CN111715692B - Manufacturing method for producing thin and wide super austenitic stainless steel middle plate by composite pack rolling - Google Patents
Manufacturing method for producing thin and wide super austenitic stainless steel middle plate by composite pack rolling Download PDFInfo
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- CN111715692B CN111715692B CN202010598455.3A CN202010598455A CN111715692B CN 111715692 B CN111715692 B CN 111715692B CN 202010598455 A CN202010598455 A CN 202010598455A CN 111715692 B CN111715692 B CN 111715692B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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Abstract
The invention provides a method for manufacturing a thin and wide super austenitic stainless steel middle plate, which comprises the following steps: (1) superposing two intermediate blanks, and performing electron beam welding and compounding on four sides of the intermediate blanks in a vacuum chamber to obtain steel blanks; (2) rolling the steel billet by adopting a rolling procedure of firstly carrying out small rolling and then carrying out large rolling to obtain a composite steel plate; (3) and straightening and separating the composite steel plate. The stainless steel middle plate obtained by the method has excellent thickness precision, low oxidation degree of the separation surface and high roughness of a single-surface finished product, and can be used for high-end application.
Description
Technical Field
The invention belongs to the technical field of steel smelting, and particularly relates to a manufacturing method for producing a thin and wide super austenitic stainless steel middle plate by composite rolling.
Background
With the upgrading of demand ends of industries such as ship desulfurization, petrochemical industry and the like, the market demand on hot-rolled stainless medium plates, particularly stainless steel with special purposes such as dual-phase steel, super austenite and the like is gradually increased, the specification demand of users on the stainless medium plates is gradually enlarged, particularly the demand on medium plates with the thickness of less than or equal to 5mm and the width of more than 1800mm is sharply increased, such as S31254, S32750 and the like, but because the steel plates have larger rolling deformation resistance and narrow rolling process window, the single-sheet rolling thickness often exceeds the limit of a medium plate rolling mill, and the hit rate is lower.
Disclosure of Invention
Aiming at the defects, the invention provides a manufacturing method for producing a thin and wide super austenitic stainless steel middle plate by composite rolling, which solves the rolling production problem of the super austenitic stainless steel middle plate with the thickness less than or equal to 5mm and the width more than 1800mm by a composite rolling mode.
The invention realizes the above purposes by the following technical scheme:
a manufacturing method of a thin and wide super austenitic stainless steel middle plate comprises the following steps:
(1) superposing two intermediate blanks, and performing electron beam welding and compounding on four sides of the intermediate blanks in a vacuum chamber to obtain steel blanks;
(2) rolling the steel billet by adopting a rolling procedure of firstly carrying out small rolling and then carrying out large rolling to obtain a composite steel plate;
(3) and straightening and separating the composite steel plate.
Optionally, in step (1), the intermediate blank is subjected to a superimposed surface coating release agent.
Optionally, the release agent is a magnesium oxide release agent, and the coating amount of the magnesium oxide release agent is 110-130 g per square meter of the intermediate blank.
Optionally, polyvinyl alcohol is further added into the release agent, and the ratio of the polyvinyl alcohol to the coating of 10 grams per square meter of the intermediate blank is adjusted.
Optionally, in step (1), the vacuum degree of the vacuum chamber is less than 10-2And (6) handkerchief.
Optionally, in step (2), the rolling schedule of the first low reduction and the second high reduction is: the rolling is completed by adopting the rolling reduction not more than 3% in the first 2-3 passes, then adopting the rolling reduction of 10-20%, and adopting 14-16 passes in total.
Optionally, in the step (2), at the beginning of the rolling, the heating temperature is 1250-1290 ℃ and the heating time is 10-14 min/10 mm.
Optionally, in the step (2), the rolling temperature of the rolling is not lower than 880 ℃.
Optionally, in step (3), the straightening comprises a first straightening and a second straightening; the first straightening adopts coarse roller large deformation straightening, and the straightening rolling reduction is 5-6 mm; and the second straightening adopts a coarse roller and a fine roller to simultaneously straighten, and the straightening rolling reduction is 7-8 mm.
