CN109609853A - A kind of high manganese steel for low temperature storage tank and preparation method thereof - Google Patents
A kind of high manganese steel for low temperature storage tank and preparation method thereof Download PDFInfo
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- CN109609853A CN109609853A CN201910030870.6A CN201910030870A CN109609853A CN 109609853 A CN109609853 A CN 109609853A CN 201910030870 A CN201910030870 A CN 201910030870A CN 109609853 A CN109609853 A CN 109609853A
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
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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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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A kind of low-temperature storage tank potassium steel of the invention and preparation method thereof, ladle includes component and its mass percent are as follows: C 0.2~0.55%, Si 0.1~0.8%, Mn 20~26%, P≤0.02%, S≤0.01%, Al 1~3%, Cu 0.1~1%, V 0.01~0.08%, Ti 0.05~0.15%, Cr 2~4, surplus are Fe and inevitable impurity.Preparation method are as follows: according to the ratio after ingredient melting, after casting, through Homogenization Treatments, after hot forging is at base, hot rolling is carried out by heat preservation, controls cooling velocity, hot rolled plate is cooling, obtained low-temperature storage tank potassium steel.The potassium steel ingredient is simple, at low cost, function admirable, and yield strength >=381MPa, tensile strength >=800MPa, elongation >=60%, weldability and corrosion resistance meet service demand.
Description
Technical field:
The invention belongs to steel material technical fields, and in particular to a kind of low-temperature storage tank potassium steel and preparation method thereof.
Background technique:
With the rapid development of social economy, Energy situation and environmental problem are increasingly serious, exploiting economy, environmentally friendly new energy
Source and conventional energy resource, which clean, utilizes the important channel for being solution environmental pollution and energy deficiency.The natural gas thermal efficiency
Height, environmental benefit is good, and development and utilization natural gas becomes the trend of world today's energy development.It is united according to International Energy Agency (IEA)
Meter, Present Global natural gas resources are 751 tcms, according to current consumption level, suitable development about 200 years.
It expects 2035, natural gas will become the global first big energy, and natural gas resource is sufficient, and supply and demand total amount will be from 2010
3.1 tcms rise to about 5 tcms of the year two thousand thirty.
Due to the high-efficient development of gas industry, natural gas resource is unevenly distributed in addition so that the storage and transportation of natural gas at
To need one of the critical issue solved.Usually, the storage and transportation mode of natural gas substantially has 5 kinds, oil pipeline and storage (PNG), liquid
Change storage and transportation (LNG), compressing, stalling and transporting (CNG), absorption storage and transportation (ANG), hydrate storage and transportation (NGH).Wherein, LNG storage and transportation is high by it
Effect, cleaning, conveniently, it is safe the features such as, development is swift and violent in recent years.
Storage and transportation space and cost can be greatlyd save after natural gas liquefaction, and has the characteristics that calorific value is big, performance is high, no
It crosses, due to being low temperature storage and transportation, the requirement to tank material is also increased therewith.Currently, common LNG storage tank material have 9%Ni steel,
Austenitic stainless steel, aluminium alloy and invar alloy.In addition to 9%Ni steel, other three kinds of materials are Face-centred Cubic Metals, this is just protected
The high tenacity under cryogenic conditions has been demonstrate,proved (Face-centred Cubic Metals do not have ductile-brittle transiton).Though 9%Ni steel is bcc metals, lead to
The effect for crossing special heat treatment process and Ni element can make its same low-temperature flexibility with higher.Although the above material
Requirement can be reached in aspect of performance, but in place of Shortcomings, such as plate and welding material is expensive, design strength
The problems such as low, welding difficulty.
Summary of the invention:
The purpose of the present invention is overcoming above-mentioned the shortcomings of the prior art, provide a kind of low-temperature storage tank potassium steel and its
Preparation method, manganese and carbon are austenite stabilizer elements in steel, and the present invention is by suitable strengthening mechanism, so that the height of low cost
Manganese alloy can be provided simultaneously with high-intensitive and high tenacity at low temperature.The mentality of designing of low-carbon in, by carbon, silicon, manganese,
The interaction of the microalloy elements such as the elements such as aluminium, copper and vanadium, titanium, and it is aided with suitable preparation process, guaranteeing that potassium steel is each
Under the premise of item performance indicator meets requirement, production cost is reduced.
