CN1251837C - Soldering wire material containing nitrogen alloyed alloy core in form of hard surface - Google Patents
Soldering wire material containing nitrogen alloyed alloy core in form of hard surface Download PDFInfo
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- CN1251837C CN1251837C CN 200410013048 CN200410013048A CN1251837C CN 1251837 C CN1251837 C CN 1251837C CN 200410013048 CN200410013048 CN 200410013048 CN 200410013048 A CN200410013048 A CN 200410013048A CN 1251837 C CN1251837 C CN 1251837C
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Abstract
The present invention discloses a nitrogen alloyed welding wire for an alloy medicated core with a hard surface. Medicated core powder is formed by mixing alloy powder and mineral powder of the following components: 3 to 9%, of rutile, 13 to 18% of high-carbon ferrochromium, 42 to 53% of low-carbon ferrochromium, 3 to 6% of rare earth silicon, 0 to 5% of aluminum and magnesium alloy, 4 to 8% of metal manganese, 1 to 5% of molybdenum iron, 1 to 4% of vanadium iron, 2 to 5% of ferrotitanium, 2 to 5% of metal nickel, 2 to 6% of chromium nitride, and the surplus quantity is iron powder. The present invention can also comprise 2 to 5% of quartz and 3 to 6% of fluorite. The present invention uses nitrogen to replace parts of carbon for alloying, and enhances the performance of welding crack resistance of metal in a welding layer. The present invention has the advantages of high productive efficiency, low composite cost and good welding technological performance. The present invention can be used for visible arc automatic welding and submerged arc automatic welding, and is mainly used for rollers of steel metallurgical equipment, bead welding repair and composite manufacture of engineering machinery of mining machinery, large-scale excavators, etc., such as upper and lower pinch rollers, assistant winding rollers, descaling rollers, continuous casting rollers, working rollers, etc., of metallurgical equipment, guide wheels of large-scale excavators, etc.
Description
Technical field
The invention belongs to the solder wire material technical field, be specifically related to a kind of hard-face alloy flux-cored wire material of nitrogen alloying.
Background technology
Hard-face alloy flux-cored wire material is mainly used in the built-up welding reparation and the compound manufacturing of the engineering machinery such as roll, mining machinery and large excavator of Ferrous Metallurgy equipment.The hard-face alloy flux-cored wire material that is used for the built-up welding reparation at present generally adopts carbon to carry out alloying, and a large amount of carbide particles that distribute in matrix form the high-carbon hard facing alloy.This high-carbon hard-face alloy flux-cored wire material has following several respects obviously not enough:
1. carbon equivalent height, anti-weld crack poor performance.In order to obtain wear-corrosion resistance preferably, added alloying elements such as a large amount of C, Cr, Mo, V, this has greatly improved carbon equivalent, has reduced anti-weld crack performance.
2. plasticity is lower, easily peels off.The alligatoring of easily growing up of carbide in the high-carbon hard facing alloy material.This causes the distribution of carbides of hard facing alloy inhomogeneous, and plasticity is lower, easily peels off in the use.
3. high-temperature stability is not high, and corrosion resisting property is general.When the high-carbon hard facing alloy was on active service under the higher temperature operating mode, the carbon diffusion can take place in the carbide particle, caused carbide to decompose or the type transformation, reduction of service life.The pitting resistance of high-carbon hard facing alloy is not high yet.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, a kind of hard-face alloy flux-cored wire material of nitrogen alloying is provided, this solder wire material has that low, the anti-weld crack performance of carbon equivalent is good, plasticity is higher, incrust, have stable high-temperature performance and characteristics that corrosion resisting property is good.
The hard-face alloy flux-cored wire material of a kind of nitrogen alloying provided by the invention, medicine core powder is mixed by alloyed powder and mineral powder, the percentage by weight of each composition is: rutile 3～9%, high carbon ferro-chrome 13～18%, low-carbon ferrochromium 42～53%, rare earth silicon 3～6%, almag 0～5%, manganese metal 4～8%, containing the molybdenum amount is the molybdenum-iron 1～5% of 50-55%, vanadium content is the vanadium iron 1～4% of 20-25%, the titaniferous amount is the ferrotianium 2～5% of 20-25%, metallic nickel 2～5%, and nitrogen content is the chromium nitride 2～6% of 8-9%, surplus is an iron powder, and above ratio all is weight percentage.
