CN1285256A - Preparation of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding - Google Patents
Preparation of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding Download PDFInfo
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- CN1285256A CN1285256A CN 99117835 CN99117835A CN1285256A CN 1285256 A CN1285256 A CN 1285256A CN 99117835 CN99117835 CN 99117835 CN 99117835 A CN99117835 A CN 99117835A CN 1285256 A CN1285256 A CN 1285256A
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- 238000003466 welding Methods 0.000 title claims abstract description 58
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 15
- 239000002184 metal Substances 0.000 abstract description 15
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 13
- 230000004927 fusion Effects 0.000 description 11
- 239000011572 manganese Substances 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 9
- 239000006004 Quartz sand Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 4
- 239000010436 fluorite Substances 0.000 description 4
- 239000004579 marble Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910000018 strontium carbonate Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 235000012041 food component Nutrition 0.000 description 1
- 239000005417 food ingredient Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- -1 manganese metals Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000019351 sodium silicates Nutrition 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The present invention belongs to an electrode preparation technology for manual metal are welding in the field of welding material, and is specially applicable to heterogeneous welding of Cr-Mo and Cr-Mo-V type pearlitic refractory steel member. In long-peroid high-tempi service process of heterogeneous joint, two sides of its bond interface has no production of increased or poor carbon layer. The chemical components (wt%) of said electrode are (0.06-0.1)C; (5.5-7.0)Cr; (9.0-15)Mn; (10-12)Ni; (0.5-0.9)Si; (0.4-0.6)Mo; (0.1-0.2)Ti, both S and P of less than 0.03. The coating of said electrode is divided into acidic and alkaline.
Description
The invention belongs to the technology of preparing of the welding bar for hand electric arc-welding in the field of welding material.Be specially adapted to the heterogeneous welding of Cr-Mo, Cr-Mo-V class pearlite refractory steel.
At present, high temperature pressure vessel and the process pipelines in the petrochemical plant uses Cr-Mo steel material in a large number both at home and abroad, and this class material members mainly adopts austenite stainless steel-made welding rod, welding wire welding.According to people such as J.Pavlovsky at " Materials Science and Engineering " (Material Science andEngineering) A149 (105 pages) in 1991 and C.D.Lundin at " welding journal " (WeldingJournal) the article report on February nineteen eighty-two (58 pages): the heterogeneous joint of Cr-Mo steel high temperature be on active service or ag(e)ing process in, carburetting layer (weld metal one side), carbon poor layer (mother metal one side) can appear in the fused interface both sides, mother metal one side intensity descends near causing fused interface, weld metal one side hardness increases, and toughness reduces.With the prolongation of active time, carburetting layer width is parabolic to be increased.According to another R.L.Klueh and J.F.King at the article report on " pressure vessel technology journal " (Journal of Pressure VesselTechnology) in August, 1985 Vol.107 (247 pages) such as " welding journal " (Welding Journal) September nineteen eighty-two (302 pages) and D.I.Roberts: because increase, the appearance of carbon poor layer, cause the marked change of performance in the heterogeneous joint fusion area narrow zone, make the fusion area become the weak part of whole member, take place easily to lose efficacy in advance and fracture accident.
The objective of the invention is, a kind of welding bar for hand electric arc-welding of the Cr-Mo of welding class pearlite refractory steel is provided, weld with this kind welding rod, the heterogeneous joint fusion area that can reduce and suppress its military service increases, the generation of carbon poor layer, and then the Problem of Failure in advance of the heterogeneous joint of austenite stainless steel-made welding rod welding, the service life and the security of operation of raising member were adopted in solution in the past.
Technical scheme of the present invention is, select a kind of low C, low Cr, high Mn, certain ni content for use, and add the core wire of the austenite structure alloy of Mo, Ti, Si element as welding bar for hand electric arc-welding, this welding rod and the welding of Cr-Mo steel, its heterogeneous joint in the long service process, the fusion area do not produce increase, carbon poor layer.
Below provide specific embodiments of the present invention in detail:
The core wire chemical composition (%) of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding:
(0.06～0.1)C；(5.5～7.0)Cr；(9.0～15)Mn；(10～12)Ni；(0.5～0.9)Si；(0.4～0.6)Mo；(0.1～0.2)Ti；S、P＜0.03。Adopt industrial non-vacuum induction furnace to smelt according to a conventional method, the standard according to GB4241-84 is processed into welding wire.On the coating of welding electrode machine, carry out the preparation of welding rod as core wire with resulting welding wire.
