CN109483085A - The fine-grained steel welding rod of acid corrosion-resistant - Google Patents
The fine-grained steel welding rod of acid corrosion-resistant Download PDFInfo
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- CN109483085A CN109483085A CN201811560052.9A CN201811560052A CN109483085A CN 109483085 A CN109483085 A CN 109483085A CN 201811560052 A CN201811560052 A CN 201811560052A CN 109483085 A CN109483085 A CN 109483085A
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- welding rod
- acid corrosion
- coating
- steel welding
- grained steel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
Abstract
The present invention provides a kind of acid corrosion-resistant fine-grained steel welding rods, including core wire and coating, the coating is made of dry powder and bonding agent, the dry powder contains the component of following mass percentage: marble: 40~47%, fluorite: 17~22%, quartz sand: 5~8%, rutile: 5~8%, 45# ferrosilicon: 5~8%, manganese metal: 2.0~3.5%, crome metal: 1.5~2.5%, copper powder: 1~1.5%, antimony powder: 0.1~0.3%, sodium alginate: 0.5~1%, reduced iron powder: 10.9~13.2%, the bonding agent is high mould potassium-sodium water glass.Acid corrosion-resistant fine-grained steel welding rod provided by the invention passes through coating alloying elements such as transition Si, Mn, Cr, Cu, Sb into weld metal, one layer of fine and close passivating film for being rich in chromium-copper antimony is formed in electrode surface, improves the mechanical performance and acid corrosion-resistant performance of welding rod.
Description
Technical field
The present invention relates to technical field of welding materials, in particular to a kind of acid corrosion-resistant fine-grained steel welding rod.
Background technique
09CrCuSb steel, also known as ND steel are that optimal " low-temperature dew point corrosion of resistance to sulfuric acid " uses steel, ND both at home and abroad at present
Steel is widely used in the devices such as manufacture economizer used in high sulfur-containing smoke gas, air preheater, heat exchanger and evaporator and sets
It is standby, for resist sulfur-containing smoke gas moisture condensation spot corrosion, in addition, ND steel also have anti-chlorine ion corrosion ability and high sexual valence
Than this makes ND steel that can substitute stainless steel completely, or even can also surmount stainless steel as most in terms of resistant to sulfuric acid dew point corrosion
Good resistant material meets " green " idea and the national development policy guidances such as current efficient, longevity, energy-saving and environmental protection.But
It is that, as the usage amount of ND steel increasingly increases, matched welding material but has problems.As performance is unstable, resistance to
It is unqualified etc. in terms of corrosion of sulfuric acid at dew point.
Summary of the invention
The present invention provides a kind of acid corrosion-resistant fine-grained steel welding rods, and its purpose is to solve welding rod matched with ND steel
The unqualified problem of mechanical performance, corrosion resistance.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of acid corrosion-resistant fine-grained steel welding rod, including core wire and coating, the coating are made of dry powder and bonding agent, institute
State the component that dry powder contains following mass percentage: marble: 40~47%, fluorite: 17~22%, quartz sand: 5~8%,
Rutile: 5~8%, 45# ferrosilicon: 5~8%, manganese metal: 2~2.5%, crome metal: 1.5~2.5%, copper powder: 1~1.5%,
Antimony powder: 0.1~0.3%, sodium alginate: 0.5~1%, reduced iron powder: 10.9~13.2%；The bonding agent is high mould potassium sodium
Waterglass.
Preferably, the coating quality accounts for the 28~30% of welding rod gross mass.
Preferably, the bonding agent quality is the 20~24% of dry powder quality.
Preferably, the modulus of the high mould potassium-sodium water glass is 3.0~3.2.
Preferably, the core wire contains the component of following mass percentage: C≤0.10%, Mn:0.35~0.60%,
Si≤0.03%, Cr≤0.20%, Ni≤0.30%, Cu≤0.20%, S≤0.030%, P≤0.035%, surplus Fe.
Marble main function is slag making, gas making, desulfurization, dephosphorization, improves slag basicity, increases slag surface tension and sticks
Degree, adjusts the fusing point of slag；When marble additional amount is less than 40%, the slag fusing point of formation is lower, and slag covering is not complete,
When additional amount is greater than 47%, the coating sleeve of formation is too deep, is easy blow-out, and molten iron viscosity increases and forms and be deteriorated.
