摘要
Q235B热轧卷板在焊管成型过程中出现严重的横向开裂。通过金相检验、性能检验和扫描电镜分析,确定该断裂为低应力脆性,开裂与钢板中含量较高的非金属夹杂物、不合格的延伸率和冲击功以及热轧控温不理想造成的基板塑性低有关。
Serious transverse crack occurred to Q235B hot rolling coil plate when welded pipes were formed. By a- dopting metallurgical test, property test and scanning electron microscope analysis, it was concluded that the rupture was low stress brittleness, which have relation to a large amount of nonmetallic inclusion existing in steel plate, unqual- ified elongation and impact power as well as lower plasticity of plate blank caused by unideal hot rolling temperature control.
出处
《中国重型装备》
2013年第3期31-33,36,共4页
CHINA HEAVY EQUIPMENT
关键词
Q235B
低应力断裂
热轧工艺
塑性
Q235B
low stress brittle fracture
hot rolling technology
plasticity
