CN104846291B - A kind of high-strength corrosion-resistant stainless steel, stainless steel tubing and casing and its manufacture method - Google Patents
A kind of high-strength corrosion-resistant stainless steel, stainless steel tubing and casing and its manufacture method Download PDFInfo
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Abstract
The invention discloses a kind of high-strength corrosion-resistant stainless steel, its chemical element mass percent is：C：≤ 0.1%, Si：0.1~0.5%, Mn：0.1~5%, Cr：16.5~25.0%, Ni：8.0~20.0%, Mo：0.1~5%, Al：0.01~0.10%, Cu：0.30~0.45%, N：0.01~0.3%, RE：0.05~0.10%, surplus is Fe and other inevitable impurity.The invention also discloses stainless steel tubing and casing made from any one stainless steel as the present invention.The present invention discloses a kind of manufacture method of stainless steel tubing and casing again, and it includes step：1) smelt and casting obtains pipe；2) by heating of pipe blank；3) tubulation；4) heat treatment and 5) cold rolling.The high-strength corrosion-resistant stainless steel of the present invention and the anti-CO of stainless steel tubing and casing2Corrosive nature and anti-acid corrosion performance are good.
Description
Technical field
The present invention relates to a kind of steel, more particularly to a kind of stainless steel.The invention further relates to one kind by the stainless steel
Tubing and casing made of material and its manufacture method.
Background technology
Oil pipe is the pipeline for being used to for oil or natural gas to be delivered to ground from reservoir in oil, gas exploitation course,
Sleeve pipe is located on the outside of oil pipe, and it plays a part of supporting stratum, protection oil pipe.Due to the often H containing high concentration in reservoir2S、
CO2, in addition to requiring oil pipe and sleeve pipe is respectively provided with corresponding intensity, impact property, also require that both have certain anti-H2S/
CO2Corrosive nature.In recent years, deepening continuously with highly corrosive exploitation of oil-gas field, to oil, the anti-H of sleeve pipe2S、CO2Corrosivity
Higher requirement can be generated.
Publication No. CN101815802A, publication date are August in 2010 25, entitled " high strength Cr-Ni alloy materials
And using its oil well with seamless pipe " Chinese patent literature disclose a kind of high strength Cr-Ni alloy materials and by this
Oil well seamless pipe made of material, the oil well are with the weight/mass percentage composition (wt.) of each chemical element in seamless pipe：C：
Less than 0.05%, Si：0.05~1.0%, Mn：0.01% ＜ Mn ＜ 3.0%, P：Less than 0.05%, S：Less than 0.005%, Cu：
0.01~4%, Ni：25% ＜ Ni ＜ 35%, Cr：20~30%, Mo：0.01% ＜ Mo ＜ 4.0%, N：0.10~0.30%,
Al：0.03~0.30%, O (oxygen)：Less than 0.01%, REM (rare earth element)：0.01~0.20%, surplus be Fe and other not
Evitable impurity, and above-mentioned each chemical element meets the condition of following formula (1), and formula (1) is N × P/REM≤0.40.
Publication No. JP2290920A, publication date are November 30 nineteen ninety, a kind of entitled " high strength dual phase stainless steel
The Japanese documentation of pipe manufacturing method " discloses a kind of duplex phase stainless tube, the weight/mass percentage composition of its each chemical element
(wt.%) it is：C：0.01~0.10%, Si：0.01~1.0%, Mn：0.3~1.8%, P≤0.01%, S≤0.003%, Cr
21~27%, Ni 3~9%, Mo 2~4%, N0.1~0.3%.
Publication No. JP2009068518A, publication date are on October 28th, 2009, a kind of entitled " resisting sulfide stress
The Japanese documentation of the high-strength stainless steel steel pipe of cracking and high temperature resistance CO2 excellent performances " also discloses that a kind of martensite+iron
Ferritic two phase stainless steel steel pipe, the weight/mass percentage composition (wt.%) of its each chemical element are：C≤0.05%, Si≤1%, Mn≤
1%, P≤0.05%, S≤0.002%, Cr：16~18%, Ni：3~5%, Mo：2~3%, Al：0.001~0.10%, N≤
0.05%, its microstructure is the ferrite retained austenite below+10% of martensite+10~40%.
The content of the invention
It is an object of the invention to provide a kind of high-strength corrosion-resistant stainless steel, the intensity of the stainless steel is high, and has
Excellent anti-CO2Corrosive nature and anti-acid corrosion performance.In addition, the high-strength corrosion-resistant stainless steel is also equipped with excellent weldering
Connect performance.
