CN105886956A - Economical duplex stainless steel sheet and preparation method thereof - Google Patents
Economical duplex stainless steel sheet and preparation method thereof Download PDFInfo
- Publication number
- CN105886956A CN105886956A CN201610505186.5A CN201610505186A CN105886956A CN 105886956 A CN105886956 A CN 105886956A CN 201610505186 A CN201610505186 A CN 201610505186A CN 105886956 A CN105886956 A CN 105886956A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- steel sheet
- phase stainless
- economizing type
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
-
- 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
- C21D8/0236—Cold rolling
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
Abstract
The invention discloses an economical duplex stainless steel sheet and a preparation method thereof. The stainless steel sheet comprises the following components in percentage by mass: 0.08 to 0.13 percent of C, 20 to 23 percent of Cr, 4 to 6 percent of Mn, 0.5 to 1.5 percent of Ni, 0.2 to 0.5 percent of Mo, 0.1 to 0.25 percent of N and the balance of iron and other inevitable impurities. The preparation method comprises the following steps: selecting and melting a raw material into molten steel according to the components; casting the molten steel into an ingot; performing hot rolling cogging and surface figuring on the ingot after a riser part is cut; performing hot rolling to obtain a hot-rolled plate with a thickness of 3 to 6mm; performing annealing, acid washing and cold rolling on the hot-rolled plate to obtain a sheet with a thickness of 1 to 1.5mm; performing solution annealing to obtain the economical duplex stainless steel sheet. According to the economical duplex stainless steel sheet and the preparation method thereof, by reasonable alloying design, the strength and the plasticity of the stainless steel sheet can be improved, hot rolling edge cracking can be eliminated, and the quality and the yield of the hot-rolled plate are greatly improved.
Description
Technical field
The present invention relates to technical field of steel rolling, be specifically related to a kind of economizing type two-phase stainless steel sheet and preparation method thereof.
Background technology
Two phase stainless steel is made up of ferrite and austenite phase, and two-phase proportion, close to 1:1, has the good characteristic of austenitic stainless steel and ferritic stainless steel concurrently.Current research center of gravity is Devoting Major Efforts To Developing economizing type two phase stainless steel, to substitute the austenitic stainless steels such as 304 even 316L, and the purpose reaching to economize on resources with reducing cost.
LDX2101 type two-phase stainless steel sheet becomes study hotspot in recent years, and compared with tradition two phase stainless steel, this economizing type two phase stainless steel uses can greatly reduce production cost with the Alloying Design of " Mn+N " replacement " Ni ".But, owing to this two phase stainless steel N content is higher, easily produce gas hole defect when being cast into ingot casting, affect lumber recovery, cause the significant wastage of resource.Meanwhile, high temperature austenite causes high temperature hardness to differ greatly with the difference of alloying elements distribution in high temperature iron ferritic, and in thermal deformation process, compatibility of deformation is poor, easily ftractures in course of hot rolling, and lumber recovery seriously reduces, and hinders industrialized production.
Summary of the invention
The problem existed for existing LDX2101 type two-phase stainless steel sheet, the present invention provides a kind of economizing type two-phase stainless steel sheet and preparation method thereof, designed by rational composition, and control hot rolling, cold rolling and solution annealing technique, obtain the thick surface quality two-phase stainless steel sheet split good, boundless of 1 ~ 1.5mm, described two-phase stainless steel sheet has suitable austenite content and excellent stabilization of austenite, and all it is greatly promoted owing to thin plate has TRIP effect, intensity and plasticity in plastic history.The technical scheme is that
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C 0.08 ~ 0.13%；Cr 20~23%；Mn 4~6%；Ni 0.5~1.5%；Mo
0.2~0.5%；N 0.1~0.25%；Surplus is ferrum and other inevitable impurity.
Described economizing type two-phase stainless steel sheet has TRIP effect, thickness is 1 ~ 1.5mm, austenite content is 35 ~ 55%, tensile break strength during room temperature is 850 ~ 1000MPa, and yield strength is 500 ~ 600MPa, and elongation after fracture is 40 ~ 65%, spot corrosion equivalent (PREN value) is 24 ~ 28, strength and ductility product is 40 ~ 54GPa%, and surface quality is good, boundless splits.
