金属表面梯度渗氧强化  

Surface Gradient Oxygen-Charging Strengthening of Metals

作　　者：王佩 林希衡 韩卫忠 WANG Pei;LIN Xiheng;HAN Weizhong(State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710016,China)

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710016

出　　处：《中国材料进展》2024年第11期995-1006,共12页Materials China

基　　金：国家自然科学基金资助项目(51922082,51971170);国家重点研发计划资助项目(2017YFB0702301)。

摘　　要：金属材料的表面强化技术包括表面化学热处理技术、表面淬火强化技术、表面涂层强化技术、表面形变强化技术和表面剧烈塑性变形技术等,着重推介了一种全新的表面强化技术——金属表面梯度渗氧强化。金属表面梯度渗氧强化技术有别于传统的渗碳、渗氮和热氧化技术,是一种提高金属材料表面性能的经济且高效的新方法。首先回顾了金属表面热氧化及氧扩散技术的发展历史、应用现状和潜在不足,随后详细介绍了近年发展起来的新型金属表面梯度渗氧强化技术,并阐明该技术的渗氧机理和固溶氧强化原理。金属表面梯度渗氧强化技术具有适用范围广、渗氧效率高、强韧化效果显著、工艺简单、成本低廉、经济环保、节能高效和生物相容性强等优点,是一种极具发展潜力的新型金属表面强化技术。The surface strengthening technology of metals includes surface chemical heat-treatment,surface quenching strengthening,surface coating strengthening,surface deformation strengthening and surface severe plastic deformation.This paper focuses on introducing a brand-new surface strengthening technology:surface gradient oxygen-charging strengthening.Different from the traditional carburization and nitriding technologies,the surface gradient oxygen-charging technology is an economic and efficient new way to improve the surface properties of metals.This paper first reviews the development history,application status and shortcomings of the thermal oxidation and oxygen diffusion hardening methods.Then the paper introduces the newly developed surface gradient oxygen-charging technology in detail,and expounds the underlying oxygendiffusion mechanism and solid solution hardening mechanism.The surface gradient oxygen-charging strengthening technology has the advantages of wide application range,high oxygenation efficiency,significant strengthening and toughening effect,simple processing,low cost,economic,energy saving and good biocompatibility.It has a great application potential as a new way of surface strengthening of metals.

关 键 词：金属 渗氧 表面强化 氧梯度 固溶强化 

分 类 号：TG178[金属学及工艺—金属表面处理]