Optionally, in the step (3), the straightening pressure for straightening is 250-350 tons.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) at present, for the marks such as S31254, 904L, S32750 and the like with the thickness of less than or equal to 5mm and the width of more than 1800mm, because the capacity of a medium plate rolling mill is limited and the marks cannot be directly rolled, the production is carried out by adopting outsourcing processing or re-rolling processing, and certain problems (roll marks) exist in the aspects of production cost, production period and quality assurance.
(2) Due to the adoption of the pack rolling mode, the thickness precision after rolling is superior to the conventional rolling thickness precision, the difference between the thickness and the plate is half of the former thickness, the oxidation degree of the separation surface is low, the roughness level of a single-surface finished product is higher, and the use of high-end application is facilitated.
(3) For steel grades with high welding requirements such as super austenite S31254 and the like, the cost of adopting vacuum electron beam blank making is close to that of adopting conventional submerged arc welding vacuumizing blank making. The vacuum electron beam blank making is more excellent under the blank making quality condition, is not limited by welding materials, has stronger welding guarantee capability, comprehensively considers the optimization of vacuum electron beam welding, and has certain advantages in manufacturing cost:
a. compared with the conventional finished product rolling-changing process, the process is not limited by the cold rolling-changing capacity, has no quality defect of a roll mark of a roll, increases the blank manufacturing cost by 1800 yuan in cost, and reduces the cost of rolling-changing and one-time heat treatment acid pickling grinding by about 2600 yuan.
b. Compared with the conventional submerged arc welding blank making, the conventional submerged arc welding post-vacuumizing cost is as follows: 2050 yuan (chamfer cut by plasma, stainless steel welding material), vacuum electron beam welding cost: 1800 yuan (no welding material is needed).
Drawings
FIG. 1 is a process flow diagram of the manufacturing method of the thin and wide super austenitic stainless steel middle plate according to the invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention. The process of the present invention employs conventional methods or apparatus in the art, except as described below. The following noun terms have meanings commonly understood by those skilled in the art unless otherwise specified.
At present, in the production process of medium plate with thickness less than or equal to 5mm and width greater than 1800mm, because the steel plate has larger rolling deformation resistance and narrow rolling process window, the single rolling thickness often exceeds the limit of a medium plate rolling mill, and the hit rate is lower. In order to solve the problems, the inventor of the invention creatively provides a manufacturing method for producing a thin and wide super austenitic stainless steel middle plate by composite pack rolling through research. The method solves the rolling production problem of the super austenite medium plate with the thickness less than or equal to 5mm and the width more than 1800mm in a composite rolling mode.
The invention mainly comprises the following steps: the blank is manufactured by using a vacuum electron beam mode, so that the cost is reduced, and the blank manufacturing quality can be improved; by adopting a pack rolling mode and matching with a proper rolling schedule, the thickness precision of the obtained steel plate is superior to that of the conventional rolled thickness, meanwhile, the oxidation degree of the separation surface is low, the roughness level of a single-surface finished product is higher, and the use of high-end application is facilitated.
The manufacturing method of the invention is mainly used for manufacturing super austenitic stainless steel middle plates with the thickness of less than or equal to 5mm and the width of more than 1800mm, such as S31254, S32750 and the like. Table 1 below illustrates the composition of S31254 by way of example, but those skilled in the art will recognize that this is for illustrative purposes only and is not intended to be limiting.
Table 1: component S31254
Specifically, as shown in fig. 1, the manufacturing method of the composite pack rolling for producing the thin and wide super austenitic stainless steel middle plate comprises the following process steps:
(1) blank making
In the step, firstly, a separant is coated on the superposed surface of the intermediate blanks (namely the blanks), the moisture is evaporated, then the two intermediate blanks are superposed and placed in a vacuum chamber, and the four sides of the intermediate blanks are subjected to electron beam welding and compounding to obtain the billets.
