摘要
对38CrMoAl钢进行460℃氮碳共渗(0.1 L/min氨气+0.025 L/min乙醇)后氧化(0.015 L/min氨气+0.15L/min空气)改性层的制备及表征。4,8,12 h后的共渗层增重分别是0.88,0.97,1.29 mg/cm^2;与未表面处理试样相比增重明显。4,8,12 h共渗层的表面硬度分别为1362,1283,1289 HV_(0.05),共渗层截面的硬度从表面缓慢下降到基体(≈381.3 HV_(0.05))。4,8,12 h后改性层的厚度分别为140.1,150.2,200.4μm。氮碳共渗后氧化层包括Fe_3O_4和ε-Fe_(2-3)N,Fe_3O_4为主要相,ε-Fe_(2-3)N为次要相。38CrMoAl钢460℃氨气氮碳共渗后氧化8 h后,表面层中Fe_3O_4的比例相对较大,耐蚀性提高。
Plasma nitrocarburizing with NH3 and post-oxidizing for 38CrMoAl steel are carried out at 460℃for 4 h8 h and 12 h.Layer depth and mass gain increases with the increasing of nitrocarburizing time,reaching to 200.4μm and 1.29 mg/cm2,respectively.The microhardness of the modified layer is significantly increased with the greates value of 1362 HV0.05.The microstructure in the modified layers mainly consists of Fe3O4 andε-Fe2-3N.The corrosion resistance is remarkably enhanced for the nitrocarburized with NH3 and post-oxidized layer on 38CrMoA steel at 460℃for 8 h,because of the greater proportion of Fe3O4 phase.
作者
王诗茜
由园
都鑫
WANG Shi-xi;YOU Yuan;DU Xin(School of Materials Science and Engineering, Qiqihar University, Heilongjiang Qiqihar 161006, China;School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China)
出处
《齐齐哈尔大学学报（自然科学版）》
2019年第2期60-63,共4页
Journal of Qiqihar University(Natural Science Edition)
基金
国家自然科学基金(51401113和51371070)
黑龙江省自然科学基金(E2016069和E2015044)
黑龙江省博士后资助经费(LBH-Z16061)
黑龙江省教育厅基本科研业务专项(齐齐哈尔大学科研项目资助)(135209204)
2018年黑龙江省大学生创新创业训练计划项目(201810232096)
关键词
38CrMoAl
钢
氮碳共渗
后氧化
耐蚀性
38CrMoAl steel
nitrocarburizing
post-oxidizing
corrosion resistance
