CN102605270A - Manufacturing method of super double-phase stainless steel impeller shaft - Google Patents
Manufacturing method of super double-phase stainless steel impeller shaft Download PDFInfo
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- CN102605270A CN102605270A CN2011104586174A CN201110458617A CN102605270A CN 102605270 A CN102605270 A CN 102605270A CN 2011104586174 A CN2011104586174 A CN 2011104586174A CN 201110458617 A CN201110458617 A CN 201110458617A CN 102605270 A CN102605270 A CN 102605270A
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- steel ingot
- impeller shaft
- stainless steel
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910001220 stainless steel Inorganic materials 0.000 title abstract description 3
- 239000010935 stainless steel Substances 0.000 title abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005242 forging Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000006104 solid solution Substances 0.000 claims abstract description 3
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000007670 refining Methods 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000007499 fusion processing Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005457 optimization Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 2
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- 239000011651 chromium Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
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Abstract
The invention relates to the field of metallurgy forging heat treatment, and in particular relates to a manufacturing method of a super double-phase stainless steel impeller shaft. The manufacturing method is characterized in that the manufacturing method comprises the following steps: preparing and smelting steel ingot with optimization formula, conducting ultra-purified smelting, cutting head and end, forging, carrying out solid solution heat treatment and carrying out shaping machining. The manufacturing method provided by the invention has the advantages of overcoming the deficiency of 316L and 2205 steel on usability, filling the domestic blank, being the pioneer in domestic, being simple and convenient in process and easy to control, ensuring physical and chemical properties of the products machined by optimization formula, being high in strength and strong in corrosion resistance, and the like.
Description
Technical field
The present invention relates to sinter forging thermal treatment field, be specifically related to a kind of super-duplex stainless steel impeller shaft method of manufacture.
Background technology
Existing austenitic stainless steel 316L (00Cr17Ni12Mo2) intensity is low, and intensity has only Rm500-520MPa, and 2205 (00Cr22Ni5Mo3N) two-phase stainless hardness of steel also has only 560-620MPa to satisfy not the requirement of impeller shaft intensity 750-895MPa.Have only super-duplex stainless steel, 00Cr25Ni7Mo3.7WCuN can attempt.China's duplex stainless steel is also at the early-stage, and duplex stainless steel processing is all very difficult, and the manufacturing of super-duplex stainless steel is just extremely difficult, and its resistance to corrosion also needs further to improve.
Summary of the invention
The objective of the invention is the weak point according to above-mentioned prior art, a kind of super-duplex stainless steel impeller shaft method of manufacture is provided, this method can guarantee its physicochemical property through the optimum combination of chemical ingredients, can further improve its erosion resistance again.
Realization of the present invention is accomplished by following technical scheme:
A kind of super-duplex stainless steel impeller shaft method of manufacture, it is characterized in that: said method of manufacture has following steps:
(a) preparation and the steel ingot of melting: C≤0.03, Mn≤1.00, Si≤1.00, Ni 6.00-8.00, Cr 24.00-26.00, Mo 3.00-4.00, W 0.5-1.0, N 0.2-0.3, Cu 0.5-1.0 with following mass percent; And S and P content are low as far as possible, and satisfy the requirement of S≤0.010, P≤0.030.
(b) steel ingot in the step (a) is carried out the ultra-pure purification melting, get rid of its non-interior metal inclusion and gas;
(c) steel ingot in the step (b) is excised end to end;
(d) steel ingot in the step (c) time being carried out cryogenic forging at forging temperature 980-1050 ℃, forging ratio＞4 passes through until forging;
(e) the said steel ingot that generates in the step (d) is carried out solution heat treatment being no more than under 1100 ℃ the situation;
(f) steel ingot in the step (e) is carried out the forming process of impeller shaft.
The concrete steps of step (b) are following: the steel ingot in the step (a) is put into arc melting; With its abundant oxidation, reduction; And repeatedly harrow slag non-metallic inclusion is got rid of totally, make its C≤0.030, afterwards steel ingot is used the vacuum refining furnace refining; Reduce the gas in the steel ingot, make its O≤20PPm, H≤2PPm.