Fluorite main function is slag making, dilutes slag and dehydrogenation effect, the surface tension of slag is adjusted, plays to molten bath
Activation；When the additional amount of fluorite is less than 17%, the diffusible hydrogen content of molten iron large viscosity, deposited metal is also higher, adds
When entering amount greater than 22%, slag trickling is serious, and electric arc is unstable.
Arc voltage can be improved as slag former in quartz sand, refines molten drop；When quartz sand additional amount is less than in the present invention
When 5%, appearance of weld is deteriorated, and when additional amount is greater than 8%, slag is shelly-shaped in glass, and it is difficult to take off slag.
Rutile main function is slag making, stabilising arc, the physical property for adjusting slag, improves appearance of weld；When rutile plus
When entering amount less than 5%, it is difficult to realize all-position welding, when additional amount is greater than 8%, acidic oxide easy to form is mingled with and makes
At weld seam oxygenation, weld metal mechanical property is influenced.
Crome metal, copper powder and antimony powder are used as alloying constituent, to the necessary alloying element of weld metal transition.
45# ferrosilicon can accelerate welding rod burn-off rate as deoxidier and alloying constituent, improve slag surface ability；When 45# silicon
When iron additional amount is lower than 5%, deoxidation is insufficient, and weld properties are low, and convexity is larger, and forming is deteriorated, and additional amount is greater than
When 8%, the silicon addition content in weld seam is higher, and weld metal intensity is caused to increase and plasticity, toughness decline.
Manganese metal can play the role of desulfurization as deoxidier and alloying constituent；Electrolytic manganese is added in coating to be less than
When 1.5%, the Mn content in weld metal is relatively low, easily forms coarse pro-eutectoid ferrite, poor mechanical property, and manganese metal is added
When amount is greater than 2%, the content of Mn element is higher in weld seam, increases weld metal intensity, and plasticity then decreases with toughness.
Sodium alginate is used for stabilising arc, improves welding rod extrusion performance, it is 0.5-1% that the present invention, which controls its content,.
Coating electric conductivity can be improved in reduced iron powder, improves arc stability.
Above scheme of the invention have it is following the utility model has the advantages that
(1) acid corrosion-resistant fine-grained steel covering of an electrode provided by the invention use low hydrogen potassium type slag system, by coating to
The alloying elements such as transition Si, Mn, Cr, Cu, Sb in weld metal improve electric conductivity, arc stability and the machinery of welding rod
Performance.
(2) acid corrosion-resistant fine-grained steel electrode surface provided by the invention forms one layer of fine and close passivation rich in chromium-copper antimony
Film improves acid corrosion-resistant performance.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with specific implementation
Example is described in detail.
Embodiment 1
Weigh the dry powder of following percentage: marble: 40%, fluorite: 22%, quartz sand: 8%, rutile: 6%, 45#
Ferrosilicon: 8%, manganese metal: 2%, crome metal: 1.5%, copper powder: 1%, antimony powder: 0.1%, sodium alginate: 0.5%, reduced iron powder:
10.9%, it is uniformly mixed.Increase mould potassium-sodium water glass thereto as binder, stirs evenly and obtain coating wet-milling.Wherein, it glues
Connect 20% that agent quality is dry powder quality.High mould modulus of water glass is 3.0.Coating wet-milling is coated in core wire using electrode extrusion press
It on H08A, dried, produce acid corrosion-resistant fine-grained steel welding rod after the drying of low temperature drying, high temperature.Wherein, core wire H08A,
Component containing following mass percentage: C≤0.10%, Mn:0.35~0.60%, Si≤0.03%, Cr≤0.20%, Ni
≤ 0.30%, Cu≤0.20%, S≤0.030%, P≤0.035%, surplus Fe.Coating quality accounts for welding rod gross mass
28%.
