CN106862791A - For the welding material and preparation method of carbon steel and low alloy steel - Google Patents
For the welding material and preparation method of carbon steel and low alloy steel Download PDFInfo
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- CN106862791A CN106862791A CN201710200924.XA CN201710200924A CN106862791A CN 106862791 A CN106862791 A CN 106862791A CN 201710200924 A CN201710200924 A CN 201710200924A CN 106862791 A CN106862791 A CN 106862791A
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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
- B23K35/02—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
- B23K35/0283—Rods, electrodes, wires multi-cored; multiple
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
Abstract
The invention provides a kind of welding material and preparation method for carbon steel and low alloy steel, it is related to welding technology field, wherein for the welding material of carbon steel and low alloy steel, including core wire, core wire is integrally in circle strip；First steel wire component boxing wire mandrel direction is wrapped circumferentially around on the outer surface of core wire；Second steel wire component boxing wire mandrel direction is wrapped circumferentially around on the outer surface of the first steel wire component；Core wire, the first steel wire component and the second steel wire component from-inner-to-outer twist with the fingers stock shaping around the circumferential of core wire.A kind of welding material and preparation method for carbon steel and low alloy steel that the present invention is provided, core wire, the first steel wire component and the second steel wire component that welding material for carbon steel and low alloy steel therein is set gradually by from-inner-to-outer, and be molded by twisting with the fingers stock, the welding material of formation heat input in welding is low, welding deformation amount is small, good stability during wire feed, welding efficiency is high.
Description
Technical field
The present invention relates to technical field of welding materials, more particularly, to a kind of welding material for carbon steel and low alloy steel
And preparation method.
Background technology
Carbon steel and low alloy steel welding be respectively provided with welding efficiency it is high the characteristics of, but existing welding material is all single thick
Wire bonding silk, the larger welding parameter of this single thick wire welding wire needs could realize welding, and welding parameter necessarily results in greatly weldering
Heat input is connect big, so that welding deformation amount is just big.And another excessive shortcoming of heat input is exactly heat affected area width
Excessive, heat affected area width is excessive and can cause welding point that stress corrosion occurs in the presence of welding stress and corrosive medium
Or intercrystalline corrosion failure, so as to reduce the service life of equipment.
In addition, the physical characteristics of carbon steel and low alloy steel are all that thermal conductivity factor is low, thermal expansion amount is big, and in welding process
It is that metal in molten bath occurs thermal expansion first, is started to shrink at again in cooling procedure, and so may result in weld metal
Mother metal side produces very big heat affecting and certain shrinkage stress, and the more thick this shrinkage stress of sheet material is more obvious.Typically should
Power corrosion failure and intercrystalline corrosion failure major part are originated from since mother metal heat affected area, and then in dendritic extension.And
Heat affected area why be carbon steel and low alloy steel corrosion failure severely afflicated area, just because thermal weld stress amount it is excessive caused by
's.Because during Thermal Cycle, what the heat affected area grain size of any metal all can be different degrees of grows up, and sweating heat
Input quantity is bigger, and the width of mother metal heat affected area will be bigger, and the harm caused to equipment can also increase therewith.
And for the welding of single thick wire welding wire, welding efficiency is directly proportional to gage of wire, welding efficiency
Higher, gage of wire is thicker.But after gage of wire is thicker, thermal weld stress amount also must just increase, otherwise basic fusing
Not, with the increase of thermal weld stress amount, the illeffects to mother metal heat affected area also can accordingly increase.Therefore routinely skill
Art thinking, will expect very low thermal weld stress amount, it is necessary to reduce gage of wire, and reducing gage of wire will then cause weldering
Connect efficiency to substantially reduce, so as to the contradiction characteristic between it cannot be solved.
Therefore, heat input is all higher when existing carbon steel and low alloy steel welding material is welded, and can cause weld metal
Degraded toughness, welding deformation amount is big, the problems such as stress corrosion is sensitive, need to improve.
The content of the invention
It is therein it is an object of the invention to provide a kind of welding material and preparation method for carbon steel and low alloy steel
Core wire, the first steel wire component and the second steel wire set gradually by from-inner-to-outer for the welding material of carbon steel and low alloy steel
Component, and be molded by twisting with the fingers stock, the welding material of the formation heat input in welding is low, and welding deformation amount is small, stabilization during wire feed
Property is good, and welding efficiency is high, and its simple structure, and cost is relatively low, is easy to promote the use of on a large scale.