To achieve these goals, the present invention, which proposes one kind, has high-strength corrosion-resistant stainless steel, its chemical element matter
Measuring degree is：
C：≤ 0.1%,
Si：0.1~0.5%,
Mn：0.1~5%,
Cr：16.5~25.0%,
Ni：8.0-20.0%
Mo：0.1~5%,
Al：0.01~0.10%,
Cu：0.30~0.45%,
N：0.01~0.3%
RE：0.05~0.10%,
Surplus is Fe and other inevitable impurity.
The design principle of each chemical element in high-strength corrosion-resistant stainless steel of the present invention is：
Carbon：C addition can effectively improve the intensity of steel grade, and still, C content is too high easily to cause alloying element carbonization
Thing separates out in crystal boundary, the appearance of crystal boundary part Cr-depleted region is caused, so as to cause the decline of steel grade mechanical property and corrosion resistance.
For technical scheme, C is relict element, and it should be controlled more low better, however, C content is controlled
Must be infinitely low, production cost can be greatly increased.Therefore, by the C content in high-strength corrosion-resistant stainless steel of the present invention
It is set as≤0.1wt.%.
Silicon：Si is effective deoxidier.In order to improve the intensity of steel grade, it is necessary to add a certain amount of Si elements, still, mistake
More Si can cause the reduction of steel toughness, meanwhile, it is also easy to cause the precipitation of equal harmful second phases of the σ in steel.In view of
This, is 0.1wt.% by the lower limit design of Si contents in high-strength corrosion-resistant stainless steel of the present invention, and by its upper limit
It is designed as 0.5wt.%.
Manganese：Mn is the formation element of austenite, and it can improve the solubility of N in steel so as to improve steel grade intensity and tough
Property.In addition, Mn is also effective deoxidier, it can play a part of de- S.But excessive Mn can also promote carbide
Formed, so as to reduce the toughness of steel grade and corrosion resistance.Therefore, by the Mn in high-strength corrosion-resistant stainless steel of the present invention
Content be set as 0.1~5wt.%.
Chromium：Anti- the local corrosion ability and homogeneous corrosion ability of steel grade can be significantly increased in addition Cr, still, too high
Cr will cause the formation of high temperature ferrite or equal harmful second phases of σ, and the presence of second phase will cause steel grade anti-acid
The decline of performance and anti-SCC energy.Thus, it is desirable to the Cr contents in the high-strength corrosion-resistant stainless steel of the present invention are set as
16.5~25.0wt.%.
Nickel：Ni is the formation element of austenite, and it can improve the anti-SCC energy of steel grade and anti-local corrosion performance, but
It is that the Ni of too high amount can not only reduce the work hardening ability of steel grade, and steel grade cost can also be significantly increased.Therefore, will
The weight/mass percentage composition control of Ni in the present invention is 8.0~20.0%.
Molybdenum：Mo can effectively improve steel grade in high Cl-Anti- spot corrosion, anti-crevice corrosion behavior and anti-SCC in environment
Energy.But Mo is ferrite former, the excessive Mo of content will cause the shape of high temperature ferrite or equal harmful second phases of σ
Into the presence of the second phase will cause the decline of steel grade corrosion resistance and anti-SCC energy., should based on technical scheme
It is 0.1-5.0wt.% when Mo contents are controlled.
Aluminium：Al is effective deoxidier, and it is the alloying element being difficult to avoid that in steelmaking process.In the technical side of the present invention
In case, once Al content will destroy the toughness and hot-workability of steel grade more than 0.10wt.%.Therefore, it is of the present invention
Al content in high-strength corrosion-resistant stainless steel needs to be set between 0.01~0.10wt.% scopes.
Copper：Xiang Gangzhong addition Cu elements are favorably improved the corrosion resistance of steel grade.In addition, Cu is also the formation of austenite
Element.However, too high Cu contents can reduce the work hardening ability of steel grade.Therefore, the high-strength corrosion-resistant of the present invention is stainless
It is 0.30%~0.45% that the weight/mass percentage composition of Cu in steel, which needs to control,.
Nitrogen:N addition can improve the corrosion resistance of steel grade, meanwhile, N can also suppress the precipitation of the equal harmful phases of σ.
However, the defects of too high N will cause to produce stomata in ingot casting, at the same time it also is possible to cause the precipitation of other harmful phases.Therefore
And the content control of the N in high-strength corrosion-resistant stainless steel of the present invention is 0.01~0.30wt.%.