The intermediate billet used in the manufacturing method is obtained by rolling a continuous casting billet by a roughing mill, and can be prepared by adopting a conventional process.
In order to ensure the welding quality, the clearance between two blanks of the billet obtained after blank making is less than 1.5mm, and the clearance between the blanks is not more than 1mm in consideration of the influence of a subsequent separant. Thus, the proper amount of machining of the blank thickness is ensured. The intermediate billet is rolled by adopting a positive tolerance, the positive tolerance of rolling is determined according to the guarantee capability of the rolled plate shape of the intermediate billet, and the rolling is generally controlled according to +3 to +4 mm. After processing, the steel plate processing table is firstly fixed by electric welding and then is arranged in a vacuum chamber for electron beam welding. Vacuum degree less than 10-2The welding operation may begin when pa.
Because the Cr and Ni alloy content of the super austenitic steel is high, the blank welding cost and the technical difficulty are high, through comparison, the cost can be greatly reduced (no welding material is used) by adopting a vacuum electron beam blank compared with manual submerged arc welding, a certain welding seam depth can be ensured, the rolling process of the manual submerged arc welding is easy to separate to cause rolling waste, the welding seam depth of the submerged arc welding is 10-20 mm, the vacuum electron beam can reach the welding depth of at most 100mm, in order to ensure the welding strength during rolling and simultaneously reduce the edge cutting loss of a welding area as much as possible, the welding seam depth is preferably 30-50 mm, and most preferably 40 mm. And confirming the depth condition of the welding seam through four-side super-magic-wave flaw detection after welding.
Before blank welding, a separant is coated on the surface of the blank. The isolating agent is an aqueous solution of MgO-based isolating agent, and MgO-based isolating agents commonly used in the field can be used in the invention, and are not described herein in detail. And simultaneously, polyvinyl alcohol is increased so as to increase the viscosity and prevent the release agent from falling off to influence the separation effect. The separant is coated on the surfaces of two blanks in contact by spraying respectively, the MgO separant is mixed according to the proportion of 110-130 g of the separant used per square meter, and the polyvinyl alcohol is mixed according to the proportion of 10g of the separant used per square meter. The separant is required to be sprayed uniformly, and meanwhile, the separant is required to be prevented from being left at the periphery of the blank by 50mm in a proper mode, so that the welding quality is prevented from being influenced by the separant. In the production method of the present invention, any of the conventional commercially available MgO-based release agents and polyvinyl alcohols can be used without any particular limitation. In actual use, the concentration of the MgO-based release agent solution and the concentration of the polyvinyl alcohol solution may be appropriately selected by those skilled in the art according to actual conditions, and the concentration is not particularly limited as long as the above-mentioned amount is satisfied.
After the spraying of the separant is finished, the moisture needs to be fully evaporated, and the blank is preferably subjected to heating treatment in a heat preservation furnace, for example, the heating temperature is 200 ℃, the heat preservation time is 60min, and the bulge caused in the heating process is prevented.
(2) Rolling of
In the step, the billet is heated, and then the billet is rolled by adopting a rolling procedure of first low reduction and then high reduction to obtain the composite steel plate.
The manufacturing method adopts a rolling schedule of firstly carrying out small reduction and then carrying out large reduction, specifically, firstly adopting the reduction not more than 3%, such as 4-5 mm, carrying out small reduction deformation for 2-3 passes, and enabling surface layer materials on two sides of a welding interface to be close to each other to be in atomic scale contact under the action of proper plastic deformation and rolling pressure to generate interatomic bonding and atomic cross-interface diffusion on two sides, so that large-area solid-phase compounding of steel is realized, and the excessive deformation of the first three passes can increase the impact force of a roller on a blank and the instability of a rolling mill, and easily causes open welding, so that the reduction of the first three passes is controlled within 3%. And the fourth pass begins to adopt 10-20% of rolling reduction, and the product is quickly rolled in a temperature-controlled manner, so that the dimensional precision and the plate shape of the product are ensured. The total rolling pass is determined according to the specification of the finished product. For example, for a finished product thickness of 5+5mm (i.e. the thickness of each of two single finished steel plates obtained after the composite steel plate is separated is 5mm), rolling can be completed by 14-16 passes.