To achieve the above object, the invention adopts the following technical scheme:
A kind of low-temperature storage tank potassium steel, including component and its mass percent are as follows: C 0.2~0.55%, Si 0.1~
0.8%, Mn 20~26%, P≤0.02%, S≤0.01%, Al 1~3%, Cu 0.1~1%, V 0.01~0.08%, Ti
0.05~0.15%, Cr 2~4, surplus are Fe and inevitable impurity.
The low-temperature storage tank potassium steel, including component are preferred by mass percentage are as follows: C 0.2~0.4%, Si 0.3
~0.5%, Mn 22~26%, P≤0.01%, S≤0.01%, Al 1~2%, Cu 0.5~0.8%, V 0.02~
0.05%, Ti 0.08~0.1%, Cr 2~3, surplus are Fe and inevitable impurity.
The low-temperature storage tank potassium steel, room temperature texture is pure austenite, and austenite grain size is 6~20 μm
(average grain size is about 9 μm)；Its room temperature lower yield strength is 381~469MPa, and tensile strength is 800~980MPa, is stretched
Long rate is 60~83%, and ballistic work is 182~245J；Yield strength at -196 DEG C is 600~749MPa, and tensile strength is
1180~1350MPa, elongation are 50~75%, and ballistic work is 110~148J；Its welding point room-temperature yield strength is 370
~452MPa, tensile strength are 601~800MPa, and elongation is 30~43%, and ballistic work is 160~216J；At -196 DEG C
Ballistic work is 90~130J.
The preparation method of low-temperature storage tank of the invention potassium steel follows the steps below:
(1) melting is carried out at component selections raw material according to setting, and is cast into steel ingot；
(2) steel ingot is hot-forged after 1150~1250 DEG C of 2~4h of Homogenization Treatments in 1100~950 DEG C, forms forging stock；
(3) forging stock is rolled into the hot rolling of 12~50mm thickness in 1100~900 DEG C after 1150~1250 DEG C of 1~2h of heat preservation
Plate, the hot rolled plate after cooling, obtained low-temperature storage tank potassium steel.
In the step (3), the type of cooling of hot rolled plate is ultrafast cold (>=100 DEG C/s), and percentage pass reduction is little
In 30%.
Beneficial effects of the present invention:
(1) potassium steel ingredient of the invention is simple, at low cost, especially when its manufacture for being applied to low-temperature storage tank replaces
When 9%Ni steel, cost will be greatly reduced.
(2) it does not need to be heat-treated using the hot rolled steel plate that preparation method of the invention obtains, may be directly applied to
The manufacture of low-temperature storage tank.
(3) the low-temperature storage tank potassium steel room temperature texture that the present invention obtains is pure austenite, and austenite grain is uniformly thin
It is small.
(4) the low-temperature storage tank potassium steel good mechanical properties that the present invention obtains, meet low temperature requirement.
(5) low-temperature storage tank that the present invention obtains also has good weldering with potassium steel in addition to excellent mechanical property
Connecing property, corrosion resistance and fatigue performance.
Detailed description of the invention:
Fig. 1 is the metallographic structure photo of low-temperature storage tank potassium steel prepared by the embodiment of the present invention 1；
Fig. 2 is the XRD diagram of low-temperature storage tank potassium steel prepared by the embodiment of the present invention 1；
Fig. 3 is the SEM figure of low-temperature storage tank potassium steel low temperature (- 196 DEG C) stretching fracture prepared by the embodiment of the present invention 1；
Fig. 4 is the SEM figure of low-temperature storage tank potassium steel low temperature (- 196 DEG C) impact fracture prepared by the embodiment of the present invention 1.
Specific embodiment:
Below with reference to embodiment, the present invention is described in further detail.