A kind of welding material for carbon steel and low alloy steel that the present invention is provided, including：
Core wire, the core wire is integrally in circle strip；
First steel wire component, the first steel wire component is wrapped circumferentially around in the outer of the core wire around the core wire axis direction
On surface, and the first steel wire component includes at least one steel wire；
Second steel wire component, the second steel wire component is wrapped circumferentially around in first steel wire around the core wire axis direction
On the outer surface of component, and the second steel wire component includes at least one steel wire；
Each steel in each steel wire and the second steel wire component in the core wire, the first steel wire component
Silk is the external diameter identical fine rule silk formed through wire drawing machine drawing, the core wire, the first steel wire component and second steel
Silk component from-inner-to-outer twists with the fingers stock shaping around the circumferential of the core wire.
Further, the first steel wire component includes 6 steel wires.
Further, the second steel wire component includes 12 steel wires.
Further, the external diameter of the welding material is 0.2~5.0mm.
Present invention also offers a kind of preparation method of the welding material for being used for carbon steel and low alloy steel as described above, bag
Include following steps：
Make fine rule silk：Slab selection carbon steel or low alloy steel disk round wires material, carbon steel or low alloy steel disk round wires material is led to
Crossing wire drawing machine carries out multiple drawing, and annealing heat-treats are carried out after the completion of drawing, obtains fine rule silk；
Copper plating treatment：Copper plating treatment is carried out to the fine rule silk after annealing；
Wrap up the first steel wire component：A fine rule silk is taken in fine rule silk from after copper plating treatment as core wire, from least
Fine rule filament winding core wire axis direction after a piece copper plating treatment is wrapped circumferentially around on the outer surface of core wire to form the first steel wire group
Part；
Wrap up the second steel wire component：It is wrapped circumferentially around from the fine rule filament winding core wire axis direction after at least one copper plating treatment
Forming the second steel wire component on the outer surface of the first steel wire component；
It is fabricated to the welding material for carbon steel and low alloy steel：The weldering that the from-inner-to-outer that will be obtained using strander is arranged
Core, the first steel wire component and the second steel wire component carry out sth. made by twisting stock around the circumferencial direction of core wire, and grease is removed after the completion of sth. made by twisting stock
High-temperature heat treatment, obtain the welding material for carbon steel and low alloy steel.
Further, during copper plating treatment, copper facing sequentially passes through unwrapping wire, alkali cleaning, washing, neutralization, acid before starting
The treatment washed, wash and activate.
Further, sequentially passed through during copper plating treatment, after the completion of copper facing washing, neutralization, hot water wash, drying,
Polishing and the treatment of take-up.
Further, when fine rule silk is made, fine rule silk carries out the temperature of annealing heat-treats using 600~1200 DEG C,
In heat treatment, filling protective gas in stove, the time of heat treatment is 2~8 minutes.
Further, when the welding material for carbon steel and low alloy steel is fabricated to, welding material is gone online
Except the temperature of the high-temperature heat treatment of grease uses 600~1200 DEG C, in heat treatment, filling protective gas in stove, heat treatment
Time is 2~8 minutes, and water-cooled is carried out after the completion of heat treatment.
Further, when the welding material for carbon steel and low alloy steel is fabricated to, filling in stove during heat treatment
Protective gas is at least one in nitrogen, argon gas or hydrogen.
A kind of welding material and preparation method for carbon steel and low alloy steel that the present invention is provided, it is therein for carbon steel
Core wire, the first steel wire component and the second steel wire component set gradually by from-inner-to-outer with the welding material of low-alloy steel, and
It is molded by twisting with the fingers stock, the welding material of the formation heat input in welding is low, and welding deformation amount is small, good stability during wire feed, weldering
Efficiency high, and its simple structure are connect, cost is relatively low, be easy to promote the use of on a large scale.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art, below will be to specific
The accompanying drawing to be used needed for implementation method or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the welding material for carbon steel and low alloy steel provided in an embodiment of the present invention；
Fig. 2 is the structural representation that core wire provided in an embodiment of the present invention and the second steel wire component coordinate.
Icon：1- core wires；2- the first steel wire components；3- the second steel wire components.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify describe, rather than indicate imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
A kind of welding material and preparation method for carbon steel and low alloy steel that the present invention is provided, it is therein for carbon steel
Core wire, the first steel wire component and the second steel wire component set gradually by from-inner-to-outer with the welding material of low-alloy steel, and
It is molded by twisting with the fingers stock, the welding material of the formation heat input in welding is low, and welding deformation amount is small, good stability during wire feed, weldering
Efficiency high, and its simple structure are connect, cost is relatively low, be easy to promote the use of on a large scale.
