摘要
某输油管道用法兰套管件,在热加工锻造、调质处理后法兰边缘出现周向开裂。通过化学成分分析和金相检验对法兰套管件开裂的原因进行了分析。结果表明:工件在锻造加工过程中,加热温度过高,加热时间过长,工件过热过烧,形成晶间氧化,晶间结合力显著降低,组织脆化,导致热加工锻造开裂。
The circumferential cracking was found on the edge of flange sleeve parts for oil pipeline after the hot forging, quenching and tempering. Through chemical composition analysis and metallographic examination, the cracking reason of flange sleeve parts was analyzed. The results showed that the intergranular oxidation was formed in flange sleeve parts, which was overheating or overburning in the forging process, because the heating temperature was too high and the heating time was too long. The intergranular binding capacity decreased significantly, the microstructure was embrittled, led to hot forging cracking in the parts.
出处
《理化检验（物理分册）》
CAS
2015年第7期504-507,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
法兰套管
过热
过烧
晶间氧化
锻造开裂
flange sleeve
overheating
overburning
intergranular oxidation
forging cracking