Embodiment 1
The low-temperature storage tank potassium steel of the present embodiment, ingredient is by mass percentage are as follows: C 0.2%, Si 0.5%, Mn
26%, P≤0.01%, S≤0.01%, Al 1%, Cr 2%, surplus are Fe and inevitable impurity.
The preparation method of the low-temperature storage tank potassium steel of the present embodiment, follows the steps below:
(1) melting is carried out at component selections raw material according to setting, and is cast into the steel ingot of 39kg.
(2) steel ingot is after 1150 DEG C of Homogenization Treatments 2h, in 1100~950 DEG C of hot forgings at the side of 70 × 70 × 1000mm
Base.
(3) forging stock is rolled into the steel plate of 12mm thickness in 1100~900 DEG C, protects in the operation of rolling after 1200 DEG C of heat preservation 1h
It demonstrate,proves percentage pass reduction and is not more than 30%, hot rolled plate is cooled to room temperature using ultrafast cold (>=100 DEG C/s), low-temperature storage tank is made and uses
Potassium steel.
Metallographic observation is carried out with potassium steel to low-temperature storage tank and XRD is tested, gained metallographic structure photo is as shown in Figure 1, XRD
Figure is as shown in Figure 2.The result shows that low-temperature storage tank with potassium steel is single phase austenite tissue in the present embodiment, and austenite grain
It is uniformly tiny.
Embodiment 2
The low-temperature storage tank potassium steel of the present embodiment, ingredient is by mass percentage are as follows: C 0.2%, Si 0.5%, Mn
26%, P≤0.01%, S≤0.01%, Al 1%, Cu 0.5%, V 0.02%, Ti 0.08%, Cr 2%, surplus be Fe and
Inevitable impurity.
The preparation method of the low-temperature storage tank potassium steel of the present embodiment, follows the steps below:
(1) melting is carried out at component selections raw material according to setting, and is cast into the steel ingot of 39kg.
(2) square billet that steel ingot is hot-forged in 1100~950 DEG C into 70 × 70 × 1000mm after 1150 DEG C of Homogenization Treatments 2h.
(3) forging stock is rolled into the steel plate of 12mm thickness after 1200 DEG C of heat preservation 1h in 1100~900 DEG C, guarantees in the operation of rolling
Percentage pass reduction is not more than 30%, and hot rolled plate is cooled to room temperature using ultrafast cold (>=100 DEG C/s), it is high that low-temperature storage tank is made
Manganese steel.
Embodiment 3
The low-temperature storage tank potassium steel of the present embodiment, ingredient is by mass percentage are as follows: C 0.3%, Si 0.5%, Mn
26%, P≤0.01%, S≤0.01%, Al 1%, Cu 0.5%, V 0.05%, Ti 0.1%, surplus is for Fe and unavoidably
Impurity.
The preparation method of the low-temperature storage tank potassium steel of the present embodiment, follows the steps below:
(1) melting is carried out at component selections raw material according to setting, and is cast into the steel ingot of 39kg.
(2) square billet that steel ingot is hot-forged in 1100~950 DEG C into 70 × 70 × 1000mm after 1150 DEG C of Homogenization Treatments 4h.
(3) forging stock is rolled into the steel plate of 12mm thickness after 1200 DEG C of heat preservation 2h in 1100~900 DEG C, guarantees in the operation of rolling
Percentage pass reduction is not more than 30%, and hot rolled plate is cooled to room temperature using ultrafast cold (>=100 DEG C/s), it is high that low-temperature storage tank is made
Manganese steel.
Embodiment 4
The low-temperature storage tank potassium steel of the present embodiment, ingredient is by mass percentage are as follows: C 0.3%, Si 0.3%, Mn
26%, P≤0.01%, S≤0.01%, Al 2%, Cu 0.8%, V 0.05%, Ti 0.1%, Cr 3%, surplus be Fe and
Inevitable impurity.
The preparation method of the low-temperature storage tank potassium steel of the present embodiment, follows the steps below:
(1) melting is carried out at component selections raw material according to setting, and is cast into the steel ingot of 39kg.