Rare earth element：RE addition can effectively improve the toughness of steel grade.For technical scheme, when
When rare earth elements RE content is more than 0.10wt.%, then the welding performance of steel grade can be reduced.Thus, of the present invention high-strength
Spend in anticorrosive stainless steel, the content of rare earth elements RE is controlled between 0.05%~0.10% scope.
Inevitable impurity element in high-strength corrosion-resistant stainless steel of the present invention is mainly P and S, both
Impurity element needs to control more low better.
Further, high-strength corrosion-resistant stainless steel of the present invention also have 0 ＜ Nb≤0.1wt%, 0 ＜ V≤
At least one of 0.1wt% and 0 ＜ Ti≤0.1wt%.
Nb, V, Ti and C, N have strong binding ability, and Nb, V, Ti can form respective carbide, nitridation with C, N
Thing or carbonitride, such compound are favorably improved the mechanical property of steel grade.In addition, Ti can also strengthen the anticorrosive of steel grade
Performance.But for technical scheme, will when one of Nb, V, Ti content are more than 0.1wt.%
So that the particle of precipitated phase is thick, and causes the oxide in steel is mingled with to increase, the intensity of steel is destroyed on the contrary；Meanwhile
The welding performance of steel grade can also be reduced.So the content of Nb, V, Ti in high-strength corrosion-resistant stainless steel of the present invention are equal
It must not exceed 0.1wt.%.
Further, high-strength corrosion-resistant stainless steel of the present invention also has W：0.01~2.00%.
W addition is favorably improved the resistance against sulfide stress cracking performance of steel grade, meanwhile, W elements can also be carried effectively
The mechanical behavior under high temperature of high steel grade.Therefore, the content of the W in the high-strength corrosion-resistant stainless steel of the present invention is set as 0.01~
2.00wt.%.
It is further preferred that in high-strength corrosion-resistant stainless steel of the present invention, Si element content ranges are entered one
Step is defined to 0.1~0.25wt%.
It is further preferred that in high-strength corrosion-resistant stainless steel of the present invention, Mn element content ranges are entered one
Walk as 0.5~1.2wt%.
Further, the microstructure of high-strength corrosion-resistant stainless steel of the present invention is homogeneous austenite structure,
And very small amount σ phases and other precipitated phases.
σ phases are that one kind relatively conventional in stainless steel and nickel-base alloy is harmful to the second phase, are a kind of intermetallic compounds, its
In the presence of the toughness, ductility and corrosion resistance of alloy will be had a strong impact on.
Compared to martensitic stain less steel of the prior art and two phase stainless steel, the high intensity with above-mentioned microstructure resists
The characteristics of corrosion stainless steel possesses high intensity and intensity controlled by precipitation strength and working hardening steel grade, meanwhile, may be used also
Varying strength is reached to meet different strength demands with the control by postorder cold-rolling process.In addition, with above-mentioned microcosmic group
The high-strength corrosion-resistant stainless steel knitted possesses more excellent corrosion resistance, and it is possessing excellent anti-CO2Corrosive nature
Meanwhile also stainless steel is caused to possess excellent anti-acid corrosion performance.Therefore, due to possessing above-mentioned microstructure, this hair
The anti-acid performance of bright high-strength corrosion-resistant stainless steel improves than the anti-acid performance of martensitic stain less steel and two phase stainless steel
More than 10 times.
Further, the grain size of above-mentioned austenite structure is 5-8 levels.
Further, above-mentioned σ phases content is less than 0.5%.
Further, other above-mentioned precipitated phases include metal carbides and high temperature ferrite, and the total amount of the precipitated phase is low
In 1%.In the technical program, precipitated phase belongs to harmful phase, it is therefore desirable to controls its content.
Another object of the present invention is to provide a kind of stainless steel tubing and casing, the stainless steel tubing and casing has higher strong
Degree, and the stainless steel oil pipe is also equipped with excellent anti-CO2Corrosive nature and anti-acid corrosion performance.The stainless steel tubing and casing
It is suitable for oil, natural gas extraction field.
To achieve these goals, stainless steel tubing and casing of the present invention is by any one high intensity referred to above
Anticorrosive stainless steel is made.
Correspondingly, present invention also offers the manufacture method of above-mentioned stainless steel tubing and casing, the manufacture method includes following step
Suddenly：
(1) smelt and casting obtains pipe；
(2) by heating of pipe blank；
(3) tubulation；
(4) it is heat-treated；
(5) cold rolling.
