[1]张昕宇,林 胜,吴王平.doi: 10.3969/j.issn.1001-3849.2026.04.013螺杆表面镀铬工艺及其耐磨性能[J].电镀与精饰,2026,(04):83-91.
　ZHANG Xiyu,LIN Sheng,WU Wangping.Process and wear resistance of chromium plating on screw surface[J].Plating & Finishing,2026,(04):83-91.
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doi: 10.3969/j.issn.1001-3849.2026.04.013螺杆表面镀铬工艺及其耐磨性能()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2026年04
页码:
83-91
栏目:
出版日期:
2026-04-30

文章信息/Info

Title:
Process and wear resistance of chromium plating on screw surface
作者:
张昕宇1; 2; 林 胜3; 吴王平3
张昕宇1,2,林 胜3,吴王平3(1. 上海晶科绿能企业管理有限公司,上海 201100 ;2. 晶科能源(海宁)
Author(s):
ZHANG Xiyu1; 2;  LIN Sheng3;  WU Wangping3
(1. Shanghai Jinko Solar Green Energy Enterprise Management Co., Ltd., Shanghai 201100, China; 2. Jinko Solar ( Haining) Co., Ltd., Haining 314415, China; 3. School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China)
关键词:
注塑机;  螺杆;  电镀铬
Keywords:
injection molding machine;  screw;  electroplating chromium
分类号:
TQ153 TG176
文献标志码:
A
摘要:
本研究围绕注塑机螺杆表面电镀铬工艺及其综合性能开展系统性研究，旨在提升镀层在复杂塑化工况下的服役稳定性。以42CrMo钢为基体材料，结合其优异的力学性能，设计电镀铬工艺对其表面进行强化。考虑到传统电镀铬工艺在高温高压、高磨损环境下易出现镀层结合力差、硬度不足等问题，本文通过优化铬酐浓度、硫酸比例、电流密度与电镀温度等参数，系统探讨了工艺条件对镀层结构与性能的影响。采用SEM观察镀层的表面形貌与截面结构，结合X射线能谱(EDS)分析元素分布，利用XRD表征其晶体结构。通过显微硬度计测定镀层硬度，摩擦磨损试验评估其常温与高温下的耐磨性能，并采用电化学工作站测试其在3.5% NaCl溶液中的开路电位、极化曲线与阻抗响应。研究结果表明，优化后的铬镀层表面致密均匀，与基体结合牢固，具有较高的显微硬度与良好的摩擦学性能；在腐蚀环境中表现出更正的腐蚀电位、更低的腐蚀电流密度及更高的界面阻抗，具有良好的抗腐蚀能力。本研究为注塑机螺杆表面强化提供了可靠的工艺支撑与理论依据，亦为硬铬镀层在高端注塑装备中的推广应用奠定了技术基础。
Abstract:
This study systematically investigates the electroplating process of chromium coatings on the surface of injection molding machine screws, aiming to enhance the service performance of the coating under harsh plasticizing conditions. Using 42CrMo steel as the substrate, its excellent mechanical properties were designed for surface strengthening by a hard chromium electroplating process. Considering the limitations of traditional chromium coatings, such as poor bonding strength and inadequate hardness under high-temperature and high-pressure working environments, the effects of key parameters including chromic acid concentration, sulfuric acid ratio, current density, and plating temperature on the coating structure and properties were comprehensively studied. Surface morphology and cross-sectional structure were observed by using SEM, and elemental distribution was analyzed by energy-dispersive X-ray spectroscopy (EDS). The crystal structure of the coating was characterized by XRD. Additionally, the mechanical properties were evaluated by microhardness tests, while the wear performance at room and elevated temperatures were assessed using friction and wear testing. The corrosion resistance was analyzed by open circuit potential (OCP), Tafel polarization, and electrochemical impedance spectroscopy (EIS) in a 3.5% NaCl solution. The results demonstrate that the optimized Cr coatings exhibit a dense and uniform surface with strong adhesion to the substrate, high microhardness, and excellent tribological performance. Furthermore, it exhibits a more positive corrosion potential, lower corrosion current density, and higher interfacial impedance, indicating superior electrochemical stability. This research provides practical process support and theoretical guidance for the surface strengthening of injection screws and lays a technical foundation for the widespread application of hard chromium coatings in high-end plastic molding equipment.
更新日期/Last Update: 2026-04-15