5結(jié)語
Q390D鋼板存在偏析、夾雜物以及裂紋是造成探傷不合的主要原因。通過控制鋼中夾雜物、有害元素、氣體含量、鑄坯低倍質(zhì)量以及合理的加熱制度等措施,濟鋼生產(chǎn)的Q390D鋼板的超聲檢測合格率由原來的98.25%提高到了99.54%,大大減少了因超聲檢測不合補產(chǎn)造成的成本損失,為Q390D超聲檢測鋼板的及時交付提供了保障。
參考文獻:
[1]趙慶宇.Q345D鋼板探傷不合的原因分析及改進措施[J].寬
厚板,2010,16(5):22-24.
[2]李雪東.S355K2鋼板超聲波探傷不合原因分析[J].山東冶
金,2014,36(3):20-22.
[3]鄭暉,林樹青.超聲檢測[M].2版.北京:中國勞動社會保障出
版社,2008.
AnalysisandImprovementofNonconformityCauseofQ390DSteelPlate
inUltrasonicInspection
LIUCaifeng,ZHANGMingguo
(JinanBranchCompanyofShandongIronandSteelCo.,Ltd.,Jinan250101,China)
Abstract:ThesamplesfromdefectpositionofQ390DsteelplatebyultrasonicinspectionwasstudiedbymeansofMetallurgicalMicroscopy,ScanningElectronMicroscope(SEM)andEnergyDispersiveSpectrometer(EDS).Theresultsshowedthatthedefectssuchassegregation,inclusionandmicro-crackwereexistedinthesampleandwerethemaincauseoftheechoesinultrasonicflawdetection.Throughoptimizingconvertertappingprocess,controllingharmfulelementsandgascontentinsteel,adoptingreasonableheatingsystemandothermeasures,thequalificationrateofultrasonicinspectionwasimprovedfrom98.25%to99.54%.Keywords:Q390Dsteelplate;ultrasonicinspection;segregation;inclusion;micro-crack
????????????????????????????????????????????????????????????????????????????????????????????????????
2007(增刊):337-340.(上接第33頁)要影響因素對生產(chǎn)線設(shè)備進行改造,經(jīng)測試,已取得一定效果并符合生產(chǎn)實際,從一定程度上改善卷形不齊問題。
參考文獻:
[1]曹平.冷軋帶鋼平整線控制系統(tǒng)設(shè)計與應(yīng)用[D].沈陽:東北
大學(xué),2007:1-6.
[2]王鴻春,陳龍夫.熱軋帶鋼卷取卷形的控制[J].冶金自動化,
[3]張戟.重卷機組對中裝置糾偏特點分析及改進措施[J].本鋼
技術(shù),2003(3):27-29.
[4]劉紅娜.重卷機組對中裝置糾偏效果分析[C]//中國金屬學(xué)
會.2003中國鋼鐵年會論文集,北京:2003:423.
[5]彭沖.重卷機組生產(chǎn)技術(shù)的優(yōu)化[J].軋鋼,2013(5):31-34.
StudyontheShapeDefectsofSteelCoilsonColdRollingRecoilingLine
XIAOZhiyu1,LILirong2,LIUBing1,LIUXiaoning1
(1WuhanVocationalCollegeofSoftwareandEngineering,Wuhan430205,China;2ZhongnanUniversityofEconomicsandLawWuhanCollege,Wuhan430079,China)
Abstract:Thestatisticsshowthat,theshapedefectsofsteelcoilsoncoldrollingrecoilingline,alloyplateandsheetforhomeelectricalappliancesaccountedforthehighestproportion,followedbythegeneralboardandFoxconnplate,theproportionofgalvanizedplateisthelowest.Theproportionofshapedefectsishigherafterthecutedge.Thesensitiveareaoftheshapedefects:widthis1201-1250mmandthicknessis0.7-0.8mm.Analysissuggeststhat,themainreasonoftheshapedefectsispoorproductionunitrectifyingeffect;diskshearingedgestripserpentinewaves;poorstabilityofrollsystem.Throughthestudyofthetransformationofproductionlineequipmenttheshapedefectsofsteelcoilscanbereduced.Keywords:coldrolling;recoilingline;shapedefectsofsteelcoil
36