CN105234592A - High-strength-level single-side welding and double-side forming root welding welding bar - Google Patents
High-strength-level single-side welding and double-side forming root welding welding bar Download PDFInfo
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- CN105234592A CN105234592A CN201510666145.XA CN201510666145A CN105234592A CN 105234592 A CN105234592 A CN 105234592A CN 201510666145 A CN201510666145 A CN 201510666145A CN 105234592 A CN105234592 A CN 105234592A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3602—Carbonates, basic oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0272—Rods, electrodes, wires with more than one layer of coating or sheathing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
Abstract
A high-strength-level single-side welding and double-side forming root welding welding bar is prepared from core welding wires H08A and a coating according to a traditional manner. The coating comprises marble, fluorite, soda ash, atomized ferrosilicon, microcrystalline cellulose, mid-carbon ferromanganese, barium carbonate, calcium aluminate, silica powder, nickel, ferro-molybdenum and pure sodium silicate. The welding bar is suitable for welding of pipe steel roots with the level being X100 or higher, a single-side welding and double-side forming effect can be achieved, the rate of welding defects such as air holes and mixed welding is low, Charpy impact energy of impact toughness can be 60 J or higher at the temperature of -40 DEG C, in the welding process, electric arcs are stable, splash is small, deslagging is easy, forming is attractive, and the welding bar has the beneficial effects of being low in cost, high in market popularization market and good in economical benefit.
Description
Technical field
The invention belongs to technical field of welding materials, especially a kind of high intensity levels one side welding with back formation root bead welding rod.
Background technology
Along with the fast development of pipeline engineering, the intensity rank of pipe line steel is more and more higher, also more and more higher to the technical requirement of wlding.In pipeline root bead welding rod, Cellulose-Congo red medium, because of problems such as stomata sensitivity are large, impact flexibility is low, can only be used for the pipe line steel welding of X70 and following rank; The low hydrogen type alkalescence root bead welding rods such as the LB52-U of Japan, the SR50D of Shuan Ruite material company are mainly used in the pipe line steel welding of X80 rank, and still belong to blank for the root bead welding rod of X100, X120 pipe line steel welding.
Above-mentioned Cellulose-Congo red medium can not meet the root bead welding requirements of X100 and above level pipeline pipeline steel.
Summary of the invention
For solving the root bead welding requirements of X100 and above level pipeline pipeline steel, the invention provides a kind of high intensity levels one side welding with back formation root bead welding rod, this welding rod is when all positon root bead welds, and one side welding with back formation effect is better, and weld defect rate is lower, the impact flexibility of weld(ing) deposit is stablized, spatter is less, and de-slag is easy, can meet the root bead welding requirements of X100 and above level pipeline pipeline steel, there is cost lower, larger marketing prospect and good economic benefit.
For achieving the above object, the present invention adopts following technical scheme:
A kind of high intensity levels one side welding with back formation root bead welding rod, high intensity levels refers to X100 and other pipe line steel of higher level, this welding rod is also made in the usual way by H08A core wire and coating, coating contains calcite and fluorite, soda ash, atomization ferrosilicon, microcrystalline cellulose, mid-carbon fe-mn, brium carbonate, calcium aluminate, silicon powder, metallic nickel, molybdenum-iron and pure sodium silicate, the CaO-CaF in coating
2-BaO-SiO
2-tiO
2-Al
2o
3form basic slag system, feature of the present invention is as follows:
Each component content by weight in coating is as follows:
Marble: 40 ~ 44.5; Fluorite: 8 ~ 12; Soda ash: 0.5 ~ 1.5; Atomization ferrosilicon: 4 ~ 7; Microcrystalline cellulose: 0.5 ~ 1; Mid-carbon fe-mn: 6 ~ 8; Brium carbonate: 4 ~ 8; Calcium aluminate: 3 ~ 6; Silicon powder: 1 ~ 3; Metallic nickel: 1 ~ 2; Molybdenum-iron: 0.5 ~ 1; Pure sodium silicate: 16 ~ 20;
Above-mentioned marmorean chemical composition need meet: CaCO
3>=98.0, S≤0.010, P≤0.010, requires that marmorean granularity reaches 60 orders;
The chemical composition of above-mentioned fluorite need meet: CaF
2>=95.0, SiO
2≤ 1.00, S≤0.010, P≤0.010, requires that the granularity of fluorite reaches 60 orders;
The chemical composition of above-mentioned soda ash need meet: Na
2cO
3>=98.0, require that the granularity of soda ash reaches 40 orders;
The chemical composition of above-mentioned atomization ferrosilicon need meet: Si:43.0 ~ 47.0, C≤0.020, S≤0.010, P≤0.010, requires that the granularity of atomization ferrosilicon reaches 100 orders;