The electrode coating composition is:
Acid: 5.0～10% marble; 8.0～10% fluorite; 20～25% rutile; 10～15% feldspar; 10～15% white clay; 4.0～6.0% mica; 4.0～6.0% quartz sand; 18～20% manganese metals; 8.0～15% titanium dioxide.Alkaline low-hydrogen type: 44～46% marble; 26～30% fluorite; 2.0～2.5% quartz sand; 8.0～10% manganese metal; 4.0～6.0% industrial silicon; Ferrotianium 3.0～5.0%; Titanium dioxide 2.0～6.5%; Strontium carbonate 3.0～5.0%.Alkalescence modified: 20～25% marble; 16～18% fluorite; 2.0～4.5% quartz sand; 9.0～12% manganese metal; 2.5～4.0% industrial silicon; 1.5～2.5% titanium dioxide; Ferrotianium 3.0～5.0%; 3.0～5.0% strontium carbonate.
(1) welding wire smelting process
Smelt food ingredient with industrial non-vacuum induction furnace: 0.08%C, 6.0%Cr, 11%Ni, 13%Mn, 0.5%Mo, 0.1%Ti, S, P＜0.03%.Raw material employing No. 1 Ni, metal M n, Cr, Mo, Ti, crystallization Si, technical pure Fe.The slotting aluminum strip deoxidation in preceding 2～3 minutes of tapping.Refining period, temperature was 1590～1610 ℃, 15 minutes time; 1560～1580 ℃ of tapping temperatures; 1460～1480 ℃ of pouring temperatures are annotated in the employing, and calm 60～80 seconds time, depositing funnel collimation running channel center forms the billet of diameter phi 80mm.Smelt back composition: 0.08%C, 6.12%Cr, 11.01%Ni, 13.14%Mn, 0.31%Mo, 0.19%Ti, S＜0.03%, P＜0.03%.
(2) Forging Technology
1060 ℃ of initial forging temperatures; Final forging temperature is greater than 860 ℃.Be swaged into the square billet of 55 * 55mm.
(3) hot rolling technology
The square billet of 55 * 55mm rolls into the wire rod of φ 12mm.Surface of steel ingot is carried out emery wheel reconditioning cleaning before rolling; 1100～1160 ℃ of start rolling temperatures; Finishing temperature is greater than 900 ℃; Steel is sent in the continuous coal-fired furnace of two-period form stokehold; Air cooling.
(4) welding wire preparation technology
Technological process is as follows: φ 12mm wire rod through solution treatment, alkali soak, cleaning, pickling, coating, drying, cold-drawn, removing coating, soft annealing, make the welding wire wire rod of soft attitude φ 3.2mm at last.1050～1150 ℃ of wherein molten admittedly treatment temperatures; The composition of the lubricant coating aqueous solution is 6～10% sodium chloride+25～30% lime; 850 ± 10 ℃ of softening annealing temperatures are incubated 2 hours; Drawing passes is φ 12～φ 10～φ 9.0～φ 8.0～φ 7.0～φ 6.5～φ 6.0～φ 4.8～φ 4.0～φ 3.4～φ 3.2mm.
(5) preparation of welding rod
Adopting model is 25 tons of coating of welding electrode machines of TL-25A, and pressing pressure 8～12MPa carries out the compacting of alkaline low-hydrogen type welding rod.The core wire of welding rod is soft attitude φ 3.2mm welding wire.The electrode coating composition is: the manganese metal of 46% marble, 28% fluorite, quartz sand 2.5%, 8.0%, 6.0% industrial silicon, ferrotianium 3.0% titanium dioxide 6.5%, strontium carbonate 5.0%.Powder particles 80～100 orders.Binding agent adopts modulus 2.8～3.2 sodium silicates, and concentration is 48～50 ° of Br, carries out check, the packing of welding rod according to the regulation of GB983-85.
(6) welding procedure of welding rod
The welding rod bake out temperature is 250～300 ℃, insulation 1.5h.Mother metal is selected the Cr5Mo steel pipe for use, and diameter is that φ 160mm, wall thickness are 12mm, and the butt joint gap is 2.0～4.0mm, adopts Y type groove, and the welding bead number of plies is 3 layers, 60 ° of bevel angles, and the pier limit is of a size of 1.0 ± 0.5mm.The welding of employing dc welding machine, welding current is 60～90A, interlayer temperature is 150～160 ℃.
(7) Mechanics Performance Testing of heterogeneous joint
After tested, the mechanical property of the heterogeneous joint of Cr5Mo steel of employing low Cr and high Mn austenitic steel welding rod (representing with H) welding has reached the same stratification levels of A302/Cr5Mo joint, and performance data contrasts as following table.
