CN105755397A - Method for processing corrosion-resistant easy-to-form special steel - Google Patents
Method for processing corrosion-resistant easy-to-form special steel Download PDFInfo
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- CN105755397A CN105755397A CN201610348716.XA CN201610348716A CN105755397A CN 105755397 A CN105755397 A CN 105755397A CN 201610348716 A CN201610348716 A CN 201610348716A CN 105755397 A CN105755397 A CN 105755397A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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Abstract
The invention discloses a method for processing corrosion-resistant easy-to-form special steel. The method comprises the following steps: preparing raw materials in percentage by weight, forging, carrying out heat treatment, then placing in a container full of water vapor, keeping for 2 to 4 hours at the temperature of 120 to 125 DEG C and at the pressure of 1.2 to 1.5 MPa, replacing the water vapor to air, and keeping for 2 to 4 hours at the temperature of 150 to 155 DEG C and at the pressure of 1.2 to 1.5 MPa to obtain the special steel. The special steel comprises the following components: 0.05 to 0.1% of carbon, 19 to 21% of chromium, 7 to 8% of nickel, 0.1 to 0.12% of copper, 0.4 to 0.5% of tungsten, 0.4 to 0.5% of magnesium, 0.1 to 0.12% of molybdenum and the balance of iron. According to the invention, alloy material categories are increased firstly, and the ratio is adjusted, so that a stainless steel product contains elements of nickel, chromium, copper, tungsten, magnesium, molybdenum and the like in a reasonable proportion, so that the steel is easy to process and form, and has certain shock absorption properties, and the corrosion resistance of the special steel is greatly increased, secondly, the steel is further subjected to subsequent surface processing after heat treatment is performed to solve the problem of high rusting probability.
Description
Technical field
The invention belongs to metallurgical technology field, the processing method being specifically related to a kind of special steel.
Background technology
In the industrial production, some metal parts in some chemical production equipment in use not only will through frayed, and the corrosion of resistance to nitric acid, cold phosphoric acid, organic acid and salt, aqueous slkali simultaneously is therefore comparatively harsh to the requirement of steel.
Along with the requirement of used steel plate low cost, high corrosion-resistant is improved by the industries such as automobile, household electrical appliances and building materials further, Ge great steel mill and research institution do not turn off and send novel coating steel plate with low cost, excellent performance.Zinc-aluminum-magnesium clad steel sheet obtains the attention of domestic and international Large Steel ironworks business and household electrical appliances, automaker at present with the corrosion resistance of its excellence, and the variety development of zinc-aluminum-magnesium clad steel sheet also reaches its maturity.At present, Korea S Pu item, nippon and American-European iron and steel corporation develop the products such as ZM, Z6A3M, Z10A3M successively.Patent CN101812653A, US6235410B1 etc. develop the Zn-based plating layer containing aluminum, magnesium, substantially increase corrosion resistance.
The case hardness of coating is one of important indicator of quality of coating and clad steel sheet result of use.Clad steel sheet unavoidable passing through in the later stage uses is transported, carries, is cut out and the process such as processing, and coating surface is often produced scuffing in various degree by these processes, the hardness of coating directly affects the scratch resistant ability of coating, namely coating hardness is more high, and the scratch resistance capability of coating is more strong..
But such surface treatment method can not improve the corrosion resisting property of steel completely, once surface is scratched, steel will be corroded.And such surface treatment not only makes process more complicated, and the manufacturing cost of production firm is made to promote.Therefore, if having better more suitably method can solve this problem, be worth research.
Summary of the invention
Goal of the invention: for weak point of the prior art, the processing method that the invention provides a kind of corrosion-resistant easy molding special steel.
Technical scheme: the processing method of corrosion-resistant easy molding special steel of the present invention is that proportioning raw materials is good, forge, heat treatment, it is placed in the container of full steam again, in 120～125 DEG C, keep 2～4 hours under 1.2～1.5MPa, again steam is replaced into air, in 150～155 DEG C, keep 2～4 hours under 1.2～1.5MPa after, obtain；Described proportioning raw materials according to mass percent is: carbon 0.05～0.1%, chromium 19～21%, nickel 4～8%, copper 0.1～0.12%, tungsten 0.4～0.5%, magnesium 0.4～0.5%, molybdenum 0.1～0.12%, and surplus is ferrum.
