低温电解磁化渗硫工艺及减摩特性的研究  

Study on low temperature electrolytically magnetic sulphurizing and friction-reduction behaviour of 20CrMnTi steel sulfurized layer

作　　者：黄友庭[1] 陈文哲[1,2] 

机构地区：[1]福建工程学院材料科学与工程学院,福建福州350118 [2]厦门理工学院材料科学与工程学院,福建厦门361024

出　　处：《福建工程学院学报》2014年第1期1-5,共5页Journal of Fujian University of Technology

基　　金：福建工程学院引进人才科研启动基金(GY-Z13106)

摘　　要：采用外加磁场对碳氮共渗的20CrMnTi钢进行磁化低温电解渗硫处理,着重探讨了磁化低温电解渗硫工艺的影响因素,特别是添加剂和磁化作用的影响,进而优化工艺参数,并利用摩擦磨损试验研究该渗硫层的减磨特性。结果表明,添加剂K3Fe(CN)6有效降低盐浴粘度,提高电导;外加磁场改善了电解质的分散能力,提高盐浴的电导和稳定性,促进渗硫过程的进行,延长盐浴寿命。外加磁场的低温电解渗硫最佳工艺参数为电流密度0.2 A/dm2,外加磁感应强度0.07 T,添加剂1%K3Fe(CN)6,温度190℃,时间15 min。获得20μm左右厚度均匀的渗硫层,明显降低摩擦系数并显著提高了工件的抗磨损和抗咬合能力。20CrMnTi steel was sulfurized after carbonitriding by a low temperature electrolytic sul- phurizing process with an applied （external） magnetic field. The effects of different parameters on the sulphurizing process of 20CrMnTi steel, particularly additives and magnetizing, were systemati- cally investigated. Wear experiments were conducted to study the antifriction properties of the sulfu- rizing layer. The results show that additive K3Fe（CN）6 can reduce effectively the viscosity but im- prove the conductivity of the salt bath, that the applied magnetic field can improve the dispersion a- bility of the electrolyte, the conductivity and stability of the salt bath, and can promote the sulphuri- zing process. Moreover, the optimum parameters of the low temperature electrolytic magnetizing sul- phurizing processing are indicated： current density 0.2 A/dm2, magnetic induction intensity 0.07T, additive 1% K3Fe（ CN）6, temperature 190℃, and duration 15 minutes. A uniform sulfurizing lay- er of sample with a thickness of about 20 μm was obtained, which reduces obviously the friction co- efficient and improves significantly the wear and occlusion resistance.

关 键 词：20CrMnTi 磁化 低温电解渗硫 减磨性 

分 类 号：TG156.84[金属学及工艺—热处理]