Heterogeneous joint mechanical property tables of data
| σ b(MPa) | σ 0.2(MPa) | δ 5(％) | ψ(％) | A KV(J) | |
| H/Cr5Mo | 530 | 315 | 29 | 64 | 148 |
| A302/Cr5Mo | 519 | 311 | 23.6 | 70.5 | 100 |
(8) heterogeneous joint fusion area tissue before and after the timeliness
Narrate heterogeneous joint fusion area, timeliness front and back tissue in conjunction with the accompanying drawings:
Accompanying drawing is heterogeneous joint fusion area metallographic structure figure (multiplication factor is 400 times, and A represents the austenitic steel weld metal among the figure, and Cr5Mo represents base metals) under 700 ℃ of different aging times.
(a) is the fusion area tissue of nonageing among the figure, and weld metal one side of heterogeneous joint fused interface does not have the carburetting layer and produces;
(b) is the fusion area tissue of timeliness 10h among the figure, and the timeliness initial stage (700 ℃, 10h) the carburetting layer of certain width (2～3 μ m) appears in weld metal one side of heterogeneous joint fused interface;
(c) is the fusion area tissue of timeliness 50h among the figure, and with the prolongation of timeliness time, the carburetting layer of weld metal one side narrows down gradually;
(d) is the fusion area tissue of timeliness 100h among the figure, as seen from the figure, through 700 ℃ of timeliness 100h, the carburetting layer complete obiteration of weld metal one side.
The above results shows, low Cr and high Mn austenitic steel welding bar for hand electric arc-welding, welding Cr5Mo steel can obviously reduce and suppress the generation of heterogeneous joint fused interface both sides carburetting layer (weld metal one side), carbon poor layer (mother metal one side), improves service life and the security of operation of member.
This kind components of welding electrode is reasonable in design, and manufacture craft is simple, and function admirable is with low cost, is applicable to weld Cr-Mo, Cr-Mo-V class refractory steel, also can be widely used in the welding of potassium steel and Hi-Stren steel member.
Claims (1)
1. the preparation of a low Cr and high Mn austenitic steel welding bar for hand electric arc-welding is characterized in that: the core wire composition is (%): (0.06～0.1) C; (5.5～7.0) Cr; (9.0～15) Mn; (10～12) Ni; (0.5～0.9) Si; (0.4～0.6) Mo; (0.1～0.2) Ti; S, P＜0.03.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117835A CN1089048C (en) | 1999-08-23 | 1999-08-23 | Preparation of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117835A CN1089048C (en) | 1999-08-23 | 1999-08-23 | Preparation of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding |
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| Publication Number | Publication Date |
|---|---|
| CN1285256A true CN1285256A (en) | 2001-02-28 |
| CN1089048C CN1089048C (en) | 2002-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99117835A Expired - Fee Related CN1089048C (en) | 1999-08-23 | 1999-08-23 | Preparation of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091885A (en) * | 2010-12-31 | 2011-06-15 | 上海狮百盛焊材科技有限公司 | Cr-Mo-Al series welding rod for low-alloy and high-strength steel |
| CN103056554A (en) * | 2013-01-29 | 2013-04-24 | 大连海事大学 | Formula of iron-based shape memory alloy electrode and manufacturing method of iron-based shape memory alloy electrode |
| CN111590237A (en) * | 2020-05-26 | 2020-08-28 | 南京钢铁股份有限公司 | Arc welding electrode for ultralow-temperature high-manganese steel and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62224493A (en) * | 1986-03-24 | 1987-10-02 | Kobe Steel Ltd | Wire for welding 9cr-2mo steel |
| RU2069136C1 (en) * | 1994-05-06 | 1996-11-20 | Виктор Михайлович Кирьяков | Arc welding electrode |
| JP3283769B2 (en) * | 1996-10-29 | 2002-05-20 | 株式会社神戸製鋼所 | Gas shielded arc weld metal of high strength Cr-Mo steel and gas shielded arc welding method |
-
1999
- 1999-08-23 CN CN99117835A patent/CN1089048C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091885A (en) * | 2010-12-31 | 2011-06-15 | 上海狮百盛焊材科技有限公司 | Cr-Mo-Al series welding rod for low-alloy and high-strength steel |
| CN102091885B (en) * | 2010-12-31 | 2012-10-03 | 上海狮百盛焊材科技有限公司 | Cr-Mo-Al series welding rod for low-alloy and high-strength steel |
| CN103056554A (en) * | 2013-01-29 | 2013-04-24 | 大连海事大学 | Formula of iron-based shape memory alloy electrode and manufacturing method of iron-based shape memory alloy electrode |
| CN103056554B (en) * | 2013-01-29 | 2015-04-15 | 大连海事大学 | Formula of iron-based shape memory alloy electrode and manufacturing method of iron-based shape memory alloy electrode |
| CN111590237A (en) * | 2020-05-26 | 2020-08-28 | 南京钢铁股份有限公司 | Arc welding electrode for ultralow-temperature high-manganese steel and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1089048C (en) | 2002-08-14 |
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