Above-mentioned heat treatment method, is that heat steel to 860～880 DEG C is incubated 1～2 hour, comes out of the stove after isothermal annealing and general annealing, then through twice preheating, temperature is increased to 1220～1280 DEG C and keeps 0.5～1 hour, then quenches, tempering, totally three tempering is carried out immediately after quenching.After preheating when temperature is increased to 1220～1280 DEG C, various steel alloys dissolubility in austenite also slowly increases, but, the time is slightly long, can cause grain growth, even there will be crystal boundary and dissolves, and therefore, the optimum time is 0.5 hour.
Described isothermal annealing is to be incubated 2 hours when being cooled to 720～750 DEG C；Then generally anneal, be cooled to less than 550 DEG C and come out of the stove.Hardness is 207～225HBW, is organized as sorbite+carbide.
Twice described preheating, first time preheating is to be warming up to 600～650 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 800～850 DEG C, keeps 2 hours.Such heating technique can avoid the deformation and the cracking that cause due to thermal stress.
Described hardening media is the mixture of white oil and sodium salt.Described sodium salt is sodium nitrate and sodium nitrite.Each composition in hardening media: white oil, sodium nitrate, sodium nitrite proportioning be 10:1:2.It is organized as martensite+carbide+retained austenite (25～30%) after quenching.
Described tempering carries out three times altogether, and quenched martensite is only played drawing effect by first time tempering, in tempering cooling procedure, the transformation of retained austenite occurs, produces new internal stress simultaneously.Through second time tempering, it does not have the retained austenite thoroughly changed continues new transformation, produces again new stress.This be accomplished by third time tempering, three tempering of the present invention be respectively as follows: first time be 560 DEG C 1 hour；550 DEG C 1.5 hours for the second time；560 DEG C 1 hour for the third time.The retained austenite of 1～3% is still retained after three tempering.Pass through said method, it is possible to eliminate quenching stress, reduce the Ovshinsky scale of construction, stabilizing tissue, reach performance requirement.
The invention also discloses the proportioning of this corrosion-resistant easy molding special steel, its composition according to percentage by weight is: containing carbon 0.05～0.1%, chromium 19～21%, nickel 7～8%, copper 0.1～0.12%, tungsten 0.4～0.5%, magnesium 0.4～0.5%, molybdenum 0.1～0.12%, all the other are ferrum.
Research find in common carbon steel, add chromium and can be effectively improved hardenability and the tempering resistance of steel, improve the intensity of steel, and chromium can also reduce the activity of carbon, improve the leaching carbon of steel, and forming fine carbide, it is possible to decrease steel surface decarburization and graphitization in heating, rolling and heat treatment process are inclined to, and improve toughness and mar proof；But, during chromium too high levels, forming the carbide of chromium on the contrary in a large number, the bullet worsening steel subtracts performance and toughness.Therefore, in the present invention, controlling the content of chromium in stainless steel is 19～21% (percentage by weights), and optimum content is 20%.
Meanwhile, add a small amount of nickel, be resistant to various acid corrosion and stress corrosion, and more tough and tensile, it being magnetic and good plasticity, welding performance might as well；Higher intensity and antioxidation, resistance to combustion gas corrosion ability is had under 650～1000 DEG C of high temperature.In the present invention, controlling the content of nickel in steel is 4%～8%, and optimum content is 7%.
Furthermore it has been found that the addition copper of trace, tungsten can improve the performance of steel atmospheric corrosion resistance.
In addition, add a small amount of magnesium and molybdenum, the crystal grain fine uniform more of steel can be made, easy machine-shaping, comparing to common iron, it possesses certain damping characteristic simultaneously, while possessing higher wearability and heat-resisting quantity, possesses certain damping performance, thus meeting some application demands that comfortableness, safety is higher.
One preferred version of the present invention is: described stainless steel composition by weight percent is: containing carbon 0.08%, chromium 20%, nickel 7%, copper 0.1%, tungsten 0.4%, magnesium 0.45%, molybdenum 0.11%, all the other are ferrum.
Further, we have found that if adding the niobium of trace in technique scheme, the corrosion resistance of steel can be further enhanced, research finds, reason is in that the present invention is when carrying out heat treatment, presents the tissue of austenite+carbide, the existence of carbide, the corrosion resistance of steel is had a significant impact, and austenite is lower heating at high temperature, owing to crystal boundary precipitates out the carbide Cr of chromium23C6So that the chrome content near crystal boundary reduces, and causes intercrystalline corrosion.Therefore, we add the niobium of trace wherein, are combined formation NbC with carbon so as to preferential, and its stability is high so that chromium retains in the base, it is to avoid the lean chromium of crystal boundary, thus alleviating firm grain boundary corrosion tendency.Additionally, NbC precipitates out in Dispersed precipitate at intracrystalline, and not easily grow up under high temperature, it is possible to improve the elevated temperature strength of the present invention.For the present invention, when the content of niobium is 0.3～0.8%, the most properly, it is preferable that 0.37%.
