CN105108377A - Nickel alloy welding wire for welding cast iron pipe - Google Patents

Nickel alloy welding wire for welding cast iron pipe Download PDF

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Publication number
CN105108377A
CN105108377A CN201510498204.7A CN201510498204A CN105108377A CN 105108377 A CN105108377 A CN 105108377A CN 201510498204 A CN201510498204 A CN 201510498204A CN 105108377 A CN105108377 A CN 105108377A
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China
Prior art keywords
welding wire
welding
cast iron
silk
alloy
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CN201510498204.7A
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Chinese (zh)
Inventor
朱新军
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Jiangsu Xinhang Alloy Technology Co Ltd
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Jiangsu Xinhang Alloy Technology Co Ltd
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Priority to CN201510498204.7A priority Critical patent/CN105108377A/en
Publication of CN105108377A publication Critical patent/CN105108377A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/30Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3033Ni as the principal constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40Making wire or rods for soldering or welding

Abstract

The invention belongs to the technical field of welding, relates to a welding wire, discloses an alloy welding wire and particularly relates to a nickel alloy welding wire for welding a cast iron pipe. Chemical components of the welding wire comprise, by mass, 0%-0.30% of C, 0%-0.03% of Mn, 0%-0.60% of Si, 0%-0.020% of P, 0%-0.02% of S, 55.00%-85.00% of Ni and the balance iron. A method includes the steps of alloy smelting, electroslag remelting and the like. According to the mechanical properties of the welding wire, the yield strength is 300-600 Mpa, the tensile strength is 500-700 Mpa, the ductility is 10-40%, and impact strength is 56J. The mechanical properties of the welding wire are better than those of similar foreign products, and the welding wire can completely take the place of imported welding wires.

Description

A kind of welding cast iron pipe nickel alloy welding wire
Technical field
The invention belongs to welding technology field, relate to a kind of welding wire, is more particularly alloy welding wire, particularly relates to a kind of welding cast iron pipe nickel alloy welding wire and preparation technology thereof.
Background technology
Welding wire be gas welding or electric welding time melt and be filled in the wire of welding work pieces junction, the material of material usually with workpiece of welding wire is identical, and during welding wire welding, core wire metal accounts for a part for whole weld metal, so the chemical analysis of core wire, directly affect the quality of weld seam.
As special welding material, cast iron welding wire is indispensable at engineering fields such as foundry goods welding and defect repair.Because in cast iron, the impurity content such as sulphur, phosphorus is high, intensity is low, plasticity is poor, and its intrinsic coagulating property determines cast iron in REPAIR WELDING process, soldering district easily produces spoken parts in traditional operas or crackle, especially, under cold sweat condition, spoken parts in traditional operas and crackle tendency more greatly, have a strong impact on the machining property of foundry goods.
With regard to welding wire, the element such as manganese, silicon is all there is in cast iron welding wire, the existence of manganese, silicon has a strong impact on the performance of welding wire, the patent of invention patent No.: ZL200710203567.9, denomination of invention: a kind of solid normal temperature cast iron welding wire and preparation method thereof, disclose a kind of solid normal temperature cast iron welding wire and preparation method thereof, wherein Mn0.36-0.43%, Si0.01-0.03%, the content of the element such as manganese, silicon is higher, though the performance of product has lifting more in the past, but still the requirement of cast iron welding performance cannot be met, there is larger gap with imported product performance.
Summary of the invention
The object of the invention is to for above-mentioned the deficiencies in the prior art, provide a kind of welding cast iron pipe nickel alloy welding wire, welding wire prepared by the present invention can substituting import one, and welding wire performance is better than foreign same type product, reduces enterprise's production cost; Vacuum metling technique is applied on the basis optimizing component formula, optimizes feeding sequence, significantly reduce the content of impurity element manganese, silicon, promote welding wire properties of product.
Technical scheme of the present invention is achieved in that
A kind of welding cast iron pipe nickel alloy welding wire, the chemical composition mass percent of described welding wire is: C≤0.30%, Mn≤0.35%, Si≤0.80%, P≤0.020%, S≤0.02%, Ni50.00-90.00%, and surplus is iron.
The chemical composition mass percent of described welding wire is: C≤0.30%, Mn≤0.30%, Si≤0.60%, P≤0.020%, S≤0.02%, Ni52.00-85.00%, and surplus is iron.
The chemical composition mass percent of described welding wire is: C≤0.30%, Mn≤0.250%, Si≤0.50%, P≤0.020%, S≤0.02%, Ni55.00%, and surplus is iron.
A preparation method for welding cast iron pipe nickel alloy welding wire, comprises following processing step:
(1) alloy melting: the chemical composition mass percent according to welding wire is prepared burden, first drops into vaccum sensitive stove fusing, then after adding manganese sheet, monocrystalline silicon refining, pours into steel ingot by raw material by nickel block, pure iron;
(2) hot forging: the heating furnace described alloy pig being put into initial temperature≤600 DEG C heats, and is warming up to 1050 DEG C-1150 DEG C, best hot forging temperature makes the easiest cogging of alloy pig, simultaneously improving product performance.Temperature retention time: 55min-75min, after forge, be forged into alloy preform, be cooled to normal temperature;
(3) hot-roll annealing: the alloy preform described in step (2) is heated to 1000 DEG C-1100 DEG C and carries out hot rolling, is rolled into the first silk material of dish, is cooled to normal temperature in atmosphere;
(4) pickling, reconditioning: first for dish silk material sulfuric acid is carried out pickling, then repairs polishing;
(5) cold drawn: at room temperature will coil first silk material progressively drawing-down to silk material diameter 4mm;
(6) hydrogen moves back: the dish unit silk material hydrogen after cold drawn process is moved back process;
(7) draw: adopt continuous cold drawing process, by the silk material of diameter 4mm at continous way drawbench through 4-5 road drawing procedure, being drawn to diameter is 2.00mm-3.50mm;
(8) hydrogen moves back: after the dish unit silk material hydrogen after cold drawn process is moved back process, obtain welding cast iron pipe nickel alloy welding wire; The mechanical property requirements of the welding wire of preparation is: yield strength 300-600Mpa, tensile strength 500-700Mpa, percentage elongation 10-40%, impact strength 50-75J;
(9) drum: step (8) hydrogen is moved back the welding wire after process and turns to plate-like.
Described step (4) sulfuric acid or hydrochloric acid or phosphoric acid or nitric acid or hydrofluoric acid or acetic acid cleaning.
Compared with prior art, the Advantageous Effects that has of the present invention:
(1) welding wire of the present invention is by strictly controlling the content cooperative smelting process of manganese, element silicon, promote the performance of welding wire, silicon in welding wire has interests to form oxide-film on the surface of weld seam, improve the antioxygenic property of weld seam when high temperature, simultaneously or good deoxidier, the mobility of slag, deposite metal can be increased, in the prior art, the content of silicon is 0.5%, and exist and easily produce slag inclusion, the impact flexibility of product is low.The present invention, in welding wire component, optimizes the content of silicon, reduces slag inclusion amount, improves impact flexibility.Its impact strength is 50-75J, and slag inclusion amount reduces 2%.
(2) in welding wire, manganese is good desulfurizing agent, is also solution strengthening agent, improves intensity and the hardness of weld seam, in the prior art, the content of manganese is 0.4%, and the present invention is in welding wire component, the content of manganese is optimized further, improves the plasticity of welding wire, be convenient to the processing of small diameter welding wire.
(3) in preparation technology's alloy melting step of the present invention, optimize feeding sequence, first raw material is dropped into by nickel block, pure iron vacuum induction furnace fusing frequently, add manganese sheet, monocrystalline silicon refining again, coordinate best forge hot cogging temperature, the welding wire prepared of present invention process, through comparing with Korea S import solid core welding wire with domestic high nickel cast iron solid core welding wire, adopts the high nickel cast iron solid core welding wire deposited metal of above-mentioned formula and manufacturing process development to have higher wearability and antistrip performance.
(4) hydrogen annealing process is taked in step of preparation process of the present invention, reduce the hardness of welding wire, improve plasticity, eliminate stress, optimize metallurgical structure, make welding wire show light, exquisiteness, softness, nonmagnetic, make welding wire anti-fatigue performance good, Yan Li great.
(5) formulation optimization of the present invention, makes the toughness of welding wire greatly improve, can adopt continuous drawing technology, welding wire one-shot forming, and technique is simple, repeatedly drawing process of comparing, the energy-conservation energy, reduces production cost.
Detailed description of the invention
Raw material illustrate:
Raw material of the present invention adopt nickel element to be Jinchuan Nickel, purity >=99.9%; Ferro element is pure iron, purity >=99.0%; Manganese element is manganese metal, and purity >=99.0% is commercially available, can directly use.。
Below in conjunction with specific embodiment, the present invention is described in further detail, but do not form any limitation of the invention.
Embodiment 1
A kind of welding cast iron pipe nickel alloy welding wire, the chemical composition mass percent of welding wire is: C0.30%, Mn0.35%, Si0.80%, P0.020%, S0.02%, Ni50.00%, and surplus is iron.
The preparation method of welding cast iron pipe nickel alloy welding wire, comprises following processing step:
(1) alloy melting: the chemical composition mass percent according to welding wire is prepared burden, first drops into vaccum sensitive stove fusing, then after adding manganese sheet, monocrystalline silicon refining, pours into steel ingot by raw material by nickel block, pure iron;
(2) hot forging: the heating furnace described alloy pig being put into initial temperature 600 DEG C heats, and is warming up to 950 DEG C, temperature retention time: 55min, after forge, be forged into alloy preform, be cooled to normal temperature;
(3) hot-roll annealing: the alloy preform described in step (3) is heated to 1000 DEG C and carries out hot rolling, is rolled into the first silk material of dish, is cooled to normal temperature in atmosphere;
(4) pickling, reconditioning: first for dish silk material sulfuric acid is carried out pickling, then repairs polishing;
(5) cold drawn: at room temperature will coil first silk material progressively drawing-down to silk material diameter 4mm;
(6) hydrogen moves back: the dish unit silk material hydrogen after cold drawn process is moved back process;
(7) draw: adopt continuous cold drawing process, by the silk material of diameter 4mm at continous way drawbench through 4 road drawing procedure, being drawn to diameter is 2.00mm;
(8) hydrogen moves back: after the dish unit silk material hydrogen after cold drawn process is moved back process, obtain welding cast iron pipe nickel alloy welding wire;
(9) drum: step (8) hydrogen is moved back the welding wire after process and turns to plate-like.
Properties of product: yield strength 300Mpa, tensile strength 500Mpa, percentage elongation 10%, impact strength 50J.
Embodiment 2
A kind of welding cast iron pipe nickel alloy welding wire, the chemical composition mass percent of welding wire is: C0.30%, Mn0.30%, Si0.60%, P0.020%, S0.02%, Ni52.00%, and surplus is iron.
A preparation method for welding cast iron pipe nickel alloy welding wire, comprises following processing step:
(1) alloy melting: the chemical composition mass percent according to welding wire is prepared burden, first drops into vaccum sensitive stove fusing, then after adding manganese sheet, monocrystalline silicon refining, pours into steel ingot by raw material by nickel block, pure iron;
(2) hot forging: the heating furnace described alloy pig being put into initial temperature 225 DEG C heats, and is warming up to 1000 DEG C, temperature retention time: 75min, after forge, be forged into alloy preform, be cooled to normal temperature;
(3) hot-roll annealing: the alloy preform described in step (3) is heated to 11000 DEG C and carries out hot rolling, is rolled into the first silk material of dish, is cooled to normal temperature in atmosphere;
(4) pickling, reconditioning: first for dish silk material hydrochloric acid is carried out pickling, then repairs polishing;
(5) cold drawn: at room temperature will coil first silk material progressively drawing-down to silk material diameter 4mm;
(6) draw: adopt continuous cold drawing process, by the silk material of diameter 4mm at continous way drawbench through 5 road drawing procedure, being drawn to diameter is 3.50mm;
(7) hydrogen moves back: after the dish unit silk material hydrogen after cold drawn process is moved back process, obtain welding cast iron pipe nickel alloy welding wire;
(8) drum: step (8) hydrogen is moved back the welding wire after process and turns to plate-like.
The mechanical property of the welding wire of preparation: yield strength 350Mpa, tensile strength 550Mpa, percentage elongation 12%, impact strength 75J.
Embodiment 3
A kind of welding cast iron pipe nickel alloy welding wire, the chemical composition mass percent of welding wire is: C0.30%, Mn≤0.250%, Si0.50%, P0.020%, S0.02%, Ni55.00%, and surplus is iron.
The preparation method of welding cast iron pipe nickel alloy welding wire, comprises following processing step:
(1) alloy melting: the chemical composition mass percent according to welding wire is prepared burden, first drops into vaccum sensitive stove fusing, then after adding manganese sheet, monocrystalline silicon refining, pours into steel ingot by raw material by nickel block, pure iron;
(2) hot forging: the heating furnace described alloy pig being put into initial temperature 432 DEG C heats, and is warming up to 980 DEG C, temperature retention time: 60min, after forge, be forged into alloy preform, be cooled to normal temperature;
(3) hot-roll annealing: the alloy preform described in step (3) is heated to 1050 DEG C and carries out hot rolling, is rolled into the first silk material of dish, is cooled to normal temperature in atmosphere;
(4) pickling, reconditioning: first for dish silk material phosphoric acid is carried out pickling, then repairs polishing;
(5) cold drawn: at room temperature will coil first silk material progressively drawing-down to silk material diameter 4mm;
(6) hydrogen moves back: the dish unit silk material hydrogen after cold drawn process is moved back process;
(7) draw: adopt continuous cold drawing process, by the silk material of diameter 4mm at continous way drawbench through 5 road drawing procedure, being drawn to diameter is 3.00mm;
(8) hydrogen moves back: after the dish unit silk material hydrogen after cold drawn process is moved back process, obtain welding cast iron pipe nickel alloy welding wire; The mechanical property requirements of the welding wire of preparation is:
(9) drum: step (8) hydrogen is moved back the welding wire after process and turns to plate-like.
Welding wire properties of product: yield strength 414Mpa, tensile strength 600Mpa, percentage elongation 16%, impact strength 56J.
Embodiment 4
A kind of welding cast iron pipe nickel alloy welding wire, the chemical composition mass percent of described welding wire is: C0.01%, Mn0.088%, Si0.150%, P0.010%, S0.01%, Ni90.00%, and surplus is iron.
The preparation method of welding cast iron pipe nickel alloy welding wire, processing step is with embodiment 1, and different process step is: (4) pickling, reconditioning: first for dish silk material hydrofluoric acid is carried out pickling, then repairs polishing.
Properties of product: yield strength 450Mpa, tensile strength 620Mpa, percentage elongation 25%, impact strength 62J.
Embodiment 5
A kind of welding cast iron pipe nickel alloy welding wire, it is characterized in that: the chemical composition mass percent of described welding wire is: C0.180%, Mn0.052%, Si0.40%, P0.010%, S0.01%, Ni86.00, surplus is iron.
The preparation method of welding cast iron pipe nickel alloy welding wire, processing step is with embodiment 2 different process step: (4) pickling, reconditioning: first for dish silk material acetic acid is carried out pickling, then repairs polishing.
Properties of product: yield strength 500Mpa, tensile strength 590Mpa, percentage elongation 34%, impact strength 67J.
Embodiment 6
A kind of welding cast iron pipe nickel alloy welding wire, the chemical composition mass percent of welding wire is: C0.280%, Mn0.19%, Si0.50%, P0.016%, S0.014%, Ni85.00%, and surplus is iron.
The preparation method of welding cast iron pipe nickel alloy welding wire, processing step is with embodiment 3.
Properties of product: yield strength 600Mpa, tensile strength 700Mpa, percentage elongation 40%, impact strength 71J.

