CN1204279C - Cheap Ni alloy resisting strong corrosion - Google Patents
Cheap Ni alloy resisting strong corrosion Download PDFInfo
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- CN1204279C CN1204279C CN 00105108 CN00105108A CN1204279C CN 1204279 C CN1204279 C CN 1204279C CN 00105108 CN00105108 CN 00105108 CN 00105108 A CN00105108 A CN 00105108A CN 1204279 C CN1204279 C CN 1204279C
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Abstract
The present invention relates to a strong corrosion-resistant nickel alloy, which belongs to a nickel-base alloy class. The strong corrosion-resistant nickel alloy uses nickel as a substrate . The strong corrosion-resistant nickel alloy is prepared from 49 to 52% of nickel, 22 to 26% of chromium, 15 to 19% of ferrum, 1.0 to 5.0% of niobium, no more than 0.02% of sulfur or phosphorus, no more than 0.5% of silicon and no more than 1.5% of manganese. The strong corrosion-resistant nickel alloy is characterized in that the strong corrosion-resistant nickel alloy contains 4.5 to 8.5% of molybdenum, 0.1 to 2.0% of nitrogen, 0.05 to 3.0% of rare earth and no more than 0.05% of carbon. The strong corrosion-resistant nickel alloy has the advantages that an annual corrosion rate is only from 0.2 to 1.5 millimeters in the environment of strong corrosion, the life of equipment is from 1 to 5 years, and material cost is reduced by 80%.
Description
Technical field:
The invention belongs to the nickel-base alloy class, be mainly used in equipment material in the media environment of being able to bear strong corrosion in oil, the chemical-process.
Background technology:
In oil, Chemical Manufacture, because the needs of production technique usually use some strong corrosive mediums, as boiling nitric acid class, sulfuric acid based, temperature is up to strong alkali aqueous solution of mixed solution, chloroazotic acid and all temps of 65 ℃ of nitric acid hydrofluoric acid or the like.In these environment, very high corrosion-resistant requirement has been proposed for the material of equipment.At present, material commonly used is Ultra-low carbon (≤a 0.02%) nickelalloy, high molybdenum (15-32%) nickelalloy, though these material corrosion resistance are preferable, but because ultralow carbon content and used a large amount of molybdenums, make its production technique comparatively complicated, because molybdenum is about 200 yuan of per kilograms, make the price comparison costliness of material simultaneously.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of Cheap Ni alloy resisting strong corrosion is provided.A kind of Ni-based low molybdenum alloy of being able to bear strong corrosion promptly is provided, and this alloy contains the molybdenum amount to be reduced greatly, and carbon containing is high slightly and production technique is comparatively simple, and price is more cheap.
Purpose of the present invention can be by realizing by the following technical solutions: a kind of Cheap Ni alloy resisting strong corrosion (following content all is weight percentage), matrix is a nickel, content is 49-52%, and have iron, the 1.0-5.0% of chromium, the 15-19% of 22-26% niobium ,≤0.02% sulphur or phosphorus ,≤0.5% silicon ,≤rare earth of 1.5% manganese, the molybdenum of 4.5-8.5%, 0.1-2.0% nitrogen, 0.05-3.0% ,≤0.06% carbon.
The rare earth that described Cheap Ni alloy resisting strong corrosion adds can be a mishmetal, also can be pure rare-earth metals cerium or lanthanum.
The smelting heat treatment process of Cheap Ni alloy resisting strong corrosion of the present invention is:
(1) refining mother alloy, vacuum induction furnace vacuum tightness is 1-2Pa, and argon filling 0.05MPa after the refining adds rare earth or nitrogen, and nitrogen can add with nitrogen Chrome metal powder or nitrogen manganese alloy, can pressurising power be the high pressure nitrogen of 0.1-0.8MPa also.
(2) mother alloy carries out vacuum melting, and vacuum tightness is 1-2Pa, and after the refining, argon filling 0.05MPa replenishes alloying element according to chemical analysis.
