CN104789886A - Corrosion-resistant steel for storage facility and preparation method thereof - Google Patents
Corrosion-resistant steel for storage facility and preparation method thereof Download PDFInfo
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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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
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- 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
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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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- 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
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Abstract
The invention discloses a corrosion-resistant steel for a storage facility and a preparation method thereof. The corrosion-resistant steel comprises the following components by mass percent: 0.28-0.31% of C, 5.7-6.9% of Cr, 2.5-3.7% of Ni, 1.23-1.45% of Sr, 1.21-1.29% of Mn, 0.14-0.16% of Si, 0.03-0.05% of Y, 0.13-0.25% of Mg, 0.06-0.08% of V, 1.8-2.1% of Ti, 0.15-0.27% of Al, 0.05-0.15% of Zr, 0.05-0.07% of Cu, 0.23-0.25% of Mo, 0.12-0.15% of lanthanide series rare earth elements, and the balance of Fe and unavoidable impurities, wherein the impurities comprise P less than or equal to 0.005%, S less than or equal to 0.0056%, H less than or equal to 0.003%, N less than or equal to 0.006%, and O less than or equal to 45 ppm. The corrosion-resistant steel disclosed by the invention is high in corrosion resistance, high in transverse yield strength, and excellent in low-temperature toughness.
Description
Technical field
The present invention relates to a kind of corrosion-resistant steel and heat treating method thereof, specifically a kind of corrosion-resistant steel for storage facilities and preparation method thereof.
Background technology
Storage facilities refers to the technique device and facility that can meet storage and custody articles needs, and storage facilities is stored in a warehouse and logistlcs technology level item key just, and modern storage facilities embodies the development of modern storage and logistlcs technology.Shelf in storage facilities are the equipment relatively commonly used, needs are deposited due to special material, working conditions and the environment of shelf are more and more harsher, more and more thicker to the thickness requirement of steel plate, correspondingly also improve constantly the technical requirements of the steel plate for storage facilities.Especially for when depositing some perishable goods, usually can cause storage facilities just fracture at short notice because of being corroded of steel plate, add warehouse cost; And in some cold districts, the low-temperature flexibility in the steel plate of shelf load-bearing is not high yet, storage facilities just fracture at short notice also often can be caused.Therefore the anticorrosive and transverse yield strength how effectively improving the steel plate being used for storage facilities is those skilled in the art's technical issues that need to address always.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of corrosion-resistant steel for storage facilities and heat treating method thereof, has strong corrosion resistance, high-ductility, and have excellent low temperature toughness.
The technical scheme that the present invention solves above technical problem is: provide a kind of corrosion-resistant steel for storage facilities, the composition of this corrosion-resistant steel and mass percent are: C:0.28-0.31%, Cr:5.7-6.9%, Ni:2.5-3.7%, Sr:1.23-1.45%, Mn:1.21-1.29%, Si:0.14-0.16%, Y:0.03-0.05%, Mg:0.13-0.25%, V:0.06-0.08%, Ti:1.8-2.1%, Al:0.15-0.27%, Zr:0.05-0.15%, Cu:0.05-0.07%, Mo:0.23-0.25%, lanthanide series rare-earth elements 0.12-0.18%, surplus is Fe and inevitable impurity,
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:9-15%, Ce:14-19%, Er:0-4%, Pr:6-9%, Pm:1-3%, Dy:0-5%, Gd:3-7%, and surplus is La;
This anti-corrosion steel plate is 4.5-4.9 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, pearlite colony mean diameter is 3.6-3.8 μm, 1/4 thickness is 5.1-5.6 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.8-7.1 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
Further restriction technical scheme of the present invention, the aforesaid corrosion-resistant steel for storage facilities, the composition of this corrosion-resistant steel and mass percent are: C:0.28%, Cr:5.7%, Ni:2.5%, Sr:1.23%, Mn:1.21%, Si:0.14%, Y:0.03%, Mg:0.13%, V:0.06%, Ti:1.8%, Al:0.15%, Zr:0.05%, Cu:0.05%, Mo:0.23%, lanthanide series rare-earth elements 0.12%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:9%, Ce:14%, Pr:6%, Pm:1%, Gd:3%, and surplus is La;
This anti-corrosion steel plate is 4.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.6 μm, and 1/4 thickness is 5.1 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.8 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
