Lightweight wheels can reduce weight about 100kg for commercial vehicles,and it can save energy and reduce emission,what”s more,it can enhance the profits for logistics companies.The development of lightweight commercial vehicle wheels is achieved by the development of new steel for rim,the process optimization of flash butt welding,and structure optimization by finite element methods.Niobium micro-alloying technology can improve hole expansion rate,weldability and fatigue performance of wheel steel,and based on Niobium micro-alloying technology,a special wheel steel has been studied whose microstructure are Ferrite and Bainite,with high formability and high fatigue performance,and stable mechanical properties.The content of Nb in this new steel is 0.025%and the hole expansion rate is ≥100%.At the same time,welding parameters including electric upsetting time,upset allowance,upsetting pressure and flash allowance are optimized,and by CAE analysis,an optimized structure has been attained.As a results,the weight of 22.5in×8.25in wheel is up to 31.5kg,which is most lightweight comparing the same size wheels.And its functions including bending fatigue performance and radial fatigue performance meet the application requirements of truck makers and logistics companies.
Hongzhou Lu Lilong Zhang Jiegong Wang Zhaozhi Xuan Xiandong Liu Aimin Guo Wenjun Wang Guimin Lu
CITIC Metal Co.,Ltd. Room 1901,Capital Mansion,6＃ Xin Yuan Nanlu,Chaoyang District,Beijing,100004,P. Benxi Iron & Steel(Group)Co.,Ltd.,Jiefang Nanlu No.41,Pingshan District,Benxi,114072,P. R. China Shandong Xingmin Wheel Co.,Ltd,Longkou Econimic and Technological Development Zone,Yantai City,Shand The College of Materials Science Engineering,Jilin University,Changchun people Avenue5988,Changchun, The School of transportation and engineering,Beihang University,XueYuan RoadNo.37,HaiDian District,B CITIC Metal Co.,Ltd. Room 1901,Capital Mansion,6# Xin Yuan Nanlu,Chaoyang District,Beijing,100004,P. The School of mechanical and power engineering,East China University of Science and Technology,Meilo
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