Transactions of Materials and Heat Treatment

Title：Analysis on deformation of 45 carbon steel/316 stainless steel composite pipe billet in longitudinal continuous rolling process and experimental study

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ClassificationCode：TG355

year,vol(issue):pagenumber：2025,50(8):161-168

Abstract：

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 5 μm. 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.

Funds：

山西省自然科学基金资助项目（202203021221158）

作者简介：吴涛（2000-），男，硕士研究生 E-mail：s202214110326@stu.tyust.edu.cn 通信作者：陈建勋（1966-），男，学士，教授 E-mail：2009001@tyust.edu.cn

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