CN1285444C - Solder wire material of submerged-arc welding for high grade pipeline steel - Google Patents
Solder wire material of submerged-arc welding for high grade pipeline steel Download PDFInfo
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- CN1285444C CN1285444C CN 200410073353 CN200410073353A CN1285444C CN 1285444 C CN1285444 C CN 1285444C CN 200410073353 CN200410073353 CN 200410073353 CN 200410073353 A CN200410073353 A CN 200410073353A CN 1285444 C CN1285444 C CN 1285444C
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Abstract
The present invention relates to welding wire material of submerged-arc weld for high grade pipeline steel. According to the weight percentage, the material is composed of components as following: 0.030% to 0.080% of C, 0.010% to 0.200% of Si, 1.500% to 2.000% of Mn, 1.000% to 1.500% of Ni, 0.200% to 0.300% of Mo, 0.200% to 0.300% of Cu, 0.020% to 0.040% of Ti, 0.100% to 0.250% of Ce and balancing Fe. The sum of the weight of the components is 100%. When the welding wire material of the present invention, which is made by an electric furnace smelting method, is matched with an alkalinity sintered flux, the present invention has the performance of high strength of a welding seam, good H2 S stress corrosion resistance, good low temperature toughness, etc. The strength and the toughness of the welding seam can be completely matched with those of base material of the high grade pipeline steel. The present invention is suitable for weld for pipeline steel with the strength grade in the condition that sigma<s> is no less than 550MPa and other structural steel.
Description
Technical field
The present invention relates to a kind of solder wire material, particularly a kind of solder wire material of submerged-arc welding of used for high grade pipe line steel.
Background technology
Oil, natural-gas transfer pipeline are usually located at the more abominable area of environment, as extremely cold district, earthquake zone or area, ocean, high strength and low-temperature flexibility to conveyance conduit require to increase day by day, this has just impelled succeeding in developing of high grade pipe line steel (X80 pipe line steel), and the X80 pipe line steel is described as 21 century natural-gas transfer pipeline steel by industrially developed country.High grade pipe line steel requires high strength, good low-temperature toughness and corrosion resistance, the high quality welding material that matches also becomes one of focus of concern, be the stress corrosion resistant of raising long-distance transport pipes, especially gas transmission line and the ability of anti-hydrogen induced cracking, the basic demand of antagonism corroded pipeline steel welded joint has: 1) hardness is less than HRC22 or Hv248; 2) contain the S amount less than 0.002%; 3) tissue of welding point; 4) reduce C, P, Si, to prevent segregation and to reduce line of segragation hardness; 5) by the interpolation of Cu, Ni,, prevent the intrusion of hydrogen to form passivating film.Therefore, the high grade pipe line steel welded joint must be acicular ferrite and a spot of bainite structure of the densification under the low-carbon (LC), the hardness that welding point is lower, also having characteristics is low-sulfurs, concerning the high grade pipe line steel welded joint, these three factors are all to accomplish, not so the anti-H 2 S performance just can not guarantee, high strength and low-temperature flexibility also are difficult to obtain.How to guarantee the obdurability and the low-temperature flexibility of welding point, be used for the pipe line steel welding wire for submerged-arc welding both at home and abroad and have the GB2090615 of nineteen eighty-two Britain application " little molybdenum or do not have the welding material of molybdenum " " WELDING MATERIALSCONTAINING LITTLE MOLYBDENUM ", publication number GB2090615, open date 14.07.1982, Patent Granted with effect from 24.10.1984 (Section 25 (1)) with titleWELDING MATERIALS CONTAINING LITTLE MOLYBDENUM), its alloy is C-Mn-Cr-(Mo)-Ti-B; 92 years General Institute of Iron and Steel, Ministry of＜atallurgical Industry etc. have applied for " low carbon micro alloyed submerged-arc welding wire ", patent No. ZL92105621.4, and publication number 1068528, open date 1993.02.03, its alloy is C-Mn-Mo; The disclosed solder wire material weak point of these patent documentations is that pearlitic generation is arranged in the weld seam, has reduced toughness, and intensity can not satisfy the instructions for use of high grade pipe line steel.Wuhan Iron ﹠ Steel (Group) Corp. had developed " low-alloy high-strength and high-toughness submerged-arc welding electrode " in 1997, patent No. ZL97104393.0, publication number 1200317, open date 1998.12.02.Calendar year 2001, Wuhan Iron ﹠ Steel (Group) Corp. developed " high-performance pipe line steel welding wire for submerged-arc welding ", patent No. ZL01106520.6, publication number 1305879, open date 2001.08.01, its alloy is C-Mn-Cr-Ni-Ti-B, this welding wire is compared with traditional welding wire, and performance has had raising by a relatively large margin, but only depends on weld seam acicular ferrite structure to be difficult to form passivating film opposing H
2The intrusion of hydrogen among the S, and yield strength is difficult to satisfy the requirement of X80 level pipeline pipeline steel.
