| HgNO_3法测定黄铜内应力腐蚀开裂的研究 |
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| 引用本文： | 王文革,索忠源,张丽娜,刘文异.HgNO_3法测定黄铜内应力腐蚀开裂的研究[J].吉林化工学院学报,2013(11):41-43. |
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| 作者姓名： | 王文革 索忠源 张丽娜 刘文异 |
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| 作者单位： | [1]吉林化工学院机电工程学院,吉林吉林132022 [2]东北工业集团有限公司吉林江机公司计量测试中心,吉林吉林132021 |
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| 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.
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| 关 键 词： | 黄铜 HgNO3法 内应力 腐蚀开裂 |
Study of Stress Corrosion Cracking of HPb59-1 Brass in HgNO3 Solution |
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| Affiliation: | WANG Wen-ge1 , SUO Zhong-yuanl , ZHANG Li-na2, ZHANG Ai-wu2 (1. College of Mechanical and Electrical Engineering, Jilin Institute of Chemical Technology, Jilin City 132022, China; 2. Measurement Test Center, Northeast Industrial Group Co. , Ltd. Jilin Jiangji Company,Jilin City 132021, China) |
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| Abstract: | 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. |
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| Keywords: | brass HgNO3 test method internal stress corrosion cracking |
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