双相不锈钢的焊接1． 双相不锈钢可焊性良好，热裂倾向小，一般焊前不需预热，焊后不需热处理，可与18-8型奥氏体不锈钢或碳钢等异种钢焊接，下面我们就来说一说关于焊材的选用基本原则?我们一起去了解并探讨一下这个问题吧!
焊材的选用基本原则
| 常用焊接材料选用明细 | ||
| 序号 | 母材材质 | 焊接材料 |
| 第一部分:压力管道用焊接材料 | ||
| 1、Ⅰ类材料 | ||
| 1 | 20 | J422 |
| 2 | 20 | H08Mn2Si |
| 3 | 20 | TIG-J50 |
| 4 | 20 | H08Mn2Si J422 |
| 5 | 20 | H08A |
| 6 | 20 | TIG-J50 J427 |
| 7 | A106Gr.B | H08Mn2SiA J427 |
| 8 | A234WPB A106Gr.B | H08Mn2Si J427 |
| 2、Ⅱ类材料 | ||
| 9 | 16Mn | H08Mn2Si J507 |
| 3、Ⅳ类材料 | ||
| 10 | A335 P22 | TIG-R40 R407 |
| 11 | 12Cr1MoV | H08CrMoVA |
| 12 | 12Cr1MoV | H08CrMoVA R317 |
| 13 | 12Cr2MoG | TIG-R40/R407 |
| 14 | 15CrMo | H05CrMoTiRe R307 |
| 15 | 15CrMo | H13CrMoA R307 |
| 16 | 15CrMo P11 | H13CrMoA R307 |
| 17 | P11 | H13CrMoA R307 |
| 18 | P22 | TIG-R40 |
| 19 | P22 | TIG-R40,R407 |
| 20 | P22 12Cr1MoV | H08CrMoVA/R317 |
| 4、Ⅴ类材料 | ||
| 21 | Cr5Mo | HCr5Mo R507 |
| 22 | Cr5Mo | TIG-R40 R507 |
| 23 | STFA-25 | HCr5Mo R507 |
| 24 | 1Cr5Mo | TIG-R40 R507 |
| 25 | P5（1Cr5Mo） | A302 |
| 5、Ⅵ类材料 | ||
| 26 | 09Mn2VDR | TGS-1N W707Ni |
| 6、Ⅶ类材料 | ||
| 27 | A312 TP304 | TGF-308L，A137 |
| 28 | A312 TP316L | TGF-316L A022 |
| 29 | 0Cr18Ni10Ti | H0Cr20Ni10Ti |
| 30 | 0Cr18Ni10Ti | H0Cr20Ni10Ti/A137 |
| 31 | 0Cr18Ni12Mo2Ti | TGF-316L A022 |
| 32 | 0Cr18Ni9 | E308L-T |
| 33 | 0Cr18Ni9 | TGF308L-T |
| 34 | 1Cr18Ni9Ti | A132 |
| 35 | 316L | H00Cr19Ni12Mo2/A022 |
| 36 | TP304 | H1Cr19Ni9Ti/A132 |
| 37 | TP316 | H0Cr19Ni12Mo2/A202 |
| 38 | TP321 | H0Cr20Ni10Ti/A137 |
| 39 | TP321 | TGF347 A137 |
| 40 | TP347 | H0Cr20Ni10Nb/A137 |
| 41 | TP347 | H0Cr20Ni10Nb/A137 |
| 7、Ⅷ类材料 | ||
| 42 | 0Cr13 | H0Cr20Ni10Ti、A132 |
| 8、复合钢管 | ||
| 43 | 304/20 | H1Cr24Ni13/A302 |
| 9、异类材料 | ||
| 44 | 09Mn2DR TP304 | H1Cr24Ni13/A307 |
| 45 | 1Cr5Mo 316L | H1Cr24Ni13 A302 |
| 46 | 1Cr5Mo T9 | H1Cr9Mo/R707 |
| 47 | 20 00Cr17Ni14Mo2 | H1Cr24Ni13，A302 |
| 48 | 20 1Cr5Mo | H08Mn2SiA J427 |
| 49 | 304L 316Ti | TGF316L A022 |
| 50 | A106 Gr.B 20MnMo | H08Mn2SiA J427 |
| 51 | A106Gr.B TP304 | H1Cr24Ni13/A407 |
| 52 | Cr5Mo 15CrMo | 13CrMoA/R307 |
| 53 | Cr5Mo 1Cr18Ni9Ti | H1Cr24Ni13/A302 |
| 54 | P11 | 13CrMoA/R307 |
| 55 | P11 20 | 13CrMoA/J427 |
| 56 | P11 TP304 | H1Cr24Ni13/A407 |