The preparation method of described economizing type two-phase stainless steel sheet, is carried out according to following processing step:
(1) according to C
0.08~0.13%、Cr 20~23%、Mn 4~6%、Ni
0.5 ~ 1.5%, Mo 0.2 ~ 0.5%, N 0.1 ~ 0.25%, surplus are chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy of ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1460 ~ 1530 DEG C；
(3) ingot casting excising rising head part, through 3 ~ 5 passage hot rolling coggings, cogging temperature is 1200 DEG C, and cogging drafts is 50 ~ 70mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1150 ~ 1250 DEG C, and finishing temperature is 960 ~ 1050 DEG C, hot rolling total reduction is 90 ~ 95%, and through 7 ~ 9 passes, percentage pass reduction is 20 ~ 35%, roll rear cooling by water, it is thus achieved that the hot rolled plate that 3 ~ 6mm is thick；
(5) by hot rolled plate 1000 ~ 1100 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 65 ~ 75%, it is thus achieved that 1 ~ 1.5mm thin thick plate；
(6) by flat cold-rolled sheet through 900 ~ 1150 DEG C of solution annealing 200 ~ 500s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Beneficial effects of the present invention:
1. the present invention is by rational Alloying Design, can obtain appropriate metastable austenite, and regulate and control the stability of austenite phase；And make it that TRIP effect that " γ → ε-martensite → α '-martensite " changes to occur in deformation process, thus improve intensity and plasticity, in addition, the economizing type two phase stainless steel thermoplasticity of the present invention is greatly improved, can eliminate hot-rolling edge cracking, hot rolled plate quality and lumber recovery are greatly improved.
2. the present invention makes carbon content of a relatively high in composition designs, in addition to simplifying decarbonization process, reducing part melting cost, part of nickel and nitrogen is replaced with carbon, the probability that gas hole defect occurs in melting and casting cycle it is substantially reduced while reducing cost of material, improve strand qualification rate, reduce preparation difficulty.
3. the economizing type two-phase stainless steel sheet of the present invention is suitable with the PREN value of LDX2101, its corrosion resisting property is effectively ensured, and its strong plasticity is better than LDX2101；Corrosion resistance and forming property are all better than 304 austenitic stainless steels, and alloy content also decreases, it is possible to achieve substitute the purpose of 304 austenitic stainless steels.
4. the preparation method of the economizing type two-phase stainless steel sheet of the present invention is by controlling hot rolling, cold rolling and solution annealing technique, thus obtains the thick surface quality two-phase stainless steel sheet split good, boundless of 1 ~ 1.5mm, is further ensured that its performance parameter.
Accompanying drawing explanation
Fig. 1 is edge and the photomacrograph on surface using traditional method to prepare its hot rolled plate during LDX2101；
Traditional method prepares the method for LDX2101: (1) according to alloying component is: C 0.015 ~ 0.03%, Mn 4.5 ~ 5.5%, Cr 21.0 ~ 22.0, Ni
1.5~1.7%、Mo 0.1~0.3%、Cu 0.15~0.35、N
0.20 ~ 0.24, surplus is chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, copper and Fe (CrN) alloy of ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and copper etc., electrolytic manganese and Fe (CrN) alloy melting is added after fusing, obtain molten steel and (require that in steel, carbon content is extremely low due to industrial, the most also need strictly to control decarbonization process, actual production can increase cost)；(2) casting；(3) cogging；(4) hot rolling: casting billet surface is carried out reconditioning, 1200 ~ 1250 DEG C of open rollings, rolling pass is 9 ~ 13 passages, percentage pass reduction is less than 20%, and finishing temperature is 900 ~ 1000 DEG C, uses air cooling or conventional section cooling after finish to gauge, rate of cooling is relatively slow, easily causes brittlement phase to separate out；(5) measure on edge crack of hot rolled plate part is removed, and through 1000 ~ 1100 DEG C of 15 ~ 30min that anneal, cold rolling after pickling；(6) solution treatment: cold-reduced sheet is through 1000 ~ 1150 DEG C of solution treatment 200 ~ 500s, it is thus achieved that production board.The yield strength of LDX2101 sheet material is 500 ~ 550MPa, tensile strength 750 ~ 800MPa, elongation percentage 30 ~ 40%, strength and ductility product be 23 ~ 32GPa%, PREN value be 24 ~ 27.
Fig. 2 is edge and the photomacrograph on surface that the embodiment of the present invention 1 prepares hot rolled plate during economizing type two-phase stainless steel sheet；
Fig. 3 is the engineering stress-strain curve of the economizing type two-phase stainless steel sheet of the embodiment of the present invention 1 preparation；
Fig. 4 is the polarization curve of the economizing type two-phase stainless steel sheet of the embodiment of the present invention 1 preparation.
