摘要
利用HgNO3试验法对HgNO3引致铅黄铜(HPb59-1)内应力腐蚀开裂行为进行了研究.采用光学显微镜以及扫描电镜分析了腐蚀后铅黄铜的组织和断口形貌.结果表明:Hg沿晶界扩散削弱了基体原子间的结合力,同时Pb在晶界处偏聚,促使晶界脆化,从而加速了合金的开裂;断口致密度分析表明:该HPb59-1黄铜具有明显的分层等缺陷,说明黄铜在锻造过程中存储了大量的内应力.
Stress corrosion cracking of HPb59-1 brass is studied by using the HgNO3 test method in this paper. Microstruetures and fractured surfaces of the HPb59-1 brass were investigated by using of optical microscopy （OM） and scanning electron microscopy （SEM）. The result shows that the binding force among atoms is weakened because of Hg diffusion along the grain boundary. The Pb clustering is formed at grain boundaries and the grain boundary embitterment occurs. The brass cracking is accelerated. Fracture density shows that the HPb59-1 brass with delaminating defects is observed obviously. The internal stress of the HPb59-1 brass is stored in the forging process.
出处
《吉林化工学院学报》
CAS
2013年第11期41-43,共3页
Journal of Jilin Institute of Chemical Technology
关键词
黄铜
HgNO3法
内应力
腐蚀开裂
brass
HgNO3 test method
internal stress
corrosion cracking
