Transactions of Materials and Heat Treatment

Title：Influence of different forging ratios on mechanical properties， corrosion resistance and friction and wear resistance for Q355D steel

Authors： Fan Chenyang1 Hu Guoxiang2 Ye Zixin3 Wang Mingtao4 Han Tian5 Wu Liujun5

Unit： 1. CCCC Second Harbor Engineering Company Ltd. Wuhan 430048 China . Jiangsu Hengli Hydraulic Co. Ltd. Changzhou 213000 China . CCCC Wuhan Harbour Engineering Design & Research Institute Co. Ltd. Wuhan 430040 China 4. Zhenjiang Office China Classification Society Zhenjiang 212013 China 5. School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China

KeyWords： Q355D steel forging ratio mechanical properties corrosion resistance friction and wear resistance

ClassificationCode：TG292

year,vol(issue):pagenumber：2025,50(6):8-17

Abstract：

To meet the mechanical properties and corrosion resistance requirements of large hydraulic cylinder barrels and piston rods, the forging process of Q355D low-alloy high-strength steel was studied in depth. Then, by optical microscopy (OM), electron backscatter diffraction (EBSD) and laser confocal microscopy (LCM), the marine environment was simulated and the focus was on studying the influences of different forging ratios (2.8, 4.5 and 6.4) on the mechanical properties, corrosion resistance and friction and wear resistance of Q355D steel. The research shows that with the increasing of forging ratio, the content of pearlite in Q355D steel increases, and the grain size of ferrite and pearlite is refined, which gradually improves its yield strength and hardness at room temperature. In addition, the increase of forging ratio also improves the corrosion resistance and friction and wear resistance of Q355D steel in a NaCl solution with the mass fraction of 3.5%.

Funds：

江苏省青年基金资助项目（BK20240854）

作者简介：范晨阳(1993-)，女，硕士，工程师，E-mail：3148436640@qq.com；通信作者：吴刘军(1992-)，女，博士，助理研究员，E-mail：jun561992@163.com

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