Further, in the manufacture method of stainless steel tubing and casing of the present invention, use and wear in above-mentioned steps (3)
Hole+hot rolling technology.
Further, in the manufacture method of stainless steel tubing and casing of the present invention, using heat in above-mentioned steps (3)
Extrusion process.
Further, in the manufacture method of stainless steel tubing and casing of the present invention, in above-mentioned steps (4), use
The heat treatment mode of solution treatment, to make the microstructure of stainless steel tubing and casing be changed into single solid solution state austenite structure,
And eliminate harmful second phase constitution formed in hot procedure early stage.
Further, in the manufacture method of stainless steel tubing and casing of the present invention, the temperature of above-mentioned solution treatment
For 980-1200 DEG C.
Further, in the manufacture method of stainless steel tubing and casing of the present invention, in above-mentioned steps (2), will manage
Base is heated to more than austenitizing temperature.
High-strength corrosion-resistant stainless steel of the present invention has good corrosion resistance.Especially, the high intensity resists
Corrosion stainless steel has excellent anti-CO2Corrosive nature and anti-acid corrosion performance.Compared to existing martensitic stain less steel
And two phase stainless steel, the anti-acid performance of the high-strength corrosion-resistant stainless steel improve more than 10 times.
In addition, high-strength corrosion-resistant stainless steel of the present invention has higher intensity, and strength range covering is wide,
Its strength range is 80ksi-135ksi.
In addition, high-strength corrosion-resistant stainless steel of the present invention also possesses good welding performance.
Stainless steel tubing and casing of the present invention has higher intensity, and its strength range is 80ksi-135ksi, (i.e.
552MPa-965MPa) and the stainless steel tubing and casing has excellent anti-CO2Corrosive nature and anti-acid corrosion performance etc. are comprehensive
Close etch resistant properties.
Meanwhile acquisition intensity height, anti-CO can be produced by the manufacture method of stainless steel tubing and casing of the present invention2It is rotten
Corrosion can good, anti-acid corrosion excellent performance and the good stainless steel tubing and casing of welding performance.
Brief description of the drawings
Fig. 1 shows this case embodiment A6 microstructure.
Embodiment
Below in conjunction with specific embodiments to high-strength corrosion-resistant stainless steel of the present invention, stainless steel tubing and casing and
Its manufacture method makes further explanation, however, the explanation and illustration is not formed not to technical scheme
Work as restriction.
Manufacture the stainless steel tubing and casing in embodiment A1-A7 as steps described below, the stainless steel oil jacket in embodiment A1-A7
The mass percent such as content of each chemical element of pipe and the stainless steel tube in comparative example B1 and B2 is as shown in table 1：
(1) smelt：Using electric arc furnaces or converter+secondary refining process, control the proportioning of each chemical element as shown in table 1；
(2) continuous casting obtains pipe；
(3) by heating of pipe blank：Using rotary heating furnace by more than heating of pipe blank to austenitizing temperature；
(4) tubulation：Seamless semifinished tube is formed using perforation+hot rolling technology or hot extrusion technique；
(5) it is heat-treated：Using the heat treatment mode of solution treatment, the temperature of solution treatment is 980-1200 DEG C, so that not
Microstructure in rust steel tubing and casing is changed into single solid solution state austenite structure and eliminates what is formed in hot procedure early stage
Second phase constitution；
(6) cold rolling：Semifinished tube is set to reach required intensity using cold deformation mode.
Specific process parameter in each step involved by above-mentioned manufacture method is referring particularly to table 2.
Table 1 lists the mass percentage content for each chemical element being made in embodiment A1-A7 and comparative example B1-B2.