Above-mentioned material also can comprise quartz and fluorite, and its percentage by weight is: quartz 2～5%, fluorite 3～6%.
The element that employing of the present invention and carbon have similarity carries out alloying, to guarantee the performance of hard facing alloy.The same interstitial solute atom that is of nitrogen with carbon, and can both form second particle mutually with alloying elements such as Ti, V, Cr.Carry out alloying with nitrogen instead of part carbon, form a kind of novel hard-face alloy flux-cored wire material of nitrogen alloying.The present invention has production efficiency height, low, the welding technological properties good characteristics of integrated cost.Be mainly used in the built-up welding reparation and the compound manufacturing of the engineering machinery such as roll, mining machinery and large excavator of Ferrous Metallurgy equipment.As the last bottom pinch roll of metallurgical equipment, help winding up roller, phosphorus removing roller, continuous casting roller and working roll etc., the directive wheel of large excavator etc.Particularly, the present invention has following characteristics:
1. the microscopic structure of overlay cladding is that martensite adds the small portion of residual austenite, distributing tiny carbide, nitride and carbonitride of disperse on martensite.Through 550 ℃ of left and right sides temper, the hardness of overlay cladding is 48～52HRC, and the surfacing hardness inhomogeneities is ± 1.5HRC.
2. carbon equivalent is not high, the bond strength height of overlay cladding, and anti-weld crack performance is good.And good abrasion resistance, antifatigue crackle and spalling resistance arranged.
3. the crystal grain of overlay cladding microscopic structure is tiny, the plasticity height, and high-temperature stability and corrosion resisting property are good.
4. be used for Ferrous Metallurgy equipment last bottom pinch roll, help the reparation of function rollers such as winding up roller, phosphorus removing roller, than using Cr-Mo-W-V alloy system welding wire traditionally, double service life.
The specific embodiment
The medicine core powder of the said solder wire material of the present invention is mixed by alloyed powder and mineral powder, with example it is described in further detail below.Following ratio all is weight percentage.
Example 1: rutile, 8%; Quartz, 4%; Fluorite, 6%; High carbon ferro-chrome, 17%; Low-carbon ferrochromium, 42%; Rare earth silicon, 3%; Contain the molybdenum amount and be 50% molybdenum-iron, 2%; Vanadium content is 25% vanadium iron, 1%; The titaniferous amount is 20% ferrotianium, 1%; Magnadure, 3%; Manganese metal, 5%; Nitrogen content is 8% chromium nitride, 4%; Metallic nickel, 4%.
Medicine core weight coefficient is 35～37%
Example 2: rutile, 3%; High carbon ferro-chrome, 14%; Low-carbon ferrochromium, 52%; Rare earth silicon, 3%; Contain the molybdenum amount and be 55% molybdenum-iron, 5%; Vanadium content is 20% vanadium iron, 4%; The titaniferous amount is 25% ferrotianium, 1%; Magnadure, 2%; Manganese metal, 5%; Nitrogen content is 8% chromium nitride, 6%; Metallic nickel, 5%.
Medicine core weight coefficient is 34～36%
Example 3: rutile, 6%; Quartz, 2%; Fluorite, 3%; High carbon ferro-chrome, 13%; Low-carbon ferrochromium, 53%; Rare earth silicon, 4%; Contain the molybdenum amount and be 55% molybdenum-iron, 4%; Vanadium content is 25% vanadium iron, 3%; The titaniferous amount is 20% ferrotianium, 2%; Manganese metal, 6%; Nitrogen content is 9% chromium nitride, 4%; Metallic nickel, 2%.
Medicine core weight coefficient is 33～35%.