A present invention preferred version containing niobium is: described corrosion-resistant easy molding special steel, and its composition is by weight percentage: containing carbon 0.08%, chromium 20%, nickel 7%, copper 0.1%, tungsten 0.4%, magnesium 0.45%, molybdenum 0.11%, niobium 0.37%, all the other are ferrum.
Beneficial effect: production method of the present invention can effectively improve the decay resistance of steel, first alloy material classification is added, have adjusted the proportional components of various material element, make in rustless steel finished product containing elements such as the nickel of rational proportion, chromium, copper, tungsten, magnesium, molybdenums, easy machine-shaping, possess certain damping performance, be greatly increased the corrosion resistance of special steel material.Secondly, after steel heat processes, carried out again follow-up surface treatment, solved the problem easily got rusty.Additionally, the present invention has good mechanical property by what special heat treatment made steel.
Detailed description of the invention:
Embodiment 1
The each element proportioning of steel is: carbon 0.05%, chromium 19%, nickel 4%, copper 0.1%, tungsten 0.4%, magnesium 0.4%, molybdenum 0.1%, all the other are ferrum.After carrying out the forging of routine, heat steel to 860 DEG C is incubated 1 hour, is cooled to insulation 2 hours when 720 DEG C；Then generally annealing, be cooled to less than 550 DEG C and come out of the stove, then first time preheating is to be warming up to 600 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 800 DEG C, keeps 2 hours.Temperature is increased to 1220 DEG C and keeps 0.5 hour, then quench, hardening media is white oil and the mixture (white oil: sodium nitrate: nitrous acid mass ratio is 10:1:2) of sodium nitrate, sodium nitrite, carries out tempering after quenching immediately, first time tempering be 560 DEG C 1 hour；Second time tempering 550 DEG C 1.5 hours；Third time tempering 560 DEG C 1 hour, cold lacks to room temperature, then is placed in the container of full steam, in 120 DEG C, keep 2 hours under 1.2MPa, then steam is replaced into air, in 150 DEG C, keep 2 hours under 1.2MPa after, obtain.After testing, gained special steel hardness is 221HBW.
Embodiment 2
The each element proportioning of steel is: carbon 0.1%, chromium 21%, nickel 8%, copper 0.12%, tungsten 0.5%, magnesium 0.5%, molybdenum 0.12%, all the other are ferrum.After carrying out the forging of routine, heat steel is incubated 1 hour to 880 DEG C, is cooled to insulation 2 hours when 750 DEG C；Then generally annealing, be cooled to less than 550 DEG C and come out of the stove, then first time preheating is to be warming up to 650 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 850 DEG C, keeps 2 hours.Temperature is increased to 1280 DEG C and keeps 1 hour, then quench, hardening media is white oil and the mixture (white oil: sodium nitrate: nitrous acid mass ratio is 10:1:2) of sodium nitrate, sodium nitrite, carries out tempering after quenching immediately, first time tempering be 560 DEG C 1 hour；Second time tempering 550 DEG C 1.5 hours；Third time tempering 560 DEG C 1 hour.Cold lack to room temperature, then be placed in the container of full steam, in 125 DEG C, keep 4 hours under 1.5MPa, then steam is replaced into air, in 155 DEG C, keep 4 hours under 1.5MPa after, obtain.After testing, gained special steel hardness is 219HBW.
Embodiment 3
The each element proportioning of steel is: carbon 0.08%, chromium 20%, nickel 7%, copper 0.1%, tungsten 0.4%, magnesium 0.45%, molybdenum 0.11%, all the other are ferrum.After carrying out the forging of routine, heat steel is incubated 2 hours to 870 DEG C, is cooled to insulation 2 hours when 730 DEG C；Then generally annealing, be cooled to less than 550 DEG C and come out of the stove, then first time preheating is to be warming up to 620 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 820 DEG C, keeps 2 hours.Temperature is increased to 1250 DEG C and keeps 1 hour, then quench, hardening media is white oil and the mixture (white oil: sodium nitrate: nitrous acid mass ratio is 10:1:2) of sodium nitrate, sodium nitrite, carries out tempering after quenching immediately, first time tempering be 560 DEG C 1 hour；Second time tempering 550 DEG C 1.5 hours；Third time tempering 560 DEG C 1 hour.Cold lack to room temperature, then be placed in the container of full steam, in 120 DEG C, keep 3 hours under 1.4MPa, then steam is replaced into air, in 155 DEG C, keep 3 hours under 1.4MPa after, obtain.After testing, gained special steel hardness is 222HBW.
