锻压技术

C12MoV模具钢激光熔覆复合超硬层的耐磨性研究

英文标题：Study on wear resistance of laser cladding composite superhard layer of C12MoV die steel

作者：毕彦邵振江段文利姜立忠周小玉

单位：天津中德应用技术大学天津市精密级进模具成型技术工程中心天津市金属材料高效近净成形技术工程中心天津市津兆机电开发有限公司天津开山金属模具科技有限公司天津理工大学

分类号：V261.93+3

出版年,卷(期):页码：2019,44(8):146-149

摘要：

常规热处理的C12MoV模具钢由于磨粒和咬合磨损失效、寿命很低。以C12MoV模具钢为基体制备复合超硬层，来提升模具的耐磨性。采用SKD11粉末激光熔覆的方法形成毫米级熔覆层，再采用TD热扩散方法在激光熔覆层上形成微米级的超硬碳化钒层，构成复合超硬层。实验结果表明：基体和熔覆层、熔覆层和超硬层的结合均有扩散产生，结合紧密，并且基体-熔覆层-碳化钒层可形成硬度梯度，熔覆层对表面的TD超硬层形成有效支撑，该复合超硬层的磨损寿命显著提高，是基体的30倍，是单纯TD涂层的3倍。

The C12MoV die steel with conventional heat treatment had a short life due to the failure of abrasive particles and occlusal wear. A composite superhard layer was prepared by using C12MoV die steel as the matrix to improve the wear resistance of die. The SKD11 powder laser cladding method was used to form the millimeterscale cladding layer, and then the microscale superhard CV layer was formed on the laser cladding layer by the TD thermal diffusion method to form a composite superhard layer. It has been proved by experiments that the combination of matrix and cladding layer, cladding layer and superhard layer are diffused, and the combination is tight. Moreover, the matrixcladding layerCV layer can form a hardness gradient, and the TD superhard layer on the surface is supported by the cladding layer, so the composite superhard layer has a longer wear life of thirty times that of the matrix and is three times that of the simple TD coating.

基金项目：

天津市科技计划项目（17PTYPHZ00070）；天津中德应用技术大学项目（313/H183030）

作者简介：毕彦（1985-），男，硕士，助教 E-mail：jy00898706@163.com

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