Table 1. (wt.%, surplus are Fe and other inevitable impurity)
| Sequence number | C | Si | Mn | Cr | Ni | Mo | Al | Cu | N | RE | Nb | V | Ti | W |
| A1 | 0.03 | 0.25 | 1.5 | 18.1 | 8.0 | 0.15 | 0.05 | 0.45 | 0.01 | 0.07 | 0.04 | 0.02 | 0 | 0.05 |
| A2 | 0.08 | 0.21 | 5.00 | 22.7 | 20.0 | 4.25 | 0.03 | 0.30 | 0.12 | 0.09 | 0 | 0.03 | 0.01 | 1.20 |
| A3 | 0.02 | 0.15 | 0.28 | 15.9 | 10.2 | 3.14 | 0.01 | 0.40 | 0.07 | 0.05 | 0.04 | 0.01 | 0 | 0.75 |
| A4 | 0.04 | 0.18 | 2.70 | 24.1 | 19.2 | 4.87 | 0.10 | 0.31 | 0.30 | 0.05 | 0.07 | 0 | 0.03 | 1.38 |
| A5 | 0.05 | 0.20 | 3.5 | 19.7 | 15.0 | 2.70 | 0.02 | 0.42 | 0.13 | 0.06 | 0 | 0.02 | 0 | 2.0 |
| A6 | 0.06 | 0.18 | 1.05 | 17.3 | 19.5 | 2.50 | 0.10 | 0.40 | 0.05 | 0.07 | 0 | 0.05 | 0 | 0.17 |
| A7 | 0.09 | 0.20 | 4.95 | 21.4 | 16.7 | 1.84 | 0.01 | 0.37 | 0.09 | 0.09 | 0.05 | 0 | 0.05 | 0.63 |
| B1 | 0.10 | 0.20 | 1.20 | 22.3 | 5.15 | 2.50 | 0.04 | 0.40 | 0.26 | 0.05 | 0.06 | 0 | 0.03 | 1.59 |
| B2* | 0.008 | 0.27 | 0.98 | 13.2 | 5.5 | 2.30 | 0.027 | 0.01 | 0.03 | 0 | 0 | 0 | 0 | 1.0 |
* note：B2 is the stainless steel tube made of martensitic stain less steel, reaches target strength by quenching+tempering, without cold
Deformation.
Table 2 lists the technological parameter of embodiment A1-A7 and comparative example B1-B2 manufacture method.
Table 2.
* note：B2 is the stainless steel tube made of martensitic stain less steel, reaches target strength by quenching+tempering, without cold
Deformation.
After the stainless steel tube sampling of stainless steel tubing and casing and comparative example B1-B2 in embodiment A1-A7, room temperature tensile is carried out
V breach charpy impact tests at experiment and -10 DEG C, the mechanical property for detecting to obtain is listed in Table 6 below.
Using Dynamic Corrosion weight-loss method to the stainless steel tubing and casing and comparative example B1-B2 in the embodiment A1-A7 after sampling
Stainless steel tube, carry out anti-CO2Corrosive nature is tested, and detailed experimental condition and solution medium composition is shown in Table 3 and table 4, test knot
Fruit is listed in Table 6 below.
Using static corrosion weight-loss method to the stainless steel tubing and casing and comparative example B1- in the embodiment A1-A7 after sampling
B2 stainless steel tube, anti-acid corrosion performance test being carried out, detailed experimental condition and solution medium composition is shown in as shown in table 5,
Test result is listed in Table 6 below.
Table 3 lists anti-CO2The experimental condition of corrosive nature test.
Table 3.
Table 4 lists anti-CO2The solution medium composition (mg/L) of corrosive nature test.
Table 4.
| Ion | K++Na+ | Mg2+ | Ca2+ | Cl- | SO4 2- | HCO3 - | CO3 2- | Total salinity |
| Concentration | 18872 | 86 | 142 | 27632 | 1334 | 500 | 111 | 48677 |
Table 5 lists the experimental condition of anti-acid corrosion performance test.
Table 5.
Table 6 lists every mechanics of the stainless steel tube of the stainless steel tubing and casing and comparative example B1-B2 in embodiment A1-A7
Performance parameter.
Table 6.
As can be seen from Table 6, stainless steel tubing and casing of the present invention has higher intensity and good impact flexibility,
Its intensity rank has reached 80ksi-135ksi.In anti-CO2In corrosive nature test, the stainless steel oil jacket in embodiment A1-A7
The corrosion rate of pipe is less than the corrosion rate of the stainless steel tube in comparative example B1 and B2, and spot corrosion situation does not occur.Anti-
In the test of acidifying solution corrosive nature, the corrosion rate of the stainless steel tubing and casing in embodiment A1-A7 well below comparative example B1 and
The corrosion rate of stainless steel tube in B2, meanwhile, there is not spot corrosion situation yet, wherein, embodiment A6 corrosion rate is almost
Only the 1/10 of comparative example B2 corrosion rate, and embodiment A2 corrosion rate is about the 1/ of comparative example B1 corrosion rate
84.It is therefore, more excellent compared to comparative example B1 and B2, embodiment A1-A7 anti-acid corrosion performance.
Fig. 1 shows A6 of embodiment of the present invention metallographic structure.It can be seen that its microstructure is uniformly tiny
Austenite structure, almost without σ phases and precipitated phase.