Embodiment 4
The each element proportioning of steel is: carbon 0.05%, chromium 19%, nickel 4%, copper 0.1%, tungsten 0.4%, magnesium 0.4%, molybdenum 0.1%, niobium 0.3%, all the other are ferrum.After carrying out the forging of routine, heat steel to 860 DEG C is incubated 1 hour, is cooled to insulation 2 hours when 720 DEG C；Then generally annealing, be cooled to less than 550 DEG C and come out of the stove, then first time preheating is to be warming up to 600 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 800 DEG C, keeps 2 hours.Temperature is increased to 1220 DEG C and keeps 0.5 hour, then quench, hardening media is white oil and the mixture (white oil: sodium nitrate: nitrous acid mass ratio is 10:1:2) of sodium nitrate, sodium nitrite, carries out tempering after quenching immediately, first time tempering be 560 DEG C 1 hour；Second time tempering 550 DEG C 1.5 hours；Third time tempering 560 DEG C 1 hour, cold lacks to room temperature, then is placed in the container of full steam, in 120 DEG C, keep 2 hours under 1.2MPa, then steam is replaced into air, in 150 DEG C, keep 2 hours under 1.2MPa after, obtain.After testing, gained special steel hardness is 225HBW.
Embodiment 5
The each element proportioning of steel is: carbon 0.1%, chromium 21%, nickel 8%, copper 0.12%, tungsten 0.5%, magnesium 0.5%, molybdenum 0.12%, niobium 0.8%, all the other are ferrum.After carrying out the forging of routine, heat steel is incubated 1 hour to 880 DEG C, is cooled to insulation 2 hours when 750 DEG C；Then generally annealing, be cooled to less than 550 DEG C and come out of the stove, then first time preheating is to be warming up to 650 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 850 DEG C, keeps 2 hours.Temperature is increased to 1280 DEG C and keeps 1 hour, then quench, hardening media is white oil and the mixture (white oil: sodium nitrate: nitrous acid mass ratio is 10:1:2) of sodium nitrate, sodium nitrite, carries out tempering after quenching immediately, first time tempering be 560 DEG C 1 hour；Second time tempering 550 DEG C 1.5 hours；Third time tempering 560 DEG C 1 hour.Cold lack to room temperature, then be placed in the container of full steam, in 125 DEG C, keep 4 hours under 1.5MPa, then steam is replaced into air, in 155 DEG C, keep 4 hours under 1.5MPa after, obtain.After testing, gained special steel hardness is 227HBW.
Embodiment 6
The each element proportioning of steel is: carbon 0.08%, chromium 20%, nickel 7%, copper 0.1%, tungsten 0.4%, magnesium 0.45%, molybdenum 0.11%, niobium 0.37%, all the other are ferrum.After carrying out the forging of routine, heat steel is incubated 2 hours to 870 DEG C, is cooled to insulation 2 hours when 730 DEG C；Then generally annealing, be cooled to less than 550 DEG C and come out of the stove, then first time preheating is to be warming up to 620 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 820 DEG C, keeps 2 hours.Temperature is increased to 1250 DEG C and keeps 1 hour, then quench, hardening media is white oil and the mixture (white oil: sodium nitrate: nitrous acid mass ratio is 10:1:2) of sodium nitrate, sodium nitrite, carries out tempering after quenching immediately, first time tempering be 560 DEG C 1 hour；Second time tempering 550 DEG C 1.5 hours；Third time tempering 560 DEG C 1 hour.Cold lack to room temperature, then be placed in the container of full steam, in 120 DEG C, keep 3 hours under 1.4MPa, then steam is replaced into air, in 155 DEG C, keep 3 hours under 1.4MPa after, obtain.After testing, gained special steel hardness is 229HBW.