Summary of the invention
For obdurability and the low-temperature flexibility that solves the high grade pipe line steel welded joint, the solder wire material of submerged-arc welding that the purpose of this invention is to provide a kind of used for high grade pipe line steel, use with the alkalescent sintered flux coupling, the welding high grade pipe line steel, the postwelding weld seam can satisfy obdurability, low-temperature flexibility and the anti-H of high grade pipe line steel
2The requirement of S corrosive nature.
The technical solution adopted in the present invention is: solder wire material of submerged-arc welding for high grade pipeline steel, this material is composed of the following components by weight percentage: 0.030%～0.080% C, 0.010%～0.200% Si, 1.500%～2.000% Mn, 1.000%～1.500% Ni, 0.200%～0.300% Mo, 0.200%～0.300% Cu, 0.020%～0.040% Ti, 0.100%～0.250% Ce, surplus is Fe, and the weight sum of each component is 100%.
The invention has the beneficial effects as follows:
1. C is controlled at 0.03%～0.08% in the solder wire material, Mn is controlled at 1.5%～2.0%, C can impel the formation of acicular ferrite, and minimizing grain boundary ferrite, Mn is one of main alloy element of proof strength, this element can reduce the transition temperature of γ → α effectively, suppresses the formation of crystal boundary pro-eutectoid ferrite, impels and forms acicular ferrite structure in the weld seam.At C content is 0.03%～0.08%, and Mn can guarantee the acquisition of high tenacity in 1.5%～2.0% scope;
2.Si be controlled at 0.01%～0.15%, when Mn, Si exist simultaneously, can be used as deoxidier, increase with the Si constituent content, the phase transition temperature in the time of can making continuous the cooling reduces gradually, structure refinement;
3.Ni be controlled at 1.0%～1.5%, Ni can improve cold-crack resistance and can and improve low-temperature impact toughness, this mainly is because Ni can improve the toughness of ferrite matrix and promote acicular ferrite to form;
4.Mo be controlled at 0.2%～0.3%, contain in the Mn weld seam and add Mo, pro-eutectoid ferrite quantity reduces gradually, and the acicular ferrite ratio begins to increase, and reduces subsequently; The general grain refinement of coarse grain zone and fine grained region, the incomplete transformation district forms ferrite and carbide bundle group, and the hardness of weld seam, yield point and tensile strength all are improved;
5.Cu be controlled at 0.2%～0.3%, the characteristics that contain the Cu seam organization are to contain a high proportion of acicular ferrite (AF), Cu is remarkable refinement acicular ferrite to the main influence of acicular ferrite, and another characteristics are to improve the percentage by volume of two second phases;
6.Ti be controlled at 0.02%～0.04%, add Ti in the weld metal, intensity is slightly improved, the oxidisability field trash (TiO) of titaniferous has promoted at austenite crystal intragranular forming core, help the generation of intracrystalline acicular ferrite, and TiN has very high high-temperature stability, is suppressed at the growth process that austenite grain boundary moves and crystal grain is annexed mutually under the high heat input effectively, can guarantee that weld metal has good Charpy-V impact power and COD value;
7.Ce rare earth is controlled at 0.1%～0.25%, after the Ce rare earth element adds weld seam, can be enriched in the silicate inclusion, make inclusion balling, and distribute with disperse state, thereby the forming core that helps acicular ferrite (AF) has suppressed pro-eutectoid ferrite (PF), makes seam organization obtain refinement;
In order to guarantee that welding point has high toughness and anti-H
2The S stress corrosion performance, the impurity S in the control material is lower than 0.005%, and P is lower than 0.015%.
Welding wire of the present invention adopts conventional electric furnace smelting method to make, and notices during smelting that Cu, Ce, Ti-Fe, Mo-Fe add when refining, and the control tapping temperature is 1550 ± 20 ℃.
Welding wire of the present invention and alkalescent sintered flux coupling are used, and can carry out welding condition is electric current 800～1000, weldingvoltage 32～35V, the large-line energy welding of weldering speed 26～30m/h.
