激光功率对Fe68 Pro合金熔覆层显微组织和力学性能的影响

高正华，王飞宇，赵汉卿，孟玲玉，胡明

佳木斯大学材料科学与工程学院

通信作者: 胡明（1962-），博士，教授，研究方向：表面改性技术，E-mail：minghu02@jmsu.edu.cn

Research on Parameter Regulation and Structural Properties of Pulse Electrodeposited Zn-Ni-PTFE Composite Coatings

GAO Zhenghua, WANG Feiyu, ZHAO Hanqing, MENG Lingyu, HU Ming

College of Materials Science and Engineering, Jiamusi University

Corresponding authors: HU Ming (1962-), Ph.D., Professor, Research Focus: Surface Modification Technology, E-mail: minghu02@jmsu.edu.cn

文章历史：收稿日期：2025-03-21

摘  要

钢铁冶金行业中大量热传输辊材质为Q235钢和球磨铸铁，尽管这些材料价格较低，但存在着服役性能低、寿命短、更换频繁等问题。为提高热传输辊的性能、延长服役寿命，采用激光熔覆技术在Q235钢表面制备Fe68 Pro合金熔覆层，对Q235进行表面改性。利用金相显微镜、扫描电子显微镜、显微硬度仪、X射线衍射仪和摩擦磨损试验机研究不同激光功率对熔覆层组织结构、显微硬度及摩擦磨损性能的影响。结果表明，Fe68 Pro合金熔覆层具有由平面胞状晶、柱状晶，向柱状晶、树枝晶和细小等轴晶过渡的组织特征，主要由α-Fe、Fe-Cr和Cr-Ni-Fe-C相组成；熔覆层与基体形成良好的冶金结合，与基体相比，熔覆层的显微硬度和耐磨性显著增加；当激光功率为1 400 W、扫描速度为10 mm/s时，可以获得最佳力学性能的熔覆层，显微硬度达到602 HV_0.3，较Q235钢基体实现了265%的提升，耐磨性也显著提高，这为钢铁冶金行业中高性能长寿命热传输辊的工业应用奠定了一定的基础。

Abstract

In the iron and steel metallurgy industry, a significant number of heat transfer rollers are made from Q235 steel and nodular cast iron. Although these materials are low-cost, they suffer from issues such as poor service performance, short service life, and the need for frequent replacement. To enhance the performance and extend their service life of heat transfer rollers, an Fe68 Pro alloy cladding layer was prepared on the surface of Q235 steel for surface modification using the laser cladding technology. The effect of laser power on microstructure and microhardness and tribological properties were analyzed using a metallographic microscope, scanning electron microscope, microhardness testing machine, X-ray diffraction, and friction and wear testing machines. The results show that, the Fe68 Pro alloy cladding layer has the structural characteristics of transitioning from planar cellular crystals and columnar crystals to columnar crystals, dendritic crystals, and fine equiaxed crystals. The cladding layer was mainly composed of α-Fe, Fe-Cr, and Cr-Ni-Fe-C phases. The fusion layer formed a good metallurgical bond with the substrate. Compared with the substrate, the microhardness and wear resistance of the cladding layer were significantly increased. When the laser power was 1 400 W and the scanning speed was 10 mm/s, the best mechanical properties of the cladding layer was obtained with a microhardness of 602 HV_0.3, which was 265% higher than that of Q235 steel substrate. The wear resistance is significantly improved, laying a certain foundation for the industrial application of high-performance long-life heat transfer rollers in the steel metallurgy industry.

关键词

Fe68 Pro合金粉 ; 激光熔覆 ; 组织结构 ; 显微硬度 ; 耐磨性

Keywords

Fe68 Pro alloy powder ; laser cladding ; microstructure ; microhardness ; wear resistance

引用本文

高正华, 王飞宇, 赵汉卿, 孟玲玉, 胡明. 激光功率对Fe68 Pro合金熔覆层显微组织和力学性能的影响[J]. 表面工程与再制造, 2025, 25(3): 45-52. https://doi.org/10.26935/j.issn.2097-5317.2025.0016

GAO Zhenghua, WANG Feiyu, ZHAO Hanqing, MENG Lingyu, HU Ming. Effect of Laser Power on Microstructure and Mechanical Properties of Fe68 Pro Alloy Cladding Layer[J]. Surface Engineering & Remanufacturing, 2025, 25(3): 45-52. https://doi.org/10.26935/j.issn.2097-5317.2025.0016

中图分类号

TG175.1

基金项目

国家自然科学基金项目(51271088)

【全文下载】