| 10、特殊材料及其与异种钢 | ||
| 57 | 0Cr25Ni20 | H0Cr25Ni20/A407 |
| 58 | 15Mo3 15CrMo | H08CrMoA、A107 |
| 59 | 15Mo3 20 | TIG-J50、J427 |
| 60 | 20Cr33NiNb | ERNiCr-3 |
| 61 | 20Cr33NiNb Incoloy 800H | ERNiCr-3 |
| 62 | 800HT TP347 | ENiCrCoMo-1 |
| 63 | 904L | 904L |
| 64 | A333-6 | TGS-1N，W707Ni |
| 65 | A335 P22 Incoloy 800H | ERNiCr-3 Ni337 |
| 66 | A671 CC70 | TGS-1N，W707Ni |
| 67 | B407 800H Inconloy 800H | ERNiCrCoMo-1 |
| 68 | B407 800HT TP304 | ERNiCr-3 |
| 69 | B407 800HT P11 | ERNiCrCoMo-1 |
| 70 | Incoloy 800H | ERNiCr-3 |
| 71 | Incoloy 800H P11 | ERNiCr-3 |
| 72 | P22 TP304H | H1Cr24Ni13、A307 |
| 73 | SA333-6 | H08Mn2MoVA W707Ni |
| 74 | T9 | H1Cr9Mo/R707 |
| 75 | TP1 | HSCCu201 |
| 76 | UNS N04400 | Alloy60,Alloy190 |
| 77 | ZG4Cr35Ni45Nb Inconloy 800H | ERNiCrMo-3 |
| 78 | ZG4Cr35Ni45Nb ZG4Cr25Ni35Nb | ERNiCr-3 |
| 11、卷制管 | ||
| 79 | L245 | ER50-6、J427 |
| 80 | L245 20 | ER50-6、J422 |
| 81 | X42 | H08Mn2Si J427 |
| 82 | X52 | TIG-J50 J506 |
| 83 | X60 | E6010 E8010 E8018 |
| 84 | X65 | TIG-J50 J557 |
| 第二部分:压力容器板材用焊接材料 | ||
| 1、Ⅰ类材料 | ||
| 1 | 15# | J422、H08A HJ431 |
| 2 | 20# 20g | TIG-J50/J427 |
| 3 | 20# 20g | J427 |
| 4 | 20g | J427 |
| 5 | 20g | TIG-J50/J427 |
| 6 | 20g | H08A HJ431 |
| 7 | 20g | TIG-J50/J427 |
| 8 | 20R | J427 |
| 9 | 20R | TIG-J50/J427 |
| 10 | 20R | H08A HJ431 |
| 11 | 20R | H10MnSi HJ431 |
| 12 | 20R | H08Mn2SiA |
| 13 | 25# Q235-B | J427 |
| 14 | Q235-A | J427 |
| 15 | Q235-A | E4315/H08A HJ431 |
| 16 | Q235-A | H08A HJ431 |
| 17 | Q235-A | TIG-J50/J427 |
| 18 | Q235-B | J427 |
| 19 | Q235-B | J422 |
| 20 | SA516 Gr.60 | LB52NS |
| 2、Ⅱ类材料 | ||
| 21 | 15MnV | J507 |
| 22 | 16Mn | H10MnSi HJ431 |
| 23 | 16Mng | TIG-J50/E5015 |
| 24 | 16MnR | J507 |
| 25 | 16MnR | J506 |
| 26 | 16MnR | TIG-J50 |
| 27 | 16MnR | J427/H10MnSi HJ431 |
| 28 | 16MnR | H08A HJ431 |
| 29 | 16MnR | H10MnSi HJ431 |
| 30 | 16MnR | H10Mn2 HJ431 |
| 31 | 16MnR | H08Mn2SiA |
| 32 | 16MnR | A062、A002 |
| 33 | 16MnR | EG-1 |
| 34 | 16MnR | TIG-J50,J507 |
| 35 | 16MnR 15MnNbR | J557 |
| 36 | 20MnMo | J507 |
| 37 | 20MnMo | TIG-J50/J507 |
| 38 | Q345E | E5015 |
| 39 | SPV36N | J507B |
| 3、Ⅲ类材料 | ||
