摘要
对某型H68黄铜弹壳进行检查时发现大量弹壳存在裂纹。通过对弹壳进行宏观和微观观察、能谱分析、金相检验和残余应力测定等,分析了弹壳开裂的原因。结果表明:弹壳的开裂性质为应力腐蚀开裂,其原因是由于收口位置存在一定的残余拉应力,且该位置的晶粒尺寸较大,在外界介质的协同作用下产生了应力腐蚀裂纹。
Lots of cracks were found on H68 brass cartridge cases.By means of macro and micro observation,energy spectrum analysis,metallographic examination and residual stress measurement,the cracking cause was analyzed.The results showed that the cracking mode of the cartridge case was stress corrosion cracking.The stress corrosion cracking generated at the mouth of the cartridge case because of the residual tensile stress,large grain size and the corrosion medium.
出处
《理化检验（物理分册）》
CAS
2011年第3期180-183,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
弹壳
黄铜
裂纹
应力腐蚀开裂
cartridge case
brass
crack
stress corrosion cracking