The aforesaid corrosion-resistant steel for storage facilities, the composition of this corrosion-resistant steel and mass percent are: C:0.29%, Cr:6.2%, Ni:2.7%, Sr:1.35%, Mn:1.25%, Si:0.15%, Y:0.04%, Mg:0.19%, V:0.07%, Ti:1.9%, Al:0.22%, Zr:0.10%, Cu:0.06%, Mo:0.24%, lanthanide series rare-earth elements 0.16%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:11%, Ce:17%, Er:2%, Pr:7%, Pm:2%, Dy:4%, Gd:4%, and surplus is La;
This anti-corrosion steel plate is 4.7 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.7 μm, and 1/4 thickness is 5.5 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.9 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
The aforesaid corrosion-resistant steel for storage facilities, the composition of this corrosion-resistant steel and mass percent are: C:0.31%, Cr:6.9%, Ni:3.7%, Sr:1.45%, Mn:1.29%, Si:0.16%, Y:0.05%, Mg:0.25%, V:0.08%, Ti:2.1%, Al:0.27%, Zr:0.15%, Cu:0.07%, Mo:0.25%, lanthanide series rare-earth elements 0.18%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:15%, Ce:19%, Er:4%, Pr:9%, Pm:3%, Dy:5%, Gd:7%, and surplus is La;
This anti-corrosion steel plate is 4.9 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8 μm, and 1/4 thickness is 5.6 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.1 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
For a heat treating method for the corrosion-resistant steel of storage facilities,
(i) the steel smelted are sent into process furnace and be heated to 1150-1170 DEG C, after coming out of the stove, be cooled fast to 680-695 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1230-1250 DEG C, then water-cooled is adopted to be combined with air cooling online, first adopt water-cooled with the rate of cooling of 3-5 DEG C/s by steel water-cooled to 790-820 DEG C, then air cooling is to 730-750 DEG C, then adopt water-cooled with the rate of cooling of 1-3 DEG C/s by steel water-cooled to 660-680 DEG C; Then in quenching device with water or hardening liquid carry out for time 30-35 quench second, be then heated to 880-920 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10-13 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 780-810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10-13 DEG C/s without insulation, make steel temperature be cooled to the following 10-30 DEG C of Ms point;
(iv) the steel after quenching are heated to 610-620 DEG C through tempering process furnace, are incubated 42-45 second;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 5-8 DEG C/s, steel are chilled to 450-470 DEG C online, then be heated to 790-810 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 5-8 DEG C/s by steel water-cooled to room temperature.
The heat treating method of the aforesaid corrosion-resistant steel for storage facilities,
(i) the steel smelted are sent into process furnace and be heated to 1150 DEG C, after coming out of the stove, be cooled fast to 680 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1230 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 5 DEG C/s by steel water-cooled to 790 DEG C, then air cooling to 730 DEG C, then adopt water-cooled with the rate of cooling of 1 DEG C/s by steel water-cooled to 660 DEG C; Then in quenching device with water or hardening liquid carry out for time 30 seconds quenching, be then heated to 880 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10 DEG C/s without insulation, make steel temperature be cooled to following 10 DEG C of Ms point;
(iv) the steel after quenching are heated to 610 DEG C through tempering process furnace, are incubated 42 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 5 DEG C/s, steel are chilled to 450 DEG C online, be then heated to 790 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 5 DEG C/s by steel water-cooled to room temperature.
The heat treating method of the aforesaid corrosion-resistant steel for storage facilities,
(i) the steel smelted are sent into process furnace and be heated to 1160 DEG C, after coming out of the stove, be cooled fast to 685 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1240 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 4 DEG C/s by steel water-cooled to 810 DEG C, then air cooling to 740 DEG C, then adopt water-cooled with the rate of cooling of 2 DEG C/s by steel water-cooled to 670 DEG C; Then in quenching device with water or hardening liquid carry out for time 32 seconds quenching, be then heated to 890 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 11 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 790 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 12 DEG C/s without insulation, make steel temperature be cooled to following 18 DEG C of Ms point;
(iv) the steel after quenching are heated to 615 DEG C through tempering process furnace, are incubated 43 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 6 DEG C/s, steel are chilled to 460 DEG C online, be then heated to 800 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 7 DEG C/s by steel water-cooled to room temperature.