The present invention has following characteristics:
1, stable being easy to of welding wire steel smelting process of the present invention realized better performances such as the drawing of the rolling and welding wire of steel billet, copper facing.
2, welding wire of the present invention is used for σ
s〉=550Mpa and above intensity rank pipe line steel and the welding of other structural steel, the weld strength height, impact flexibility and cryogenic property satisfy the requirement of high grade pipe line steel, and weld seam has performances such as better anti-H2S stress corrosion, and weld strength and toughness can be mated with the base material of high grade pipe line steel fully.
3, adopt welding wire welding of the present invention can adapt to the process characteristic of pipe line steel Double Wire Welding or multifibres weldering and front and back, inside and outside silk high-speed welding.
4, welding wire weld structure of the present invention is as-welded is acicular ferrite and bainite structure, therefore has high strength and good low-temperature toughness.
Description of drawings
Fig. 1 is the metallographic structure of welding wire of the present invention;
Fig. 2 is the metallographic structure of carrying out welded seam with the present invention.
The specific embodiment
The present invention is described in detail below in conjunction with embodiment.
Embodiment 1
Get 0.038% C by weight percentage, 0.040% Si, 1.800% Mn, 1.460% Ni, 0.270% Mo, 0.240% Cu, 0.025% Ti, 0.150% Ce, 95.977% Fe, smelt with conventional electric furnace smelting method, add Cu, Ce, Ti-Fe, Mo-Fe during refining, the control tapping temperature is 1550 ℃, and impurity S is lower than 0.005% in the control material, P is lower than 0.015%, and the welding wire metallographic structure that makes is referring to Fig. 1.
This welding wire and SJ101G solder flux coupling, welding 15mm thick X 80 pipe line steel, the chemical composition of steel mainly contains 0.06% C by weight percentage, 1.57% Mn, 0.24% Si, 0.29% Mo, 0.14% Ni, 0.045% Cu, 0.04% Nb, 0.013% Ti, 0.0006% B, 0.01% V, 0.005% S, 0.033% P.Welding procedure is asymmetric X type groove, each weldering one of positive and negative, and back root cleaning, welding condition are first 580A of welding current, second 650A, weldingvoltage 32V welds fast 26m/h.The metallographic structure of gained weld seam is referring to Fig. 2.
Welding point is tested by API 5L standard, and cold-bending property is qualified, and stretching and Hardness Surveillance result are as shown in table 1, and the impact assay is as shown in table 2.
Table 1 X80 level pipe line steel welding point stretches and hardness test
| Project | σ s(Mpa) | σ b(Mpa) | σ s/σ b | δ 5％ | The fracture place | Hardness (Hv10) |
| Coupling SJ101G | 566～625 | 674～723 | 0.84～0.87 | 23～25 | HAZ | 193～238 |
| Requirement | ≥551 | 620～827 | ≤0.93 | ≥18 | / | ≤240 |
Table 2 X80 level pipe line steel welding point impact test
| Project | Temperature | Weld seam | The heat affected area |
| (℃) | Akv/J | DWTT/SA，％ | Akv/J | DWTT/SA，％ | |
| Coupling SJ101G | Room temperature | 206～221 | 90～97 | 220～245 | 97～100 |
| -20 | 172～196 | 85～93 | 175～201 | 90～98 | |
| Requirement | -20 | The Akv value, single minimum 〉=90, average 〉=120 | |||
Embodiment 2
Get 0.030% C by weight percentage, 0.100% Si, 2.000% Mn, 1.330% Ni, 0.200% Mo, 0.300% Cu, 0.040% Ti, 0.250% Ce, 95.750% Fe smelts with conventional electric furnace smelting method, add Cu, Ce, Ti-Fe, Mo-Fe during refining, the control tapping temperature is 1570 ℃, and impurity S is lower than 0.005% in the control material, and P is lower than 0.015%.
This welding wire and SJ101G solder flux coupling, welding 15mm thick X 80 pipe line steel, the chemical composition of steel and welding procedure are with embodiment 1.Welding point is tested by API 5L standard, and cold-bending property is qualified, and stretching and Hardness Surveillance result are as shown in table 3, and the impact assay is as shown in table 4.