Detailed description of the invention
Embodiment
1
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.11%；Cr=21.3%；Mn=4.6%；Ni=1.1%；Mo=0.4%；N=0.16%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.11%, Cr=21.3%, Mn=4.6%, Ni=1.1%, Mo=0.4%, N=0.16%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1500 DEG C；
(3) ingot casting excising rising head part, through 5 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 60mm, then figuring of surface；
(4) strand after figuring of surface is carried out hot rolling, start rolling temperature is 1150 DEG C, finishing temperature is 1030 DEG C, hot rolling total reduction is 90%, through 7 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, obtaining the thick hot rolled plate of 4mm, the photomacrograph on its edge and surface is as shown in Figure 2；
(5) by hot rolled plate 1050 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 75%, it is thus achieved that 1mm thin thick plate；
(6) by flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Fig. 1 provides edge and the photomacrograph on surface using traditional method to prepare its hot rolled plate during LDX2101, presents serious limit and splits phenomenon, and hot rolled plate surface quality prepared by the present embodiment is good, boundless splits phenomenon, as shown in Figure 2.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, and thickness is 1mm, austenite content 45%, tensile break strength 860MPa during room temperature, yield strength 530MPa, elongation after fracture 63%, spot corrosion equivalent (PREN value) is 25.2, strength and ductility product reaches 54GPa%, and surface quality is good, boundless splits, its mechanical curves is as shown in Figure 3, as shown in Figure 4, pitting potential, at about 330mv, illustrates that its corrosion resistance is suitable with 304 rustless steels (pitting potential about 300mV) to polarization curve.
Embodiment
2
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.08%；Cr=20.1%；Mn=4.2%；Ni=0.9%；Mo=0.5%；N=0.18%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.08%, Cr=20.1%, Mn=4.2%, Ni=0.9%, Mo=0.5%, N=0.18%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1480 DEG C；
(3) ingot casting excising rising head part, through 5 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 60mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1200 DEG C, and finishing temperature is 1050 DEG C, and hot rolling total reduction is 90%, and through 7 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, it is thus achieved that the hot rolled plate that 4mm is thick；
(5) by hot rolled plate 1050 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 75%, it is thus achieved that 1mm thin thick plate；
(6) by flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, thickness is 1mm, austenite content 46%, tensile break strength 900MPa during room temperature, yield strength 500MPa, elongation after fracture 58%, spot corrosion equivalent (PREN value) is 24.6, strength and ductility product reaches 52GPa%, and surface quality is good, boundless splits.
Embodiment
3
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.13%；Cr=22.8%；Mn=5.7%；Ni=0.5%；Mo=0.4%；N=0.22%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.13%, Cr=22.8%, Mn=5.7%, Ni=0.5%, Mo=0.4%, N=0.22%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1530 DEG C；
(3) ingot casting excising rising head part, through 3 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 60mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1250 DEG C, and finishing temperature is 1040 DEG C, and hot rolling total reduction is 95%, and through 9 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, it is thus achieved that the hot rolled plate that 3mm is thick；
(5) by hot rolled plate 1050 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 65%, it is thus achieved that 1mm thin thick plate；
(6) by flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, thickness is 1mm, austenite content 55%, tensile break strength 940MPa during room temperature, yield strength 580MPa, elongation after fracture 48%, strength and ductility product reaches 45GPa%, spot corrosion equivalent (PREN value) is 27.6, and surface quality is good, boundless splits.
Embodiment
4
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.08%；Cr=21.2%；Mn=4.8%；Ni=1.5%；Mo=0.2%；N=0.25%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.08%, Cr=21.2%, Mn=4.8%, Ni=1.5%, Mo=0.2%, N=0.25%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1460 DEG C；
(3) ingot casting excising rising head part, through 5 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 60mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1200 DEG C, and finishing temperature is 1060 DEG C, and hot rolling total reduction is 90%, and through 7 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, it is thus achieved that the hot rolled plate that 5mm is thick；
(5) by hot rolled plate 1000 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 70%, it is thus achieved that 1.5mm thin thick plate；
(6) by flat cold-rolled sheet through 1100 DEG C of solution annealing 200s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, thickness is 1.5mm, austenite content 44%, tensile break strength 900MPa during room temperature, yield strength 520MPa, elongation after fracture 49%, strength and ductility product reaches 44GPa%, spot corrosion equivalent (PREN value) is 25.9, and surface quality is good, boundless splits.
