摘要
通过金相观察、X射线衍射分析、能谱分析、洛氏硬度及耐磨性试验,研究了低合金钢表面铸渗层的组织及性能。结果表明,渗层的平均厚度达到2 mm,铸态下渗层的组织主要为珠光体+碳化物+TiN硬质颗粒,硬度达到了HRC44.1,渗层的耐磨性比基体提高了42.7%。经910℃淬火+250℃回火后渗层的组织主要为回火马氏体+碳化物+TiN硬质颗粒,硬度达到了HRC 55.5,渗层耐磨性比铸态下渗层的耐磨性提高了50%,比热处理后基体的耐磨性提高了34.36%。
In this paper,the structure and properties of cast-infiltration layer on low-alloy steel were studied by means of microstructure observation,X-ray diffraction analysis,spectrum analysis,Rockwell hardness test and wear resistance experiment.The results show that the average thickness of infiltration layer reaches 2 mm.The as-cast microstructure of infiltrated layer is composed of pearlite,carbide and TiN hard particle;the hardness reaches HRC 44.1;the wear resistance of infiltration layer increases by 42.74% than that of the matrix.After quenched at 910 ℃ and tempered at 250 ℃,the microstructure of the infiltration layer is composed of tempered martensite,carbide and TiN hard particle.The hardness of the layer reaches HRC 55.5;its wear resistance increases by 50% and 34.36%,respectively than that of the infiltration layer of as-cast sample and the matrix of heat treated sample.
出处
《铸造》
CAS
CSCD
北大核心
2011年第7期680-684,689,共6页
Foundry
关键词
低合金钢
渗层
碳化物
硬度
耐磨性
low-alloy steel
infiltrated layer
carbide
hardness
wear resistance