Table 3 X80 level pipe line steel welding point stretches and hardness test
| Project | σ s(Mpa) | σ b(Mpa) | σ s/σ b | δ 5％ | The fracture place | Hardness (Hv10) |
| Coupling SJ101G | 584～635 | 692～744 | 0.84～0.87 | 22～24 | HAZ | 201～240 |
Table 4 X80 level pipe line steel welding point impact test
| Project | Temperature (℃) | Weld seam | The heat affected area | ||
| Akv/J | DWTT/SA，％ | Akv/J | DWTT/SA，％ | ||
| Coupling SJ101G | Room temperature | 196～219 | 90～96 | 215～246 | 96～100 |
| -20 | 169～193 | 85～92 | 170～210 | 90～97 | |
Embodiment 3
Get 0.053% C by weight percentage, 0.010% Si, 1.500% Mn, 1.030% Ni, 0.280% Mo, 0.200% Cu, 0.030% Ti, 0.100% Ce, 96.797% Fe smelts with conventional electric furnace smelting method, add Cu, Ce, Ti-Fe, Mo-Fe during refining, the control tapping temperature is 1560 ℃, and impurity S is lower than 0.005% in the control material, and P is lower than 0.015%.
This welding wire and SJ101G solder flux coupling, welding 15mm thick X 80 pipe line steel, the chemical composition of steel and welding procedure are with embodiment 1.Welding point is tested by API 5L standard, and cold-bending property is qualified, and stretching and Hardness Surveillance result are as shown in table 5, and the impact assay is as shown in table 6.
Table 5 X80 level pipe line steel welding point stretches and hardness test
| Project | σ s(Mpa) | σ b(Mpa) | σ s/σ b | δ 5％ | The fracture place | Hardness (Hv10) |
| Coupling SJ101G | 588～615 | 689～751 | 0.84～0.87 | 23～25 | HAZ | 199～238 |
Table 2 X80 level pipe line steel welding point impact test
| Project | Temperature (℃) | Weld seam | The heat affected area | ||
| Akv/J | DWTT/SA，％ | Akv/J | DWTT/SA，％ | ||
| Coupling SJ101G | Room temperature | 196～224 | 90～98 | 230～258 | 97～100 |
| -20 | 172～196 | 85～93 | 180～214 | 90～98 | |
Embodiment 4
Get 0.080% C by weight percentage, 0.150% Si, 1.600% Mn, 1.200% Ni, 0.250% Mo, 0.260% Cu, 0.022% Ti, 0.200% Ce, 96.238% Fe smelts with conventional electric furnace smelting method, add Cu, Ce, Ti-Fe, Mo-Fe during refining, the control tapping temperature is 1530 ℃, and impurity S is lower than 0.005% in the control material, and P is lower than 0.015%.
This welding wire and SJ101G solder flux coupling, welding 15mm thick X 80 pipe line steel, the chemical composition of steel and welding procedure are with embodiment 1.Welding point is tested by API 5L standard, and cold-bending property is qualified, and stretching and Hardness Surveillance result are as shown in table 7, and the impact assay is as shown in table 8.
Table 7 X80 level pipe line steel welding point stretches and hardness test
| Project | σ s(Mpa) | σ b(Mpa) | σ s/σ b | δ 5％ | The fracture place | Hardness (Hv10) |
| Coupling SJ101G | 594～645 | 689～743 | 0.84～0.87 | 21～23 | HAZ | 212～240 |
Table 8 X80 level pipe line steel welding point impact test
| Project | Temperature (℃) | Weld seam | The heat affected area | ||
| Akv/J | DWTT/SA，％ | Akv/J | DWTT/SA，％ | ||
| Coupling SJ101G | Room temperature | 195～222 | 89～98 | 202～234 | 97～100 |
| -20 | 165～189 | 85～93 | 170～195 | 90～95 | |
Embodiment 5
Get 0.070% C by weight percentage, 0.200% Si, 1.930% Mn, 1.000% Ni, 0.220% Mo, 0.220% Cu, 0.020% Ti, 0.250% Ce, 96.090% Fe smelts with conventional electric furnace smelting method, add Cu, Ce, Ti-Fe, Mo-Fe during refining, the control tapping temperature is 1540 ℃, and impurity S is lower than 0.005% in the control material, and P is lower than 0.015%.
This welding wire and SJ101G solder flux coupling, welding 15mm thick X 80 pipe line steel, the chemical composition of steel and welding procedure are with embodiment 1.Welding point is tested by API 5L standard, and cold-bending property is qualified, and stretching and Hardness Surveillance result are as shown in table 9, and the impact assay is as shown in table 10.