Embodiment
5
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.10%；Cr=20.5%；Mn=4.3%；Ni=0.8%；Mo=0.5%；N=0.2%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.10%, Cr=20.5%, Mn=4.3%, Ni=0.8%, Mo=0.5%, N=0.2%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1500 DEG C；
(3) ingot casting excising rising head part, through 5 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 70mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1200 DEG C, and finishing temperature is 1050 DEG C, and hot rolling total reduction is 90%, and through 7 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, it is thus achieved that the hot rolled plate that 6mm is thick；
(5) by hot rolled plate 1100 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 75%, it is thus achieved that 1.5mm thin thick plate；
(6) by flat cold-rolled sheet through 900 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, thickness is 1.5mm, austenite content 53%, tensile break strength 950MPa during room temperature, yield strength 500MPa, elongation after fracture 48%, strength and ductility product reaches 46GPa%, spot corrosion equivalent (PREN value) is 25.4, and surface quality is good, boundless splits.
Embodiment
6
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.08%；Cr=20%；Mn=6%；Ni=0.6%；Mo=0.2%；N=0.25%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.08%, Cr=20%, Mn=6%, Ni=0.6%, Mo=0.2%, N=0.25%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1500 DEG C；
(3) ingot casting excising rising head part, through 5 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 50mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1150 DEG C, and finishing temperature is 1000 DEG C, and hot rolling total reduction is 90%, and through 7 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, it is thus achieved that the hot rolled plate that 4mm is thick；
(5) by hot rolled plate 1050 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 75%, it is thus achieved that 1mm thin thick plate；
(6) by flat cold-rolled sheet through 1050 DEG C of solution annealing 300s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, thickness is 1mm, austenite content 48%, tensile break strength 980MPa during room temperature, yield strength 520MPa, elongation after fracture 55%, strength and ductility product reaches 54GPa%, spot corrosion equivalent (PREN value) is 24.7, and surface quality is good, boundless splits.
Embodiment
7
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.11%；Cr=21.3%；Mn=4.6%；Ni=1.1%；Mo=0.4%；N=0.16%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.11%, Cr=21.3%, Mn=4.6%, Ni=1.1%, Mo=0.4%, N=0.16%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1520 DEG C；
(3) ingot casting excising rising head part, through 5 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 70mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1150 DEG C, and finishing temperature is 1030 DEG C, and hot rolling total reduction is 90%, and through 7 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, it is thus achieved that the hot rolled plate that 4mm is thick；
(5) by hot rolled plate 1050 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 75%, it is thus achieved that 1mm thin thick plate；
(6) by flat cold-rolled sheet through 1000 DEG C of solution annealing 400s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, thickness is 1mm, austenite content 48%, tensile break strength 925MPa during room temperature, yield strength 560MPa, elongation after fracture 45%, strength and ductility product reaches 42GPa%, spot corrosion equivalent (PREN value) is 25.2, and surface quality is good, boundless splits.
Embodiment
8
:
A kind of economizing type two-phase stainless steel sheet, its composition according to mass percent is: C=0.08%；Cr=20%；Mn=6%；Ni=0.6%；Mo=0.2%；N=0.25%；Surplus is ferrum and other inevitable impurity.
The preparation method of above-mentioned economizing type two-phase stainless steel sheet, concretely comprises the following steps:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C=0.08%, Cr=20%, Mn=6%, Ni=0.6%, Mo=0.2%, N=0.25%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1500 DEG C；
(3) ingot casting excising rising head part, through 5 passage hot rolling coggings, cogging temperature 1200 DEG C, cogging drafts is 70mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1150 DEG C, and finishing temperature is 1000 DEG C, and hot rolling total reduction is 90%, and through 9 passes, percentage pass reduction is 20 ~ 35%, has rolled rear cooling by water, it is thus achieved that the hot rolled plate that 4mm is thick；
(5) by hot rolled plate 1050 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 75%, it is thus achieved that 1mm thin thick plate；
(6) by flat cold-rolled sheet through 950 DEG C of solution annealing 500s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Economizing type two phase stainless steel prepared by the present embodiment has TRIP effect, thickness is 1mm, austenite content 50%, tensile break strength 1000MPa during room temperature, yield strength 560MPa, elongation after fracture 46%, strength and ductility product reaches 46GPa%, spot corrosion equivalent (PREN value) is 24.7, and surface quality is good, boundless splits.
