摘要
针对抽油泵、水煤浆泵等产品在工作过程中常见的腐蚀+磨粒磨损问题,采用雾化法研制了一种FeCr-Si-B系合金粉末。采用等离子弧喷焊方法分别制备喷焊耐磨层,并对合金粉末喷焊耐磨层进行渗透探伤以及化学成分、显微组织、硬度、耐磨性分析。结果表明,合金粉末的喷焊显微组织均由Cr3Si硬质相和A2基体韧性相组成,晶粒细小,抗裂性能优越,硬度值为58.1HRC;耐磨性为0.428 mg/100S,与Fe-36Cr-5C过共晶合金喷焊层耐磨性相当。该Fe-Cr-B-Si系合金粉末适合于腐蚀环境下低应力磨粒磨损工况的表面强化。
Corrosion and wear down was the main problem when oil well pump and coal water slurry pump was working. The method of atomization was used to develop one kind of Fe-Cr-Si-B alloy powders. A plasma spray welding technology was used to prepare wear- resisting overlays,and Dye-penetrant test,chemical components,microstructure,hardness and wear resistance were evaluated and compared to the welding overlays. The results show that the microstructure of the spray welding layers are consisted of Cr3Si and A2,the grain is wee,toughness is well,and the hardness is 58.1 HRC,the loss mass of spray welding layers is 0.428 mg/lOOS. Compare with spray welding layers of Fe-36Cr-5C,the loss mass don＇t have dissimilarity. The kind of Fe-Cr-Si-B is suitable for the surface strengthening in the condition of corrosion and abrasive wear.
出处
《电焊机》
2017年第10期119-122,共4页
Electric Welding Machine
关键词
等离子弧喷焊
显微组织
硬度
耐磨性
plasma spray welding
microstructure
hardness
resistance