| 40 | CF62 | E6015-G |
| 41 | 610U2 | LB-62UL |
| SPV490QSR | MG-60 | |
| 42 | SPV490QSR | LB-62 |
| 43 | SPV490Q | LB-62 |
| 44 | SPV490Q | DWS-60G |
| 45 | SPV490Q | DS-49/MF-33H |
| 4、Ⅳ类材料 | ||
| 46 | 13CrMo44 | R307 |
| 47 | 14Cr1MoR | R307B |
| 48 | 14Cr1Mo锻 | H11CrMo45A R307B |
| 49 | 14Cr1Mo锻 14Cr1MoR | H11CrMo45A R307B |
| 50 | 15CrMo | H13CrMoA HJ250G |
| 51 | 15CrMoR | R307 |
| 52 | 15CrMoR | H05CrMoTIRe/R307 |
| 53 | 15CrMoR | H13CrMoA HJ250G |
| 54 | 15CrMoR | A307 |
| 55 | 15CrMo锻 | E309MoLT1-1 |
| 56 | 15CrMo锻 | E309LT1-1，E316LT1-1 |
| 57 | 15CrMo锻 | ER309L |
| 58 | 15CrMo锻 | H05CrMoTiRe、R307 |
| 59 | 15CrMo锻 | R307 |
| 60 | 15CrMo锻 15CrMoR | R307 |
| 5、Ⅴ类材料 | ||
| 61 | 1Cr5Mo | R507 |
| 6、Ⅵ类材料 | ||
| 62 | 16MnDR | H05MnSiTiRe、J507RH |
| 63 | 16MnDR | J507RH |
| 64 | 07MnNiCrMoVDR 08MnNiCrMoVD | J607RH |
| 65 | 08MnNiCrMoVD | TGS-3N、J607RH |
| 66 | 08MnNiCrMoVD | J607RH |
| 7、Ⅶ类材料 | ||
| 67 | 316 | H00Cr19Ni12Mo2-HJ260 |
| 68 | 316 | A022 |
| 69 | 0Cr18Ni9 | A132 |
| 70 | 0Cr18Ni9 | H0Cr21Ni10 A102 |
| 71 | 0Cr18Ni9 | H0Cr20Ni10-HJ260 |
| 72 | 0Cr18Ni9 | A102 |
| 73 | 0Cr18Ni9Ti | H0Cr20Ni10Ti HJ260 |
| 74 | 1Cr18Ni9Ti | A137 |
| 75 | 1Cr18Ni9Ti | H0Cr20Ni10Ti/A132 |
| 76 | 1Cr18Ni9Ti | H0Cr20Ni10Ti/HJ260 |
| 77 | 1Cr18Ni9Ti | HJ260-H0Cr20Ni10Ti |
| 78 | 304L | H0Cr20Ni10Ti/A002 |
| 79 | 304L | A002 |
| 80 | 316L | A022 |
| 81 | 316L | H00Cr19Ni12Mo2/A022 |
| 82 | 316L | H0Cr20Ni14Mo3 HJ260 |
| 83 | AISI304 | H0Cr20Ni10Ti/A132 |
| 8、复合材料 | ||
| 84 | 0Cr13/15CrMoR | R307、Ni337 |
| 85 | 0Cr13/15CrMoR | WEL GTAW82、Ni337 |
| 86 | 0Cr13/20R | J427、H08A-HJ431、A302、A102 |
| 87 | 0Cr13Al/16MnR | J507、A062 |
| 88 | 0Cr13Al/20R | J427、A062 |
| 89 | 0Cr18Ni9/20R | J427、H08A-HJ431、A302、A102 |
| 90 | 2205/20R | J427、E22.9.3N |
| 91 | 304L/16MnR | J507/A302/A002 |
| 92 | 304L/20R | J427/A302/A002 |
| 93 | 316L/16MnR | J507、A022、A042、H10MnSiA HJ431 |
| 94 | 316L/16MnR | J507/A042/A022 |
| 95 | 316L/20R | H08A HJ431、A042、A022 |
| 96 | 316L/20R | J427、A022、A042 |
| 97 | 316L/20R | J427、A022、A042、H08A HJ431 |
| 98 | 405/16MnR | J507.A132.A302 |
| 99 | 405/20g | J427.A132.A302、H08A HJ431 |