Claims (3)
1. an economizing type two-phase stainless steel sheet, it is characterised in that the composition of described economizing type two-phase stainless steel sheet according to mass percent is: C 0.08 ~ 0.13%；Cr 20~23%；Mn 4~6%；Ni 0.5~1.5%；Mo 0.2~0.5%；N 0.1~0.25%；Surplus is ferrum and other inevitable impurity.
A kind of economizing type two-phase stainless steel sheet the most according to claim 1, it is characterized in that described economizing type two-phase stainless steel sheet has TRIP effect, thickness is 1 ~ 1.5mm, and austenite content is 35 ~ 55%, and tensile break strength during room temperature is 850 ~ 1000MPa, yield strength is 500 ~ 600MPa, elongation after fracture is 40 ~ 65%, and spot corrosion equivalent (PREN value) is 24 ~ 28, and strength and ductility product is 40 ~ 54GPa%, surface quality is good, boundless splits.
3. the preparation method of a kind of economizing type two-phase stainless steel sheet described in claim 1, it is characterised in that carry out according to following processing step:
(1) according to chemical composition apolegamy electrolysis chromium, electrolytic manganese, pure iron, molybdenum, nickel, T10 carbon steel and Fe (CrN) alloy that C 0.08 ~ 0.13%, Cr 20 ~ 23%, Mn 4 ~ 6%, Ni 0.5 ~ 1.5%, Mo 0.2 ~ 0.5%, N 0.1 ~ 0.25%, surplus are ferrum and other inevitable impurity, first melting electrolysis chromium, pure iron, molybdenum, nickel and T10 carbon steel, add electrolytic manganese and Fe (CrN) alloy melting after fusing, obtain molten steel；
(2) by molten steel casting to mold, controlling cast temperature is 1460 ~ 1530 DEG C；
(3) ingot casting excising rising head part, through 3 ~ 5 passage hot rolling coggings, cogging temperature is 1200 DEG C, and cogging drafts is 50 ~ 70mm, then figuring of surface；
(4) strand after figuring of surface being carried out hot rolling, start rolling temperature is 1150 ~ 1250 DEG C, and finishing temperature is 960 ~ 1050 DEG C, hot rolling total reduction is 90 ~ 95%, and through 7 ~ 9 passes, percentage pass reduction is 20 ~ 35%, roll rear cooling by water, it is thus achieved that the hot rolled plate that 3 ~ 6mm is thick；
(5) by hot rolled plate 1000 ~ 1100 DEG C anneal 20min, cold rolling after pickling, control cold rolling reduction ratio 65 ~ 75%, it is thus achieved that 1 ~ 1.5mm thin thick plate；
(6) by flat cold-rolled sheet through 900 ~ 1150 DEG C of solution annealing 200 ~ 500s, economizing type two-phase stainless steel sheet after quenching, is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610505186.5A CN105886956B (en) | 2016-07-01 | 2016-07-01 | A kind of economizing type two-phase stainless steel sheet and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610505186.5A CN105886956B (en) | 2016-07-01 | 2016-07-01 | A kind of economizing type two-phase stainless steel sheet and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105886956A true CN105886956A (en) | 2016-08-24 |
| CN105886956B CN105886956B (en) | 2017-10-31 |
Family
ID=56718572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610505186.5A Active CN105886956B (en) | 2016-07-01 | 2016-07-01 | A kind of economizing type two-phase stainless steel sheet and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105886956B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950386A (en) * | 2018-06-29 | 2018-12-07 | 府谷县旭丽机电技术有限公司 | A kind of heat-resistant anticorrosive metallic magnesium refining pot and preparation method thereof |
| CN109013699A (en) * | 2018-06-27 | 2018-12-18 | 张家港浦项不锈钢有限公司 | A kind of production method of 2205 stainless steel roll bending |
| CN111074138A (en) * | 2019-12-31 | 2020-04-28 | 江苏新华合金有限公司 | 3944 solder strip and production process thereof |
| CN111944973A (en) * | 2019-05-17 | 2020-11-17 | 南京理工大学 | Preparation method of heterogeneous layered structure duplex stainless steel |
| CN113293272A (en) * | 2021-05-19 | 2021-08-24 | 中国兵器科学研究院宁波分院 | Method for improving high-nitrogen duplex stainless steel strong plasticity |