Further, the heat treating method of the aforesaid corrosion-resistant steel for storage facilities,
(i) the steel smelted are sent into process furnace and be heated to 1170 DEG C, after coming out of the stove, be cooled fast to 695 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1250 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 3 DEG C/s by steel water-cooled to 820 DEG C, then air cooling to 750 DEG C, then adopt water-cooled with the rate of cooling of 1 DEG C/s by steel water-cooled to 680 DEG C; Then in quenching device with water or hardening liquid carry out for time 30 seconds quenching, be then heated to 920 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10 DEG C/s without insulation, make steel temperature be cooled to following 10 DEG C of Ms point;
(iv) the steel after quenching are heated to 620 DEG C through tempering process furnace, are incubated 42 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 8 DEG C/s, steel are chilled to 470 DEG C online, be then heated to 810 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 8 DEG C/s by steel water-cooled to room temperature.
The invention has the beneficial effects as follows:
The effect that in corrosion-resistant steel composition of the present invention, the control of each constituent content is played is: the present invention adds rare-earth elements of lanthanum, cerium and praseodymium, and add martensitic stucture by austenite can be obtained in conjunction with thermal treatment process, in this corrosion-resistant steel, first-phase is austenite, second-phase is martensite, at thickness place, surface to 1/4, second-phase percent by volume is 5.1-5.3%, and 1/4 thickness is 7.3-7.5% to center second-phase percent by volume; Thus the high-strength anti-corrosion corrosion-resistant steel successfully produced for metal door and window, there is good transverse yield strength and high-ductility.
The present invention, under the prerequisite not affecting steel strength and density, adds element silicon and the boron of certain content, promotes the erosion resistance of steel, and under acid and basic solution corrode, the longer time keeps steel characteristics.The present invention is after normalizing treatment, quench treatment and temper operation terminate in addition, Tempering and Quenching operation is carried out to steel, repeat normalizing and tempering process, guarantee that the element silicon and boron etc. added is evenly distributed on steel inside, improve steel strength, under the prerequisite not affecting steel autologous density, reach corrosion resistant effect.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited thereto.
embodiment 1
The present embodiment is a kind of corrosion-resistant steel for storage facilities, the composition of this corrosion-resistant steel and mass percent are: C:0.28%, Cr:5.7%, Ni:2.5%, Sr:1.23%, Mn:1.21%, Si:0.14%, Y:0.03%, Mg:0.13%, V:0.06%, Ti:1.8%, Al:0.15%, Zr:0.05%, Cu:0.05%, Mo:0.23%, lanthanide series rare-earth elements 0.12%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:9%, Ce:14%, Pr:6%, Pm:1%, Gd:3%, and surplus is La;
This anti-corrosion steel plate is 4.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.6 μm, and 1/4 thickness is 5.1 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.8 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
The heat treating method of the corrosion-resistant steel for storage facilities that the present embodiment provides: comprise following steps:
(i) the steel smelted are sent into process furnace and be heated to 1150 DEG C, after coming out of the stove, be cooled fast to 680 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1230 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 5 DEG C/s by steel water-cooled to 790 DEG C, then air cooling to 730 DEG C, then adopt water-cooled with the rate of cooling of 1 DEG C/s by steel water-cooled to 660 DEG C; Then in quenching device with water or hardening liquid carry out for time 30 seconds quenching, be then heated to 880 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10 DEG C/s without insulation, make steel temperature be cooled to following 10 DEG C of Ms point;
(iv) the steel after quenching are heated to 610 DEG C through tempering process furnace, are incubated 42 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 5 DEG C/s, steel are chilled to 450 DEG C online, be then heated to 790 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 5 DEG C/s by steel water-cooled to room temperature.
