简介：涟钢700MPa级高强钢研发过程中,曾出现脱磷、窄成分控制困难,全氧含量、夹杂物等级偏高,钢包不自开、中间包过热度不稳定,铸坯纵裂纹、铸坯低倍差和铸坯断坯等一系列问题。本文结合生产现场实际工况,通过分析、试验及优化工艺,实现700MPa级高强钢的稳定、批量生产,保证了产品的质量要求。

简介：对南钢生产的40mm厚800MPa级N800CF高强度水电钢进行了冷裂纹敏感性测试，并采用SMAW、GMAW和SAW三种方法对N800CF钢进行了焊接工艺评定。结果表明。南钢生产的N800CF水电钢预热80℃时可避免冷裂纹的产生，焊接接头综合性能良好。

简介：Threedifferenttypesoftensilestrength(TS)980MPagradeadvancedhigh-strengthsteelsusedinautomotiveapplications,namely,980MS(martensitesteel),980DP(dualphase)and980QP(quenchingandpartitioning)steelswereexamined.ThedelayedfractureresistanceofthesteelswasevaluatedusingaU-bendtest,slowstrainratetest(SSRT)andaconstantloadtensiletest.Theresultsindicatedthatallthesteelscouldpassthe300hHClsolutionimmersiontestandnoneoftheU-bendspecimenswasfracturedinthetest.However,thesteelsexhibiteddifferentsusceptibilitiestodelayedfractureunderSSRTandtheconstantloadtensiletests.980DPexhibitedthehighestresistancetodelayedfractureamongallthesamples,while980MSwasfoundtobethemostsusceptibletodelayedfracture.

简介：Coldrolledmartensiticsheetsteelsareachievingmoreandmoreapplicationsincar-makingbecauseoftheirultra-highstrengthandpotentialforweightreduction.Therelativelylowplasticityofultra-highstrengthmartensiticsteelsmightbeadrawbackfortheapplicationsintheaspectsofformingandsafetyprotectionfunctionandshouldbesignificantlynoted.A1500MPagradecoldrolledmartensiticsheetsteelhasbeenstudiedtoinvestigatethebendabilityat90degreebendingandimpacttoughnessaswellasfracturesurfacemorphologyatvarioustemperatures.Somediscussionshavebeenmadebasingupontheexperimentdatatogetsomeunderstandingontheperformanceofthematerialsundervariousconditionsandonhowtomakeuseofthiskindofultrahighstrengthsteelproperly.

简介：本发明公开了一种屈服强度960MPa级调质钢及其制造方法，控制好此调质钢的碳、硅、锰、磷、硫、铬、钼、铌、钒、钛、铝及硼的质量百分含量和碳当量。经预处理的高炉脱硫铁水人转炉冶炼，