Cui Kai,Ren Weihe*.Electroless plating of Ni-W-P/PTFE composite coatings on Cr12MoV die steel and their wear resistance[J].Plating & Finishing,2023,(10):32-39.[doi:10.3969/j.issn.1001-3849.2023.10.006]
Cr12MoV模具钢化学镀Ni-W-P/PTFE复合镀层及耐磨性能研究
- Title:
- Electroless plating of Ni-W-P/PTFE composite coatings on Cr12MoV die steel and their wear resistance
- 关键词:
- Ni-W-P/PTFE 复合镀层; 化学镀; Cr12MoV 模具钢; 耐磨性能
- Keywords:
- Ni-W-P/PTFE composite coating ; electroless plating ; die steel ; wear resistance
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 以 Cr12MoV 模具钢作为基体化学镀 Ni-W-P/PTFE 复合镀层，以期提高模具的耐磨性能。通过改变 PTFE 颗粒添加量获得不同 Ni-W-P/PTFE 复合镀层，并对复合镀层的表面形貌、化学成分、晶相结构、硬度及耐磨性能进行表征。结果表明：不同复合镀层表面都存在尺寸不同、分布不均匀的胞状物，还附着白色 PTFE 颗粒，但是晶相结构无显著性差异。随着 PTFE 颗粒添加量从 2 g/L 增至 14 g/L ，复合镀层中 PTFE 颗粒含量呈现先升高，后降低趋势，并且颗粒分散状况不同，硬度呈现减小趋势，而耐磨性能逐步提高，然后变差。当 PTFE 颗粒添加量为 8 g/L 获得的 Ni-W-P/PTFE 复合镀层中 PTFE 颗粒含量达到 3.63% ，并且颗粒分布趋于均匀，具有优良的耐磨性能，其摩擦系数仅为 0.41 ，表面磨痕宽度和深度分别为 500 μ m 和 14.7 μ m ，作为表面改性层能有效减轻 Cr12MoV 模具钢的磨损程度。
- Abstract:
- ： Cr12MoV die steel was used as the substrate for electroless plating of Ni-W-P/PTFE composite coating to improve the wear resistance of the die. Different Ni-W-P/PTFE composite coatings were obtained by changing the additive amount of PTFE particles ， and the surface morphology ， chemical composition ， crystal structure ， hardness and wear resistance of the composite coating were characterized and tested. The results show that there are cellulars with different size and uneven distribution on the surface of different composite coatings ， and white PTFE particles are adhered ， but the crystal phase structure of different composite coatings has no significant difference. With the increase of additive amount of PTFE particles from 2 g/L to 14 g/L ， the content of PTFE particles in the composite coating increases first and then decreased ， the distribution status of PTFE particles is different ， the hardness shows a decreasing trend ， and the wear resistance gradually improved and then deteriorated. The content of PTFE particles in the Ni-W-P/PTFE composite coating obtained when the additive amount of PTFE particles is 8 g/L reaches 3.63% ， and the particles is evenly distributed. The composite coating has excellent wear resistance ， its friction coefficient is only 0.41 ， and the surface wear width and depth are 500 μ m and 14.7 μ m ， respectively ， which can effectively reduce the wear degree of Cr12MoV die steel as surface modification coating.
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备注/Memo
收稿日期： 2023-05-23 修回日期： 2023-06-12 作者简介： 崔凯（ 1983 —），男，讲师，主要研究金属材料、机械设计与制造， email ： Trainingmaterial07@163.com * 通信作者： 任伟和（ 1984 —），男，副教授，主要研究金属材料检测分析、表面工程等， email ： Edu_ren1984@126.com 基金项目： 2023 年度广西高校中青年教师科研基础能力提升项目（ 2023KY1109 ）