(3) ingot casting or product carry out homogenizing and handle, and in the 1100-1150 ℃ of stove that protective atmosphere arranged, are incubated 6-10 hour, back air cooling.
(4) carry out solution heat treatment after the homogenizing, in the 1050-1100 ℃ of stove with protective atmosphere,, in 10% salt solution, frozen water or ortho-water, be chilled to normal temperature then with every millimeter insulation of net thickness 2 minutes.
The invention has the beneficial effects as follows: 1. increase rare earth,, strengthen bonding force and protectiveness with matrix alloy in order to improve alloy surface protective membrane structure; Additional nitrogen with the chemical stability that increases protective membrane and with molybdenum associating resisting corrosion of chlorine ion, to form the protective membrane of rare earth, nitrogen and a large amount of chrome molybdenum composition; 3. carbon content high slightly (≤0.06%); 4. the present invention is in high strong corrosive environment, and a year corrosion only is the 0.2-1.5 millimeter, and be 1-5 equipment life, and material cost descends 80%.
Embodiment:
Alloying constituent proportioning of the present invention has following embodiment (each composition proportion is weight percentage):
Embodiment 1:
| Element | C | Cr | Fe | Mo | Nb | / |
| Content | ≤0.05 | 22-26 | 15-19 | 4.5-8.5 | 1.0-5.0 | / |
| Element | Si | Mn | S or P | Ce | N | Ni |
| Content | ≤0.5 | ≤1.5 | ≤0.02 | 0.05- 3.0 | 0.1-2.0 | Surplus |
Embodiment 2:
| Element | C | Cr | Fe | Mo | Nb | / |
| Content | ≤0.06 | 20-26 | 15-19 | 4.5-8.5 | 1-5 | / |
| Element | Si | Mn | S or P | N | Ce | Ni |
| Content | ≤0.5 | ≤1.5 | ≤0.02 | 0.1-2.0 | 0.05- 3.0 | Surplus |
Embodiment 3:
| Element | C | Cr | Fe | Mo | Nb | Si |
| Content | ≤0.06 | 22-26 | 15-19 | 4.5-8.5 | 1-5 | ≤0.5 |
| Element | Mn | S or P | N | Ce | Ni | |
| Content | ≤1.5 | ≤0.02 | 0.2-2.0 | 0.05-3 | Surplus |
The rare earth that the present invention adds can be a mishmetal, also can be pure rare-earth metals cerium or lanthanum.
The melting method that the present invention adopts is dual vacuum induction melting technology, and promptly the mother alloy of vacuum melting for the first time for the second time carries out vacuum remelting to mother alloy, to reach uniform purpose.Its main technique method is as follows:
1. master alloy melting, vacuum induction furnace vacuum tightness is 1-2Pa, and argon filling 0.05MPa after the refining adds rare earth or nitrogen, and nitrogen can add with nitrogen Chrome metal powder or nitrogen manganese alloy, can pressurising power be the high pressure nitrogen of 0.1-0.8MPa also.
2. mother alloy is carried out vacuum remelting, vacuum tightness is 1-2Pa, and argon filling 0.05MPa after the refining replenishes alloying element according to chemical analysis.
Thermal treatment process of the present invention is:
1. ingot casting or product are carried out homogenizing and handle, in the 1100-1150 ℃ of stove that protective atmosphere arranged, be incubated 6-10 hour, back air cooling.
2. carry out solution heat treatment after the homogenizing, in the 1050-1100 ℃ of stove with protective atmosphere,, in 10% salt solution, frozen water or ortho-water, be chilled to normal temperature then with every millimeter insulation of net thickness 2 minutes.
Claims (3)
1. Cheap Ni alloy resisting strong corrosion, it is characterized in that: following content all is weight percentage, matrix is a nickel, content is 49-52%, and have iron, the 1.0-5.0% of chromium, the 15-19% of 22-26% niobium ,≤0.02% sulphur or phosphorus ,≤0.5% silicon ,≤rare earth of 1.5% manganese, the molybdenum of 4.5-8.5%, 0.1-2.0% nitrogen, 0.05-3.0% ,≤0.06% carbon.