(2) steel ingot is after 1200 DEG C of Homogenization Treatments 2h, in 1100~950 DEG C of hot forgings at the side of 70 × 70 × 1000mm
Base.
(3) forging stock is rolled into the steel plate of 12mm thickness in 1100~900 DEG C, protects in the operation of rolling after 1200 DEG C of heat preservation 2h
It demonstrate,proves percentage pass reduction and is not more than 30%, hot rolled plate is cooled to room temperature using ultrafast cold (>=100 DEG C/s), low-temperature storage tank is made and uses
Potassium steel.
Embodiment 5
The low-temperature storage tank potassium steel of the present embodiment, ingredient is by mass percentage are as follows: C 0.3%, Si 0.5%, Mn
24%, P≤0.01%, S≤0.01%, Al 2%, Cu 0.8%, V 0.05%, Ti 0.1%, Cr 2%, surplus be Fe and
Inevitable impurity.
The preparation method of the low-temperature storage tank potassium steel of the present embodiment, follows the steps below:
(1) melting is carried out at component selections raw material according to setting, and is cast into the steel ingot of 39kg.
(2) steel ingot is after 1150 DEG C of Homogenization Treatments 4h, in 1100~950 DEG C of hot forgings at the side of 70 × 70 × 1000mm
Base.
(3) forging stock is rolled into the steel plate of 12mm thickness in 1100~900 DEG C, protects in the operation of rolling after 1200 DEG C of heat preservation 2h
It demonstrate,proves percentage pass reduction and is not more than 30%, hot rolled plate is cooled to room temperature using ultrafast cold (>=100 DEG C/s), low-temperature storage tank is made and uses
Potassium steel.
The mechanical property of the low-temperature storage tank prepared in Examples 1 to 5 potassium steel is tested, wherein tension test is pressed
GB/T 228-2002 (metal material tensile testing at ambient temperature) and GB/T 13239-2006 (metal material cryogenic tensile test
Method) it carries out, impact test is carried out by GB/T 229-2007 (metal material Charpy pendulum impact test method), obtained knot
Fruit is as shown in table 1.In addition, the low-temperature storage tank prepared in embodiment 1 potassium steel cryogenic tensile fracture SEM figure as shown in figure 3,
The SEM figure of impact fracture is as shown in Figure 4.
The stretching and impact test data of the low-temperature storage tank potassium steel of 1 Examples 1 to 5 of table preparation
As can be seen from Table 1, potassium steel of the invention, between 381~469MPa, tensile strength is greater than yield strength
800MPa, elongation are greater than 60%, and -196 DEG C of ballistic works are greater than 110J.In addition, by Fig. 3~4 it is found that potassium steel of the invention is low
Temperature stretches and the fracture mode of impact is ductile rupture.It can be seen that potassium steel of the invention has good mechanical property,
It can be used for the manufacture of low-temperature storage tank.
The welding performance of the low-temperature storage tank prepared in Examples 1 to 5 potassium steel is tested, welding method TIG
Weldering.The mechanical property of butt-welding fitting is tested, and wherein (the welding point tension test side GB/T 2651-2008 is pressed in tension test
Method) it carries out, impact test is carried out by GB/T 2650-2008 (welding point impact test method), and impact specimen laterally samples,
Notch obtains that the results are shown in Table 2 in commissure.
The stretching and impact test data of the low-temperature storage tank prepared in 2 Examples 1 to 5 of table potassium steel weldment
As can be seen from Table 2, potassium steel weldment of the present invention, yield strength are greater than 370MPa, and tensile strength is greater than
601MPa, elongation are greater than 30%, and -196 DEG C of ballistic works are greater than 90J, have good mechanical property, meet service demand.
Claims (4)
1. a kind of low-temperature storage tank potassium steel, which is characterized in that including component and its mass percent are as follows: C 0.2~0.55%,
Si0.1~0.8%, Mn 20~26%, P≤0.02%, S≤0.01%, Al 1~3%, Cu 0.1~1%, V 0.01~
0.08%, Ti0.05~0.15%, Cr 2~4, surplus are Fe and inevitable impurity.
