摘要
采用高频感应熔覆技术在45钢表面制备了TiN增强Ni基合金涂层,利用OM、EDS、SEM和XRD分析了涂层的微观结构和化学组成;利用显微硬度计和摩擦磨损机研究了TiN添加量对涂层硬度和耐磨性的影响。结果表明:感应熔覆Ni基涂层无裂纹、气孔等缺陷出现,与基体达到了冶金结合;涂层主要为胞状树枝晶,由γ-Ni、Ni_2B、Cr_(23)C_6、CrB等构成;Ni基涂层的硬度较高,耐磨性能良好,随着涂层中TiN含量的增加,涂层的硬度增大,耐磨性增强;与不添加TiN的Ni基涂层相比,40%TiN+Ni基涂层的最大硬度值提高了37.3%,摩擦因数降低了48.3%,摩擦磨损质量损失减小了28.0%。
TiN enhanced Ni-based alloy coating was manufactured on 45 steel by frequency induction cladding technology. The microstructure and chemical composition were analyzed by OM,EDS,SEM and XRD. The effect of TiN contents on the hardness and wear resistance of Ni based coating were studied by micro-hardness tester and wear test machine. The results show that the coating is metallurgically bond with the substrate,without free pore and crack in the coating. The coating is mainly consisted of cellular dendrite,and composed of γ-Ni,Ni_2B,Cr_（23）C_6and Cr B. The Ni-based coating has high micro-hardness and fine wear resistance. With the TiN content increasing in Ni based coating,the hardness is higher and the wear resistance is better. Compared with Ni-based coating with none TiN,in40% TiN ＋ Ni based coating,the maximum hardness increased by 37. 3%,the friction coefficient and the weight loss of friction wear are declined by 48. 3% and 28. 0%,respectively.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第7期38-42,共5页
Heat Treatment of Metals
基金
四川省教育厅重点项目(15ZA0057)
四川省高等学校油气田材料重点实验室项目(X151516KCL01)
关键词
感应熔覆
NI基涂层
TIN
显微硬度
耐磨性
induction cladding
Ni based coating
TiN
microhardness
wear resistance
