山东冶金
山東冶金
산동야금
SHANDONG METALLURY
2015年
3期
34-36
,共3页
Q390D钢板%超声波检测%偏析%夹杂物%裂纹
Q390D鋼闆%超聲波檢測%偏析%夾雜物%裂紋
Q390D강판%초성파검측%편석%협잡물%렬문
Q390D steel plate%ultrasonic inspection%segregation%inclusion%micro-crack
利用金相显微镜、扫描电镜和能谱分析对Q390D钢板超声波检测不合部位取样进行检测分析,结果表明,试样内部存在偏析、夹杂物以及裂纹等缺陷,是钢板产生缺陷回波的主要原因.通过优化转炉出钢工艺,控制钢中有害元素及气体含量,采用合理的加热制度等措施,Q390D钢板的超声检测合格率由98.25%提高到99.54%.
利用金相顯微鏡、掃描電鏡和能譜分析對Q390D鋼闆超聲波檢測不閤部位取樣進行檢測分析,結果錶明,試樣內部存在偏析、夾雜物以及裂紋等缺陷,是鋼闆產生缺陷迴波的主要原因.通過優化轉爐齣鋼工藝,控製鋼中有害元素及氣體含量,採用閤理的加熱製度等措施,Q390D鋼闆的超聲檢測閤格率由98.25%提高到99.54%.
이용금상현미경、소묘전경화능보분석대Q390D강판초성파검측불합부위취양진행검측분석,결과표명,시양내부존재편석、협잡물이급렬문등결함,시강판산생결함회파적주요원인.통과우화전로출강공예,공제강중유해원소급기체함량,채용합리적가열제도등조시,Q390D강판적초성검측합격솔유98.25%제고도99.54%.
The samples from defect position of Q390D steel plate by ultrasonic inspection was studied by means of Metallurgical Microscopy, Scanning Electron Microscope (SEM) and Energy Dispersive Spectrometer (EDS). The results showed that the defects such as segregation, inclusion and micro-crack were existed in the sample and were the main cause of the echoes in ultrasonic flaw detection. Through optimizing converter tapping process, controlling harmful elements and gas content in steel, adopting reasonable heating system and other measures, the qualification rate of ultrasonic inspection was improved from 98.25% to 99.54%.
