锻压技术

不同锻造比对Q355D钢力学性能、耐腐蚀性能以及耐摩擦磨损性能的影响

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

作者：范晨阳1 胡国享2 叶子昕3 王明涛4 韩天5 吴刘军5

单位：1.中交第二航务工程局有限公司湖北武汉 430048 2. 江苏恒立液压股份有限公司江苏常州 213000 3. 中交武汉港湾工程设计研究院有限公司湖北武汉 430040 4. 中国船级社镇江办事处江苏镇江 212013 5. 江苏大学机械工程学院江苏镇江 212013

关键词：Q355D钢锻造比力学性能耐腐蚀性能耐摩擦磨损性能

分类号：TG292

出版年,卷(期):页码：2025,50(6):8-17

摘要：

为满足大型油缸筒和活塞杆在力学性能和耐腐蚀性能方面的需求，对Q355D低合金高强度钢的锻造工艺进行了深入研究。利用光学显微镜（OM）、电子背散射衍射（EBSD）、激光共聚焦显微镜（LCM）等设备，模拟海洋环境，重点研究了不同锻造比（2.8、4.5和6.4）对Q355D钢力学性能、耐腐蚀性能以及耐摩擦磨损性能的影响。研究表明，随着锻造比的提高，Q355D钢组织的珠光体含量增加，铁素体和珠光体的晶粒尺寸细化，使得室温下其屈服强度和硬度逐渐增加。此外，锻造比的增加还提高了Q355D钢在质量分数为3.5%的NaCl溶液中的耐腐蚀性能和耐摩擦磨损性能。

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%.

基金项目：

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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