| 100 | 405/20R | J427、A302、A132、H08A HJ431 |
| 101 | 405/20R | J427、A062 |
| 102 | 405/20R 2205/20R | J427、A062 |
| 103 | SA405/20R | J427、A062 |
| 104 | SA405/20R | J427、H08A-HJ431、A062 |
| 105 | SUS321/15CrMo | HJ250G H13CrMoA、A062、A132 |
| 106 | SUS321/15CrMo | HJ250G H13CrMoA、A062、A132 |
| 107 | SUS321/15CrMo | R307、A062、A132 |
| 9、异类材料 | ||
| 108 | 0Cr13/15CrMoR 15CrMoR | R307、Ni337 |
| 109 | 0Cr13/15CrMoR 1Cr5Mo | WEL TIG82、Ni337 |
| 110 | 0Cr13/20R 0Cr18Ni9 | H0Cr20Ni10Ti,A302,A102 |
| 111 | 0Cr13Al 0Cr18Ni9 | A062 |
| 112 | 0Cr18Ni9 20R | A062 |
| 113 | 15CrMo 0Cr18Ni9 | H1Cr24Ni13、A302 |
| 114 | 15CrMo 16MnR | A302 |
| 115 | 15CrMo 20g | J427 |
| 116 | 16Mn/316L 316L | A022、A042 |
| 117 | 16Mn/405 16Mn | E5015、A302 |
| 118 | 16MnDR 00Cr17Ni14Mo2 | H1Cr24Ni13、A302 |
| 119 | 16MnDR 0Cr18Ni9 | H1Cr24Ni13、A302 |
| 120 | 16MnDR 16MnR | H10Mn2 E5015-G |
| 121 | 16MnR 0Cr13 | H1Cr24Ni13、A302 |
| 122 | 16MnR 12Cr2Mo | TIG-J50 J507 |
| 123 | 16MnR 14Cr1MoR | J057 |
| 124 | 16MnR 1Cr18Ni9Ti | A307 |
| 125 | 16MnR SA350 LF2 | TIG-J50 J507 |
| 126 | 20g 15CrMo | A302 |
| 127 | 20g 1Cr18Ni9Ti | A307 |
| 128 | 20R/316L 316L | A042、A022 |
| 129 | 20R/405 0Cr13 | A132、A302 |
| 130 | 20R/405 20R | E4315、A302、H08A HJ431 |
| 131 | 20R/405 奥18-8 | A132、A302 |
| 132 | 20R 15CrMoR | H08A HJ431 |
| 133 | 20R 1Cr18Ni9Ti | H1Cr24Ni13/A307 |
| 134 | 20R 304L/20R | J427/A302 |
| 135 | 20R SA405/20R | J427、A062 |
| 136 | 304L/16MnR 316L/16MnR | J507/A042/A022 |
| 137 | 304L/20R 316L/20R | J427/A042/A022 |
| 138 | 316L 16MnR | A042 |
| 139 | 316L Q235-B | A042 |
| 140 | CF62 16MnR | E6015-G |
| 141 | Q235-A 15CrMoR | J427 |
| 142 | Q235B SPV490Q | LB62 |
| 143 | SA105 16MnR | J507 |
| 144 | SB409 20R | A507 |
| 10、特殊材料及其与异种钢 | ||
| 145 | 09CrCuSb | J427 |
| 146 | 09CrCuSb 0Cr18Ni9 | A302 |
| 147 | 09CrCuSb 16MnR | ND |
| 148 | 09CrCuSb Q235A | ND |
| 149 | 0Cr25Ni20 | A402 |
| 150 | 0Cr25Ni20 0Cr18Ni9 | A302 |
| 151 | 0Cr25Ni20 16MnR | A302 |
| 152 | 5A02 | S331 |
| 153 | SA516 Gr.70 | J507RH |
| 154 | SA516-70N | E601,E7018 |
| 155 | SA671 CC70 | ER80S-G,E7016-1 |
| 156 | TA2 | TA2 |
| 157 | UNS N08810 | Ni135 |
| 158 | UNS N08810 | Ni327 |
