摘要
为揭示国内外内燃机针阀体的质量水平,供设计、开发针阀体参考,检测了国内外5个厂生产的针阀体的化学成分、非金属夹杂物、显微组织和硬度。结果表明:国外针阀体的合金元素含量比国内针阀体的高,因此淬透性较好,非金属夹杂物含量较少,耐磨性、抗疲劳性能好,显微组织均匀细小,力学性能和工艺性能均优于国内产品。
Five pieces of internal combustion engine nozzles produced at home and abroad were tested for chemical composition,non-metallic inclusions,microstructure,and hardness to discover their quality level thereby to give a reference to design and development of nozzle.The results indicated that as compared with the domestic nozzles,the foreign nozzles exhibited higher alloying element contents thereby better hardenability,less non-metallic inclusions,better resistance to wear and fatigue,relatively uniform and finer microstructure,and better mechanical and fabrication properties.
作者
王树平
余成龙
WANG Shu ping;YU Chenglong(FAW Wuxi Fuel Injection Equipment Research Institute ,Wuxi 214063, Jiangsu China)
出处
《热处理》
CAS
2019年第4期48-53,共6页
Heat Treatment
关键词
针阀体
化学成分
非金属夹杂物
显微组织
nozzle
chemical composition
non-metallic inclusion
microstructure