Embodiment 2
Weigh the dry powder of following percentage: marble: 44%, fluorite: 18.5%, quartz sand: 6%, rutile: 5%,
45# ferrosilicon: 6%, manganese metal: 2.25%, crome metal: 2.0%, copper powder: 1.3%, antimony powder: 0.2%, sodium alginate: 0.75%,
Reduced iron powder: 11%, it is uniformly mixed.Increase mould potassium-sodium water glass thereto as binder, stirs evenly and obtain coating wet-milling.
Wherein, bonding agent quality is the 22% of dry powder quality.High mould modulus of water glass is 3.1.Using electrode extrusion press by coating wet-milling
It is coated on core wire H08A, is dried, produces acid corrosion-resistant fine-grained steel welding rod after the drying of low temperature drying, high temperature.Wherein, core wire
H08A contains the component of following mass percentage: C≤0.10%, Mn:0.35~0.60%, Si≤0.03%, and Cr≤
0.20%, Ni≤0.30%, Cu≤0.20%, S≤0.030%, P≤0.035%, surplus Fe.It is total that coating quality accounts for welding rod
The 29% of quality.
Embodiment 3
Weigh the dry powder of following percentage: marble: 44%, fluorite: 17%, quartz sand: 5%, rutile: 8%, 45#
Ferrosilicon: 5%, manganese metal: 2.5%, crome metal: 2.5%, copper powder: 1.5%, antimony powder: 0.3%, sodium alginate: 1%, reduced iron
Powder: 13.2%, it is uniformly mixed.Increase mould potassium-sodium water glass thereto as binder, stirs evenly and obtain coating wet-milling.Its
In, bonding agent quality is the 24% of dry powder quality.High mould modulus of water glass is 3.2.Coating wet-milling is applied using electrode extrusion press
On core wire H08A, is dried, produces acid corrosion-resistant fine-grained steel welding rod after the drying of low temperature drying, high temperature.Wherein, core wire
H08A contains the component of following mass percentage: C≤0.10%, Mn:0.35~0.60%, Si≤0.03%, and Cr≤
0.20%, Ni≤0.30%, Cu≤0.20%, S≤0.030%, P≤0.035%, surplus Fe.It is total that coating quality accounts for welding rod
The 30% of quality.
Table 1: the coating mass percentage (%) of Examples 1 to 3
Using Examples 1 to 3 preparation acid corrosion-resistant fine-grained steel welding rod welding ND steel carry out deposited metal chemistry at
Part such as table 2, Mechanics Performance Testing, corrosion resistance test, the results are shown in Table 3.
Table 2: the acid corrosion-resistant fine-grained steel welding rod deposited metal chemical analysis (%) that Examples 1 to 3 is prepared
| C | Si | Mn | Cr | Cu | Sb | S | P | |
| Embodiment 1 | 0.058 | 0.38 | 0.61 | 0.83 | 0.31 | 0.05 | 0.008 | 0.017 |
| Embodiment 2 | 0.060 | 0.36 | 0.56 | 0.91 | 0.36 | 0.071 | 0.007 | 0.016 |
| Embodiment 3 | 0.063 | 0.31 | 0.47 | 1.05 | 0.43 | 0.09 | 0.008 | 0.016 |
Table 3: the acid corrosion-resistant fine-grained steel welding rod performance test that Examples 1 to 3 is prepared
By 1~3 result of table it is found that acid corrosion-resistant fine-grained steel covering of an electrode provided by the invention uses low hydorgew sodium type slag
System, by coating into weld metal the alloying elements such as transition Si, Mn, Cr, Cu, Sb, welding rod have preferable mechanical performance and
Corrosion resistance.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of acid corrosion-resistant fine-grained steel welding rod, including core wire and coating, which is characterized in that the coating by dry powder with it is Nian Jie
Agent composition, the dry powder contain the component of following mass percentage: marble: 40~47%, fluorite: and 17~22%, quartz
Sand: 5~8%, rutile: 5~8%, 45# ferrosilicon: 5~8%, manganese metal: 2.0~2.5%, crome metal: 1.5~2.5%, copper
Powder: 1~1.5%, antimony powder: 0.1~0.3%, sodium alginate: 0.5~1%, reduced iron powder: 10.9~13.2%；The bonding
Agent is high mould potassium-sodium water glass.