| 159 | UNS N08810 0Cr18Ni9 | Ni135 |
| 160 | UNS N08810 20R | Ni135 |
| 161 | UNS N08810 20R | Ni327 |
| 162 | UNS N08811 | Ni337 |
| 163 | UNS N08811（SB564 SB409） | Ni337 |
| 164 | UNS N08811 15CrMoR | Ni337 |
| 11、换热器用 | ||
| 165 | 08Cr2AlMo(φ25×2.5)与20R(δ=24) | H08Cr2AlMo |
| 166 | 09CrCuSb(φ38×3)与16MnR(δ=22) | H09CrCuSb |
| 167 | 0Cr18Ni9(φ19×2)与0Cr18Ni9(δ=20) | H0Cr24Ni10Ti |
| 168 | 15CrMo(φ19×2)与15CrMoR(δ=20) | H05CrMoTiRe |
| 169 | 15CrMoR 15CrMo | TIG-R30 |
| 170 | 16Mn(φ14×2)与16MnR(δ=20) | ER50-6 |
| 171 | 20(φ25×2.5)与16Mn(δ=24) | H08Mn2SiA |
| 172 | 20(φ38×3.5)与16Mn(δ=22) | ER50-6 |
| 173 | 20(φ38×4)与20g(δ=16) | J427 |
| 174 | 20(φ57×3.5)与16Mn(δ=20) | H08Mn2SiA |
| 12、球罐 | ||
| 175 | 07MnCrMoVDR | J607RH |
| 176 | 15MnNbR | J557 |
| 177 | 15MnNbR | J507RH |
| 178 | 16MnR | J507 |
| 179 | 16MnR | E712C |
| 180 | 16MnR | J507R |
| 181 | 16MnR | TIG-J50,J507R |
| 182 | 16MnR | E71T-1 |
| 183 | 20g | J427 |
| 184 | 20MnMo | J557RH |
| 185 | 20MnMo 15MnNbR | J557RH |
| 186 | 610U2 | LB62-UL |
| 187 | A537CL1 | E7018-G |
| 188 | CF-62 | J607RH |
| 第三部分:压力容器用焊接材料（管材） | ||
| 1、Ⅰ类材料 | ||
| 1 | 20 | J422 |
| 2 | 20 | H08Mn2Si |
| 3 | 20 | TIG-J50 |
| 4 | 20 | H08Mn2Si J422 |
| 5 | 20 | H08A |
| 6 | 20 | TIG-J50 J427 |
| 7 | A106Gr.B | H08Mn2SiA J427 |
| 8 | A234WPB A106Gr.B | H08Mn2Si J427 |
| 2、Ⅱ类材料 | ||
| 9 | 16Mn | H08Mn2Si J507 |
| 3、Ⅳ类材料 | ||
| 10 | A335 P22 | TIG-R40 R407 |
| 11 | 12Cr1MoV | H08CrMoVA R317 |
| 12 | 12Cr1MoV | H08CrMoVA |
| 13 | 12Cr2MoG | TIG-R40/R407 |
| 14 | 15CrMo | H05CrMoTiRe＋R307 |
| 15 | 15CrMo | H13CrMoA R307 |
| 16 | P22 | TIG-R40 |
| 17 | P22 | TIG-R40,R407 |
| 4、Ⅴ类材料 | ||
| 18 | Cr5Mo | HCr5Mo R507 |
| 19 | Cr5Mo | TIG-R40 R507 |
| 20 | STFA-25 | HCr5Mo R507 |
| 21 | 1Cr5Mo | TIG-R40 R507 |
| 22 | P5（1Cr5Mo） | A302 |
| 5、Ⅵ类材料 | ||
| 23 | 09Mn2VDR | TGS-1N W707Ni |
| 6、Ⅶ类材料 | ||
| 24 | A312 TP304 | TGF-308L，A137 |
| 25 | A312 TP316L | TGF-316L A022 |
| 26 | 0Cr18Ni10Ti | H0Cr20Ni10Ti |
| 27 | 0Cr18Ni10Ti | H0Cr20Ni10Ti/A137 |
| 28 | 0Cr18Ni12Mo2Ti | TGF-316L A022 |
| 29 | 0Cr18Ni9 | E308L-T |
| 30 | 0Cr18Ni9 | TGF308L-T |
| 31 | 1Cr18Ni9Ti | A132 |
