CN1268777C - Iron based alloy powder prepared through jetting smelting - Google Patents
Iron based alloy powder prepared through jetting smelting Download PDFInfo
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- CN1268777C CN1268777C CN 200410040880 CN200410040880A CN1268777C CN 1268777 C CN1268777 C CN 1268777C CN 200410040880 CN200410040880 CN 200410040880 CN 200410040880 A CN200410040880 A CN 200410040880A CN 1268777 C CN1268777 C CN 1268777C
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Abstract
The present invention relates to iron based jetting smelting alloy powder for the manufacture and the repair of mechanical components. The present invention contains the following ingredients of 0.40 to 1.2% of C, 3.0 to 5.0% of Si, 3.0 to 4.5% of B, 14.0 to 20.0% of Cr, 20.0 to 36.0% of Ni, 0.5 to 1.8% of V, 0.5 to 4.0% of Al and Fe, impurities and other ingredients as the rest. At least one of the following elements can be preferably added according to weight percentage: 0.0 to 1.0% of Nb, 0.0 to 1.0% of Ti, 0.0 to 6.0% of W, 0.0 to 6.0% of Mo, and 0.0 to 4.0% of Cu. Compared with the existing iron based jetting smelting alloy powder, the present invention has the advantages that the wear resistance is enhanced by more than 20%, and the use range of the jetting smelting alloy powder is enlarged.
Description
Technical field
The present invention relates to a kind of iron-based spraying smelting alloy powder that is used for component of machine manufacturing and reparation.
Background technology
The iron-based spraying smelting alloy powder is mainly used in the workplace below 500 ℃, is applicable to the component that agricultural machinery, engineering machinery, mining machinery etc. are relevant and the product innovation manufacturing and the old product reparation of rail and mould etc.The main component of existing iron-based spraying smelting alloy powder is C, Si, Mn, Cr, Ni, and the solid solution strengthened alloy element mainly is Cr behind the spray fusing, and single-phase solid solution strengthening effect is not as heterogeneous good; Dispersion-strengthened mainly is the boride of Ni and Cr mutually, and the strengthening phase type is less, and especially high temperature abrasion resistance is not enough to cause wear resistance, and its range of application is restricted.
Summary of the invention
Technical problem underlying solved by the invention provides a kind of iron-based spraying smelting alloy powder with better wear resistance.
The technical solution adopted for the present invention to solve the technical problems is: iron-based spraying smelting alloy powder of the present invention contains by weight percentage: C:0.40～1.2%, Si:3.0～5.0%, B:3.0～4.5%, Cr:14.0～20.0%, Ni:20.0～36.0%, V:0.5～1.8% and Al:0.5～4.0%.
Or rather, iron-based spraying smelting alloy powder of the present invention is made up of following ingredients by weight percentage: C:0.40～1.2%, Si:3.0～5.0%, B:3.0～4.5%, Cr:14.0～20.0%, Ni:20.0～36.0%, V:0.5～1.8% and Al:0.5～4.0%, all the other are Fe, impurity and other composition.
Because V has stronger precipitation strength ability, but the crystal grain of the adding refinement alloy of Al, and Al is γ ' (Ni simultaneously
3Al) the main forming element of phase, in the intravital disperse distribution of base reinforced alloys, therefore iron-based spraying smelting alloy powder of the present invention has good wear resistance by γ '.
In technique scheme, the content of described impurity is by weight percentage: S≤0.03%, P≤0.03%, O≤0.12%.
Be the wear resistance that further improves the spray fusing alloy especially high temperature abrasion resistance, as improvement of the technical scheme, described other composition comprises a kind of in following by weight percentage at least: Nb:0.0～1.0%, Ti:0.0～1.0%, W:0.0～6.0%, Mo:0.0～6.0% and Cu:0.0～4.0%.
V, Ti, Nb have stronger crystal grain thinning ability, and two kinds and two or more element add and add fashionable effectively than a kind of separately, and Nb, Ti and Al are γ ' (Ni
3Al) the main forming element of phase, by γ ' in the intravital disperse distribution of base reinforced alloys.V, Nb, Ti, Mo, W are the strong carbide forming elements, and the high-temperature stability of these carbide is good, and Mo and W are strong solution strengthening elements, Cu makes alloy have good oxidation resistance, make the grain-size of spray fusing alloy little, the intensity height, high temperature abrasion resistance is good.
The spray fusing sample that spray fusing sample that the present invention makes and existing spray fusing alloy are made is being undertaken the mill test by GB12444.2-1990 " galling test method---ring piece type wearing test " standard respectively with a kind of metallic substance (as the Q345A material) below 500 ℃, and its mass loss reduces more than 20% than existing spray fusing alloy.
