激光熔覆高强韧铁基涂层精细组织调控与性能研究

doi:10.11900/0412.1961.2021.00549

金属学报

2022, Vol. 58

Issue (4): 513-528 DOI: 10.11900/0412.1961.2021.00549

综述

本期目录 | 过刊浏览

激光熔覆高强韧铁基涂层精细组织调控与性能研究

冯凯¹^,²^,³, 郭彦兵⁴, 冯育磊¹^,²^,³, 姚成武¹^,²^,³, 朱彦彦¹^,²^,³, 张群莉⁵, 李铸国¹^,²^,³(

)

^1.上海交通大学材料科学与工程学院上海 200240
^2.上海交通大学上海市激光制造与材料改性重点实验室上海 200240
^3.高新船舶与深海开发装备协同创新中心上海 200240
^4.上海电机学院材料学院上海 201306
^5.浙江工业大学激光先进制造研究院杭州 310014

Microstructure Controlling and Properties of Laser Cladded High Strength and High Toughness Fe-Based Coatings

FENG Kai¹^,²^,³, GUO Yanbing⁴, FENG Yulei¹^,²^,³, YAO Chengwu¹^,²^,³, ZHU Yanyan¹^,²^,³, ZHANG Qunli⁵, LI Zhuguo¹^,²^,³(

)

^1.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
^2.Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiao Tong University, Shanghai 200240, China
^3.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China
^4.School of Materials Science, Shanghai DianJi University, Shanghai 201306, China
^5.Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou 310014, China

引用本文:

冯凯, 郭彦兵, 冯育磊, 姚成武, 朱彦彦, 张群莉, 李铸国. 激光熔覆高强韧铁基涂层精细组织调控与性能研究[J]. 金属学报, 2022, 58(4): 513-528.
Kai FENG, Yanbing GUO, Yulei FENG, Chengwu YAO, Yanyan ZHU, Qunli ZHANG, Zhuguo LI. Microstructure Controlling and Properties of Laser Cladded High Strength and High Toughness Fe-Based Coatings[J]. Acta Metall Sin, 2022, 58(4): 513-528.

全文: PDF(6058 KB) HTML

摘要:

激光熔覆作为一种高精度成形与低损伤控性的表面强化技术，可以赋予零部件表面更高的性能。铁基涂层作为一种低成本的涂层体系一直广泛地应用于各种机械零部件的表面强化领域。随着零部件对高性能和长寿命的追求，对激光熔覆涂层材料的设计及性能也提出了更高要求。本文综述了作者团队近年来设计和制备的纳米贝氏体铁基涂层、超细共晶增强铁基涂层、颗粒增强马氏体涂层及高硬度非晶铁基涂层，并从设计思路、涂层组织结构和力学性能等方面详细介绍了研究结果，并对未来发展方向进行了展望。

关键词 ：激光熔覆, 表面技术, 铁基涂层, 组织调控, 高强韧

Abstract：

Laser cladding is a powerful surface strengthening technology that combines with high precision forming and low substrate damage to endow components with high surface performance. Fe-based coatings have been widely used in the surface engineering of many mechanical components. As the demand for higher performance and longer service life for components increases, the design and fabrication of new laser cladded coatings are expected to improve. This paper reviews recent research results of our team on laser cladding of novel Fe-based coatings, such as nano-bainite Fe-based coating, ultra-fine eutectic Fe-based coating, particle reinforced martensite coating, and high-hardness amorphous Fe-based coating. The study results are presented from the perspectives of the design, microstructure, and mechanical properties of these novel coating materials.

Key words： laser cladding surface technology Fe-based coating microstructure controlling high strength and high toughness

收稿日期: 2021-12-11

ZTFLH:

TG178

基金资助:国家重点研发计划项目(2018YFB0407300)

作者简介: 冯凯，男，1984年生，副教授，博士

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图1 不同等温温度和时间下所得到的纳米贝氏体组织形貌[46]及枝晶间残余奥氏体形成机制[48]

图2 不同等温温度下所得到的纳米贝氏体铁素体极图及生长取向分布图[49]

图3 不同等温温度下得到的纳米贝氏体显微组织的TEM像及选区电子衍射(SAED)花样[49]

图4 激光熔覆及不同等温温度下所得到的纳米贝氏体相转变动力学曲线

图5 激光熔覆及不同等温温度下所得到的纳米贝氏体涂层的Vickers硬度和拉伸强度

图6 不同道次熔覆涂层的微观结构及相分布[60]

图7 超细共晶增强铁基涂层的TEM像和SAED花样[60]

图8 不同道次涂层的残余应力[60]

图9 涂层的硬度分布[60]

图10 纳米硬度和纳米压痕SEM像[60]

图11 涂层和基体的耐磨性[60]

表1 传统工具钢涂层和本研究涂层的硬度和耐磨性[68]

图12 颗粒增强马氏体涂层的微观结构分析[73]

图13 颗粒增强马氏体涂层熔覆层的显微组织[73]

图14 涂层的硬度分布[74]

图15 涂层的应力-应变曲线及断口形貌[74]

图16 不同熔覆速率下熔覆层的XRD谱[76]

图17 不同熔覆速率下熔覆层横截面形貌图[76]

图18 熔覆层中不同深度的XRD分析[77]

表2 熔覆层中不同区域非晶相含量与晶体相的晶粒尺寸[76]

图19 熔覆层横截面不同位置的显微硬度和形貌[80]

图20 基体和熔覆层不同区域的摩擦系数-时间曲线[76]

表3 摩擦力、磨损失重和摩擦系数的数据统计[76]

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