embodiment 2
The present embodiment is a kind of corrosion-resistant steel for storage facilities, the composition of this corrosion-resistant steel and mass percent are: C:0.29%, Cr:6.2%, Ni:2.7%, Sr:1.35%, Mn:1.25%, Si:0.15%, Y:0.04%, Mg:0.19%, V:0.07%, Ti:1.9%, Al:0.22%, Zr:0.10%, Cu:0.06%, Mo:0.24%, lanthanide series rare-earth elements 0.16%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:11%, Ce:17%, Er:2%, Pr:7%, Pm:2%, Dy:4%, Gd:4%, and surplus is La;
This anti-corrosion steel plate is 4.7 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.7 μm, and 1/4 thickness is 5.5 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.9 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
The heat treating method of the corrosion-resistant steel for storage facilities that the present embodiment provides: comprise following steps:
(i) the steel smelted are sent into process furnace and be heated to 1160 DEG C, after coming out of the stove, be cooled fast to 685 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1240 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 4 DEG C/s by steel water-cooled to 810 DEG C, then air cooling to 740 DEG C, then adopt water-cooled with the rate of cooling of 2 DEG C/s by steel water-cooled to 670 DEG C; Then in quenching device with water or hardening liquid carry out for time 32 seconds quenching, be then heated to 890 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 11 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 790 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 12 DEG C/s without insulation, make steel temperature be cooled to following 18 DEG C of Ms point;
(iv) the steel after quenching are heated to 615 DEG C through tempering process furnace, are incubated 43 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 6 DEG C/s, steel are chilled to 460 DEG C online, be then heated to 800 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 7 DEG C/s by steel water-cooled to room temperature.
embodiment 3
The present embodiment is a kind of corrosion-resistant steel for storage facilities, the composition of this corrosion-resistant steel and mass percent are: C:0.31%, Cr:6.9%, Ni:3.7%, Sr:1.45%, Mn:1.29%, Si:0.16%, Y:0.05%, Mg:0.25%, V:0.08%, Ti:2.1%, Al:0.27%, Zr:0.15%, Cu:0.07%, Mo:0.25%, lanthanide series rare-earth elements 0.18%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:15%, Ce:19%, Er:4%, Pr:9%, Pm:3%, Dy:5%, Gd:7%, and surplus is La;
This anti-corrosion steel plate is 4.9 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8 μm, and 1/4 thickness is 5.6 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.1 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
The heat treating method of the corrosion-resistant steel for storage facilities that the present embodiment provides: comprise following steps:
(i) the steel smelted are sent into process furnace and be heated to 1170 DEG C, after coming out of the stove, be cooled fast to 695 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1250 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 3 DEG C/s by steel water-cooled to 820 DEG C, then air cooling to 750 DEG C, then adopt water-cooled with the rate of cooling of 1 DEG C/s by steel water-cooled to 680 DEG C; Then in quenching device with water or hardening liquid carry out for time 30 seconds quenching, be then heated to 920 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10 DEG C/s without insulation, make steel temperature be cooled to following 10 DEG C of Ms point;
(iv) the steel after quenching are heated to 620 DEG C through tempering process furnace, are incubated 42 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 8 DEG C/s, steel are chilled to 470 DEG C online, be then heated to 810 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 8 DEG C/s by steel water-cooled to room temperature.
The performance of each embodiment corrosion-resistant steel is as shown in table 1.
