钢材预热、热处理恒温温度.doc

各种钢材焊前预热温度钢的合金系(举例钢号)管 材板 材壁厚(mm)预热温度()厚度(mm)预热温度()碳含量0.35%的碳素钢及其铸件2610020034100150C-Mn(Q345)151502003028Mn-V(Q390)1Mn-Mo-V(14MnMoV、18MnMoNbg)151502001Cr- M。(15CrM。、ZG20CrM。)Cr-Mo(12CrMo)lO150250钢的合金系(举例钢号)管 材板 材壁厚(mm)预热温度()厚度(mm)预热温度()1Cr- MoV(12Cr1MoV、ZG20CrM。)6200300-1Cr-1Mo-V(15Cr1Mo1V、ZGl5Cr1Mo1V)2Cr-Mo-W-V(12Cr2MoWVTiB)1Cr-Mo-V、2Cr-1Mo(12Cr2Mo)3Cr-1Mo-V-Ti(12Cr3MoVSiTiB)62503509Cr-1Mo-V-Nb-2003002003009Cr-1Mo、12Cr-1Mo-V-300400200300 注1：当采用钨极氩弧焊打底时，可按下限温度降低50； 注2：当管子外径大小219mm或壁厚不小于20mm时，应采用电加热法预热。耐热钢的焊后热处理的恒温温度及恒温时间钢 种温度()焊件厚度a(mm)12.512.5252537.537.5505075756100100125恒温时间(h)碳含量0.35%(20、ZG25)C-Mn(Q345)6006501.522.252.52.750.5Cr-0.5Mo(12CrMo)6507000.511.522.252.52.751Cr-0.5Mo(15CrMo、ZG20CrM0)6707000.511.522.252.52.751Cr-0.5Mo-V(12CrlMoV、ZG20CrMoV)1.5Cr-1Mo-V(ZGl5CrlMolV)1.75Cr-0.5Mo-V720750O511.523452.25Cr-1Mo7207500.511.523452Cr-0.5Mo-VW(12Cr2MoWVTiB)3Cr-1Mo-VTi(12Cr3MoVSiTiB)750780O751.251.752.253.254.255.259Cr -1Mo-V-Nb1234569Cr-1Mo、12Cr-1Mo12.53.5567a 对于不同壁厚部件焊接时的焊接接头的壁厚计算取值，见DL/T 8192002附录C。各类异种钢焊接推荐的焊接材料和焊后处理温度表 1/2Cr-1/2Mo 3-c-C 1Cr-1/2Mo 3-c-C 4-c-C 1Cr-1/2Mo 3-c-C 4-c-C 4-c-C 1/2Cr-1/2Mo-V 4-c-D 4-DC 4-c-C 5-d-E 1Cr-1/2Mo-V 4-c-D 4-c-C 4-c-C 5-d-E 5-d-E LCr-1Mo-V 4-c-D 4-c-D 4-c-D 5-d-E 5-d-E 5-d-E 1Cr-1/2Mo-V 4-c-D 4-c-D 4-c-D 5-d-E 5-d-E 5-d-E 5-d-E 2Cr-1/2Mo 4-c-D 4-c-D 4-c-D 5-d-E 5-d-E 5-d-E 5-d-E 6-d-E 2Cr-lMo 4-c-D 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 6-e-E 2Cr-1/2Mo-V 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 6-e-E 3Cr-1Mo 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 6-e-E 3Cr-1Mo-V-Ti 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 5-d-E 6-e-E 5Cr-1/2Mo 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E V 7Cr-1/2Mo 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 9Cr-Mo 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 12Cr-1Mo-V 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 6-e-E 18-8 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 钢种1/2Cr-1/2Mo 1Cr-1/2Mo 1Cr-1/2 Mo /2Cr-1/2Mo-V 1Cr-1/2 Mo-V1Cr-1Mo-V 1Cr-1/2 Mo-V Cr-1/2Mo 按SD340-1989分类 1/2Cr-1/2Mo 1Cr-1/2Mo 1Cr-1/2Mo 1/2Cr-1/2Mo-V 1Cr-1/2Mo-V LCr-1Mo-V 1Cr-1/2Mo-V 2Cr-1/2Mo 2Cr-lMo 6-e-E 2Cr-1/2Mo-V 6-e-E 6-f-F 3Cr-1Mo 6-e-E 6-f-F 6-f-F 3Cr-1Mo-V-Ti 6-e-E 6-f-F 6-f-F 6”-f-F 5Cr-1/2Mo 6-e-E 6”-f-F 6”-f-F 6-f-F 7-F V 7Cr-1/2Mo 6-e-E 6”-f-F 6”-f-F 7-F 7-F 7-F 9Cr-Mo 6-e-E 6”-f-F 6”-f -F 7-F 7-F 7-F 8-F 12Cr-1Mo-V 6-e-E 6”-f-F 6-f-F 7-F 7-F 7-F 8-A 8-g-F 18-8 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 9-h-A 10-i-A 钢种2Cr-1Mo2Cr-1/2 Mo-W Cr-1Mo 3Cr-1Mo-VTi 5Cr-1/2Mo 7Cr-1/2Mo 9Cr-1Mo 12Cr- 1Mo-V18.8 按SD340-1989分类 V 注 1当两侧钢材之一为奥氏体不锈钢，且工作温度低于425时，可选用与所焊奥氏体不锈钢相应的焊条(焊丝)。 2对工作温度大于425的耐热合金钢管子、管件承压部件进行补焊或在其上焊接管接头时，若限于条件，焊后无法进行热处理时，推荐选用镍基焊条。 3当采用氩弧焊打底时，氩弧焊丝d可同3、4电焊条，d可同5、5电焊条，e可同6、6电焊条相匹配。 4括号内的酸性焊条为TIG盖面焊条。 5代号说明： 焊条 焊丝 氩弧焊丝 热处理温度() 3-热207(新热202) c-H13crM0 d-TIGR30 A-一般不进行热处理 4-热307(新热302) d-H08CrMoV d-TIGR31 B-620670 5-热317(新热312) e-H08Cr2Mo1 e-TIGR40 C-650700 5-热337 f-H08Cr2MoVNb D一670720 6-热407