大功率柴油机气缸盖的残余应力  

Residual Stress of Cylinder Head of High-power Diesel Engine

作　　者：潘斯宁[1] 陈清锋[1] 俸文斌[1] 

机构地区：[1]广西玉柴机器股份有限公司,玉林537005

出　　处：《理化检验（物理分册）》2012年第6期351-354,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：以解决气缸盖漏水问题为切入点,采用盲孔法研究了热时效退火工艺、机加工制造以及使用过程对气缸盖残余应力的影响。结果表明:采用较高保温温度、较长保温时间、较低降温速率、并保持较低出炉温度的热时效退火工艺可以使气缸盖毛坯件的残余应力保持在较低水平;机加工后气缸盖的残余应力有所增大;由于对气缸盖热时效退火工艺的优化,有效地控制了气缸盖底面的残余应力,故经过1 000h的台架试验后,未再发生气缸盖鼻梁区开裂现象,说明通过热时效退火工艺的优化来降低气缸盖底面的残余应力,能有效地解决气缸盖漏水的问题。Aiming to solve the leakage problem of cylinder head,the effect of thermal annealing process,machine manufacturing process and testing process on residual stress of the cylinder head was analyzed by using blind-hole method.The results show that the thermal annealing process,which was with higher holding temperature,longer holding time,lower cooling rate and lower out-of-furnace temperature,was able to keep lower residual stress of the rough cylinder head.The residual stress of the cylinder head was increased after machine manufacturing process.Through the optimization of thermal annealing process,residual stress of bottom surface of the cylinder head was effectively controlled.No crack was found after 1 000 h bench testing,indicating that the optimization of thermal annealing process can greatly reduce the residual stress of bottom surface of the cylinder head and effectively solve the leakage problem of the cylinder head.

关 键 词：气缸盖 残余应力 盲孔法 热时效退火工艺 

分 类 号：TG156.23[金属学及工艺—热处理]