Iron-based spray fusing alloy of the present invention can adopt methods such as water atomization, aerosolization method, rotary water current atomization, rotating electrode atomization, mechanical crushing method to make the powdered alloy of desired particle size.
Embodiment
Embodiment 1:
Choose ferrosilicon, ferrochrome, vanadium iron, nickel, ferro-boron, aluminium powder etc., get material by a certain percentage, adopt common medium-frequency induction furnace to smelt, smelting the back alloying constituent is controlled at: C 0.40%, Si 3.0%, B 3.0%, Cr14.0%, Ni 20.0%, V 0.5%, Al 0.5%, S≤0.03%, P≤0.03%, O≤0.12%, the Fe surplus, below all be weight percentage, the percentage ratio sum is 100%.Adopt water atomization that this alloy is made the iron-based spraying smelting alloy powder that granularity is-150～+ 320 orders (two-step approach spray fusing) ,-320 orders (single stage method spray fusing) then, the alloy wear-resisting that its spray fusing goes out is better.
Water atomization is raw material to be heated to inject previously baked bottom pour ladle to about 600 ℃ more than the fusing point after 100～150 ℃ in smelting furnace, molten metal flows out from bottom pour ladle, smashed the back by the high pressure water of 3.5～10MPa and form powder, after collecting with powder aggregating device after filtration, the screening of dry back.Powder is sieved with 150 orders and 320 mesh sieves, and the screen overflow granularity of the screen underflow of 150 mesh sieve and 320 mesh sieve is-150～+ 320 orders, and the screen underflow granularity of 320 mesh sieve is-320 orders, thereby obtains the powder of desired particle size.
Embodiment 2:
Choose ferrosilicon, molybdenum-iron, ferrochrome, vanadium iron, nickel, ferro-boron, ferro-niobium, ferrotungsten, ferrotianium, aluminium, copper etc., get material by a certain percentage, adopt common medium-frequency induction furnace to smelt, smelting the back alloying constituent is controlled at: C 1.2%, Si 5.0%, B 4.5%, Cr 20.0%, Ni 36.0%, V 1.8%, Al 4.0%, Nb 1.0%, Ti 1.0%, W 6.0%, Mo 6.0%, Cu 4.0%, S≤0.03%, P≤0.03%, O≤0.12%, the Fe surplus, below all be weight percentage, the percentage ratio sum is 100%, adopting gas atomization that this alloy is made granularity then is-150～+ 320 orders (two-step approach spray fusings), the iron-based spraying smelting alloy powder of-320 orders (single stage method spray fusing), the alloy wear-resisting that its spray fusing goes out, high temperature abrasion resistance is good.
The aerosolization method is raw material to be heated to inject previously baked bottom pour ladle to about 600 ℃ more than the fusing point after 100～150 ℃ in smelting furnace, molten metal flows out from bottom pour ladle, utilize the high velocity air of 0.5～0.7MPa that metal liquid stream is smashed, again after powder aggregating device is collected after filtration, the screening of dry back.Powder is sieved with 150 orders and 320 mesh sieves, and the screen overflow granularity of the screen underflow of 150 mesh sieve and 320 mesh sieve is-150～+ 320 orders, and the screen underflow granularity of 320 mesh sieve is-320 orders, thereby obtains the powder of desired particle size.
Embodiment 3:
Choose ferrosilicon, molybdenum-iron, ferrochrome, vanadium iron, nickel, ferro-boron, ferro-niobium, ferrotungsten, ferrotianium, aluminium, copper etc., get material by a certain percentage, adopt common medium-frequency induction furnace to smelt, smelting the back alloying constituent is controlled at: C 1.1%, Si 4.0%, B 4.5%, Cr 18.0%, Ni 26.0%, V 1.0%, Al 3.0%, Nb 0.5%, Ti 0.4%, W 6.0%, Mo 5.0%, Cu 3.0%, S≤0.03%, P≤0.03%, O≤0.12%, the Fe surplus, below all be weight percentage, the percentage ratio sum is 100%, adopting the rotary water current atomization that this alloy is made granularity then is-150～+ 320 orders (two-step approach spray fusings), the iron-based spraying smelting alloy powder of-320 orders (single stage method spray fusing), the alloy wear-resisting that its spray fusing goes out, high temperature abrasion resistance is good.