| CN113351836A (en) * | 2021-05-17 | 2021-09-07 | 包头钢铁（集团）有限责任公司 | Method for improving uniformity of steelmaking performance of laboratory small furnace |
| CN114045384A (en) * | 2021-11-10 | 2022-02-15 | 中国兵器科学研究院宁波分院 | Method for improving low-temperature impact toughness of low-nickel ferrite-austenite stainless steel |
| CN114164373A (en) * | 2021-11-10 | 2022-03-11 | 中国兵器科学研究院宁波分院 | Nb microalloying duplex stainless steel and preparation method thereof |
| CN116024503A (en) * | 2022-12-09 | 2023-04-28 | 东北大学 | Nickel-saving type duplex stainless steel wire with high strength and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57131347A (en) * | 1981-02-09 | 1982-08-14 | Sumitomo Metal Ind Ltd | Two-phase stainless steel for oil well pipe with superior corrosion resistance |
| US5942184A (en) * | 1993-10-20 | 1999-08-24 | Sumitomo Metal Industries, Ltd. | Stainless steel for high-purity gases |
| CN1914344A (en) * | 2004-01-29 | 2007-02-14 | 杰富意钢铁株式会社 | Austenitic-ferritic stainless steel with excellent formability |
| CN101090988A (en) * | 2004-12-27 | 2007-12-19 | Posco公司 | Duplex stainless steel having excellent corrosion resistance with low nickel |
| CN101608286A (en) * | 2008-06-20 | 2009-12-23 | 宝山钢铁股份有限公司 | A kind of duplex stainless steel with special magnetic property |
| CN102634740A (en) * | 2012-04-27 | 2012-08-15 | 宝山钢铁股份有限公司 | High-plasticity economical duplex stainless steel and manufacturing method thereof |
| CN105200341A (en) * | 2015-09-23 | 2015-12-30 | 宝钢不锈钢有限公司 | Economical duplex stainless steel with tensile strength larger than 1000 MPa and manufacturing method thereof |
| CN105518161A (en) * | 2013-07-05 | 2016-04-20 | 奥托库姆普联合股份公司 | Stainless steel resistant to delayed cracking and a method for its production |
| CN105543714A (en) * | 2015-12-25 | 2016-05-04 | 东北大学 | Duplex stainless steel thin strip and near-net shaping preparation method thereof |
-
2016
- 2016-07-01 CN CN201610505186.5A patent/CN105886956B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57131347A (en) * | 1981-02-09 | 1982-08-14 | Sumitomo Metal Ind Ltd | Two-phase stainless steel for oil well pipe with superior corrosion resistance |
| US5942184A (en) * | 1993-10-20 | 1999-08-24 | Sumitomo Metal Industries, Ltd. | Stainless steel for high-purity gases |
| CN1914344A (en) * | 2004-01-29 | 2007-02-14 | 杰富意钢铁株式会社 | Austenitic-ferritic stainless steel with excellent formability |
| CN101090988A (en) * | 2004-12-27 | 2007-12-19 | Posco公司 | Duplex stainless steel having excellent corrosion resistance with low nickel |
| CN101608286A (en) * | 2008-06-20 | 2009-12-23 | 宝山钢铁股份有限公司 | A kind of duplex stainless steel with special magnetic property |
| CN102634740A (en) * | 2012-04-27 | 2012-08-15 | 宝山钢铁股份有限公司 | High-plasticity economical duplex stainless steel and manufacturing method thereof |
| CN105518161A (en) * | 2013-07-05 | 2016-04-20 | 奥托库姆普联合股份公司 | Stainless steel resistant to delayed cracking and a method for its production |
| CN105200341A (en) * | 2015-09-23 | 2015-12-30 | 宝钢不锈钢有限公司 | Economical duplex stainless steel with tensile strength larger than 1000 MPa and manufacturing method thereof |
| CN105543714A (en) * | 2015-12-25 | 2016-05-04 | 东北大学 | Duplex stainless steel thin strip and near-net shaping preparation method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109013699A (en) * | 2018-06-27 | 2018-12-18 | 张家港浦项不锈钢有限公司 | A kind of production method of 2205 stainless steel roll bending |
| CN108950386A (en) * | 2018-06-29 | 2018-12-07 | 府谷县旭丽机电技术有限公司 | A kind of heat-resistant anticorrosive metallic magnesium refining pot and preparation method thereof |
| CN111944973A (en) * | 2019-05-17 | 2020-11-17 | 南京理工大学 | Preparation method of heterogeneous layered structure duplex stainless steel |
| CN111074138A (en) * | 2019-12-31 | 2020-04-28 | 江苏新华合金有限公司 | 3944 solder strip and production process thereof |
