CN1769002A - Homogeneous electric welding rod/flame welding wire for welding gray cast iron and ductile cast-iron - Google Patents

Homogeneous electric welding rod/flame welding wire for welding gray cast iron and ductile cast-iron Download PDF

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Publication number
CN1769002A
CN1769002A CN 200510096376 CN200510096376A CN1769002A CN 1769002 A CN1769002 A CN 1769002A CN 200510096376 CN200510096376 CN 200510096376 CN 200510096376 A CN200510096376 A CN 200510096376A CN 1769002 A CN1769002 A CN 1769002A
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welding
iron
cast
wire
cast iron
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CN100406191C (en
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翟秋亚
徐锦锋
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Xian University of Technology
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Xian University of Technology
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Abstract

The invention discloses a welding wire and welding rod core used in welding gray cast iron, which is formed by following weight proportion: C at 3.6%-4.0%, Si at 3.6%-4.6%, Mn at 0.2%-0.4%, S<0.05 %, P<0.1%, Ca<2%, Ni at 0.2%-1.2%, Ti at 0.3%-.8%, Al at 0.1%-0.5%, Bi at 0.03%-0.06%, Ba at 0.01%-0.03%, Ce at 0.01%-0.04% and RE at 0.01%-0.03% while the other is Fe. And the welding wire and welding rod core used in welding nodular graphite cast iron, which is formed by following weight proportion: C at 3.6%-4.2%, Si at 3.6%-4.6%, Mn at 0.2%-0.4%, S<0.03 %, P<0.06%, Ca<4%, Ni at 0.2%-2%, Ti at 0.3%-1.2%, Cu at 0.2%-0.8%, Al at 0.1%-0.5%, Bi at 0.01%-0.06%, Mg at 0.02%-0.03%, Ba at 0.01%-0.03%, Ce at 0.01%-0.04% and RE at 0.01%-0.03% while the other is Fe. The invention can realize the welding rod cooling welding or lower temperature welding, while the component, organization, property and color of welding line are the same as casting, with better process-ability and crack resistance.

Description

Homogeneity welding rod/the torch welding rods fabricated that is used for casting pig and Nodular Iron Welding
Technical field
The invention belongs to technical field of welding materials, particularly be suitable for the cast iron homogeneous welding rod and the torch welding rods fabricated of casting pig and Nodular Iron Welding.
Background technology
As extraordinary welding material, electrode for cast iron, welding wire are indispensable in engineering fields such as ironcasting welding and defect repair.Because impurity content height such as sulphur, phosphorus in the cast iron, intensity is low, plasticity is poor, its intrinsic coagulating property has determined cast iron in the REPAIR WELDING process, the soldering district is easy to generate spoken parts in traditional operas and crackle, especially under the cold welding condition, spoken parts in traditional operas and crackle tendency are bigger, have had a strong impact on the machining property and the serviceability of foundry goods.
Adopt the electrode for cast iron of the outer graphitization type coating of non-cast iron core to carry out the cast iron welding, for example Z208 (low-carbon steel core) welding rod, Z308 (pure nickel core) welding rod, Z408 (ferronickel core) welding rod etc., though spoken parts in traditional operas and crackle are reduced, but because composition of weld line, tissue and performance and color and luster and foundry goods do not match, crack resistance is poor, can't satisfy the combination property requirement of repairing as colour consistency, Performance Match etc.
Use and cast iron homogeneous welding material such as commercially available Z248, Z238 welding rod, adopting hot welding procedure is the effective measures that overcome above-mentioned defective, but the pre-heating mean complexity of hot welding, energy resource consumption is big, the production cycle is long, labour intensity is big, has increased the production cost of foundry goods undoubtedly.
Summary of the invention
In order to solve the aforementioned problems in the prior, the object of the present invention is to provide and be suitable for cast iron homogeneous welding rod/torch welding rods fabricated that casting pig and spheroidal graphite cast-iron arc cold-welding are used, when under room temperature or lower temperature, welding, can reduce spoken parts in traditional operas and crackle tendency effectively, and composition of weld line, tissue and color and luster and foundry goods basically identical.
First kind of technical scheme of the present invention, the homogeneity torch welding rods fabricated that is used for the casting pig welding, this welding wire is made up of following compositions in weight percentage: C 3.6%~4.0%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.05%, P<0.1%, Ca<2%, Ni 0.2%~1.2%, Ti 0.3%~0.8%, Al 0.1%~0.5%, Bi 0.03%~0.06%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
Second kind of technical scheme of the present invention, the homogeneity welding rod that is used for the casting pig welding, form by core wire and coating, core wire is made up of following compositions in weight percentage: C 3.6%~4.0%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.05%, P<0.1%, Ca<2%, Ni 0.2%~1.2%, Ti 0.3%~0.8%, Al 0.1%~0.5%, Bi 0.03%~0.06%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
The third technical scheme of the present invention, the homogeneity torch welding rods fabricated that is used for Nodular Iron Welding, this welding wire is made up of following compositions in weight percentage: C 3.6%~4.2%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.03%, P<0.06%, Ca<4%, Ni 0.2%~2%, Ti 0.3%~1.2%, Cu 0.2%~0.8%, Al 0.1%~0.5%, Bi 0.01%~0.06%, Mg 0.02%~0.03%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
The 4th kind of technical scheme of the present invention, the homogeneity welding rod that is used for Nodular Iron Welding, form by core wire and coating, core wire is made up of following compositions in weight percentage: C 3.6%~4.2%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.03%, P<0.06%, Ca<4%, Ni 0.2%~2%, Ti 0.3%~1.2%, Cu 0.2%~0.8%, Al 0.1%~0.5%, Bi 0.01%~0.06%, Mg 0.02%~0.03%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
In torch welding rods fabricated of the present invention and welding rod core wire composition, we are described below respectively the composition and the content qualification reason of each chemical element:
In order to make weld metal obtain casting pig and magnesium iron tissue, prevent that weld seam and fusion area from producing spoken parts in traditional operas, guarantee the machining property in welding (benefit) district, phosphorus content and silicon content are all higher in the core wire (silk), and addition is respectively: casting pig C 3.6%~4.0% (magnesium iron C 3.6%~4.2%), 3.6%~4.6%Si; For the mechanical performance of improving weld seam and promote graphitization, add a spot of Mn, Ni and Al; In order to purify weld metal, reduce the influence of objectionable impurities elements such as S, P, also added Ca, Mg and RE in the core wire, wherein Mg and RE add with the form of nodulizer; For crystal grain thinning, promotion graphite forming core and growth fast, micro-Bi, Ti, Ce and Ba have also been added.
The invention has the beneficial effects as follows:
(1) the transition rate of alloying element in deposited metal improves in the core wire (silk), and the weld seam graphitizability significantly strengthens;
(2) weld seam composition, tissue and color and luster are consistent with the ironcasting body;
(3) the weld seam cracking resistance, can process;
(4) realize homogeneous electrode cold welding or low-temperature welding, soldering, welding temperature is in room temperature~200 ℃ scope.
The specific embodiment
The present invention is described in detail below in conjunction with the specific embodiment.
The present invention is used for the homogeneity welding rod/torch welding rods fabricated of casting pig and spheroidal graphite cast-iron cold welding or eutectic welding, adopt the molten iron liquid of joining low impurity content of electric furnace, with alloying elements such as Ti, Bi, Ba, Ce core wire/welding wire being carried out polynary microalloying handles, after stokehold nodularization, inoculation, pour into spheroidal graphite cast-iron core wire or torch welding rods fabricated; Without the stokehold spheroidising, cast obtains casting pig core wire or torch welding rods fabricated.The casting pig torch welding rods fabricated, be made up of following compositions in weight percentage: C 3.6%~4.0%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.05%, P<0.1%, Ca<2%, Ni 0.2%~1.2%, Ti 0.3%~0.8%, Al 0.1%~0.5%, Bi 0.03%~0.06%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.The spheroidal graphite cast-iron torch welding rods fabricated, be made up of following compositions in weight percentage: C3.6%~4.2%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.03%, P<0.06%, Ca<4%, Ni 0.2%~2%, Ti 0.3%~1.2%, Cu 0.2%~0.8%, Al 0.1%~0.5%, Bi 0.01%~0.06%, Mg 0.02%~0.03%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.The casting pig core wire is made up of following compositions in weight percentage: C 3.6%~4.0%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.05%, P<0.1%, Ca<2%, Ni 0.2%~1.2%, Ti 0.3%~0.8%, Al 0.1%~0.5%, Bi 0.03%~0.06%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.Coated graphite chemical drug skin on the casting pig core wire that makes, coating recipe is by weight percentage: marble 20%~30%, potassic feldspar 10%~16%, squama graphite 5%~12%, mudstone China ink 6%~10%, 75 #Ferrosilicon 15%~25%, 30 #Calcium-silicon 3%~7%, aluminium powder 3%~7%, iron powder 3%~7%, white clay 10%~15%, sodium carbonate 0.8%~1.2%, drying is made the casting pig welding rod.The spheroidal graphite cast-iron core wire is made up of following compositions in weight percentage: C 3.6%~4.2%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.03%, P<0.06%, Ca<4%, Ni 0.2%~2%, Ti 0.3%~1.2%, Cu 0.2%~0.8%, Al 0.1%~0.5%, Bi 0.01%~0.06%, Mg 0.02%~0.03%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.Coated graphite chemical drug skin on the spheroidal graphite cast-iron core wire that makes, coating recipe is by weight percentage: dolomite 10%~20%, potassic feldspar 5%~15%, fluorite 5%~15%, marble 5%~11%, graphite 8%~16%, aluminium powder 4%~6%, 75 #Ferrosilicon 15%~25%, 30 #Calcium-silicon 6%~10%, white clay 5%~15%, RE-Y 1%~3%, iron powder 3%~7%, Na 2CO 31%~3%, drying is made nodular cast iron welding rod.
In following examples, utilize the welding condition of welding rod of the present invention/torch welding rods fabricated welding grey cast-iron and spheroidal graphite cast-iron as shown in table 1, the concrete chemical analysis of core wire/welding wire is as shown in table 2, the electrode coating ingradient proportioning is as shown in table 3, welding rod/torch welding rods fabricated deposited metal chemical analysis is as shown in table 4, the mechanical property of welding rod/torch welding rods fabricated deposited metal is as shown in table 5, sequence number 1-8 is the embodiment of the invention in each table, wherein, 1,2 is casting pig torch welding rods fabricated embodiment of the present invention, 3,4 is spheroidal graphite cast-iron torch welding rods fabricated embodiment of the present invention, 5,6 is casting pig welding rod embodiment of the present invention, 7,8 is nodular cast iron welding rod embodiment of the present invention.
The technological parameter of table 1 cast iron welding rod of the present invention/torch welding rods fabricated welding grey cast-iron and spheroidal graphite cast-iron
By the weldering trade mark of casting iron Core diameter (Φ/mm) Welding current (A) Weldingvoltage (V) Welding temperature (℃)
Casting pig HT250 5~8 200~350 20~40 Room temperature~200
Spheroidal graphite cast-iron QT450-10 5~8 200~350 20~40 Room temperature~200
The concrete chemical analysis contrast (weight %) of table 2 embodiment of the invention cast iron core wire/welding wire
The element sequence number C Si Mn S P Ca Ni Ti Al Bi Mg Cu Ba Ce Re Fe
1 3.6 4.6 0.4 0.01 0.06 0.8 0.2 0.3 0.5 .03 / / .01 .04 .01 Surplus
2 4.0 3.6 0.2 0.03 0.07 0.6 1.2 0.8 0.1 .06 / / .03 .01 .03 Surplus
3 4.2 3.6 0.4 0.02 0.05 0.8 2 0.3 0.5 .01 0.03 0.8 .03 .04 .03 Surplus
4 3.6 4.6 0.2 0.01 0.05 0.4 0.3 1.2 0.1 .06 0.02 0.2 .01 .01 .01 Surplus
5 4.0 3.6 0.4 0.02 0.01 0.1 1.2 0.8 0.1 .03 / / .03 .01 .03 Surplus
6 3.6 4.6 0.2 0.03 0.08 0.1 0.2 0.3 0.5 .06 / / .01 .04 .01 Surplus
7 3.6 3.6 0.4 0.01 0.05 0.2 1.8 0.3 0.5 .05 0.02 0.8 .03 .04 .02 Surplus
8 4.2 4.5 0.2 0.01 0.01 0.5 0.3 1.0 0.2 .01 0.03 0.3 .02 .02 .01 Surplus
The proportioning components (weight %) of table 3 embodiment of the invention cast iron chemical coating of welding electrode
The composition sequence number Marble Dolomite Potassic feldspar Fluorite Squama graphite The mudstone China ink Graphite 75 #Ferrosilicon 30 #Calcium-silicon Aluminium powder Iron powder White clay Sodium carbonate RE- Y
5 25 / 13 / 8 8 / 20 5 5 0 15 1 /
6 20 / 10 / 10 10 / 20 4 3 1 20 2 /
7 8 15 10 10 / / 12 20 8 5 5 10 2 2
8 8 10 12 8 / / 9 21 7 3 6 12 3 1
Table 4 embodiment of the invention cast iron welding rod/torch welding rods fabricated deposited metal chemical analysis (weight %)
The element sequence number C Si Mn S P Ca Ni Ti Al Bi Mg Cu Ba Ce Re Fe
1 3.5 4.5 0.4 0.01 0.06 0.6 0.2 0.3 0.5 .03 / / .01 .02 .01 Surplus
2 3.9 3.6 0.2 0.02 0.07 0.4 1.0 0.7 0.1 .04 / / .03 .01 .02 Surplus
3 4.0 3.5 0.3 0.01 0.05 0.8 1.8 0.3 0.5 .01 0.02 0.8 .02 .03 .01 Surplus
4 3.6 4.5 0.2 0.01 0.05 0.3 0.3 1.0 0.1 .05 0.02 0.2 .01 .01 .01 Surplus
5 3.8 3.6 0.4 0.02 0.01 0.1 1.0 0.7 0.1 .03 / / .02 .01 .03 Surplus
6 3.6 4.5 0.2 0.03 0.08 0.1 0.2 0.3 0.5 .04 / / .01 .03 .01 Surplus
7 3.6 3.6 0.3 0.01 0.05 0.1 1.8 0.3 0.4 .05 0.01 0.6 .03 .03 .02 Surplus
8 4.0 4.2 0.1 0.01 0.01 0.3 0.3 0.8 0.1 .01 0.01 0.3 .02 .02 .01 Surplus
The mechanical property (weight %) of table 5 embodiment of the invention cast iron welding rod/torch welding rods fabricated deposited metal
3 410 246 /
4 428 238 /
5 235 207 /
6 223 198 /
7 421 283 /
8 402 294 /
Cast iron homogeneous welding rod of the prior art adopts the outer graphitization type coating of low-carbon steel core to be prepared from mostly, improves the graphitizability of weld metal by coating transition alloy elements in weld seam.And the present invention directly will promote the alloying element of graphite forming core growth to join in the cast iron core wire by Physical Metallurgy, can increase substantially the transition rate of alloying element, and the weld seam graphitizability is strong; Cracking resistance, can process; Composition, tissue and color and luster and mother metal high conformity.The graphitization coating that is coated with outward is only as the alloying supplementary means.Therefore, the cast iron homogeneous welding rod of multicomponent microalloying (silk) is in the difference that has essence aspect composition design and the control with traditional electrode for cast iron.

