项目
关键词
低合金钢
焊缝金属
显微组织
针状铁素体
low carbon and low alloy steel,weld metal,microstructure,acicular ferrite