Example 4: rutile, 3%; High carbon ferro-chrome, 14%; Low-carbon ferrochromium, 52%; Rare earth silicon, 3%; Contain the molybdenum amount and be 52% molybdenum-iron molybdenum-iron, 1%; Vanadium content is 22% vanadium iron, 3%; The titaniferous amount is 23% ferrotianium, 2%; Manganese metal, 6%; Nitrogen content is 8.5% chromium nitride, 4%; Metallic nickel, 2%.
Medicine core weight coefficient is 33～35%
Example 5: rutile, 4%; Quartz, 2%; Fluorite, 4%; High carbon ferro-chrome, 14%; Low-carbon ferrochromium, 46%; Rare earth silicon, 4%; Contain the molybdenum amount and be 50% molybdenum-iron, 4%; Vanadium content is 20% vanadium iron, 4%; The titaniferous amount is 25% ferrotianium, 2%; Magnadure, 1%; Manganese metal, 7%; Nitrogen content is 8% chromium nitride, 2%; Metallic nickel, 4%; Iron powder, 2%.
Medicine core weight coefficient is 33～35%
Example 6: rutile, 9%; Quartz, 5%; Fluorite, 3%; High carbon ferro-chrome, 14%; Low-carbon ferrochromium, 43%; Rare earth silicon, 3%; Contain the molybdenum amount and be 53% molybdenum-iron, 1%; Vanadium content is 20% vanadium iron, 3%; The titaniferous amount is 22% ferrotianium, 5%; Manganese metal, 8%; Nitrogen content is 9% chromium nitride, 2%; Metallic nickel, 3%; Iron powder, 1%.
Medicine core weight coefficient is 33～35%
Example 7: rutile, 7%; High carbon ferro-chrome, 18%; Low-carbon ferrochromium, 42%; Rare earth silicon, 6%; Contain the molybdenum amount and be 52% molybdenum-iron, 5%; Vanadium content is 25% vanadium iron, 2%; The titaniferous amount is 20% ferrotianium, 1%; Magnadure, 5%; Manganese metal, 4%; Nitrogen content is 8% chromium nitride, 3%; Metallic nickel, 2%; Iron powder, 5%.
Medicine core weight coefficient is 36～38%
In above-mentioned each example, the content of vanadium is 20-25% in the vanadium iron, and the content of titanium is 20-25% in the ferrotianium, and the content of nitrogen is 8-9% in the chromium nitride, and other each material is selected for use and got final product with alloyed powder, mineral powder rule according to the welding material regulation.
Iron powder mainly plays balanced action in the present invention, and making alloyed powder and mineral powder sum is 100%, and what do not change the performance of stiff dough flux-cored wire for it.
Stiff dough flux-cored wire of the present invention be used to repair the 1700mm hot-rolling mill on help the reparation result such as the following table of winding up roller.
Table 1: corrosion-resistant, the antifatigue crackle of overlay cladding, come off and peelability
| Time (moon) | Stiff dough flux-cored wire of the present invention | H25Cr3Mo2VA stiff dough welding wire | ||||||
| 6 | 9 | 12 | 15 | 6 | 7 | 8 | 9 | |
| Etch pit | Do not have | Do not have | Do not have | Do not have | Do not have | Pit | Etch pit | Etch pit |
| Fatigue crack | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Micro-crack | Crackle |
| Come off | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Have | Have |
| Peeling | Do not have | Do not have | Do not have | Do not have | Do not have | Have | Have | Have |
In addition, stiff dough flux-cored wire of the present invention is used to repair last phosphorus removing roller, the bottom pinch roll of 1700mm hot-rolling mill, no fatigue crack, come off, the peeling phenomenon occurs, erosion resistance is all right, than improving nearly 2 times the service life of H25Cr3Mo2VA stiff dough welding wire.
The novel hard-face alloy flux-cored wire material of the said a kind of nitrogen alloying of the present invention both can be used for open arc and weld automatically, and also being used for can Lincoln weld.
Example 1 is used for open arc and welds automatically, rutile (TiO at this moment
2), quartzy (SiO
2) and fluorite (CaF
2) the main formation slag that rises, the effect of protection surfacing layer metal.
Example 1 is used for Lincoln weld, at this moment selects for use commercially available HJ107 solder flux or HJ260 solder flux to be used.