The chemical composition of above-mentioned microcrystalline cellulose need meet: cellulose >=87, loss on drying≤7, requires that the granularity of microcrystalline cellulose reaches 80 orders;
The chemical composition of above-mentioned mid-carbon fe-mn need meet: C≤0.40, Mn:80.0 ~ 87.0, S≤0.020, P≤0.150, requires that the granularity of mid-carbon fe-mn reaches 40 orders;
The chemical composition of above-mentioned brium carbonate need meet: BaCO
3>=98.0, moisture≤0.30, S≤0.050, P≤0.050, requires that the granularity of brium carbonate reaches 120 orders;
The chemical composition of above-mentioned calcium aluminate need meet: CaO:29.0 ~ 31.0, Al
2o
3>=53, S≤0.010, P≤0.010, requires that the granularity of calcium aluminate reaches 60 orders;
The chemical composition of above-mentioned silicon powder need meet: SiO
2>=97.0, S≤0.010, P≤0.010, requires that the granularity of silicon powder reaches 120 orders;
The chemical composition of above-mentioned metallic nickel need meet: Ni >=99.5, S≤0.005, P≤0.005, requires that the granularity of metallic nickel reaches 60 orders;
The chemical composition of above-mentioned molybdenum-iron need meet: Mo >=55.0, C≤0.15, S≤0.008, P≤0.015, requires that the granularity of molybdenum-iron reaches 60 orders;
The chemical composition of above-mentioned pure sodium silicate need meet: Na
2o>=8.2, SiO
2>=26.0, S≤0.010, P≤0.010, requires that the modulus of pure sodium silicate equals 3.2 and its Baume degrees equals 43 ° of Be;
The chemical composition of above-mentioned H08A core wire need meet: C≤0.10, Mn:0.35 ~ 0.60, Si≤0.030, S≤0.030, P≤0.030.
Owing to adopting technical scheme described above, the present invention produces following good effect:
1, welding rod of the present invention is applicable to X100 and the welding of other pipe line steel root bead of higher level, one side welding with back formation effect can be formed, pore, the weld defect rate such as to be mingled with lower, impact flexibility can reach more than 60J at the Charpy-V impact power of-40 DEG C, there is arc stability in welding engineering, splash less, de-slag easily, be shaped the feature such as attractive in appearance.
2, to have cost lower for welding rod of the present invention, larger marketing prospect and good economic benefit.
Detailed description of the invention
The present invention is a kind of high intensity levels one side welding with back formation root bead welding rod, the root bead welding requirements of X100 and above level pipeline pipeline steel can be met, this welding rod is also made in the usual way by H08A core wire and coating, marble, brium carbonate, fluorite, calcium aluminate, the silicon powder of slag making and gas making is contained in coating, the manganese metal of deoxidation and alloy transition element, atomization ferrosilicon, metallic nickel and molybdenum-iron, the pure sodium silicate of binding agent and improve microcrystalline cellulose and the soda ash of extrusion.
In coating, the Main Function of each composition is summarized as follows:
Marble: Main Function is slag making, gas making, improves slag basicity, increases slag surface tension force and interfacial tension.Protect insufficient to deposited metal when marble addition is less than 40, arc-stabilising is also poor.When addition is greater than 44.5, can reduce speed of welding, molten iron becomes glutinous, easily make to produce pore in weld seam, and it is poor to be shaped.
Fluorite: Main Function is slag making.The fusing point of appropriate interpolation adjustable slag and viscosity, increase its mobility, to reach activation molten bath, to improve the object of de-slag and dehydrogenation.Fluorite addition lower than 8 time molten iron more glutinous, the diffusible hydrogen content of deposited metal is higher.When addition is greater than 12, arc stability is deteriorated, and reverse side is shaped poor.
Silicon powder: Main Function is slag making, refinement molten drop, the viscosity of adjustment slag and the activity of increase slag.Silicon powder addition can make the degraded toughness of deposited metal when being greater than 3.When silicon powder addition is less than 1, the activity of slag is deteriorated, and the removability of slag is also deteriorated.
Microcrystalline cellulose: Main Function improves extrusion.When microcrystalline cellulose addition is greater than 1, the diffusible hydrogen content of deposited metal is higher.Addition lower than 0.5 time welding rod extrusion be deteriorated.
Mid-carbon fe-mn: play desulfating and deoxidation, prevent hot-short effect, can also accelerate the fusing of welding rod, simultaneously also to transition Mn element in weld seam.Mn content when the addition of mid-carbon fe-mn is greater than 8 in weld metal is higher, and intensity is higher, and face of weld also easily produces pore simultaneously.Addition lower than 6 time welding process in desulfurization, deoxidation insufficient, in weld metal, Mn content is on the low side, degraded toughness.