The rotary water current atomization be with raw material in smelting furnace after the heat fused, pour being heated in the middle bottom pour ladle about 600 ℃ of inner lining refractory into, metal liquid stream is from the inflow spray chamber of leting slip a remark, and the current that sprayed by the high-revolving annular ejector from a plurality of holes smash the formation powder then.Powder spills from the spray chamber bottom, filters dry again after annealing or reduction through revolving filter, at last screening.Powder is sieved with 150 orders and 320 mesh sieves, and the screen overflow granularity of the screen underflow of 150 mesh sieve and 320 mesh sieve is-150～+ 320 orders, and the screen underflow granularity of 320 mesh sieve is-320 orders, thereby obtains the powder of desired particle size.
Embodiment 4:
Choose ferrosilicon, vanadium iron, ferrochrome, nickel, ferro-boron, aluminium etc., get material by a certain percentage, adopt common medium-frequency induction furnace to smelt, smelting the back alloying constituent is controlled at: C 1.10%, Si 3.5%, B 4.0%, Cr18.5%, Ni 32.0%, V 1.2%, Al 3.2%, S≤0.03%, P≤0.03%, O≤0.12%, the Fe surplus, below all be weight percentage, the percentage ratio sum is 100%, adopting water atomization that this alloy is made granularity then is-150～+ 320 orders (two-step approach spray fusings), the iron-based spraying smelting alloy powder of-320 orders (single stage method spray fusing), the alloy wear-resisting that its spray fusing goes out is good.
In the various embodiments described above, " single stage method spray fusing " is meant spraying and remelting hockets or the technology of the remelting while spraying; " two step method spray fusing " is meant the technology of the back remelting of dusting earlier.
The present invention compares with existing iron-based spraying smelting alloy powder, and wearability improves more than 20%, uses model Enclose expansion.
Claims (5)
1, a kind of iron-based spraying smelting alloy powder is characterized in that: described iron-based spraying smelting alloy powder contains by weight percentage:
C:0.40～1.2%, Si:3.0～5.0%, B:3.0～4.5%, Cr:14.0～20.0%, Ni:20.0～36.0%, V:0.5～1.8% and Al:0.5～4.0%.
2, iron-based spraying smelting alloy powder according to claim 1 is characterized in that: described iron-based spraying smelting alloy powder is made up of following ingredients by weight percentage:
C:0.40～1.2%, Si:3.0～5.0%, B:3.0～4.5%, Cr:14.0～20.0%, Ni:20.0～36.0%, V:0.5～1.8%, Al:0.5～4.0%, Nb:0.0～1.0%, Ti:0.0～1.0%, W:0.0～6.0%, Mo:0.0～6.0% and Cu:0.0～4.0%
All the other are Fe, impurity.
3, iron-based spraying smelting alloy powder according to claim 2, it is characterized in that: the content of described impurity is by weight percentage:
S≤0.03％、P≤0.03％、O≤0.12％。
4, according to claim 2 or 3 described iron-based spraying smelting alloy powders, it is characterized in that: the granularity of this iron-based spraying smelting alloy powder is-150～+ 320 orders.
5, according to claim 2 or 3 described iron-based spraying smelting alloy powders, it is characterized in that: the granularity of this iron-based spraying smelting alloy powder is-320 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410040880 CN1268777C (en) | 2004-10-21 | 2004-10-21 | Iron based alloy powder prepared through jetting smelting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410040880 CN1268777C (en) | 2004-10-21 | 2004-10-21 | Iron based alloy powder prepared through jetting smelting |
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| CN1600890A CN1600890A (en) | 2005-03-30 |
| CN1268777C true CN1268777C (en) | 2006-08-09 |
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| CN 200410040880 Expired - Fee Related CN1268777C (en) | 2004-10-21 | 2004-10-21 | Iron based alloy powder prepared through jetting smelting |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286702B (en) * | 2011-08-15 | 2016-06-01 | 奥美合金材料科技(北京)有限公司 | A kind of iron-based powder and part thereof |
| CN106270538B (en) * | 2015-05-28 | 2019-06-28 | 鞍钢股份有限公司 | A kind of preparation method of Ultra-fine Grained fe-based alloy powder |
| CN108690946B (en) * | 2018-06-15 | 2020-04-10 | 武汉科技大学 | Spray welding powder material and preparation method and application thereof |
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Assignee: Pangang Group Institute Co., Ltd. Assignor: Panzhihua Iron & Steel Research Institute of PanGang Group Contract fulfillment period: 2007.10.30 to 2012.10.30 contract change Contract record no.: 2009510000140 Denomination of invention: Iron based alloy powder prepared through jetting smelting Granted publication date: 20060809 License type: Exclusive license Record date: 2009.11.3 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.10.30 TO 2012.10.30; CHANGE OF CONTRACT Name of requester: PANGANG GROUP INSTITUTE CO., LTD. Effective date: 20091103 |
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