平面弹簧扁钢技术条件内容.doc

平面弹簧扁钢技术条件 NG/NK019-2008本标准适用于热轧平面弹簧扁钢。1、尺寸、外形及允许偏差1.1 弹簧扁钢的截面形状应符合图1的规定。B扁钢的宽度H扁钢的厚度R扁钢侧面圆弧（R只在孔型上控制，不作为验收条件。R1/2H）图1 平面弹簧扁钢1.2 弹簧扁钢的尺寸及允许偏差应符合表1的规定。表1 弹簧扁钢的尺寸及允许偏差 mm截面尺寸（mm）允许偏差截面尺寸（mm）允许偏差截面尺寸（mm）允许偏差宽度50宽度5060宽度6070厚度680.15670.15670.188120.18790.187120.2012200.209200.2012200.2520300.2020300.2520300.303030300.30宽度500.5550600.6060700.75截面尺寸（mm）允许偏差截面尺寸（mm）允许偏差截面尺寸（mm）允许偏差截面尺寸（mm）允许偏差宽度7080宽度8090宽度90100宽度100厚度8100.207120.207120.207120.2010120.2512200.2512200.2512200.2512200.3020300.3020300.3020300.3020300.35300.35300.35300.35300.40宽度70800.8080900.80901000.801001.01.3 弹簧扁钢的平面厚度差，在宽度的两端测量时，应不大于厚度公差的25%（但最小值为0.1mm），宽面中部不得凸起。1.4 弹簧扁钢每米长度的侧向弯曲度（镰刀弯）不大于3mm，总侧弯度不大于扁钢总长度的0.30%mm。平弯：扁钢厚度7，不大于5.0mm/m，扁钢厚度7不大于4.0mm/m。1.5 普通长度47m，定尺、倍尺长度应在合同中注明，其允许偏差为040mm。2、技术要求2.1 弹簧扁钢的化学成份（熔炼成份）应符合表2规定表2.1 国内弹簧扁钢化学成份（GB/T1222-2007） %标准牌号适用厚度化学成份 %CSiMnCrVBNiCuPS不大于国标60Si2Mn0.560.641.502.000.701.000.350.350.250.0350.035内控60Si2Mn120.570.601.551.650.710.800.120.180.300.200.0250.02560Si2Mnb120.570.601.601.700.770.850.170.230.300.200.0250.025国标55SiMnVB0.520.600.701.001.001.300.350.080.160.00050.00350.350.250.0350.035内控55SiMnVB180.520.560.700.851.001.100.300.080.130.00100.00250.300.200.0250.02555SiMnVBb180.530.570.800.951.101.200.300.100.150.00150.00300.300.200.0250.025国标55CrMnA0.520.600.170.370.650.950.650.950.350.250.0250.025内控55CrMnA160.520.560.170.370.700.800.700.800.300.200.0200.02055CrMnAb160.530.570.170.370.750.850.750.850.300.200.0200.020国标60CrMnA0.560.640.170.370.701.000.701.000.350.250.0250.025内控60CrMnA180.560.600.170.370.750.850.750.850.300.200.0200.02060CrMnAb180.570.610.170.370.800.900.800.900.300.200.0200.020国标50CrVA0.460.540.170.370.500.800.801.100.100.200.350.250.0250.025内控50CrVA180.460.500.170.350.600.700.850.950.100.160.300.200.0200.02050CrVAb180.470.510.170.350.650.750.951.050.130.180.300.200.0200.020国标60CrMnBA0.560.640.170.370.701.000.701.000.00050.00400.350.250.0250.025内控60CrMnBA0.560.600.170.370.700.900.700.900.00100.00300.300.200.0200.020国标28MnSiB0.240.320.601.001.201.600.250.00050.00350.350.250.0350.035内控28MnSiB100.260.300.700.851.301.400.250.00150.00300.300.200.0250.02528MnSiBb100.280.320.800.951.351.450.250.00200.00350.300.200.0250.025协议标准52CrMnBA0.480.530.170.370.701.000.801.10Ti0.010.00080.00250.350.250.0300.030内控52CrMnBA0.480.520.170.370.750.900.851.000.00080.00150.300.200.0200.020表2.2 日标弹簧扁钢化学成份（JIS G4801-2005） %标准牌号适用厚度CSiMnCrVNiCuPS不大于日标SUP60.560.641.501.800.701.000.300.300.0300.030内控SUP60.560.601.501.650.700.800.120.180.300.200.0200.020日标SUP90.520.600.150.350.650.950.650.950.300.300.0300.030内控SUP9160.520.560.170.350.700.800.700.800.300.200.0200.020SUP9b160.530.570.170.350.750.850.750.850.300.200.0200.020日标SUP9A0.560.640.150.350.701.000.701.000.300.300.0300.030内控SUP9A180.560.600.170.350.750.850.750.850.300.200.0200.020SUP9Ab180.570.610.170.350.800.900.800.900.300.200.0200.020日标SUP100.470.550.150.350.650.950.801.100.150.250.300.300.0300.030内控SUP10180.470.510.170.350.750.900.851.050.150.200.300.200.0200.020SUP10b180.480.520.170.350.800.950.951.100.150.200.300.200.0200.020表2.3 