2. acid corrosion-resistant fine-grained steel welding rod as described in claim 1, which is characterized in that the coating quality accounts for welding rod gross mass
28~30%.
3. acid corrosion-resistant fine-grained steel welding rod as described in claim 1, which is characterized in that the bonding agent quality is dry powder quality
20~24%.
4. acid corrosion-resistant fine-grained steel welding rod as described in claim 1, which is characterized in that the modulus of the high mould potassium-sodium water glass
It is 3.0~3.2.
5. acid corrosion-resistant fine-grained steel welding rod as described in claim 1, which is characterized in that the core wire contains following quality percentage
The component of content: C≤0.10%, Mn:0.35~0.60%, Si≤0.03%, Cr≤0.20%, Ni≤0.30%, Cu≤
0.20%, S≤0.030%, P≤0.035%, surplus Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560052.9A CN109483085A (en) | 2018-12-20 | 2018-12-20 | The fine-grained steel welding rod of acid corrosion-resistant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560052.9A CN109483085A (en) | 2018-12-20 | 2018-12-20 | The fine-grained steel welding rod of acid corrosion-resistant |
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| Publication Number | Publication Date |
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| CN109483085A true CN109483085A (en) | 2019-03-19 |
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ID=65710919
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| CN201811560052.9A Pending CN109483085A (en) | 2018-12-20 | 2018-12-20 | The fine-grained steel welding rod of acid corrosion-resistant |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61129298A (en) * | 1984-11-27 | 1986-06-17 | Kobe Steel Ltd | Covered electrode |
| JP3930782B2 (en) * | 2002-08-30 | 2007-06-13 | 新日本製鐵株式会社 | Coated arc welding rod for welding low alloy steel with excellent sulfuric acid resistance and hydrochloric acid resistance |
| CN103934592A (en) * | 2014-04-18 | 2014-07-23 | 上海电力修造总厂有限公司 | Core wire and coating of 55-kilogram-level weather resistant steel welding rod, welding rod and preparing method |
| CN104907738A (en) * | 2015-05-25 | 2015-09-16 | 武汉铁锚焊接材料股份有限公司 | Special welding rod for sulfuric acid dew point corrosion-resistant steel |
| CN105436744A (en) * | 2016-01-04 | 2016-03-30 | 武汉铁锚焊接材料股份有限公司 | Welding rod for welding high-strength bridge steel Q500qE |
| CN105834614A (en) * | 2016-05-26 | 2016-08-10 | 武汉铁锚焊接材料股份有限公司 | Low alloy heat-resisting steel electrode containing vanadium |
| CN107931888A (en) * | 2017-11-27 | 2018-04-20 | 四川大西洋焊接材料股份有限公司 | Hydroelectric project high tensile steel electrode and preparation method thereof |
-
2018
- 2018-12-20 CN CN201811560052.9A patent/CN109483085A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61129298A (en) * | 1984-11-27 | 1986-06-17 | Kobe Steel Ltd | Covered electrode |
| JP3930782B2 (en) * | 2002-08-30 | 2007-06-13 | 新日本製鐵株式会社 | Coated arc welding rod for welding low alloy steel with excellent sulfuric acid resistance and hydrochloric acid resistance |
| CN103934592A (en) * | 2014-04-18 | 2014-07-23 | 上海电力修造总厂有限公司 | Core wire and coating of 55-kilogram-level weather resistant steel welding rod, welding rod and preparing method |
| CN104907738A (en) * | 2015-05-25 | 2015-09-16 | 武汉铁锚焊接材料股份有限公司 | Special welding rod for sulfuric acid dew point corrosion-resistant steel |
| CN105436744A (en) * | 2016-01-04 | 2016-03-30 | 武汉铁锚焊接材料股份有限公司 | Welding rod for welding high-strength bridge steel Q500qE |
| CN105834614A (en) * | 2016-05-26 | 2016-08-10 | 武汉铁锚焊接材料股份有限公司 | Low alloy heat-resisting steel electrode containing vanadium |
| CN107931888A (en) * | 2017-11-27 | 2018-04-20 | 四川大西洋焊接材料股份有限公司 | Hydroelectric project high tensile steel electrode and preparation method thereof |
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Application publication date: 20190319 |
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