| 32 | 316L | H00Cr19Ni12Mo2/A022 |
| 33 | TP304 | H1Cr19Ni9Ti/A132 |
| 34 | TP316 | H0Cr19Ni12Mo2/A202 |
| 35 | TP321 | H0Cr20Ni10Ti/A137 |
| 36 | TP321 | TGF347 A137 |
| 37 | TP347 | H0Cr20Ni10Nb/A137 |
| 38 | TP347 | H0Cr20Ni10Nb/A137 |
| 7、Ⅷ类材料 | ||
| 39 | 0Cr13 | H0Cr20Ni10Ti、A132 |
| 8、复合钢管 | ||
| 40 | 304/20 | H1Cr24Ni13/A302 |
| 9、异类材料 | ||
| 41 | 09Mn2DR TP304 | H1Cr24Ni13/A307 |
| 42 | 1Cr5Mo 316L | H1Cr24Ni13 A302 |
| 43 | 1Cr5Mo T9 | H1Cr9Mo/R707 |
| 44 | 20 1Cr5Mo | H08Mn2SiA J427 |
| 45 | 304L 316Ti | TGF316L A022 |
| 46 | A106 Gr.B 20MnMo | H08Mn2SiA J427 |
| 47 | Cr5Mo 15CrMo | 13CrMoA/R307 |
| 48 | Cr5Mo 1Cr18Ni9Ti | H1Cr24Ni13/A302 |
| 10、特殊材料及其与异种钢 | ||
| 49 | 0Cr25Ni20 | H0Cr25Ni20/A407 |
| 50 | 20Cr33NiNb | ERNiCr-3 |
| 51 | 20Cr33NiNb Incoloy 800H | ERNiCr-3 |
| 52 | 904L | 904L |
| 53 | A333-6 | TGS-1N，W707Ni |
| 54 | A671 CC70 | TGS-1N，W707Ni |
| 55 | SA333-6 | H08Mn2MoVA W707Ni |
| 56 | T9 | H1Cr9Mo/R707 |
| 57 | A335 P22 Incoloy 800H | ERNiCr-3 Ni337 |
| 58 | P22 12Cr1MoV | H08CrMoVA/R317 |
| 11、卷制管 | ||
| 59 | L245 | ER50-6、J427 |
| 60 | L245 20 | ER50-6、J427 |
| 61 | L245 20 | ER50-6、J422 |
| 62 | X65 | TIG-J50 J557 |
| 第四部分:锅炉焊接 | ||
| 1、Ⅰ类材料 | ||
| 1 | 20#管（φ57×3.5）钨极氩弧焊 | H08Mn2Si |
| 2 | 20#管（φ108×4.5）钨极氩弧焊/焊条电弧焊 | H08Mn2Si J422 |
| 3 | 20#管（φ273×18）钨极氩弧焊/焊条电弧焊 | H08Mn2Si J422 |
| 4 | Q235B板（δ=12）焊条电弧焊 | J427 |
| 5 | Q235A板（δ=18）焊条电弧焊 | J427 |
| 2、Ⅱ类材料 | ||
| 6 | 16MnR板（δ=12）焊条电弧焊 | J507 |
| 7 | 16MnR板（δ=14）埋弧焊 | HJ431/H10MnSi |
| 8 | 16Mn管（φ60×9）与16MnR板（δ=12）焊条电弧焊 | J507 |
| 9 | 16MnR管（φ90×16）与16MnR板（δ=24）焊条电弧焊 | J507 |
| 3、Ⅲ类材料 | ||
| 10 | 15CrMo板（δ=14）焊条电弧焊 | R307 |
| 11 | 12Cr1MoV管(φ42×4)钨极氩弧焊 | H08CrMoVA |
| 12 | 12Cr1MoV管(φ42×4)钨极氩弧焊/焊条电弧焊 | H08CrMoVA/R317 |
| 13 | 12Cr1MoV管(φ133×12)钨极氩弧焊/焊条电弧焊 | H08CrMoVA/R317 |
| 4、电力标准 | ||
| 14 | 20G 15CrMoG | TIG-J50/J427 |
| 15 | 12Cr2MoVWTIB | TIG-R34/R317 |
双相不锈钢的焊接
1． 双相不锈钢可焊性良好，热裂倾向小，一般焊前不需预热，焊后不需热处理，可与18-8型奥氏体不锈钢或碳钢等异种钢焊接。
2． 双相不锈钢的焊接材料或填充材料通常采用比母材含镍高的材料，对于含氮的双相不锈钢要求焊材和母材的含氮量相同。以保证焊缝金属有足够的奥氏体量。
3． 双相不锈钢常用的焊接方法有手工电弧焊和钨极氩弧焊两种。适宜使用多层焊，采用多道次和低熔敷率的方式。
4． 双相不锈钢的中温敏化问题在焊接时一般不会出现。
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