Claims (5)

1. a welding cast iron pipe nickel alloy welding wire, is characterized in that: the chemical composition mass percent of described welding wire is: C≤0.30%, Mn≤0.35%, Si≤0.80%, P≤0.020%, S≤0.02%, Ni50.00-90.00%, and surplus is iron.
2. welding cast iron pipe nickel alloy welding wire according to claim 1, is characterized in that: the chemical composition mass percent of described welding wire is: C≤0.30%, Mn≤0.30%, Si≤0.60%, P≤0.020%, S≤0.02%, Ni54.00-85.00%, surplus is iron.
3. welding cast iron pipe nickel alloy welding wire according to claim 1, it is characterized in that: the chemical composition mass percent of described welding wire is: C≤0.30%, Mn≤0.250%, Si≤0.50%, P≤0.020%, S≤0.02%, Ni55.00%, surplus is iron.
4. a preparation method for claim 1 or the welding cast iron pipe nickel alloy welding wire described in 2 or 3, is characterized in that: comprise following processing step:
(1) alloy melting: according to the mass percent batching of welding wire chemical composition, first drops into vaccum sensitive stove fusing by nickel block, pure iron raw material, then adds manganese sheet, monocrystalline silicon refining successively, after pour into alloy pig;
(2) hot forging: the heating furnace heat temperature raising described alloy pig being put into initial temperature≤600 DEG C, is warming up to 1050 DEG C-1150 DEG C, temperature retention time: 55min-75min, is forged into alloy preform after insulation terminates, is cooled to normal temperature in air;
(3) hot-roll annealing: the alloy preform described in step (2) is heated to 1000 DEG C-1100 DEG C and is rolled into the first silk material of dish, be cooled to room temperature in atmosphere;
(4) pickling, reconditioning: the pickling of first silk material will be coiled, then repair polishing;
(5) cold drawn: at room temperature by first for dish silk material progressively drawing-down be 4mm to silk material diameter;
(6) hydrogen moves back: the dish unit silk material hydrogen after cold drawn process is moved back process;
(7) draw: adopt continuous cold drawing process, by the silk material of diameter 4mm at continous way drawbench through 4-5 road drawing procedure, being drawn to diameter is 2.00mm-3.50mm;
(8) hydrogen moves back: after the dish unit silk material hydrogen after cold drawn process is moved back process, obtain welding cast iron pipe nickel alloy welding wire; The welding wire mechanical property of preparation is: yield strength 300-600Mpa, tensile strength 500-700Mpa, percentage elongation 10-40%, impact strength 50-75J.
(9) drum: step (8) hydrogen is moved back the welding wire after process and turns to plate-like.
5. the preparation method of welding cast iron pipe nickel alloy welding wire according to claim 4, is characterized in that: described step
(4) spent pickling acid is sulfuric acid or hydrochloric acid or phosphoric acid or nitric acid or hydrofluoric acid or acetic acid cleaning.
CN201510498204.7A 2015-08-13 2015-08-13 Nickel alloy welding wire for welding cast iron pipe Pending CN105108377A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108000003A (en) * 2017-12-04 2018-05-08 丹阳市盛亿润合金有限公司 A kind of preparation method of high-performance nickel-base alloy bare welding filler metal
CN110744223A (en) * 2019-10-21 2020-02-04 江苏兴海特钢有限公司 Preparation method of high-temperature alloy welding wire
CN111318834A (en) * 2020-03-26 2020-06-23 江苏博航合金科技有限公司 Nickel alloy welding wire for welding cast iron pipe and preparation method thereof
CN111496416A (en) * 2020-05-31 2020-08-07 胡胜洪 Nickel alloy welding wire for welding cast iron pipe and preparation method thereof

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108000003A (en) * 2017-12-04 2018-05-08 丹阳市盛亿润合金有限公司 A kind of preparation method of high-performance nickel-base alloy bare welding filler metal
CN110744223A (en) * 2019-10-21 2020-02-04 江苏兴海特钢有限公司 Preparation method of high-temperature alloy welding wire
CN110744223B (en) * 2019-10-21 2021-05-25 江苏兴海特钢有限公司 Preparation method of high-temperature alloy welding wire
CN111318834A (en) * 2020-03-26 2020-06-23 江苏博航合金科技有限公司 Nickel alloy welding wire for welding cast iron pipe and preparation method thereof
CN111496416A (en) * 2020-05-31 2020-08-07 胡胜洪 Nickel alloy welding wire for welding cast iron pipe and preparation method thereof

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