Transactions of Materials and Heat Treatment

Title：Hot stretch forming technology of semiclosed complex section steel

Authors： Luo Xianlong1 Huang hua1 Luo Guangzheng1 Liu Xianghua2

Unit： 1. Liaoning Zhongche Rail Transportation Co.Ltd. 2. School of Materials Science and Engineering Northeastern University

KeyWords： semi-closed section steel hot stretch forming variable thicknesses inhomogeneous deformation hot rolling

ClassificationCode：TG335.19

year,vol(issue):pagenumber：2021,46(12):154-158

Abstract：

A new hot stretch forming method for producing semi-closed complex cross-section steel was proposed, its characteristics, key technologies and essential features were given, and the production process scheme was introduced. Then, compared with the traditional forming process, the hot stretch forming technology could take advantage of the characteristic of good plasticity and low deformation resistance of rolled parts in the hot state to obtain products with different thicknesses at various positions, and the workpiece with partial complex structures was produced. Furthermore, the new hot stretch forming technology was industrially applied in

Liaoning Zhongche Rail Transportation Co.Ltd. to produce twelve varieties of semi-closed complex cross-section steel production such as Halfen channel steel. The cumulative output reached 40000 t, and the yield rate reached 94% or more. In addition, the cost per ton can be reduced by RMB 260. Thus, the goals of energy saving, emission reduction and cost reduction is achieved to provide a new way for the production of complex cross-section steel with variable thicknesses.

Funds：

作者简介：罗显龙（1989-），男，硕士，高级工程师 E-mail：luoxlg@126.com 通信作者：刘相华（1953-）男，博士，教授 E-mail：liuxh@mail.neu.edu.cn

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