铸造Fe-C-B耐磨合金增韧研究与进展  

Research and Development of the Toughening of Cast Fe-C-B Wear-resistant Alloys

作　　者：牟楠[1] 卢静[1,2] 周海铭[1] 闵小兵 罗丰华[1] MU Nan LU Jing ZHOU Haiming MIN Xiaobing LUO Fenghua(State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083 Hunan Metallurgy Material Institute, Changsha 410129)

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]湖南省冶金材料研究院,长沙410129

出　　处：《材料导报》2017年第15期68-74,80,共8页Materials Reports

基　　金：2016年湖南省战略性新兴产业与新型工业化专项

摘　　要：新一代耐磨材料Fe-C-B合金具有较高的经济效益和优异的耐磨损性能,但网状硼化物的存在导致其韧性较低,限制了其发展和应用。阐述了Fe-C-B合金B含量优化、高温热处理、合金化、变质处理等增韧方法的研究进展。综合大量研究发现:B含量在2.0%~4.0%范围内时,合金性能较好,硬度可达到60HRC,冲击韧性在6J/cm2左右;在1 000~1 050℃范围内进行高温热处理更利于合金增韧;合金化和变质处理对韧性有一定改善作用。为了进一步提高Fe-C-B合金韧性,需要结合各种增韧方法,深入探讨韧性机制。Fe-C-B alloy,with excellent wear resistance and cost-effectiveness,has the potential to become the new generation of wear-resistant materials,whose broad application is limited due to its relatively low toughness caused by meshed boride.The progress of research on Fe-C-B alloy toughening mechanism is reviewed,including adjustment to boron content,heat treatment under high temperature,alloying and modification.It can be suggested that alloys with boron content ranging in 2.0%—4.0% has good performance,as the hardness reaches 60 HRC and the impact toughness is about 6J/cm2.High temperature heat treatment at1 000—1 050 ℃is favorable for alloy toughening.Also,toughness can be improved to a certain extent through alloying or modification.In-depth studies on the toughening mechanism of Fe-C-B alloy are necessary for further improvement of toughness by combining various toughening methods.

关 键 词：Fe-C-B合金 增韧 高温热处理 合金化 变质处理 耐磨 

分 类 号：TG142.7[一般工业技术—材料科学与工程]