Adopt the refining of EAF+VODC vacuum refining furnace in the fusion process of step (b).
The temperature of the solid solution of step (e) heat is controlled in 980-1050 ℃ the scope, and after solution heat treatment is accomplished, makes steel ingot reach R
m: 750-895MPa, Rp
0.2>=550MPa, A
5Both provisioning requests of>=25%.
Advantage of the present invention is: overcome prior art 316L, the deficiency of 2205 steel grades on use properties; Fill the domestic gaps, be domestic initiation, technology is simple and convenient easy to control; The product that produces through optimization of C can guarantee its physicochemical property, and has advantages such as HS, erosion resistance is strong.
Description of drawings
Fig. 1 is an optimization of C table of the present invention;
Fig. 2 is a Schaeffher graphic representation of the present invention;
Fig. 3 is a Delong graphic representation of the present invention.
Embodiment
Below through embodiment characteristic of the present invention and other correlated characteristic are done further explain so that technician's of the same trade understanding:
Embodiment: like Fig. 2, shown in 3, present embodiment Chemical Composition two-phase is than designing with reference to Schaeffher graphic representation and Delong graphic representation.
Calculate: nickel equivalent=%Ni+30%C+0.5%Mn+0.33%Cu+40%B
Chromium equivalent=%%Cr+5Mo+1.5%Si+0.5%Nb
The conventional two-phase of dual phase steel is 60%: 40% than the proportioning that is nickel equivalent γ and chromium equivalent α, or 40%: 60%.And through nickel equivalent, chromium equivalent measuring and calculating γ: α be 55%: 45% o'clock more satisfactory, it is 55%:45% that tap keeps γ: α, the steel-making time error is controlled at 2-3% and is advisable.
Through calculating each element optimization of C table (Wt%) as shown in Figure 1 that draws:
C≤0.03, Mn≤1.00, Si≤1.00, Ni 6.00-8.00, Cr 24.00-26.00, Mo 3.00-4.00, W 0.5-1.0, N 0.2-0.3, Cu 0.5-1.0, S≤0.010, P≤0.030; Wherein strengthening element C, Ni, Mo, W, N capping; Mn, Cr can get middle limit; P, S can take off limit, and be low as far as possible.The PRE (coefficient of anti-the pitting attack) of present embodiment in addition: %Cr+3.3%Mo+16%N >=40.
Present embodiment is realized through following method in the specific implementation:
The first step is according to above-described optimization of C melting steel ingot.
Second step, steel ingot is carried out the ultra-pure purification melting, because the higher 750-895Mpa of impeller shaft intensity has relatively high expectations, carry out the ultra-pure purification melting so need adopt an effective measure during melting.The starting material furnace charge cleans and the drying and reducing nonmetallic inclusionsin steel; The refining of domestic state-of-the-art EAF+VODC vacuum refining furnace is selected in melting; At first select arc melting for use; With abundant oxidation, reduction, repeatedly harrow slag non-metallic inclusion is got rid of totally, reduce gas in the steel ingot with the refining of VODC vacuum refining furnace again.The steel ingot of accomplishing the ultra-pure purification melting satisfies the technical requirements of C≤0.030, O≤20PPm, H≤2PPm.
In the 3rd step, steel ingot is excised end to end.
In the 4th step, the steel ingot after excision finished forges, and strict control steel ingot forges under 980-1050 ℃ of low temperature, and strengthens forging ratio this moment, forging ratio＞4 grade.Can not use high temperature forging in this step, be that nickel equivalent increases because high temperature forging is prone to make γ, and be irreversible reaction, thereby the steel ingot mechanical property is descended.
The 5th step, the steel ingot that forges is carried out solution heat treatment, steel ingot is heated to 980-1050 ℃, make its enough acquisition stablize the two-phase ratio, make its performance reach R
m: 750-895MPa, Rp
0.2>=550MPa, A
5>=25%.Because solution heat treatment also is to answer temperature rising γ to meet to increase, for the control two-phase than solid solubility temperature 1050-1150 ℃ low, so must be controlled at below 1100 ℃ than general stainless steel 304,316 solid solubility temperatures.
The 6th step, the steel ingot of accomplishing solution heat treatment is carried out forming process, make its dimensional structure all meet set technical requirements.
After making completion, the product of producing is carried out performance test.The product detected result meets inspection specifications and has good physicochemical property, use properties, and has the strong advantage of erosion resistance.The super-duplex stainless steel impeller shaft of present embodiment manufacturing fills the domestic gaps, and is domestic initiation.
Claims (4)
1. super-duplex stainless steel impeller shaft method of manufacture, it is characterized in that: said method of manufacture has following steps:
The steel ingot that preparation and melting have following mass percent: C≤0.03, Mn≤1.00, Si≤1.00, Ni 6.00-8.00, Cr 24.00-26.00, Mo 3.00-4.00, W 0.5-1.0, N 0.2-0.3, Cu 0.5-1.0; And S and P content are low as far as possible, and satisfy the requirement of S≤0.010, P≤0.030;
Steel ingot in the step (a) is carried out the ultra-pure purification melting, get rid of its non-interior metal inclusion and gas;
Steel ingot in the step (b) is excised end to end;
Steel ingot in the step (c) time is carried out cryogenic forging at forging temperature 980-1050 ℃, forging ratio＞4 to be passed through until forging;
The said steel ingot that generates in the step (d) is carried out solution heat treatment being no more than under 1100 ℃ the situation;
Steel ingot in the step (e) is carried out the forming process of impeller shaft.
2. a kind of super-duplex stainless steel impeller shaft method of manufacture according to claim 1; It is characterized in that: the concrete steps of step (b) are following: the steel ingot in the step (a) is put into arc melting, with its abundant oxidation, reduction, and repeatedly harrow slag and non-metallic inclusion is got rid of clean; Make its C≤0.030; Afterwards steel ingot is used the vacuum refining furnace refining, reduce the gas in the steel ingot, make its O≤20PPm, H≤2PPm.
3. a kind of super-duplex stainless steel impeller shaft method of manufacture according to claim 1 is characterized in that: adopt the refining of EAF+VODC vacuum refining furnace in the fusion process of step (b).
4. a kind of super-duplex stainless steel impeller shaft method of manufacture according to claim 1 is characterized in that: the temperature of the solid solution of step (e) heat is controlled in 980-1050 ℃ the scope, and after solution heat treatment is accomplished, makes steel ingot reach R
m: 750-895MPa, Rp
0.2>=550MPa, A
5Both provisioning requests of>=25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110458617 CN102605270B (en) | 2011-12-31 | 2011-12-31 | Manufacturing method of super double-phase stainless steel impeller shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110458617 CN102605270B (en) | 2011-12-31 | 2011-12-31 | Manufacturing method of super double-phase stainless steel impeller shaft |
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| CN102605270A true CN102605270A (en) | 2012-07-25 |
| CN102605270B CN102605270B (en) | 2013-09-18 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747308A (en) * | 2012-08-01 | 2012-10-24 | 上海加宁新技术研究所 | Method for producing high-strength non-magnetic stainless steel propeller shaft |
| CN103341583A (en) * | 2013-07-01 | 2013-10-09 | 江阴市恒业锻造有限公司 | Method for forging large-scale super duplex stainless steel tube sheet forging piece |
| CN106119732A (en) * | 2016-06-24 | 2016-11-16 | 张家港海锅重型锻件有限公司 | A kind of deep-sea oil extracting ship F60 two phase stainless steel pipe joint forging feedstock production process |
| CN107598171A (en) * | 2017-08-16 | 2018-01-19 | 北京科技大学 | A kind of desalinization conduit coupling high nitrogen biphase stainless steel near-net-shape method |
| CN108660373A (en) * | 2018-05-11 | 2018-10-16 | 上海申江锻造有限公司 | A kind of manufacturing method of high intensity austenitic stainless steel impeller axle |
| CN109898015A (en) * | 2019-02-01 | 2019-06-18 | 上海加宁新材料科技有限公司 | The manufacturing method of naval vessel seawater corrosion resistance HDR two phase stainless steel |
