摘要
采用不同的固体渗碳热处理工艺对5Cr5MoWSi钢进行表面改性处理,利用维氏显微硬度计测量试样表面硬度,结合压痕形貌分析优选具有较好综合性能的实验方案,进而通过不同载荷下的往复式干摩擦磨损试验,对比处理前后试样的耐磨性能,并结合SEM和XRD等对试样磨损前后表面形貌、物相及摩擦磨损机理变化进行了系统研究。研究结果表明:经P2号实验方案(预热升温1.5h至650℃,保温透烧0.5h,渗碳升温1.5h至1010℃保温渗碳0.5h,空冷至常温)渗碳热处理后的5Cr5MoWSi钢硬度达到862HV10kgf,较热处理前试样表面硬度提高了46%;进一步分析发现该材料磨损机理主要表现为黏着磨损和磨粒磨损;不同载荷下的平均摩擦系数和磨损率相比较于热处理前试样相关性能分别下降约7.8%和约85.7%,说明该热处理工艺不仅能够显著提高5Cr5MoWSi钢表面硬度,而且进一步增强材料耐磨擦磨损性能,材料使用寿命有较大提高。
Surface modification of 5Cr5MoWSi steel by different solid carburizing heat treatment processes,optimize the processes scheme with better comprehensive performance by surface hardness and indentation morphology analysis which measurement by Vickers micro hardness meter.The reciprocating dry friction and wear tests under different loads were used to compare the wear resistance of the samples before and after treatment,systematic study on surface morphology,phase and friction and wear mechanism of samples before and after wear using SEM and XRD.The experimental results show that the hardness of 5Cr5MoWSi steel after carburizing heat treatment by P2 processes scheme reached 862 HV10 kgf,which was 46%higher than that of the sample before heat treatment,and main wear mechanisms are adhesive wear and abrasive wear.The average friction coefficient and wear rate under different loads were reduced by about 7.8%and about 85.7%compared with the samples before heat treatment.It shows that the heat treatment process not only can significantly improve the surface hardness of 5Cr5MoWSi steel,but also further enhance the wear and abrasion resistance of the material,and the service life of the material is greatly improved.
作者
莫德云
弓满锋
吴合槟
宋日汉
MO De-yun;GONG Man-feng;WU He-bing;SONG Ri-han(Electromechanical Engineering Institution,Lingnan Normal University,Guangdong Zhanjiang 524048,China;College of Engineering,South China Agricultural University,Guangdong Guangzhou 510642,China)
出处
《机械设计与制造》
北大核心
2020年第12期95-99,共5页
Machinery Design & Manufacture
基金
广东省自然科学项目(2018A030307017)
湛江市科技攻关项目(2016B01012)
大学生创新创业训练计划项目(201710579542)。
关键词
5Cr5MoWSi钢
摩擦磨损
渗碳表面改性
维氏显微硬度
5Cr5MoWSi Steel
Tribological Properties
Carburization Surface Modification
Vickers Micro Hardness Correspondence