It should be noted that listed above is only specific embodiment of the invention, it is clear that real the invention is not restricted to more than
Example is applied, the similar change for having many therewith.If those skilled in the art directly exported from present disclosure or
All deformations associated, all should belong to protection scope of the present invention.
Claims (9)
1. a kind of high-strength corrosion-resistant stainless steel, it is characterised in that its chemical element mass percentage content is：
C：≤ 0.1%,
Si：0.15~0.25%,
Mn：0.5~1.2%,
Cr：16.5~25.0%,
Ni：8.0~20.0%
Mo：0.1~5%,
Al：0.01~0.10%,
Cu：0.30~0.45%,
N：0.01~0.3%
RE：0.05~0.10%,
Surplus is Fe and other inevitable impurity；
The high-strength corrosion-resistant stainless steel microstructure is austenite structure, and very small amount σ phases and precipitated phase, wherein described
σ phases content is less than 0.5%；The grain size of the austenite structure is 5-8 levels.
2. high-strength corrosion-resistant stainless steel as claimed in claim 1, it is characterised in that also with 0 ＜ Nb≤0.1wt%, 0 ＜
At least one of V≤0.1wt% and 0 ＜ Ti≤0.1wt%.
3. high-strength corrosion-resistant stainless steel as claimed in claim 1, it is characterised in that also with W：0.01~2.00%.
4. high-strength corrosion-resistant stainless steel as claimed in claim 1, it is characterised in that the precipitated phase includes metal carbides
High temperature ferrite, the total amount of the precipitated phase are less than 1%.
5. use the stainless steel tubing and casing as made from any one high-strength corrosion-resistant stainless steel in claim 1-4.
6. the manufacture method of stainless steel tubing and casing as claimed in claim 5, it is characterised in that including step：
(1) smelt and casting obtains pipe；
(2) by heating of pipe blank；
(3) tubulation；
(4) it is heat-treated：Using the heat treatment mode of solution treatment, the temperature of the solution treatment is 980-1200 DEG C；
(5) cold rolling.
7. the manufacture method of stainless steel tubing and casing as claimed in claim 6, it is characterised in that used in the step (3)
Perforation+hot rolling technology.
8. the manufacture method of stainless steel tubing and casing as claimed in claim 6, it is characterised in that used in the step (3)
Hot extrusion technique.
9. the manufacture method of stainless steel tubing and casing as claimed in claim 6, it is characterised in that in the step (2), will manage
Base is heated to more than austenitizing temperature.
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| CN106555133B (en) * | 2015-09-24 | 2018-12-07 | 宝山钢铁股份有限公司 | A kind of high-strength corrosion-resistant stainless steel, tubing and casing and its manufacturing method |
| CN106555134B (en) * | 2015-09-24 | 2018-06-01 | 宝山钢铁股份有限公司 | A kind of anticorrosive stainless steel, tubing and casing and its manufacturing method |
| CN106636951A (en) * | 2016-11-10 | 2017-05-10 | 合肥辰泰安全设备有限责任公司 | Alloy material for spraying nozzle |
| CN106949318A (en) * | 2017-03-22 | 2017-07-14 | 南通盛立德金属材料科技有限公司 | A kind of Austenitic acid-resistant stainless steel pipe |
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| CN113564468B (en) * | 2021-07-15 | 2022-06-28 | 振石集团东方特钢有限公司 | Stainless steel for heating pipe of nickel-saving water heater and preparation process thereof |
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| CN116287948A (en) * | 2022-11-18 | 2023-06-23 | 烟台华新不锈钢有限公司 | Preparation method of stainless steel for high-pressure boiler |
| CN116179946A (en) * | 2023-02-01 | 2023-05-30 | 浙江久立特材科技股份有限公司 | High-strength CO-resistant material 2 Corrosion stainless steel, oil casing, preparation method and application thereof |
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| JP4494237B2 (en) * | 2005-02-02 | 2010-06-30 | 新日鐵住金ステンレス株式会社 | Austenitic stainless steel material excellent in corrosion resistance, toughness and hot workability, and method for producing the same |
| ES2714371T3 (en) * | 2009-04-01 | 2019-05-28 | Nippon Steel & Sumitomo Metal Corp | Method to produce a heavy duty seamless Cr-Ni alloy pipe |
| JP5500960B2 (en) * | 2009-12-01 | 2014-05-21 | 新日鐵住金ステンレス株式会社 | Fine grain austenitic stainless steel sheet with excellent stress corrosion cracking resistance and workability |
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2015
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