摘要
20 t EAF-VOD-LF-VD-铸棒-2. 5 t电渣重熔锭锻成Φ200 mm圆棒上发现大量表面横向裂纹,采用扫描电镜对裂纹的微观形貌进行观察,分析结果表明,裂纹是由于锻造前加热温度过高,导致了晶界熔融而造成的。通过试验和生产实践得出,022Cr25Ni22Mo2N钢电渣锭加热温度由原1 180℃降至1 110℃时,消除了锻材裂纹。
It is found that a large amount of surface transverse cracks at φ200 mm round bar forged from 2.5 t ESR ingot remehed from 20 t EAF-VOD-LF-VD-casting electrode. To observe the morphology of cracks by scanning electron microscope the analysis results show that overheating of ingot before forging leads to melting of grain boundary to form forging cracks. It is obtained by test and production practice that as steel 022Cr25Ni22Mo2N ingot heating temperature decreases from original 1 180℃ to 1 100℃ the forgings cracks are eliminated.
作者
张军
李造宇
杨娥
张永强
贾余超
Zhang Jun;Li Zaoyu;Yang E;Zhang Yongqiang;Jia Yuchao(Hubei Key Laboratory of High Quality Special Steel;Forging Works,Daye Special Steel Co Ltd,Huangshi 435001)
出处
《特殊钢》
北大核心
2018年第6期40-42,共3页
Special Steel