Atomization ferrosilicon: play deoxidation, can accelerate welding rod fusing, improve the mobility of slag, reduce weld porosity sensitiveness, simultaneously also to transition Si element in weld seam.Si element when addition is greater than 7 in weld seam is higher, and the impact flexibility of weld seam is deteriorated.Addition lower than 4% time weld seam deoxidation insufficient, the mobility of slag is also deteriorated.
Calcium aluminate: the effect mainly playing slag making.The fusing point of appropriate interpolation adjustable slag and viscosity, increase its mobility, to reach activation molten bath, to improve the effect of sprawling, also plays the effect of the purification weld metals such as certain desulfurization simultaneously.When the addition of calcium aluminate is greater than 6, short circuiting transfer is serious, splashes larger.Addition lower than 3 time slag mobility be deteriorated, the spreadability of weld seam is deteriorated.
Brium carbonate: Main Function is gas making and slag making, improves the basicity of slag, the short slag of the slag of improvement.Splash when the addition of brium carbonate is greater than 8 comparatively large, deposited metal is sprawled narrower.The addition of brium carbonate is less than 4, and the reverse side of its weld metal is shaped and impact flexibility is deteriorated.
Metallic nickel: Main Function is transition alloy elements nickel, improves low-temperature impact toughness.When the addition of metallic nickel is greater than 2, molten iron becomes sticky, and deposited metal is sprawled narrower.When the addition of metallic nickel is less than 1, the impact flexibility of deposited metal is on the low side.
Molybdenum-iron: Main Function is transition alloy elements molybdenum, improves intensity.When the addition of molybdenum-iron is greater than 1, the intensity of deposited metal is higher, and low-temperature impact toughness declines.The low strength of deposited metal when the addition of molybdenum-iron is less than 0.5.
Soda ash: the slip increasing coating, makes medicinal powder not easily quick-drying, also has the effect of certain stabilising arc simultaneously.Welding rod easy moisture absorption when soda ash addition is greater than 1.5.Addition lower than 0.5 time to improve the effect of extrusion not obvious.
Pure sodium silicate: Main Function is bonding powder.When waterglass addition is greater than 20, extrusion pressure is less than normal, the packing of coating and weaken.When addition is less than 16, extrusion pressure is higher, and coating is scared, eccentric wayward.
Following table three embodiments provide the concrete proportioning of compositions of surfacing metal, all by weight.
According to each proportioning of upper table, each composition is carried out blending and stirs and can prepare coating, then H08A core wire and coating to be placed on welding rod machine processed and technology can produce welding rod of the present invention routinely.
Following table is the deposited metal composition reference value of three embodiments.
Following table is the deposited metal mechanical property reference value of three embodiments.
Above-mentioned each table can obviously be found out: its welding usability of welding rod of the present invention is good, and weld metal composition and mechanical property meet the requirement of AWSA5.5E9016-G standard.
Claims (1)
1. a high intensity levels one side welding with back formation root bead welding rod, high intensity levels refers to X100 and other pipe line steel of higher level, this welding rod is also made in the usual way by H08A core wire and coating, coating contains calcite and fluorite, soda ash, atomization ferrosilicon, microcrystalline cellulose, mid-carbon fe-mn, brium carbonate, calcium aluminate, silicon powder, metallic nickel, molybdenum-iron and pure sodium silicate, the CaO-CaF in coating
2-BaO-SiO
2-tiO
2-Al
2o
3form basic slag system, it is characterized in that:
Each component content by weight in coating is as follows:
Marble: 40 ~ 44.5; Fluorite: 8 ~ 12; Soda ash: 0.5 ~ 1.5; Atomization ferrosilicon: 4 ~ 7; Microcrystalline cellulose: 0.5 ~ 1; Mid-carbon fe-mn: 6 ~ 8; Brium carbonate: 4 ~ 8; Calcium aluminate: 3 ~ 6; Silicon powder: 1 ~ 3; Metallic nickel: 1 ~ 2; Molybdenum-iron: 0.5 ~ 1; Pure sodium silicate: 16 ~ 20;
Above-mentioned marmorean chemical composition need meet: CaCO
3>=98.0, S≤0.010, P≤0.010, requires that marmorean granularity reaches 60 orders;
The chemical composition of above-mentioned fluorite need meet: CaF