Claims (4)

1. the homogeneity torch welding rods fabricated that is used for the casting pig welding, it is characterized in that, this welding wire is made up of following compositions in weight percentage: C 3.6%~4.0%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.05%, P<0.1%, Ca<2%, Ni 0.2%~1.2%, Ti 0.3%~0.8%, Al 0.1%~0.5%, Bi 0.03%~0.06%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
2. the homogeneity welding rod that is used for the casting pig welding, form by core wire and coating, it is characterized in that, described core wire is made up of following compositions in weight percentage: C 3.6%~4.0%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.05%, P<0.1%, Ca<2%, Ni 0.2%~1.2%, Ti 0.3%~0.8%, Al 0.1%~0.5%, Bi 0.03%~0.06%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
3. the homogeneity torch welding rods fabricated that is used for Nodular Iron Welding, it is characterized in that, this welding wire is made up of following compositions in weight percentage: C 3.6%~4.2%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.03%, P<0.06%, Ca<4%, Ni 0.2%~2%, Ti 0.3%~1.2%, Cu 0.2%~0.8%, Al 0.1%~0.5%, Bi 0.01%~0.06%, Mg 0.02%~0.03%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
4. the homogeneity welding rod that is used for Nodular Iron Welding, form by core wire and coating, it is characterized in that, described core wire is made up of following compositions in weight percentage: C 3.6%~4.2%, Si 3.6%~4.6%, Mn 0.2%~0.4%, S<0.03%, P<0.06%, Ca<4%, Ni 0.2%~2%, Ti 0.3%~1.2%, Cu 0.2%~0.8%, Al 0.1%~0.5%, Bi 0.01%~0.06%, Mg 0.02%~0.03%, Ba 0.01%~0.03%, Ce 0.01%~0.04% and RE 0.01%~0.03%, all the other are Fe.
CNB2005100963768A 2005-11-17 2005-11-17 Homogeneous electric welding rod/flame welding wire for welding gray cast iron and ductile cast-iron Expired - Fee Related CN100406191C (en)

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CN100453243C (en) * 2006-12-28 2009-01-21 山东建筑大学 Grey cast iron welding process and self-fluxing homogeneous welding powder
CN102528322A (en) * 2012-01-10 2012-07-04 西安理工大学 Graphitized alloy casting electric welding rod
CN103100802A (en) * 2013-01-31 2013-05-15 西安理工大学 Nickelic austenite ductile iron homogeneous welding electrode
CN103100803A (en) * 2013-01-31 2013-05-15 西安理工大学 Nickelic austenite ductile iron gas solder wire
CN103317251A (en) * 2013-05-31 2013-09-25 河北钢铁股份有限公司唐山分公司 Flux-cored welding wire for surfacing welding of base layer of gray cast iron
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CN102528322A (en) * 2012-01-10 2012-07-04 西安理工大学 Graphitized alloy casting electric welding rod
CN102528322B (en) * 2012-01-10 2013-09-04 西安理工大学 Graphitized alloy casting electric welding rod
CN103100802A (en) * 2013-01-31 2013-05-15 西安理工大学 Nickelic austenite ductile iron homogeneous welding electrode
CN103100803A (en) * 2013-01-31 2013-05-15 西安理工大学 Nickelic austenite ductile iron gas solder wire
CN103100802B (en) * 2013-01-31 2015-02-18 西安理工大学 Nickelic austenite ductile iron homogeneous welding electrode
CN103100803B (en) * 2013-01-31 2015-02-18 西安理工大学 Nickelic austenite ductile iron gas solder wire
CN103317251A (en) * 2013-05-31 2013-09-25 河北钢铁股份有限公司唐山分公司 Flux-cored welding wire for surfacing welding of base layer of gray cast iron
CN104439754A (en) * 2014-11-05 2015-03-25 安徽华众焊业有限公司 Environment-friendly and pollution-free aluminum product brazing wire and manufacturing process thereof
CN106098337A (en) * 2016-07-28 2016-11-09 无锡康柏斯机械科技有限公司 A kind of pen-type ignition coil of automobile soft magnet core
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CN108950370A (en) * 2018-07-26 2018-12-07 含山县兴达球墨铸铁厂 A kind of wear-resisting low temperature resistant spheroidal graphite cast-iron
CN109079288A (en) * 2018-09-17 2018-12-25 中国电建集团山东电力建设第工程有限公司 Castings of gray cast iron small imperfections repair welding
CN112475668A (en) * 2020-11-16 2021-03-12 中国第一汽车股份有限公司 Gas welding wire for cast iron repair welding and manufacturing process thereof
CN116079278A (en) * 2023-04-06 2023-05-09 中国科学院合肥物质科学研究院 High-energy-absorption high-manganese steel solid welding wire and welding process thereof
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