2. a kind of low-temperature storage tank potassium steel according to claim 1, which is characterized in that its room temperature texture is pure Ovshinsky
Body, and austenite grain size is 6~20 μm；Its room temperature lower yield strength be 381~469MPa, tensile strength be 800~
980MPa, elongation are 60~83%, and ballistic work is 182~245J；Yield strength at -196 DEG C is 600~749MPa, is resisted
Tensile strength is 1180~1350MPa, and elongation is 50~75%, and ballistic work is 110~148J；Its welding point room temperature yield is strong
Degree is 370~452MPa, and tensile strength is 601~800MPa, and elongation is 30~43%, and ballistic work is 160~216J；-196
DEG C when ballistic work be 90~130J.
3. a kind of preparation method of low-temperature storage tank potassium steel described in claim 1, which comprises the following steps:
(1) melting is carried out at component selections raw material according to setting, and is cast into steel ingot；
(2) steel ingot is hot-forged after 1150~1250 DEG C of 2~4h of Homogenization Treatments in 1100~950 DEG C, forms forging stock；
(3) forging stock is rolled into the hot rolled plate of 12~50mm thickness, institute in 1100~900 DEG C after 1150~1250 DEG C of 1~2h of heat preservation
The hot rolled plate stated after cooling, obtained low-temperature storage tank potassium steel.
4. a kind of preparation method of low-temperature storage tank potassium steel according to claim 3, which is characterized in that the step
(3) in, the type of cooling of hot rolled plate is ultrafast cold (>=100 DEG C/s), and percentage pass reduction is not more than 30%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910030870.6A CN109609853A (en) | 2019-01-14 | 2019-01-14 | A kind of high manganese steel for low temperature storage tank and preparation method thereof |
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| CN201910030870.6A CN109609853A (en) | 2019-01-14 | 2019-01-14 | A kind of high manganese steel for low temperature storage tank and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266758A (en) * | 2021-06-15 | 2021-08-17 | 荆门宏图特种飞行器制造有限公司 | Low-temperature storage tank |
| CN113941833A (en) * | 2021-11-12 | 2022-01-18 | 荆门宏图特种飞行器制造有限公司 | Manufacturing process of high manganese steel material shell ring |
| CN116121662A (en) * | 2023-04-17 | 2023-05-16 | 太原科技大学 | High-manganese steel for high-vanadium low-temperature storage tanks and its two-stage controlled cooling preparation method |
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| CN104583439A (en) * | 2012-08-23 | 2015-04-29 | 株式会社神户制钢所 | Thick steel plate having good ultralow-temperature toughness |
| CN107177786A (en) * | 2017-05-19 | 2017-09-19 | 东北大学 | The design and its manufacture method of a kind of high manganese cut deal of LNG storage tank |
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2019
- 2019-01-14 CN CN201910030870.6A patent/CN109609853A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104583439A (en) * | 2012-08-23 | 2015-04-29 | 株式会社神户制钢所 | Thick steel plate having good ultralow-temperature toughness |
| CN107177786A (en) * | 2017-05-19 | 2017-09-19 | 东北大学 | The design and its manufacture method of a kind of high manganese cut deal of LNG storage tank |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266758A (en) * | 2021-06-15 | 2021-08-17 | 荆门宏图特种飞行器制造有限公司 | Low-temperature storage tank |
| CN113941833A (en) * | 2021-11-12 | 2022-01-18 | 荆门宏图特种飞行器制造有限公司 | Manufacturing process of high manganese steel material shell ring |
| CN116121662A (en) * | 2023-04-17 | 2023-05-16 | 太原科技大学 | High-manganese steel for high-vanadium low-temperature storage tanks and its two-stage controlled cooling preparation method |
| CN116121662B (en) * | 2023-04-17 | 2023-09-26 | 太原科技大学 | High-manganese steel for high-vanadium low-temperature storage tank and two-stage controlled cooling preparation method thereof |
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Application publication date: 20190412 |