The performance of each embodiment corrosion-resistant steel of table 1
As seen from the above table, corrosion-resistant steel of the present invention has good intensity, plasticity and low-temperature flexibility, Properties of HIC resistance and anti-SSC performance.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (8)
1. the corrosion-resistant steel for storage facilities, it is characterized in that: the composition of this corrosion-resistant steel and mass percent are: C:0.28-0.31%, Cr:5.7-6.9%, Ni:2.5-3.7%, Sr:1.23-1.45%, Mn:1.21-1.29%, Si:0.14-0.16%, Y:0.03-0.05%, Mg:0.13-0.25%, V:0.06-0.08%, Ti:1.8-2.1%, Al:0.15-0.27%, Zr:0.05-0.15%, Cu:0.05-0.07%, Mo:0.23-0.25%, lanthanide series rare-earth elements 0.12-0.18%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:9-15%, Ce:14-19%, Er:0-4%, Pr:6-9%, Pm:1-3%, Dy:0-5%, Gd:3-7%, and surplus is La;
This anti-corrosion steel plate is 4.5-4.9 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, pearlite colony mean diameter is 3.6-3.8 μm, 1/4 thickness is 5.1-5.6 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.8-7.1 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
2. as claimed in claim 1 for the corrosion-resistant steel of storage facilities, it is characterized in that: the composition of this corrosion-resistant steel and mass percent are: C:0.28%, Cr:5.7%, Ni:2.5%, Sr:1.23%, Mn:1.21%, Si:0.14%, Y:0.03%, Mg:0.13%, V:0.06%, Ti:1.8%, Al:0.15%, Zr:0.05%, Cu:0.05%, Mo:0.23%, lanthanide series rare-earth elements 0.12%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:9%, Ce:14%, Pr:6%, Pm:1%, Gd:3%, and surplus is La;
This anti-corrosion steel plate is 4.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.6 μm, and 1/4 thickness is 5.1 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.8 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
3. as claimed in claim 1 for the corrosion-resistant steel of storage facilities, it is characterized in that: the composition of this corrosion-resistant steel and mass percent are: C:0.29%, Cr:6.2%, Ni:2.7%, Sr:1.35%, Mn:1.25%, Si:0.15%, Y:0.04%, Mg:0.19%, V:0.07%, Ti:1.9%, Al:0.22%, Zr:0.10%, Cu:0.06%, Mo:0.24%, lanthanide series rare-earth elements 0.16%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:11%, Ce:17%, Er:2%, Pr:7%, Pm:2%, Dy:4%, Gd:4%, and surplus is La;
This anti-corrosion steel plate is 4.7 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.7 μm, and 1/4 thickness is 5.5 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 6.9 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
4. as claimed in claim 1 for the corrosion-resistant steel of storage facilities, it is characterized in that: the composition of this corrosion-resistant steel and mass percent are: C:0.31%, Cr:6.9%, Ni:3.7%, Sr:1.45%, Mn:1.29%, Si:0.16%, Y:0.05%, Mg:0.25%, V:0.08%, Ti:2.1%, Al:0.27%, Zr:0.15%, Cu:0.07%, Mo:0.25%, lanthanide series rare-earth elements 0.18%, surplus is Fe and inevitable impurity;
Described impurity comprises: P≤0.005%, S≤0.0056%, H≤0.003%, N≤0.006%, O≤45ppm;
Wherein the chemical composition mass percentage of lanthanon is: Nd:15%, Ce:19%, Er:4%, Pr:9%, Pm:3%, Dy:5%, Gd:7%, and surplus is La;
This anti-corrosion steel plate is 4.9 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8 μm, and 1/4 thickness is 5.6 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.1 μm;
In this storage facilities corrosion-resistant steel, the number density of carbide is for being greater than 1.1/μm
2, the individual percentage that the thick carbide of particle diameter more than 0.4 μm is shared in described carbide is less than 0.1; This window frame corrosion-resistant steel is erosion resistance≤0.005 mm/ under the acidic conditions of 4 ~ 7 at pH, is erosion resistance≤0.006 mm/ under the alkaline condition of 7 ~ 10 in pH value.
5. the heat treating method of the corrosion-resistant steel for storage facilities as described in claim arbitrary in claim 1-4, is characterized in that:
(i) the steel smelted are sent into process furnace and be heated to 1150-1170 DEG C, after coming out of the stove, be cooled fast to 680-695 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1230-1250 DEG C, then water-cooled is adopted to be combined with air cooling online, first adopt water-cooled with the rate of cooling of 3-5 DEG C/s by steel water-cooled to 790-820 DEG C, then air cooling is to 730-750 DEG C, then adopt water-cooled with the rate of cooling of 1-3 DEG C/s by steel water-cooled to 660-680 DEG C; Then in quenching device with water or hardening liquid carry out for time 30-35 quench second, be then heated to 880-920 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10-13 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 780-810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10-13 DEG C/s without insulation, make steel temperature be cooled to the following 10-30 DEG C of Ms point;
(iv) the steel after quenching are heated to 610-620 DEG C through tempering process furnace, are incubated 42-45 second;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 5-8 DEG C/s, steel are chilled to 450-470 DEG C online, then be heated to 790-810 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 5-8 DEG C/s by steel water-cooled to room temperature.
