QBQB408-2023冷成形用冷轧低碳钢板及钢带

Q/BQBQ/BQB408—Lowcarboncold-rolledsteelsheetandstripforcold 发布Q/BQB GB/T1.1—2020JISG3141:2021，EN10130:2006，JFSA2001:2014Q/BQB408—2021Q/BQB408—20214；7.3；7.4；本文件主要起草人：袁敏。Q/BQB408—1988，Q/BQB408—1994，Q/BQB408—1999，Q/BQB408—2003，Q/BQB408—2009，Q/BQB408—2014,Q/BQB408—2018，Q/BQB408—2019,Q/BQB408—2021。Q/BQBQ/BQBQ/BQBQ/BQB0.17mm～3.5mmGB/T228.1-202111金属材料1rnGB/TQ/BQBQ/BQB DC01/SPCC/SPCC-XS/SPCC-XM/SPCC-XL/DC03/SPCD/DC04/SPCE/DC05/SPCF/DC06/SPCG/SPCCQ/BQB401SPCCQ/BQB401260MPa化学成分a(熔炼分析 %(质量分数SPCC/SPCC-XSa %(质量分数DC01DC03DC04≤0.20≤0.20≤0.20aNbTibNbTiNbTi0.20化学成分(熔炼分析 %(质量分数BLCBLD≤0.20≤0.20≤0.20a允许添加NbTib允许用NbTiNbTi0.20%68910891011r公称厚度公称厚度aRR 40MPa。cGB/T228.1P17d厚度＜0.5mm1.6mm，rer＝(r+2r+r4 45SPCC-XMSPCC-XLaRR bGB/T228.1P17c对SPCC-XMSPCC-XL2.3mm160MPaQ/BQBQ/BQBQ/BQBQ/BQBrb,cnb,c屈服强度a无明显屈服时采用 bGB/T228.1P6crn0.50mm2.0～2.3mmr0.2 ＞2.3～2.5mmr900.4,当产品厚度＞2.5mm，r90rb,cnb,c屈服强度a当屈服现象不明显时采用 RP0.2，否则采用bGB/T228.1P17 SPCC/SPCC-XS/SPCC-XM/SPCC-DC01/3DC03/DC04/SPCD/SPCE/6DC05/DC06/DC07SPCF/SPCGBUSD/BUFD/产品两面中较好的一面无肉眼可见的明显缺欠，另一面至少应达到FB的缺欠，另一面至少应达到FB3%。如用户有特殊要求，可在订货时商议确定。14平均粗糙度注30.00083×c（mm/s（c0.05c（mm/min；10%Ag。Q/BQBQ/BQBQ/BQBQ/BQBGB/TGB/TGB/T228.1-2021rGB/T5027应变硬化指数(nGB/T5028GB/TGB/TGB/TGB/T对于拉伸试验、应变硬化指数(nrQ/BQB400GB/T8170A.1硬度(HVA.2度(HR30THR15T)或维氏硬度(HVAA.3A.4A.5HRB。A.2HRBSHRBWaHRBHRBSHRBWHRBWA.3HR30TS换算为换算为换算为换算为A.4HR15TS换算为aHR15TS93.0HRBS99.7HRBSA.5HVH