摘要
H62黄铜管用作液化石油气输送管使用不久后,在靠近烧嘴附近产生了开裂。采用等离子光谱、金相、扫描电镜和能谱等方法对黄铜管开裂原因进行了分析。结果表明,黄铜管发生了明显的脱锌现象,基体强度明显降低。黄铜管中有害杂质元素铅含量略微偏高,且分布在晶界,容易引起黄铜管的热脆性。在内应力存在的条件下,黄铜管发生破裂。最后提出了相应的改进的建议。
Just after several days of operation, Severe cracks of liquefied gas transmission pipe made from the alloy of H62 brass were discovered near the burner. Several method including ICP-AES, optical microscopy （OM）, scanning electronical microscopy （SEM） and energy-dispersive X-ray analysis （EDX） were used to analyze the cracking. The results showed that there was obvious dezincification in the alloy, which had lowed the strength of the alloy. Additionally, the harmful element Pb was a little higher than the standard, which caused thermal brittleness. The alloy failed for the interactions of residual stress in it with corrode substance in liquefied gas. At last, suggestions were proposed to improve the quality of the alloy.
出处
《理化检验（物理分册）》
CAS
2008年第8期439-442,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
H62黄铜
开裂
脱锌
热脆
Brass H62
Cracking Dezincification
Thermal brittleness