According to Fig. 1 to Fig. 2, a kind of welding material for carbon steel and low alloy steel that the present invention is provided, including：
Core wire 1, core wire 1 is overall in circle strip；
First steel wire component 2, the first steel wire component 2 is wrapped circumferentially around on the outer surface of core wire 1 around the axis direction of core wire 1,
And first steel wire component 2 include at least one steel wire；
Second steel wire component 3, the second steel wire component 3 is wrapped circumferentially around in the outer of the first steel wire component 2 around the axis direction of core wire 1
On surface, and the second steel wire component 3 includes at least one steel wire；
Each steel wire in each steel wire and the second steel wire component 3 in core wire 1, the first steel wire component 2 is through drawing
The external diameter identical fine rule silk that the drawing of silk machine is formed, core wire 1, the first steel wire component 2 and the from-inner-to-outer boxing of the second steel wire component 3
The circumferential of core twists with the fingers stock shaping.
In embodiments of the present invention, real core core wire is designed on central axis, is to ensure that welding material is overall in weldering
There is certain rigidity and stability, it is ensured that deposited metal is walked in welding process and stablized, beautiful appearance, quality in termination process
Reliable, core wire plays the firm effect of integrated support in center, and the first steel wire component, the second steel wire component and core wire company
Connect using stock making is twisted with the fingers, compact conformation is firm and is uniformly distributed.
The structure that the present invention twists with the fingers stock formation is fried dough twist braided structure, is able to meet carbon steel welding material or low-alloy
The welding of steel welding material is used.
First steel wire component includes 6 steel wires.Second steel wire component includes 12 steel wires.
In embodiments of the present invention, the outer surface of core wire is laid with 6 structures of steel wire, meanwhile, the first steel wire component
Outer surface be laid with 12 structures of steel wire, such structure design can either ensure the rigidity of welding wire, again can be effective
Prevent welding from being swung when melting, maintain the stability of wire feed, improve welding quality.
External diameter for the welding material of carbon steel and low alloy steel is 0.2~5.0mm.
In embodiments of the present invention, the external diameter for gas shielded arc welding welding material is 0.5~3.0mm, argon arc welding welding
Material can be welded with all of specification, the external diameter≤1.2mm of the welding material of cold welding.
Present invention also offers a kind of preparation method of the welding material for being used for carbon steel and low alloy steel as described above, bag
Include following steps：
Make fine rule silk：Slab selection carbon steel or low alloy steel disk round wires material, carbon steel or low alloy steel disk round wires material is led to
Crossing wire drawing machine carries out multiple drawing, and annealing heat-treats are carried out after the completion of drawing, obtains fine rule silk；
Copper plating treatment：Copper plating treatment is carried out to the fine rule silk after annealing；
Wrap up the first steel wire component：A fine rule silk is taken in fine rule silk from after copper plating treatment as core wire, from least
Fine rule filament winding core wire axis direction after a piece copper plating treatment is wrapped circumferentially around on the outer surface of core wire to form the first steel wire group
Part；
Wrap up the second steel wire component：It is wrapped circumferentially around from the fine rule filament winding core wire axis direction after at least one copper plating treatment
Forming the second steel wire component on the outer surface of the first steel wire component；
It is fabricated to the welding material for carbon steel and low alloy steel：The weldering that the from-inner-to-outer that will be obtained using strander is arranged
Core, the first steel wire component and the second steel wire component carry out sth. made by twisting stock around the circumferencial direction of core wire, and grease is removed after the completion of sth. made by twisting stock
High-temperature heat treatment, obtain the welding material for carbon steel and low alloy steel.
In embodiments of the present invention, from-inner-to-outer sets gradually core wire, the first steel wire component and the second steel wire component, then
Stock shaping is twisted with the fingers, the rigidity and feeding stability of welding material has not only been effectively ensured, it is ensured that overall speed of welding.
In embodiments of the present invention, when the welding material for carbon steel and low alloy steel is fabricated to, it is removed grease
The effect of high-temperature heat treatment be to be adsorbed by carbon steel or low-alloy steel disk round wires material in drawing and during twisting with the fingers stock
Lubricant grease burns, to ensure top layer and the first steel wire component and second steel wire of carbon steel or Developing Tendency of Low-Alloy Steel Welding Material finished product
Component the inside is all without any lubricant component, it is to avoid stomata and slag inclusion are produced during welding.
