Transactions of Materials and Heat Treatment

Title：Research on microstructure and properties for Pilger cold rolled 304 stainless steel tube

Authors： Li Wei Chu Zhibing Shuai Meirong Wang Huanzhu Xue Zhanyuan Li Yugui Xue Chun Su Hui

Unit： Taiyuan University of Science and Technology

KeyWords： Pilger cold rolling 304 stainless steel tube microstructure evolution mechanical properties metal flow

ClassificationCode：TG335.71

year,vol(issue):pagenumber：2019,44(6):53-58

Abstract：

The forming process of 304 stainless steel tube was studied by the method combining Pilger rolling experiment and numerical simulation technology, and the changes law of microstructure and mechanical properties of 304 stainless steel tube during forming process were analyzed by metallographic microscope and tensile test. The results show that the metal flow direction at any point on the tube in the forming process is in a changing process, and the internal flow lines of grains are randomly distributed. Then, the equivalent stress on the inner wall is greater than that on the outer wall, the shear band of the inner wall is more obvious, and the deformation is more severe. Furthermore, the crushing occurs during the rolling process, and the average grain size of steel tube decreases. The hardness of steel tube increases from 236 HV before rolling to 403 HV after rolling continuously, and the yield strength and tensile strength also increase with the progress of rolling from 352 and 794 MPa before rolling to 745 and 1209 MPa after rolling, respectively.

Funds：

国家重点研发计划项目(2018YFB1307902);国家自然科学基金资助项目（U1710113）；中国博士后科学基金项目（2017M622903）；山西省重点研发计划重点项目（201703D111003，201703D111002）；山西省重点研发计划一般项目（201703 D121008）；山西省研究生联合培养基地人才培养项目（2018JD33）

李伟（1994-），男，硕士研究生 E-mail：854523935@qq.com 通讯作者：楚志兵（1981-），男，博士，教授 E-mail：chuzhibing@tyust.edu.cn

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