2>=95.0, SiO
2≤ 1.00, S≤0.010, P≤0.010, requires that the granularity of fluorite reaches 60 orders;
The chemical composition of above-mentioned soda ash need meet: Na
2cO
3>=98.0, require that the granularity of soda ash reaches 40 orders;
The chemical composition of above-mentioned atomization ferrosilicon need meet: Si:43.0 ~ 47.0, C≤0.020, S≤0.010, P≤0.010, requires that the granularity of atomization ferrosilicon reaches 100 orders;
The chemical composition of above-mentioned microcrystalline cellulose need meet: cellulose >=87, loss on drying≤7, requires that the granularity of microcrystalline cellulose reaches 80 orders;
The chemical composition of above-mentioned mid-carbon fe-mn need meet: C≤0.40, Mn:80.0 ~ 87.0, S≤0.020, P≤0.150, requires that the granularity of mid-carbon fe-mn reaches 40 orders;
The chemical composition of above-mentioned brium carbonate need meet: BaCO
3>=98.0, moisture≤0.30, S≤0.050, P≤0.050, requires that the granularity of brium carbonate reaches 120 orders;
The chemical composition of above-mentioned calcium aluminate need meet: CaO:29.0 ~ 31.0, Al
2o
3>=53, S≤0.010, P≤0.010, requires that the granularity of calcium aluminate reaches 60 orders;
The chemical composition of above-mentioned silicon powder need meet: SiO
2>=97.0, S≤0.010, P≤0.010, requires that the granularity of silicon powder reaches 120 orders;
The chemical composition of above-mentioned metallic nickel need meet: Ni >=99.5, S≤0.005, P≤0.005, requires that the granularity of metallic nickel reaches 60 orders;
The chemical composition of above-mentioned molybdenum-iron need meet: Mo >=55.0, C≤0.15, S≤0.008, P≤0.015, requires that the granularity of molybdenum-iron reaches 60 orders;
The chemical composition of above-mentioned pure sodium silicate need meet: Na
2o>=8.2, SiO
2>=26.0, S≤0.010, P≤0.010, requires that the modulus of pure sodium silicate equals 3.2 and its Baume degrees equals 43 ° of Be;
The chemical composition of above-mentioned H08A core wire need meet: C≤0.10, Mn:0.35 ~ 0.60, Si≤0.030, S≤0.030, P≤0.030.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510666145.XA CN105234592A (en) | 2015-10-15 | 2015-10-15 | High-strength-level single-side welding and double-side forming root welding welding bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510666145.XA CN105234592A (en) | 2015-10-15 | 2015-10-15 | High-strength-level single-side welding and double-side forming root welding welding bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105234592A true CN105234592A (en) | 2016-01-13 |
Family
ID=55032543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510666145.XA Pending CN105234592A (en) | 2015-10-15 | 2015-10-15 | High-strength-level single-side welding and double-side forming root welding welding bar |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6040689A (en) * | 1983-08-12 | 1985-03-04 | Kawasaki Steel Corp | Arc welding method of cr-mo steel for high temperature service |
| CN1807000A (en) * | 2005-01-21 | 2006-07-26 | 中国船舶重工集团公司第七二五研究所 | High-intensity high-cellulose welding rod |
| CN103878505A (en) * | 2013-11-29 | 2014-06-25 | 中国船舶重工集团公司第七二五研究所 | Root-welding welding rod capable of one-side welding and double-side forming |
| CN104259684A (en) * | 2014-07-29 | 2015-01-07 | 洛阳双瑞特种合金材料有限公司 | Self-protection flux-cored wire for welding X90 pipeline steel and manufacturing method of self-protection flux-cored wire |
| CN104759782A (en) * | 2015-04-24 | 2015-07-08 | 洛阳双瑞特种合金材料有限公司 | Alloy system electrode with low-tempering brittleness |
-
2015
- 2015-10-15 CN CN201510666145.XA patent/CN105234592A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6040689A (en) * | 1983-08-12 | 1985-03-04 | Kawasaki Steel Corp | Arc welding method of cr-mo steel for high temperature service |
| CN1807000A (en) * | 2005-01-21 | 2006-07-26 | 中国船舶重工集团公司第七二五研究所 | High-intensity high-cellulose welding rod |
| CN103878505A (en) * | 2013-11-29 | 2014-06-25 | 中国船舶重工集团公司第七二五研究所 | Root-welding welding rod capable of one-side welding and double-side forming |
| CN104259684A (en) * | 2014-07-29 | 2015-01-07 | 洛阳双瑞特种合金材料有限公司 | Self-protection flux-cored wire for welding X90 pipeline steel and manufacturing method of self-protection flux-cored wire |
| CN104759782A (en) * | 2015-04-24 | 2015-07-08 | 洛阳双瑞特种合金材料有限公司 | Alloy system electrode with low-tempering brittleness |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160113 |
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| RJ01 | Rejection of invention patent application after publication |