Because the alloy content of the steel is high, the hot rolling deformation resistance is large, the heating temperature is 1250-1290 ℃, and the heating time is 10-14 min/10mm, preferably 12min/10 mm. The finishing temperature is controlled to be more than 880 ℃ for benefit.
(3) Straightening and separating
The composite steel plate is separated after heat treatment, and in order to ensure that the stress deformation is reduced as much as possible after separation, straightening is carried out before separation, preferably twice straightening is adopted. Straightening for the first time by adopting a coarse roller to realize large deformation straightening, wherein the straightening rolling reduction is 5-6 mm so as to ensure that the original plate shape is basically straight; and simultaneously straightening by adopting a coarse roller and a fine roller in the second straightening, setting the reduction amount to be 7-8 mm, and advising setting the straightening pressure to be more than 300 tons, and eliminating the internal stress of the steel plate as much as possible through the over-straightening. In the manufacturing method of the present invention, the coarse roll used may be a roll having a diameter of 320mm, and the fine roll used may be a roll having a diameter of 200mm, which is, of course, merely exemplary. For example, for the specification of 5+5mm of the thickness of the finished product, the rolling reduction of the first straightening can be set to be 6mm, the rolling reduction of the first straightening can be set to be 7mm, and the straightening pressure is 250-350 tons.
When the steel plate is separated, a double-gun plasma cutting mode is adopted, specifically, the double guns are used for simultaneously cutting edge parts and separating, and then the head and the tail of the steel plate are cut and separated. Cutting the edge part first can prevent the cutting precision from being reduced due to the arc shape of the steel plate caused by cutting the head and the tail. The edge cutting amount is slightly larger than the cutting loss of the normal hot rolled middle plate, and is generally considered to be a single edge of 80 mm. And after separation, the steel plate is straightened again because the steel plate is in an upper arch shape and a lower arch shape due to stress deformation.
The steel plate after the straightening and separating treatment can be subjected to conventional subsequent treatment, including the steps of pickling, grinding, warehousing and the like, which belong to conventional operations.
Examples
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
The S31254 medium plate with 5X 2000mm specification is produced by the cold rolling and rolling changing mode. The concrete steps are as follows:
the process route and specification design of the embodiment:
the intermediate billet is rolled (the specification is 180 multiplied by 1238 multiplied by L is 60 multiplied by 1600 multiplied by 2000) → vacuum electron beam blank making (the specification is 110 multiplied by 1550 multiplied by 1970) → composite pack rolling, heat treatment, straightening (on 10 multiplied by 2000 multiplied by 6000) → plasma cutting separation → straightening, acid cleaning, inspection and warehousing.
The method comprises the following specific steps:
(1) according to the specification, the continuous casting billet is rolled by a roughing mill to obtain an intermediate billet, and the billet is sprayed by adopting a special separant, wherein the total spraying area is about 12m21400g of MgO isolation agent and 120g of polyvinyl alcohol. And (3) after spraying, heating the blank by using a heating furnace to remove water in the separant, wherein the heating temperature is 200 ℃, and the heat preservation time is 60 min. And after heating, feeding the blank into a vacuum chamber with the vacuum degree of less than-2, carrying out vacuum electron beam welding on the blank, and carrying out flaw detection on the periphery of the composite billet after welding, wherein the average depth is 40 mm.
(2) The heating of the billet steel is controlled according to 1250-1290 ℃ and 12min/10 mm. The first three passes of reduction are respectively set to be 3mm, 3mm and 4mm, the fourth pass of reduction is 8mm, and 14 passes of reduction are finished. The final rolling condition is smooth, and the separation phenomenon can be seen on the cut end surface after rolling.