2. Cheap Ni alloy resisting strong corrosion as claimed in claim 1 is characterized in that the rare earth that adds, can be mishmetal, also can be pure rare-earth metals cerium or lanthanum.
3. the smelting heat treatment process of Cheap Ni alloy resisting strong corrosion as claimed in claim 1 is characterized in that:
1) master alloy melting, vacuum induction furnace vacuum tightness is 1-2Pa, and argon filling 0.05MPa after the refining adds rare earth or nitrogen, and nitrogen can add with nitrogen Chrome metal powder or nitrogen manganese alloy, can pressurising power be the high pressure nitrogen of 0.1-0.8Mpa also.
2) mother alloy is carried out vacuum melting, vacuum tightness is 1-2Pa, and after the refining, argon filling 0.05MPa replenishes alloying element according to chemical analysis.
3) ingot casting or product are carried out homogenizing and handle, in the 1100-1150 ℃ of stove that protective atmosphere arranged, be incubated 6-10 hour, back air cooling.
4) carry out solution heat treatment after the homogenizing, in the 1050-1100 ℃ of stove with protective atmosphere,, in 10% salt solution, frozen water or ortho-water, be chilled to normal temperature then with every millimeter insulation of net thickness 2 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105108 CN1204279C (en) | 2000-03-26 | 2000-03-26 | Cheap Ni alloy resisting strong corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105108 CN1204279C (en) | 2000-03-26 | 2000-03-26 | Cheap Ni alloy resisting strong corrosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1315585A CN1315585A (en) | 2001-10-03 |
| CN1204279C true CN1204279C (en) | 2005-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00105108 Expired - Fee Related CN1204279C (en) | 2000-03-26 | 2000-03-26 | Cheap Ni alloy resisting strong corrosion |
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| Country | Link |
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| CN (1) | CN1204279C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2749409C1 (en) * | 2020-09-25 | 2021-06-09 | Акционерное общество "Металлургический завод "Электросталь" | Method for smelting high-chromium nickel alloy of ep648-vi grade |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243243A (en) * | 2013-05-22 | 2013-08-14 | 江苏启迪合金有限公司 | Nickel-based anti-corrosion electric arc wire material |
| CN103484649A (en) * | 2013-09-18 | 2014-01-01 | 太原钢铁(集团)有限公司 | GH4700 alloy ingot homogenizing treatment method |
| CN104561727B (en) * | 2014-12-26 | 2018-05-11 | 江苏双勤新能源科技有限公司 | A kind of alloy material and its application for petrochemical industry stove tertiary-air pipe |
| CN104630595B (en) * | 2014-12-26 | 2018-06-01 | 江苏双勤新能源科技有限公司 | A kind of tertiary-air pipe for petrochemical industry stove |
| CN104635164B (en) * | 2015-01-26 | 2018-05-11 | 上海卓易科技股份有限公司 | The battery charging and discharging stability test method and intelligent terminal of a kind of intelligent terminal |
| EP3797180A1 (en) * | 2018-05-23 | 2021-03-31 | AB Sandvik Materials Technology | New austenitic alloy |
| CN110093520B (en) * | 2019-03-19 | 2021-04-30 | 江苏汉青特种合金有限公司 | Method for manufacturing corrosion-resistant alloy |
| EP4059636B1 (en) | 2021-03-19 | 2023-11-29 | RTX Corporation | Nickel alloy composition with boron and nitrogen |
-
2000
- 2000-03-26 CN CN 00105108 patent/CN1204279C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2749409C1 (en) * | 2020-09-25 | 2021-06-09 | Акционерное общество "Металлургический завод "Электросталь" | Method for smelting high-chromium nickel alloy of ep648-vi grade |
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| Publication number | Publication date |
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| CN1315585A (en) | 2001-10-03 |
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