The chemical composition of surfacing layer metal:
In order to guarantee the novel hard-face alloy flux-cored wire material of the said a kind of nitrogen alloying of the present invention, the microscopic structure that obtains overlay cladding is that martensite adds the small portion of residual austenite, distributing tiny carbide, nitride and carbonitride of disperse on martensite.Through 550 ℃ of left and right sides temper, the hardness of overlay cladding is 48～52HRC, and the surfacing hardness inhomogeneities is ± 1.5HRC.And carbon equivalent is not high, the bond strength height of overlay cladding, and anti-weld crack performance is good.And good abrasion resistance, antifatigue crackle and spalling resistance arranged.The chemical composition of surfacing layer metal is as follows:
Table 2: the chemical composition W of surfacing layer metal, %
| Carbon C | Silicon Si | Manganese Mn | Sulphur S | Phosphorus P | Chromium Cr | Molybdenum Mo | Nitrogen N |
| 0.15～0.25 | 0.3～0.7 | 0.7～1.25 | ≤0.03 | ≤0.03 | 11.5～14.5 | 0.3～0.9 | ≤0.15 |
Below provide a kind of preparation method of the present invention:
1). medicine core powder is mixed by alloyed powder and mineral powder, with alloyed powder and mineral powder stir repeatedly, homogenising, carry out flux-cored wire production, the formula rate of each alloyed powder and mineral powder is: rutile 3～9%; Quartzy 0～5%; Fluorite 0～6%; High carbon ferro-chrome 13～18%; Low-carbon ferrochromium 42～53%; Rare earth silicon 3～6%; Almag 0～5%; Manganese metal 1～26%; Molybdenum-iron 1～5%; Vanadium iron 1～4%; Ferrotianium 2～5%; Metallic nickel 2～5%; Chromium nitride 2～6%; Iron powder 0～20%.
2). the steel band of hard-face alloy flux-cored wire is carbon steel H80A.
3). the medicine core weight coefficient of hard-face alloy flux-cored wire is 32～38%.
4). the granularity of the alloyed powder of hard-face alloy flux-cored wire, mineral powder is 60～200 orders, and the mineral powder in the medicine core powder was through 550～600 ℃ of oven dry insulations 1～2 hour, and ferroalloy was through 50～80 ℃ of oven dry insulations 1～2 hour.
5). can be drawn into the different hard-face alloy flux-cored wire material of diameter, be 2.4mm as diameter, 2.8mm, 3.2mm, 4.0mm.
Claims (2)
1, a kind of hard-face alloy flux-cored wire material of nitrogen alloying, medicine core powder is mixed by alloyed powder and mineral powder, the percentage by weight of each composition is: rutile 3～9%, high carbon ferro-chrome 13～18%, low-carbon ferrochromium 42～53%, rare earth silicon 3～6%, almag 0～5%, manganese metal 4～8%, containing the molybdenum amount is the molybdenum-iron 1～5% of 50-55%, vanadium content is the vanadium iron 1～4% of 20-25%, the titaniferous amount is the ferrotianium 2～5% of 20-25%, metallic nickel 2～5%, nitrogen content are the chromium nitride 2～6% of 8-9%, and surplus is an iron powder.
2, solder wire material according to claim 1 is characterized in that: described material also comprises quartz and fluorite, and its percentage by weight is: quartz 2～5%, fluorite 3～6%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410013048 CN1251837C (en) | 2004-04-16 | 2004-04-16 | Soldering wire material containing nitrogen alloyed alloy core in form of hard surface |
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|---|---|---|---|
| CN 200410013048 CN1251837C (en) | 2004-04-16 | 2004-04-16 | Soldering wire material containing nitrogen alloyed alloy core in form of hard surface |
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| CN1562552A CN1562552A (en) | 2005-01-12 |
| CN1251837C true CN1251837C (en) | 2006-04-19 |
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Cited By (1)
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2004
- 2004-04-16 CN CN 200410013048 patent/CN1251837C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101406994B (en) * | 2007-10-10 | 2011-01-19 | 中冶集团建筑研究总院 | High-carbon high-chromium high-niobium cast iron self-protecting flux-cored wire |
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