模具技术Moulds & Dies
轮胎模具DLC涂层摩擦学性能研究
董传贺①魏修亭①李志永の张伟②李帅王志刚史伟良
2017年第9期
（①山东理工大学机械工程学院，山东淄博255000：②山东豪迈机械科技股份有限公司，山东潍坊261500）
摘要：为了探究高性能轮胎模具DLC涂层的应用前景，提升轮胎模具耐磨减摩性，采用化学气相沉积法
在35#钢基体上制备了厚约1.6μm的DLC涂层，利用SEM、AFM、Raman光谱仪、纳米压痕仪、端面摩擦磨损试验机对DLC涂层的表面微观结构和摩擦学性能进行了研究，试验及测试结果表明，用化学气相沉积法制备的DLC涂层表面光滑致密，颗粒细小均匀，粗糙度小；DLC涂层具有极好的抗磨减摩特性，比35#钢耐磨，纳米硬度和弹性模量高达20.27GPa和184.63GPa；在140℃ 高温条件下，擦系数低至0.4544。DLC涂层优异的抗磨减摩特性可有效提高轮胎模具的工作性能-抗粘胶、易脱模、寿命长，为制造高性能DLC轮胎模具提供摩擦学方面理论依据。
关键词：轮胎模具；DLC涂层；摩擦学性能；表面微观结构
中图分类号：TG174.461
文献标识码：A
DOI:10.19287/j.cnki. 1005 2402.2017.09.034
Study on friction properties of DLC coating on tire mold
(①School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, CHN; ② Shandong Himile Mechanical Science and Technology Co. ,Ltd. , Weifang 261500,CHN)
Abstract: In order to explore the application prospect of DLC coating for tire mold of high performance, improving
the wear and abrasion resistance of the surface of tire mold.DLC coating thickness of 1. 6 μm was pre-pared on 35# steel substrate by plasma - enhanced chemical vapor deposition. The surface microstruc-ture and tribological properties of DLC coating was investigated by SEM, AFM, Raman spectroscopy, nano indentation and end face friction and wear tester. The results show that the surface of DLC coating prepared by PECVD is smooth and compact, the particles are fine and uniform, as well as, the roughness is small. The anti wear and friction reducing properties of the DLC coating are excellent. The nano hardness and elastic modulus of DLC reaches to 20. 27 GPa and 184. 63 GPa, higher than 35# steel. And the friction coefficient of minimum is 0. 454 4 at 140 °C. The excellent properties of anti friction and wear resistance of DLC coatings can effectively improve the work performance of the tire mold, anti viscose, easy demoulding and life long. This paper provides a theoretical basis for tri-bological properties of tire mold of high performance coated with DLC.
Keywords: tire mold; DLC coating; tribological properties; surface microstructure
轮胎模具在轮胎制造过程中易因流动阻力产生橡胶粘附、脱模力增大、硫化质量下降、服役寿命降低等间题，进而轮胎模具性能降低且轮胎质量变差。目前轮胎模具花纹块内表面多制备Teflon涂层，虽然Tef-lon涂层具有表面能低、摩擦系数小、耐腐蚀等优点，但因其硬度低、耐磨性差等劣势并不能使人满意[1-2]。自1980年Enke等3]首次报道了DLC涂层具有极低
的摩擦系数后，海内外学者针对DLC涂层的摩擦学性能进行了大量的研究。类金刚石（diamond-likecar-bon,DLC)涂层是由sp和sp"杂化键结合的亚稳态非晶碳膜，兼具石墨和金刚石的优良特性[4]。由于具有高硬度、高弹性模量、低摩擦系数、耐磨损以及良好的真空摩擦学特性，非常适合作为耐磨涂层，从而引起了摩擦学界的高度重视，被广泛应用于机械、电子、航
*国家自然科学基金（51375284）；山东招远工业技术研究院创新研究基金
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