提高酒鋼q345b板材屈服強(qiáng)度研究

1、西安建筑科技大學(xué)碩士學(xué)位論文提高酒鋼Q345B板材屈服強(qiáng)度研究姓名：張懷仁申請學(xué)位級別：碩士專業(yè)：冶金工程指導(dǎo)教師：趙西成高興祿20030301西安建筑科技大學(xué)碩士論文StudyonIncreasing3fieldStrengthofQ345BPlateinJISCOSpeciality：MetallurgyEngineeringName：ZhangHuairenInstructor：ZhaoXichengGaoXingluABSTRA

2、CTThispapersummarizesthenewresearchstatusoflowalloyhighstrengthsteel，anddiscussesthemethodandthemeehardsmthatcanenhancetheyieldstrengthoflowalloyhighstrengthsteelThemostlyproblemsonthelowalloyhighstrengthsteel’Sresearcha

3、ndproductionhavebeenindicatedByanalyzingagreatdealofdatafromthecurrentproductionofQ345BplateinJ1SCO，thereasoncausedloweryieldstrengthinQ345Bplateisconfirmed，whichisthechemistrycompositionandrollingprocessofthesteelBasedO

4、nthis，thispaperresearchestheinfluencesofchemistrycompositionandrollingprocessORtheyieldstrengthofthesteelThemainresultsareasfollowTheyieldstrengthofQ345BplateCanincreaseaveragely20MPa——30MPabyincreasinglowerlimitofcarbon

5、contentandaddTitTheyieldstrengthofQ345Bplatecanincreaseaveragely60MPa一65MPawhenMncontentincreasefrom136％to155％，andadd，00029％0014％AI，O0012％一0035％Vand0001％0026％NbInthesamecondifionofsmeltingprocessandchemistrycomposition，t

6、hefinalrollingtemperaturethefin礎(chǔ)coolingtemperatureandthesoakingtemperaturearereducedaveragely35“C，25“(2and40Crespectivelytheaverageyieldstrengthof16mmthicknessplateand25ramthicknessplatecanincrease38gMPaand437MParespecti