In embodiments of the present invention, when fine rule silk is made, carbon steel or low conjunction of the blank for using for 5~20mm of diameter
Golden steel disk round wires material, material selection ferrite carbon steel or low-alloy steel, ferrite+pearlite carbon steel or low-alloy steel, Austria
Family name's body carbon steel or low-alloy steel, ferrite+Austenite Carbon Steel or low-alloy steel, super austenitic carbon steel or low-alloy steel
And Ni-based carbon steel or low-alloy steel material.
During copper plating treatment, copper facing sequentially passes through unwrapping wire, alkali cleaning, washing, neutralization, pickling, washing and lives before starting
The treatment of change.
Washing, neutralization, hot water wash, drying, polishing and take-up are sequentially passed through during copper plating treatment, after the completion of copper facing
Treatment.
In embodiments of the present invention, various treatment are carried out successively before and after copper facing, it is ensured that copper facing effect and clean and tidy demand, after being
It is continuous to make fine rule silk, the first steel wire component and the second steel wire component, and stock process one environment without greasy dirt of offer is provided, it is to avoid
Cause oil pollution.
When fine rule silk is made, fine rule silk carries out the temperature of annealing heat-treats using 600~1200 DEG C, in heat treatment,
Filling protective gas in stove, the time of heat treatment is 2~8 minutes.
When the welding material for carbon steel and low alloy steel is fabricated to, welding material is removed the high temperature of grease online
The temperature of heat treatment uses 600~1200 DEG C, in heat treatment, filling protective gas in stove, and the time of heat treatment is 2~8 points
Clock, carries out water-cooled after the completion of heat treatment.
When the welding material for carbon steel and low alloy steel is fabricated to, the protective gas of filling is nitrogen in stove during heat treatment
At least one in gas, argon gas or hydrogen, it is also possible to select other gases.
A kind of preparation method of welding material for carbon steel and low alloy steel that the present invention is provided, by for carbon steel and
The welding material that the preparation method of the welding material of low-alloy steel makes, forms core wire, the first steel that from-inner-to-outer sets gradually
Silk component and the second steel wire modular construction, are then molded by twisting with the fingers stock, and such method makes the welding material to be formed in welding
When heat input it is low, welding deformation amount is small, and good stability during wire feed, welding efficiency is high.
The welding material and single welding wire welding effect for carbon steel and low alloy steel are carried out below by way of two embodiments
It is compared：
Embodiment one
Carbon steel or low alloy steel argon arc welding fillet welding
From welding parameter in table, for carbon steel and low alloy steel welding material welding current than single existing weldering
Silk is low by more than 25%, and speed of welding is high by 50%, half of the heat input no more than single existing welding wire.
Embodiment two
Carbon steel or low alloy steel mixed gas arc welding flat board is docked
From welding parameter in table, for carbon steel and low alloy steel welding material welding current than single existing weldering
Silk is low by more than 25%, and speed of welding is high by more than 50%, and heat input is also not as good as the half of single existing welding wire.
The welding material for carbon steel and low alloy steel that this programme is provided, because speed of welding is improved, thermal weld stress
Amount is reduced, and is particularly suitable for the butt welding of slab carbon steel or low alloy steel and the built-up welding of carbon steel (or chrome-molybdenum steel) or low-alloy steel
Welding, the welding material for carbon steel and low alloy steel of 0.2~5.0mm of diameter be adapted to manual argon arc welding, semi-automatic argon arc welding,
The welding of Semi-automatic gas shield welding；Because the coefficient of friction of the welding material outer surface for carbon steel and low alloy steel is high, wire feed essence
It is accurate non-slip, and with certain rigidity and stability, it is also particularly well-suited for the welding of robot.And the use provided in this programme
The welding equipment of various welding methods need not all be improved or changed in the welding material of carbon steel and low alloy steel, can be direct
Use, save equipment investment cost, protective gas used is a variety of mixed gas such as Ar or Ar+CO2 during welding,
With reliable welding quality, it is simple and practical the characteristics of；And the welding material for carbon steel and low alloy steel provided in this programme
Material and preparation method thereof, can also play pole to the welding of the visual plants such as related defence equipment, nuclear power, electric power and petrochemical equipment
Big science and technology support effect.
