42CrMo喷油器体端面开裂分析与工艺优化  

Cracking analysis and process optimization for the end face of 42CrMo injector body

作　　者：唐霞 陈建军 TANG Xia;CHEN Jianjun(Wuxi Institute of Technology,Wuxi 214000,China;Weifu Mashan Oil Pump&Nozzle Co.,Ltd.,Wuxi 214000,China)

机构地区：[1]无锡职业技术学院机械学院,无锡214000 [2]无锡威孚马山油泵油嘴有限公司,无锡214000

出　　处：《现代制造工程》2021年第11期99-103,147,共6页Modern Manufacturing Engineering

基　　金：江苏省高等学校自然科学研究项目(19KJB460025)。

摘　　要：针对某公司42CrMo喷油器体端面易开裂情况,完成了断口形貌、化学成分和硬度以及金相观察等分析测试,并应用有限元方法对喷油器体密封端面开裂处进行应力分析,发现其两进油孔处应力超出标准;在此基础上对喷油器体热处理和加工工艺优化并应用于实际生产,改进工艺后的喷油器总成性能检测合格。In view of the fact that the end face of injector body made of 42CrMo is easy to crack by a company,the fracture morphology and metallography observation were finished,and the chemical composition and hardness were also tested and analyzed.Additionally,the stress analysis for crack place of seal face of the injector body was carried out by using finite element method,it was found that the stress at the two oil inlet holes exceeded the permissible stress.On this basis,the injector body thermal treatment and processing technology were optimized and implemented in actual production,and the performance test after the improved process of the injector assembly was qualified as a result.

关 键 词：喷油器体 开裂 有限元分析 

分 类 号：TB31[一般工业技术—材料科学与工程]