Embodiment 7
Above-mentioned obtained steel are carried out corrosion-resistant test, is dipped in water, acetic acid, ammonia, concentrated sulphuric acid respectively, after 24 hours.Acquired results is as follows: (in table, numerical value is: Mass lost percentage ratio)
| Water | Acetic acid | Ammonia | Concentrated sulphuric acid | |
| Conventional carbon steel | 0 | 1.2 | 1.3 | 8 |
| Conventional rustless steel | 0 | 0.2 | 0.5 | 5 |
| Embodiment 1 | 0 | 0 | 0 | 1.3 |
| Embodiment 2 | 0 | 0 | 0 | 1.4 |
| Embodiment 3 | 0 | 0 | 0 | 1.0 |
| Embodiment 4 | 0 | 0 | 0 | 0.8 |
| Embodiment 5 | 0 | 0 | 0 | 0.9 |
| Embodiment 6 | 0 | 0 | 0 | 0.5 |
More than implementing row and the present invention does not constitute restriction, relevant staff is in the scope not necessarily departing from the technology of the present invention thought, and what carry out various changes and modifications, and all falls within protection scope of the present invention.
Claims (9)
1. the processing method of a corrosion-resistant easy molding special steel, it is good to it is characterized in that proportioning raw materials, forge, heat treatment, be placed in the container of full steam again, in 120～125 DEG C, keep 2～4 hours under 1.2～1.5MPa, then steam is replaced into air, in 150～155 DEG C, keep 2～4 hours under 1.2～1.5MPa after, obtain；Described proportioning raw materials according to mass percent is: carbon 0.05～0.1%, chromium 19～21%, nickel 4～8%, copper 0.1～0.12%, tungsten 0.4～0.5%, magnesium 0.4～0.5%, molybdenum 0.1～0.12%, and surplus is ferrum.
2. the processing method of corrosion-resistant easy molding special steel as claimed in claim 1, it is characterized in that described heat treatment is: heat steel to 860～880 DEG C is incubated 1～2 hour, come out of the stove after isothermal annealing and general annealing, then through twice preheating, temperature is increased to 1220～1280 DEG C and keeps 0.5～1 hour, then quench, after quenching, carry out tempering, totally three tempering immediately.
3. the processing method of corrosion-resistant easy molding special steel as claimed in claim 2, it is characterised in that described isothermal annealing is to be incubated 2 hours when being cooled to 720～750 DEG C；Then generally anneal, be cooled to less than 550 DEG C and come out of the stove.
4. the processing method of corrosion-resistant easy molding special steel as claimed in claim 2, it is characterised in that twice described preheating, first time preheating is to be warming up to 600～650 DEG C, is incubated 2 hours；Second time preheating is to be warming up to 800～850 DEG C, keeps 2 hours.
5. the processing method of corrosion-resistant easy molding special steel as claimed in claim 2, it is characterised in that described hardening media is the mixture of white oil and sodium salt.
6. the processing method of corrosion-resistant easy molding special steel as claimed in claim 2, it is characterised in that described sodium salt is sodium nitrate and sodium nitrite.
7. the processing method of corrosion-resistant easy molding special steel as claimed in claim 2, it is characterised in that white oil, sodium nitrate, sodium nitrite proportioning be 10:1:2.
8. the processing method of corrosion-resistant easy molding special steel as claimed in claim 2, it is characterised in that three times described tempering, first time be 560 DEG C 1 hour；550 DEG C 1.5 hours for the second time；560 DEG C 1 hour for the third time.
9. the processing method of corrosion-resistant easy molding special steel as claimed in claim 1, it is characterised in that described raw material also includes niobium, and its mass percent is 0.3～0.8%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714115A (en) * | 1995-04-08 | 1998-02-03 | Vsg Energie-Und Schmiedetechnik Gmbh | Austenitic steel alloy |
| CN105492641A (en) * | 2013-08-28 | 2016-04-13 | 株式会社日立制作所 | Duplex stainless steel, and duplex stainless steel structure, marine structure, petroleum/gas environment structure, pump impeller, pump casing, and flow adjustment valve body using same |
| CN105543647A (en) * | 2015-12-15 | 2016-05-04 | 安徽楚江特钢有限公司 | High-strength special steel alloy and preparation process thereof |
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2016
- 2016-05-24 CN CN201610348716.XA patent/CN105755397B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714115A (en) * | 1995-04-08 | 1998-02-03 | Vsg Energie-Und Schmiedetechnik Gmbh | Austenitic steel alloy |
| CN105492641A (en) * | 2013-08-28 | 2016-04-13 | 株式会社日立制作所 | Duplex stainless steel, and duplex stainless steel structure, marine structure, petroleum/gas environment structure, pump impeller, pump casing, and flow adjustment valve body using same |
| CN105543647A (en) * | 2015-12-15 | 2016-05-04 | 安徽楚江特钢有限公司 | High-strength special steel alloy and preparation process thereof |
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