| CN113351836A (en) * | 2021-05-17 | 2021-09-07 | 包头钢铁（集团）有限责任公司 | Method for improving uniformity of steelmaking performance of laboratory small furnace |
| CN113293272A (en) * | 2021-05-19 | 2021-08-24 | 中国兵器科学研究院宁波分院 | Method for improving high-nitrogen duplex stainless steel strong plasticity |
| CN114045384A (en) * | 2021-11-10 | 2022-02-15 | 中国兵器科学研究院宁波分院 | Method for improving low-temperature impact toughness of low-nickel ferrite-austenite stainless steel |
| CN114164373A (en) * | 2021-11-10 | 2022-03-11 | 中国兵器科学研究院宁波分院 | Nb microalloying duplex stainless steel and preparation method thereof |
| CN114045384B (en) * | 2021-11-10 | 2023-09-08 | 中国兵器科学研究院宁波分院 | Method for improving low-temperature impact toughness of low-nickel ferrite-austenitic stainless steel |
| CN116024503A (en) * | 2022-12-09 | 2023-04-28 | 东北大学 | Nickel-saving type duplex stainless steel wire with high strength and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105886956B (en) | 2017-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105886956B (en) | A kind of economizing type two-phase stainless steel sheet and preparation method thereof | |
| CN104357754B (en) | A kind of corrosionproof steel against sulfuric acid at dew point plate and manufacture method thereof | |
| CN106319343B (en) | Low-cost high-strength stainless steel and welded pipe manufacturing method thereof | |
| CN109266958B (en) | F-grade steel for series ship and ocean engineering and flexible production method thereof | |
| JP5979338B1 (en) | Thick, high toughness, high strength steel plate with excellent material uniformity and method for manufacturing the same | |
| CN107419180B (en) | A kind of the electrogalvanizing cold-rolled steel sheet and production method of yield strength >=250MPa | |
| WO2020169075A1 (en) | High-strength weather-proof thin steel strip and production method therefor | |
| CN104264064B (en) | A kind of special think gauge Q690 high strength structure plate and manufacture method thereof | |
| CN100516274C (en) | 03Cr22Ni4NbN austenite-ferritic stainless steel and production technology therefor | |
| WO2015140846A1 (en) | High toughness and high tensile strength thick steel plate and production method therefor | |
| CN101748339B (en) | High-strength ferritic stainless steel band and manufacturing method thereof | |
| CN102492894A (en) | High-dimension stable corrosion-resistant martensite steel and preparation method of steel structural material | |
| CN109504897A (en) | A kind of big thickness water power steel of 80kg grades of low-carbon-equivalent low-crackle sensitive and its manufacturing method | |
| CN107604255B (en) | A kind of the 9Ni low-temperature (low temperature) vessel steel plate peculiar to vessel and its manufacturing method of high flaw detection quality | |
| CN109628828B (en) | Low-yield-ratio ultra-thick hydroelectric high-strength steel plate and manufacturing method thereof | |
| WO2021143661A1 (en) | High corrosion-resistance strip steel and manufacturing method therefor | |
| CN103205653A (en) | Duplex stainless steel with excellent thermoplasticity and corrosion resistance and manufacturing method thereof | |
| CN109609845A (en) | A kind of 500MPa grades of weathering steel and its production method | |
| CN108624744A (en) | A kind of Q500qE bridge steel plates and its production method | |
| CN105925889A (en) | Ultrathick specification 1.2311 mold steel plate and preparation method thereof | |
| CN107829043A (en) | A kind of near-net forming preparation method of super-duplex stainless steel strip | |
| CN113751679B (en) | Manufacturing method of cobalt-free maraging steel cold-rolled thin strip | |
| CN101724784B (en) | Stainless cold-rolling strip steel and manufacturing method thereof | |
| CN110904392A (en) | Ultra-low carbon anti-pressure thin-specification cold-rolled sheet for battery shell and production method thereof | |
| WO2020019539A1 (en) | Thick 420 mpa grade low yield ratio low temperature bridge steel and production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |