CN85106667B - Two-phase ultrahigh-strength aging stainless steel - Google Patents
Two-phase ultrahigh-strength aging stainless steel Download PDFInfo
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- CN85106667B CN85106667B CN85106667A CN85106667A CN85106667B CN 85106667 B CN85106667 B CN 85106667B CN 85106667 A CN85106667 A CN 85106667A CN 85106667 A CN85106667 A CN 85106667A CN 85106667 B CN85106667 B CN 85106667B
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- 230000032683 aging Effects 0.000 title claims abstract description 14
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 12
- 239000010935 stainless steel Substances 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 23
- 239000004615 ingredient Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 10
- 239000006104 solid solution Substances 0.000 abstract description 7
- 229910000734 martensite Inorganic materials 0.000 abstract description 6
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 6
- 230000006698 induction Effects 0.000 abstract description 3
- 235000019628 coolness Nutrition 0.000 description 9
- 229910001566 austenite Inorganic materials 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000007669 thermal treatment Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Natural products O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229940100630 metacresol Drugs 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The invention relates to a dual-phase ultrahigh-strength aging stainless steel, which is a Cr-Ni-Mo-Al martensite-ferrite type (about 50% of martensite and 50% of ferrite) aging stainless steel. After the steel is smelted by vacuum induction or vacuum plus electroslag, the steel is subjected to solid solution treatment at 820-1040 ℃ and aging treatment at 500-600 ℃, and the strength can reach 150 kg/mm2And has higher plasticity, excellent corrosion resistance and good dimensional stability. The invention also has the characteristics of simple process, good hot processing performance, easy mechanical processing and the like.
Description
The present invention is the superstrength aged stainless steel.Mainly be applicable to and require anti-various sensitive emulsion, barrier film, cuticula Cl, Br
-, NO
- 3, SO
- 4, CHS, SO
3Na, OH
-The corrosion of the etching reagent of forming Deng corrosive medium and anti-diazo resin, meta-cresol formaldehyde resin, resol and organic solvent ethylene glycol monoemethyl ether and require the good place of dimensional stabilizing, for example produce the extrusion coated mouth material in advanced person's the extrusion coated technology of sensitive materialss such as cinefilm, exograph, printing paper, and the PS version that adopts in the advanced lithographic printing etc.
PH15-7Mo steel (the AD274805 of U.S.'s development, the U.S. AD report in October, 1961) be the typical material that is used for the extrusion coated mouth in the world, its composition is C≤0.09,14.0～16.0% Cr, 6.5～7.75%Ni, 2.0～3.0%Mo, 0.75～1.25%Al, and optimal components is 0.07%C, 15%Cr, 5.0%Ni, 2.0%Mo, 1.0%Al.It is organized as austenite+martensite+20% delta ferrite, this steel is in the austenitic area in phasor, be commonly referred to as the semiaustenitic PH Stainless Steel, promptly PH15～7Mo emphasizes it is the semiaustenitic type.Its intensity can reach 150 kilograms/millimeter
2Its principal feature is: (1) thermal treatment process complexity, (2) its tissue, complete processing and performance are very sensitive to composition and temperature.As RH950 system commonly used, adopt 1060 ℃ of high temperature solid solutions to handle+955 ℃ of adjustment and handle+sub-zero treatment+510 ℃ timeliness when (73 ℃) are long.And above-mentioned processing requirement carries out continuously, especially adjust handle after, can not be in process of cooling or room temperature stop, otherwise will make the part stabilization of austenite.Stabilized austenite is handled by (73 ℃) can not finish martensitic transformation, and a condensate depression must be arranged; If after high temperature solid solution is handled, park some months and even several days, also can make hardness go back up to unmanageable degree.For this reason, require all thermal treatment and machining processes to finish continuously, otherwise can't process.This is the major defect that hinders this steel widespread use.Another shortcoming of this steel is quite responsive to composition.In order to obtain good formability, wish that steel keeps austenite in room temperature, so require the Ms point to be in about room temperature by the control composition.So-called control composition, wherein main is exactly carbon content.Though this steel regulation C≤0.09%, and working control has never seen the example of C＜0.05% 0.06～0.08%.Could under solid solution condition, obtain being easy to the austenite+20% delta ferrite tissue of forming process such as punching press like this.If carbon content then can not get above-mentioned weave construction not in above-mentioned scope.For example when C＜0.03%, Ms 〉=127.5 ℃, then steel has just presented stable martensitic stucture in room temperature, not only is difficult to machine-shaping, nor has been looks that PH15-7Mo is original.Another shortcoming of PH15-7Mo is exactly that dimensional stability is not good enough,＞0.15/1000 millimeter of its straight-line bending distortion.
The objective of the invention is to design a kind of intensity height, dimensional stability is good, technology is simple, corrosive superhigh strength stainless steels such as the various sensitive emulsions of ability, resin again.
For satisfying above-mentioned requirements, should consider C, Cr, Ni, the vital role of Mo element in steel.For obtain at room temperature have stable duplex structure (M+ φ) and good requirements such as solidity to corrosion, C must be less than 0.03%, in order to improve solidity to corrosion, particularly anti-spot corrosion and microstructure balance, should control Cr and be not less than 13%, Mo is not less than 3.1%, and Al is not less than 1.2%, and Ni is not less than 5.0%.Sulphur in Rare-Earth Ce and the steel, oxygen have stronger bonding force, play desulfating and deoxidation and purify steel, and the effect that suppresses high temperature grain growth and crystal grain thinning is arranged simultaneously, can improve solidity to corrosion, particularly oxidation-resistance can be improved the cutting ability of steel etc. simultaneously, and the control rare earth is not more than 0.06%.
For the above reasons, the present invention proposes a kind of novel martensite-ferrite superstrength aged stainless steel.Its concrete composition is C＜0.03%, 14.0～17.0%Cr, 5.0～7.0%Ni, 3.1～3.8%Mo, 1.2～1.5%Al, Ce≤0.06%.
Compare with the PH15-7Mo steel, the present invention is except other adds Ce, Mo content significantly improves, C content significantly descends, this species diversity of C, Mo content, making the present invention is the two-phase aged stainless steel of the structure (about 50% martensite+50% ferrite) of another kind of tissue morphology fully, promptly on weave construction is and the complete dissimilar steel grade of PH15-7Mo, also is to have neutralized that the high strength of Martensite Stainless Steel is low extends and the novel steel grade of the low strength of ferritic steel and very high extension property.Thereby have the good combination of high strength and high-ductility, and thermal treatment process is simple, and dimensional stability is good, easily corrosive good corrosion resistance such as mechanical workout and anti-various emulsions, resin.
The present invention adopts the smelting technology of vacuum induction or vacuum induction+electroslag, and hot-work can be adopted forging or rolling, and opening forging (or open rolling) temperature is 900～1200 ℃, and whole processing temperature is controlled at greater than 700 ℃.From tissue topography and mechanical property, the solid solubility temperature of this steel can be controlled in 820～1040 ℃ of scopes, and the type of cooling adopts air cooling.But improve quenching temperature and can cause that Ms descends, because of quenching temperature is high more, the supersaturation vacancy concentration is big more in the austenite, and they are remarkable more to interaction of dislocation, thereby have reduced the nucleogenesis of dislocation, and the Ms point is reduced; Consider the convenience of producing and using again, when often difference was little on performance, it is lower more suitable that solid solubility temperature is selected.After the solution treatment, carry out ageing treatment.Institution of prescription is: 500～600 ℃ of aging temps, soaking time 3 hours, type of cooling air cooling.
Because this duplex stainless steel under the solution treatment state, has high strength and high plasticity and toughness, good over-all properties such as easy cutting if be applied under the high strength, then need not to carry out other processing such as timeliness again.
Compare with the PH15-7Mo steel, the present invention has the characteristics of the simple and excellent performance (particularly dimensional stability and cutting ability) of technology.Table 1 has been enumerated two grade of steel thermal treatment process and property comparison.
Embodiment
The four stoves grades of steel of the present invention that adopted single vacuum and two kinds of smelting technology meltings of vacuum+electroslag.Its chemical ingredients such as table 2.Through ingot casting with after forging, carried out solution treatment and ageing treatment, two kinds of processing systems and corresponding performance are listed in table 3.
The performance comparison of table 1. the present invention and PH15-7Mo steel
| The contrast project | The PH15-7Mo steel | The present invention |
| Thermal treatment process | 1050 ℃ of solid solution+955 ℃ adjustment+(78 ℃) sub-zero treatment+510 ℃ ageing treatment | 820 ℃ of solid solution+520 ℃ ageing treatment |
| Mechanical property | δb≈150Kg／mm 2δ5＝8.5％Hv＝500 | δb≈150Kg／mm 2， δ5＝13.0％，ψ＝５０％，HBc＝16 |
| The machining program | Solution treatment → machining → solution treatment → thick machining → adjustment processing → sub-zero treatment → ageing treatment → precision work (necessarily carrying out continuously) | Roughing → ageing treatment → precision work |
| Dimensional stability | Straight-line bending distortion＞0.15/1000mm | Straight-line bending distortion＜0.005/1000mm |
| Solidity to corrosion | Anti-sensitive emulsion corrosion: occur the erosion point after 3 months | Anti-sensitive emulsion, resin corrosion have reached more than 3 years |
| Machinability | Because natural aging and heat treatment requirements continuity are arranged, it is very big that this steel hardness is gone up, as long as discontinuous processing just needs solid solution again, and could machining | Machinability is good, is easy to machining |
Table 2. is implemented chemical ingredients
| Heat (batch) number | Chemical ingredients | Remarks | ||||||
| C | Cr | Ni | Mo | Ai | Co | Fe | ||
| 1234 | 0.0080.0090.0020.027 | 14.015.014.514.0 | 6.06.06.15.9 | 3.503.553.403.53 | 1.201.201.211.19 | 0.040.05 | Yu Yu is surplus | The single vacuum metling vacuum of single vacuum metling+electroslag smelting vacuum+electroslag smelting |
Table 3. is implemented thermal treatment process and performance thereof
| Heat (batch) number | Heat treating regime | Mechanical property | |||
| δbKg/mm 2 | δ5% | ψ% | HRc | ||
| 1040 ℃ of 30 minutes air coolings | 115.0151.0153.0 | 11.512.616.0 | 64.057.553.5 | 36.046.0 | |
| 1 | 1040 ℃ of 30 minutes air cooling+520 ℃ 3 hours air coolings | ||||
| 820 ℃ of 30 minutes air cooling+540 ℃ 5 hours air coolings | |||||
| 2 | 1040 ℃ of 30 minutes air coolings | 114.9151.3 | 11.613.1 | 64.358.0 | 36.146.0 |
| 1040 ℃ of 30 minutes air cooling+520 ℃ 3 hours air coolings | |||||
| 3 | 820 ℃ of 30 minutes air coolings | 110.0150.0 | 12.012.5 | ≥50≥55 | 34.045.0 |
| 820 ℃ of 30 minutes air cooling+520 ℃ 3 hours air coolings | |||||
| 4 | 820 ℃ of 30 minutes air coolings | 110.8150.3 | 12.313.3 | 51.052.1 | 34.045.5 |
| 820 ℃ of 30 minutes air cooling+520 ℃ 3 hours air coolings | |||||
Claims (2)
1, a kind of superstrength two-phase aged stainless steel is characterized in that the chemical ingredients (weight %) of steel is: C＜0.03%, Cr14.0～17.0%, Ni5.0～7.0%, Mo3.1～3.8%, Al1.2～1.5%, Ce≤0.06%.
2, according to the heat treating method of desired superstrength two-phase aged stainless steel in the claim 1, it is characterized in that solution treatment: 820～1040 ℃ of temperature, air cooling is adopted in cooling; Ageing treatment: 500～600 ℃ of temperature, soaking time 3 hours, air cooling is adopted in cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106667A CN85106667B (en) | 1985-09-06 | 1985-09-06 | Two-phase ultrahigh-strength aging stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106667A CN85106667B (en) | 1985-09-06 | 1985-09-06 | Two-phase ultrahigh-strength aging stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85106667A CN85106667A (en) | 1986-10-22 |
| CN85106667B true CN85106667B (en) | 1986-10-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85106667A Expired CN85106667B (en) | 1985-09-06 | 1985-09-06 | Two-phase ultrahigh-strength aging stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85106667B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701555A (en) * | 2009-11-04 | 2010-05-05 | 上海齐耀动力技术有限公司 | Anti-fatigue corrosion-resisting body for hot air engine |
| CN103801646A (en) * | 2012-11-12 | 2014-05-21 | 中国南方航空工业(集团)有限公司 | 13cr15ni4mo3n material forging process |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330785C (en) * | 2005-12-27 | 2007-08-08 | 东北大学 | Strength of extension 1000 MPa grade complex phase steel plate and mfg. method thereof |
| CN100500922C (en) * | 2007-05-17 | 2009-06-17 | 钢铁研究总院 | Corrosion resistant structural steel with ultra high strength |
| US20180179612A1 (en) * | 2016-12-23 | 2018-06-28 | Posco | Duplex stainless steel sheet having excellent corrosion resistance and method for manufacturing the same |
-
1985
- 1985-09-06 CN CN85106667A patent/CN85106667B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701555A (en) * | 2009-11-04 | 2010-05-05 | 上海齐耀动力技术有限公司 | Anti-fatigue corrosion-resisting body for hot air engine |
| CN103801646A (en) * | 2012-11-12 | 2014-05-21 | 中国南方航空工业(集团)有限公司 | 13cr15ni4mo3n material forging process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85106667A (en) | 1986-10-22 |
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