中国重型装备
中國重型裝備
중국중형장비
CHINA HEAVY EQUIPMENT
2013年
3期
31-33,36
,共4页
Q235B%低应力断裂%热轧工艺%塑性
Q235B%低應力斷裂%熱軋工藝%塑性
Q235B%저응력단렬%열알공예%소성
Q235B%low stress brittle fracture%hot rolling technology%plasticity
Q235 B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。
Q235 B熱軋捲闆在銲管成型過程中齣現嚴重的橫嚮開裂。通過金相檢驗、性能檢驗和掃描電鏡分析，確定該斷裂為低應力脆性，開裂與鋼闆中含量較高的非金屬夾雜物、不閤格的延伸率和遲擊功以及熱軋控溫不理想造成的基闆塑性低有關。
Q235 B열알권판재한관성형과정중출현엄중적횡향개렬。통과금상검험、성능검험화소묘전경분석，학정해단렬위저응력취성，개렬여강판중함량교고적비금속협잡물、불합격적연신솔화충격공이급열알공온불이상조성적기판소성저유관。
Serious transverse crack occurred to Q 235B 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 .