6. as claimed in claim 5 for the heat treating method of the corrosion-resistant steel of storage facilities, it is characterized in that: (i) the steel smelted are sent into process furnace and be heated to 1150 DEG C, after coming out of the stove, be cooled fast to 680 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1230 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 5 DEG C/s by steel water-cooled to 790 DEG C, then air cooling to 730 DEG C, then adopt water-cooled with the rate of cooling of 1 DEG C/s by steel water-cooled to 660 DEG C; Then in quenching device with water or hardening liquid carry out for time 30 seconds quenching, be then heated to 880 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10 DEG C/s without insulation, make steel temperature be cooled to following 10 DEG C of Ms point;
(iv) the steel after quenching are heated to 610 DEG C through tempering process furnace, are incubated 42 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 5 DEG C/s, steel are chilled to 450 DEG C online, be then heated to 790 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 5 DEG C/s by steel water-cooled to room temperature.
7. as claimed in claim 5 for the heat treating method of the corrosion-resistant steel of storage facilities, it is characterized in that: (i) the steel smelted are sent into process furnace and be heated to 1160 DEG C, after coming out of the stove, be cooled fast to 685 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1240 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 4 DEG C/s by steel water-cooled to 810 DEG C, then air cooling to 740 DEG C, then adopt water-cooled with the rate of cooling of 2 DEG C/s by steel water-cooled to 670 DEG C; Then in quenching device with water or hardening liquid carry out for time 32 seconds quenching, be then heated to 890 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 11 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 790 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 12 DEG C/s without insulation, make steel temperature be cooled to following 18 DEG C of Ms point;
(iv) the steel after quenching are heated to 615 DEG C through tempering process furnace, are incubated 43 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 6 DEG C/s, steel are chilled to 460 DEG C online, be then heated to 800 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 7 DEG C/s by steel water-cooled to room temperature.
8. as claimed in claim 5 for the heat treating method of the corrosion-resistant steel of storage facilities, it is characterized in that: (i) the steel smelted are sent into process furnace and be heated to 1170 DEG C, after coming out of the stove, be cooled fast to 695 DEG C by pressurized air;
(ii) by steel hot rolling to desired size, hot-rolled temperature is 1250 DEG C, then adopts water-cooled to be combined with air cooling online, first adopts water-cooled with the rate of cooling of 3 DEG C/s by steel water-cooled to 820 DEG C, then air cooling to 750 DEG C, then adopt water-cooled with the rate of cooling of 1 DEG C/s by steel water-cooled to 680 DEG C; Then in quenching device with water or hardening liquid carry out for time 30 seconds quenching, be then heated to 920 DEG C of tempering through tempering process furnace, then adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 10 DEG C/s, steel are chilled to room temperature;
(iii) induction heating is carried out to the steel after hot rolling, Heating temperature is 810 DEG C, the steel completed by induction heating more directly carry out quench treatment with high pressure spray jetting or hardening liquid, quench cooling rate 10 DEG C/s without insulation, make steel temperature be cooled to following 10 DEG C of Ms point;
(iv) the steel after quenching are heated to 620 DEG C through tempering process furnace, are incubated 42 seconds;
(v) adopted by the steel after tempering pressurized air or vaporific hardening liquid, with the rate of cooling of 8 DEG C/s, steel are chilled to 470 DEG C online, be then heated to 810 DEG C through process furnace, then adopt water-cooled with the rate of cooling of 8 DEG C/s by steel water-cooled to room temperature.
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| CN106756594A (en) * | 2016-12-15 | 2017-05-31 | 苏州科胜仓储物流设备有限公司 | A kind of shelf post high strength alloy steel and its manufacture method |
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