The welding material for carbon steel and low alloy steel that the present invention is used, burn-off rate is fast, it is not necessary to very big welding
Electric current, saves electric power energy consumption, and heat input is low, and the illeffects to mother metal heat affected area is small, and welding deformation amount is small, wire feed
When good stability, and welding efficiency is high, and quality is good, beautiful appearance.It is thick that the present invention changes single gage of wire, consumed
The larger problem of the energy, and also solve the human resources Cost Problems risen steadily with wage in short supply.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of welding material for carbon steel and low alloy steel, it is characterised in that including：
Core wire, the core wire is integrally in circle strip；
First steel wire component, the first steel wire component is wrapped circumferentially around in the outer surface of the core wire around the core wire axis direction
On, and the first steel wire component includes at least one steel wire；
Second steel wire component, the second steel wire component is wrapped circumferentially around in the first steel wire component around the core wire axis direction
Outer surface on, and the second steel wire component include at least one steel wire；
Each steel wire in each steel wire and the second steel wire component in the core wire, the first steel wire component be
The external diameter identical fine rule silk formed through wire drawing machine drawing, the core wire, the first steel wire component and the second steel wire group
Part from-inner-to-outer twists with the fingers stock shaping around the circumferential of the core wire.
2. the welding material for carbon steel and low alloy steel according to claim 1, it is characterised in that first steel wire
Component includes 6 steel wires.
3. the welding material for carbon steel and low alloy steel according to claim 1, it is characterised in that second steel wire
Component includes 12 steel wires.
4. the welding material for carbon steel and low alloy steel according to claim 1, it is characterised in that described for carbon steel
It is 0.2~5.0mm with the external diameter of the welding material of low-alloy steel.
5. the preparation method of the welding material for carbon steel and low alloy steel as described in claim any one of 1-4, its feature
It is to comprise the following steps：
Make fine rule silk：Slab selection carbon steel or low alloy steel disk round wires material, by carbon steel or low alloy steel disk round wires material by drawing
Silk machine carries out multiple drawing, and annealing heat-treats are carried out after the completion of drawing, obtains fine rule silk；
Copper plating treatment：Copper plating treatment is carried out to the fine rule silk after annealing；
Wrap up the first steel wire component：A fine rule silk is taken in fine rule silk from after copper plating treatment as core wire, from least one
Fine rule filament winding core wire axis direction after copper plating treatment is wrapped circumferentially around on the outer surface of core wire to form the first steel wire component；
Wrap up the second steel wire component：It is wrapped circumferentially around from the fine rule filament winding core wire axis direction after at least one copper plating treatment
Forming the second steel wire component on the outer surface of one steel wire component；
It is fabricated to the welding material for carbon steel and low alloy steel：The core wire of the from-inner-to-outer arrangement that will be obtained using strander,
First steel wire component and the second steel wire component carry out sth. made by twisting stock around the circumferencial direction of core wire, and the height of grease is removed after the completion of sth. made by twisting stock
Warm treatment, obtains the welding material for carbon steel and low alloy steel.
6. the preparation method of the welding material for carbon steel and low alloy steel according to claim 5, it is characterised in that
During copper plating treatment, copper facing sequentially passes through the treatment of unwrapping wire, alkali cleaning, washing, neutralization, pickling, washing and activation before starting.
7. the preparation method of the welding material for carbon steel and low alloy steel according to claim 5, it is characterised in that
The treatment of washing, neutralization, hot water wash, drying, polishing and take-up is sequentially passed through during copper plating treatment, after the completion of copper facing.
8. the preparation method of the welding material for carbon steel and low alloy steel according to claim 5, it is characterised in that
When making fine rule silk, fine rule silk carries out the temperature of annealing heat-treats using 600~1200 DEG C, and in heat treatment, filling is protected in stove
Shield gas, the time of heat treatment is 2~8 minutes.
9. the preparation method of the welding material for carbon steel and low alloy steel according to claim 5, it is characterised in that
When being fabricated to the welding material for carbon steel and low alloy steel, welding material is removed the temperature of the high-temperature heat treatment of grease online
Degree uses 600~1200 DEG C, in heat treatment, filling protective gas in stove, and the time of heat treatment is 2~8 minutes, has been heat-treated
It is cold into laggard water-filling.
10. the preparation method of the welding material for carbon steel and low alloy steel according to claim 5, it is characterised in that
When the welding material for carbon steel and low alloy steel is fabricated to, the protective gas of filling is nitrogen, argon gas in stove during heat treatment
Or at least one in hydrogen.
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| CN201710200924.XA CN106862791A (en) | 2017-03-30 | 2017-03-30 | For the welding material and preparation method of carbon steel and low alloy steel |
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| CN201710200924.XA CN106862791A (en) | 2017-03-30 | 2017-03-30 | For the welding material and preparation method of carbon steel and low alloy steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110576273A (en) * | 2019-09-10 | 2019-12-17 | 武汉市润之达石化设备有限公司 | Metal material, process and product for welding LNG (liquefied natural gas) ultralow-temperature stainless steel |
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