摘要
为了提高复合管成形效率,提出一种短流程复合管坯制备的新工艺,采用纵连轧的方式将两种材料热轧成坯。以45碳钢/316不锈钢复合管坯为例,对纵连轧过程进行了有限元模拟分析以及实验探究,分析了纵连轧过程中管坯的应力、应变的变化规律,并对复合层切片进行了微观组织观察。结果表明:这种短流程纵连轧工艺能够轧制出复合界面良好的复合管坯。纵连轧轧后的复合管坯组织由316不锈钢侧的奥氏体、45碳钢侧的铁素体+珠光体组成。复合层清晰均匀,界面完好无缺陷,厚度为5μm,复合界面有Ni、Mo、Cr等金属元素的扩散。纵连轧工艺具有短流程、高效的技术特点,可以有效解决复合管坯的生产问题。
In order to improve the forming efficiency of composite pipe,a new process for the preparation of short-process composite pipe billet was proposed,and two different materials were hot-rolled into billets by the longitudinal continuous rolling method.Then,for 45 carbon steel/316 stainless steel composite pipe billet,the finite element simulation analysis on the longitudinal continuous rolling process as well as the experimental investigation were carried out to analyze the change law of stress and strain for the pipe billet in the longitudinal continuous rolling process,and the microstructure of composite layer slices was observed.The results show that this short-process longitudinal continuous rolling process can roll out the composite pipe billet with good composite interface.The composite pipe billet organization after longitudinal continuous rolling consists of austenite on the side of 316 stainless steel and ferrite+pearlite on the side of 45 carbon steel.The composite layer is clear and uniform,the interface is intact and has no defects,and the thickness is 5μm.There is diffusion of metal elements such as Ni,Mo,Cr at the composite interface.Thus,the longitudinal continuous rolling process has the technical characteristics of short-process and high efficiency which can effectively solve the production problems of composite pipe billet.
作者
吴涛
陈建勋
胡建华
李潮
双远华
Wu Tao;Chen Jianxun;Hu Jianhua;Li Chao;Shuang Yuanhua(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《锻压技术》
北大核心
2025年第8期161-167,176,共8页
Forging & Stamping Technology
基金
山西省自然科学基金资助项目(202203021221158)。
关键词
复合管坯
双金属复合管
纵连轧
等效应变
微观组织
composite pipe billet
bimetallic composite pipe
longitudinal continuous rolling
equivalent strain
microstructure