| CN111014544A (en) * | 2019-12-18 | 2020-04-17 | 张家港市亨通环形锻件制造有限公司 | Forging process of duplex stainless steel 2205 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638753A (en) * | 2009-08-26 | 2010-02-03 | 福州大学 | Solution treatment-free high-performance two-phase stainless cast steel and manufacture method thereof |
| CN102282273A (en) * | 2009-01-19 | 2011-12-14 | 住友金属工业株式会社 | Process for production of duplex stainless steel pipe |
-
2011
- 2011-12-31 CN CN 201110458617 patent/CN102605270B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282273A (en) * | 2009-01-19 | 2011-12-14 | 住友金属工业株式会社 | Process for production of duplex stainless steel pipe |
| CN101638753A (en) * | 2009-08-26 | 2010-02-03 | 福州大学 | Solution treatment-free high-performance two-phase stainless cast steel and manufacture method thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747308A (en) * | 2012-08-01 | 2012-10-24 | 上海加宁新技术研究所 | Method for producing high-strength non-magnetic stainless steel propeller shaft |
| CN102747308B (en) * | 2012-08-01 | 2014-08-27 | 上海加宁新技术研究所 | Method for producing high-strength non-magnetic stainless steel propeller shaft |
| CN103341583A (en) * | 2013-07-01 | 2013-10-09 | 江阴市恒业锻造有限公司 | Method for forging large-scale super duplex stainless steel tube sheet forging piece |
| CN103341583B (en) * | 2013-07-01 | 2015-09-16 | 江阴市恒业锻造有限公司 | The forging method of super two-phase stainless steel large-sized tube sheet forging |
| CN106119732A (en) * | 2016-06-24 | 2016-11-16 | 张家港海锅重型锻件有限公司 | A kind of deep-sea oil extracting ship F60 two phase stainless steel pipe joint forging feedstock production process |
| CN106119732B (en) * | 2016-06-24 | 2017-11-10 | 张家港海锅重型锻件有限公司 | A kind of deep-sea oil extracting ship F60 two phase stainless steels pipe joint forging feedstock production process |
| CN107598171A (en) * | 2017-08-16 | 2018-01-19 | 北京科技大学 | A kind of desalinization conduit coupling high nitrogen biphase stainless steel near-net-shape method |
| CN107598171B (en) * | 2017-08-16 | 2019-04-12 | 北京科技大学 | A kind of sea water desalination conduit coupling high nitrogen biphase stainless steel near-net-shape method |
| CN108660373A (en) * | 2018-05-11 | 2018-10-16 | 上海申江锻造有限公司 | A kind of manufacturing method of high intensity austenitic stainless steel impeller axle |
| CN109898015A (en) * | 2019-02-01 | 2019-06-18 | 上海加宁新材料科技有限公司 | The manufacturing method of naval vessel seawater corrosion resistance HDR two phase stainless steel |
| CN111014544A (en) * | 2019-12-18 | 2020-04-17 | 张家港市亨通环形锻件制造有限公司 | Forging process of duplex stainless steel 2205 |
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| CN102605270B (en) | 2013-09-18 |
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Inventor after: Dong Jinlei Inventor after: Zhang Tingchao Inventor after: Chen Jusheng Inventor before: Huang Jinlei Inventor before: Zhang Tingchao Inventor before: Chen Jusheng |
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Free format text: CORRECT: INVENTOR; FROM: HUANG JINLEI ZHANG TINGCHAO CHEN JUSHENG TO: DONG JINLEI ZHANG TINGCHAO CHEN JUSHENG |
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Effective date of registration: 20160412 Address after: 215104, 1, Suzhou Road, 7 North Guandu Road, Wuzhong District, Jiangsu Patentee after: Suzhou Machining Precision Electronics Co., Ltd. Address before: 200072 Shanghai, Zhabei District, Shanghai Road, room 502-508, No. 1059 Patentee before: Shanghai Jianing New Technology Research Institute |
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Address after: 215104 1 Guandu Road 7, Yuexi street, Wuzhong District, Suzhou, Jiangsu. Patentee after: Jiangsu Mai Lin aviation Polytron Technologies Inc Address before: 215104 1 Guandu Road 7, Yuexi street, Wuzhong District, Suzhou, Jiangsu. Patentee before: Suzhou Machining Precision Electronics Co., Ltd. |
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