Table 9 X80 level pipe line steel welding point stretches and hardness test
| Project | σ s(Mpa) | σ b(Mpa) | σ s/σ b | δ 5％ | The fracture place | Hardness (Hv10) |
| Coupling SJ101G | 584～642 | 690～735 | 0.84～0.87 | 20～22 | HAZ | 209～236 |
Table 10 X80 level pipe line steel welding point impact test
| Project | Temperature (℃) | Weld seam | The heat affected area | ||
| Akv/J | DWTT/SA，％ | Akv/J | DWTT/SA，％ | ||
| Coupling SJ101G | Room temperature | 204～232 | 95～99 | 202～219 | 97～100 |
| -20 | 188～202 | 86～94 | 182～203 | 89～96 | |
Embodiment 6
Get 0.045% C by weight percentage, 0.019% Si, 1.700% Mn, 1.500% Ni, 0.300% Mo, 0.290% Cu, 0.035% Ti, 0.230% Ce, 95.881% Fe smelts with conventional electric furnace smelting method, add Cu, Ce, Ti-Fe, Mo-Fe during refining, the control tapping temperature is 1550 ℃, and impurity S is lower than 0.005% in the control material, and P is lower than 0.015%.
This welding wire and SJ101G solder flux coupling, welding 15mm thick X 80 pipe line steel, the chemical composition of steel and welding procedure are with embodiment 1.Welding point is tested by API 5L standard, and cold-bending property is qualified, and stretching and Hardness Surveillance result are as shown in table 11, and the impact assay is as shown in table 12.
Table 11 X80 level pipe line steel welding point stretches and hardness test
| Project | σ s(Mpa) | σ b(Mpa) | σ s/σ b | δ 5％ | The fracture place | Hardness (Hv10) |
| Coupling SJ101G | 563～615 | 668～716 | 0.84～0.87 | 23～25 | HAZ | 196～230 |
Table 12 X80 level pipe line steel welding point impact test
| Project | Temperature (℃) | Weld seam | The heat affected area | ||
| Akv/J | DWTT/SA，％ | Akv/J | DWTT/SA，％ | ||
| Coupling SJ101G | Room temperature | 224～242 | 94～98 | 220～245 | 97～100 |
| -20 | 212～220 | 89～96 | 175～200 | 90～98 | |
The present invention is the submerged-arc welding wire of a kind of high strength, high tenacity, high comprehensive performance, the σ of particularly suitable and microalloying controlled rolling and controlled cooling
sThe submerged arc welding of 〉=550Mpa high grade pipe line steel is applicable to the low-alloyed submerged arc welding of respective strengths grade high-strength degree simultaneously, and the chemical composition of welding wire of the present invention also can be made into other form welding with filling metal, as welding rod, gas shield welding wire and the welding band utmost point.
Claims (1)
1. solder wire material of submerged-arc welding for high grade pipeline steel, it is characterized in that this material is composed of the following components by weight percentage: 0.030%～0.080% C, 0.010%～0.200% Si, 1.500%～2.000% Mn, 1.000%～1.500% Ni, 0.200%～0.300% Mo, 0.200%～0.300% Cu, 0.020%～0.040% Ti, 0.100%～0.250% Ce, surplus is Fe, the weight sum of each component is 100%.
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| CN 200410073353 CN1285444C (en) | 2004-12-06 | 2004-12-06 | Solder wire material of submerged-arc welding for high grade pipeline steel |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102267021B (en) * | 2010-06-07 | 2014-12-03 | 鞍钢股份有限公司 | Submerged arc welding wire for pipeline steel and manufacturing method thereof |
| CN102019516A (en) * | 2010-11-01 | 2011-04-20 | 西安理工大学 | Solder wire for submerged arc welding of X100 pipeline steel and preparation method thereof |
| CN103056555B (en) * | 2013-01-23 | 2016-03-30 | 宝山钢铁股份有限公司 | The anti-H of a kind of pipeline low cost 2s welding wire for submerged-arc welding |
| CN103317257B (en) * | 2013-06-20 | 2015-04-22 | 西安理工大学 | High-strength high-tenacity submerged arc welding wires for bainite steel |
| CN107598409A (en) * | 2017-08-21 | 2018-01-19 | 洛阳双瑞特种合金材料有限公司 | Gas shielded solid welding wire and preparation method for yield strength 460MPa steel |
| CN110181195B (en) * | 2019-05-28 | 2021-07-30 | 阳江职业技术学院 | Material for submerged arc welding for X100 pipeline steel |
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