德标弹簧扁钢化学成份（EN 10089:2002 DIN） %标准牌号适用厚度CSiMnCrVNiCuPS不大于德标51CrV40.470.550.400.701.100.901.200.100.25/Cu+10Sn0.600.0250.025内控51CrV4180.470.510.170.350.750.850.951.050.120.180.300.200.0200.02051CrV4b180.480.520.170.350.850.951.001.100.140.200.300.200.0200.020德标55Cr30.520.590.400.701.000.701.00/Cu+10Sn0.600.0250.025内控55Cr30.520.560.170.350.750.850.750.850.300.200.0200.020德标61SiCr70.570.651.602.000.701.000.200.45/Cu+10Sn0.600.0250.025内控61SiCr70.570.611.601.750.700.800.250.350.300.200.0200.020表2.4 美标弹簧扁钢化学成份（ASTM A322-91、ASTM A304-05） %标准ASTM牌号SAE牌号适用厚度CSiMnCrAl+NbNiCuPS不大于美标5160HSAE5160H0.550.650.150.350.651.100.601.000.250.350.0250.025协议5160HSAE5160H0.550.650.150.350.651.100.601.000.300.200.0250.025内控5160HSAE5160H15.50.550.590.200.350.750.850.800.900.300.200.0200.0205160HbSAE5160Hb15.50.560.600.200.350.800.900.850.950.300.200.0200.020美标5160SAE51600.560.640.150.350.751.000.700.900.250.350.0350.040麦钢协议5160SAE51600.560.640.150.350.751.000.700.900.0150.0450.300.250.0300.030内控5160SAE51600.570.610.170.350.800.900.800.900.0250.0400.300.200.0200.020备注：1. 将部分钢种按规格分为两档标记，带b的钢号为公司内部标记钢种使用，在标识牌及质保书上不应该存在。2. 通常情况下各钢种化学成份按内控要求考核，有协议标准时按协议标准判定、交货，没有协议标准按相应的国家标准要求判定、交货。若另有特殊要求时，由销售部门提前通知相关部门。3. 弹簧钢酸溶铝0.010%，其中60Si2Mn系列钢中酸溶铝0.020%、 N含量不大于80ppm。4. 出口产品钢中As含量不得大于0.07%。5. SAE5160弹簧钢内控要求Al+Nb为0.0250.040，其中Al要求为0.0100.020%，Nb要求为0.0150.020%；美标中对Ni要求为0.25%，经与用户协商后按0.3%交货，今后若用户有更严格要求，销售部门需通知相关部门下发相应的质量计划。2.2 连铸坯连铸坯相关事宜按连铸坯技术条件（NG/NK/020-2007）执行。2.3 力学性能2.3.1 用热处理毛坯制成试样，测定钢材的纵向力学性能，起结果应符合表3的规定。表3 弹簧扁钢的性能要求牌号热处理制度力学性能热轧硬度淬火温度()淬火剂回火温度()s (Mpa)b (Mpa) (%) (%)60Si2Mn850890油4305301180127552532155SiMnVB840880油4304901250140053032155CrMnA830860油4605101080 (0.2)122592032160CrMnA830860油4605201080 (0.2)122592032150CrVA830870油48052011501300104032160CrMnBA830860油4605201080 (0.2)122592032128MnSiB860900油或水3303901180133062530252CrMnBA830870油48052011501300930321SUP6830860油4805301080 (0.2)1230920302SUP9830860油4605101080 (0.2)1230920302SUP9A830860油4605201080 (0.2)1230920302SUP10840870油4705401080 (0.2)1230103032151CrV4840860油44046012001350165063032155Cr3830850油39041012501400170032030261SiCr7850870油4404601400155018505.520321SAE5160H830860油4605201080 (0.2)1225920321SAE5160830860油4605201080 (0.2)12259203212.3.2 对55SiMnVB需进行淬透性试验。试验结果：55SiMnVB钢在距末端9mm处洛氏硬度不小于HRC52。2.4 低倍在扁钢横向酸浸低倍试片上检查低倍组织时，不得有目视可见的缩孔、裂缝、分层、白点、气泡、翻皮及夹杂、一般疏松、中心疏松及偏析均不得超过2.5级。2.5 非金属夹杂物根据需方要求并在合同中注明，可检验钢的非金属夹杂物，其合格级别应符合表4的规定。表4 非金属夹杂物合格级别夹杂物类型A类B类C类D类细系粗系细系粗系细系粗系细系粗系合格级别2.52.02.02.02.01.52.01.52.6 脱碳层钢材的总脱碳层（全脱碳部分脱碳）深度，每边不得大于表5的规定（扁钢脱碳层在宽面检查）。表5 弹簧扁钢的脱碳要求牌号厚度总脱碳层深度不大于厚度的%硅弹簧钢82.68302.1其他弹簧钢82.181.62.7 表面质量2.7.1 弹簧扁钢的端头应剪切平直，不得漏剪、叠剪和崩山，不得有明显毛刺。2.7.2 热轧钢表面不得有裂纹、折叠、结疤、夹杂、分层、压入的氧化铁皮。钢材的局部缺陷必须清除，清除时不得采取铲凿的方法，清除后不得使钢材小于允许的最小尺寸，清除的宽度不小于清除深度的5倍。允许有从实际尺寸算起不超过公称尺寸负公差之半的个别细小划痕、压痕存在。2.8根据需方要求，可供应下列有特殊要求的钢材，具体项目由双方协议。2.8.1 对残余元素含量加以限制；2.8.2 规定淬透性要求（除55SiMnVB以外的钢）；2.8.3 检验钢材显微组织；2.8.4 检查钢材晶粒度，检查结果应在68级范围内。2.7.5 检验