(3) And (3) straightening the composite steel plate after rolling, wherein the first straightening adopts a roller with the diameter of 320mm for large deformation straightening, the straightening reduction is 6mm, the second straightening adopts a roller with the diameter of 320mm and a roller with the diameter of 200mm for simultaneous straightening, the reduction is set to be 7mm, and the straightening pressure is set to be 250-350 tons. And after straightening treatment, separating, namely separating the composite steel plate into two 5mm steel plates to form an upper arch and a lower arch, re-flattening the steel plates, then performing reheating treatment, and after pickling, inspecting the steel plates, wherein the two obtained steel plates (steel plate 1 and steel plate 2) meet the standard requirements on the overall dimension, surface quality and performance, and the specific table is shown in tables 2 and 3.
Comparative example 1
In the embodiment, the S31254 medium plate with the specification of 5X 2000mm is rolled by adopting a conventional rolling change mode, and is rolled by a single sheet. The concrete steps are as follows:
designing a process route and specifications:
rolling an intermediate billet (the rolling specification is 180 multiplied by 1238 multiplied by L is 120 multiplied by 1238 multiplied by L) → rolling a finished product (the rolling specification is 6 multiplied by 1500 multiplied by L) → heat treatment, straightening, acid cleaning → rolling a finished product (the rolling specification is 5 multiplied by 1500 multiplied by 6000) → heat treatment, straightening, acid cleaning → inspection and warehousing.
Because of large rolling deformation resistance, the steel plate is produced by adopting a mode of changing rolling of a blank and a finished product, and cannot be used for producing 2000-width steel plates.
The thickness uniformity and the surface roughness of example 1 and comparative example 1 were measured, and the results are shown in tables 2 and 3, respectively.
The thickness uniformity detection method comprises the following steps: and (5) adopting a micrometer to carry out five-point detection.
The detection method of the surface roughness comprises the following steps: and detecting the surface after acid washing by using a roughness meter.
Table 2: thickness measurement, unit: millimeter
As can be seen from the data in Table 2, the average thickness deviation value of the two separated steel plates at the same position is 0.02mm, and no obvious thickness unevenness occurs. The thickness of a single steel plate is 0.11mm and 0.07mm respectively different from the plate. The thickness detection data of the steel plate obtained by the manufacturing method of the invention is obviously superior to that of the comparative example.
Table 3: surface roughness measurement, unit: micron meter
From the data in table 3, it can be seen that the roughness of the steel plate obtained by the manufacturing method of the present invention is lower overall than that of the earlier dual-phase steel middle plate (normally produced 8mm specification boat plate S32205 roughness level 3.8-4.5 μm). Compared with comparative example 1, the roughness of the steel sheet obtained by the manufacturing method of the present invention is significantly superior to that of comparative example 1. Comparing the outer surface of the steel plate obtained by the manufacturing method of the present invention with the parting surface, it can be seen that the roughness level of the parting surface is superior to that of the outer surface.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other substitutions, modifications, combinations, changes, simplifications, etc., which are made without departing from the spirit and principle of the present invention, should be construed as equivalents and included in the protection scope of the present invention.
Claims (7)
1. A manufacturing method of a thin and wide super austenitic stainless steel middle plate is characterized by comprising the following steps:
(1) superposing two intermediate blanks, and performing electron beam welding and compounding on four sides of the intermediate blanks in a vacuum chamber to obtain steel blanks;
(2) rolling the steel billet by adopting a rolling procedure of firstly carrying out small rolling and then carrying out large rolling to obtain a composite steel plate;
(3) straightening and separating the composite steel plate;
the thin and wide super austenitic stainless steel middle plate is a super austenitic stainless steel middle plate with the thickness less than or equal to 5mm and the width more than 1800 mm;
wherein, in the step (2), the rolling schedule of the first low reduction and the second high reduction is as follows: the rolling is completed by adopting the rolling reduction not more than 3% in the first 2-3 passes, then adopting the rolling reduction of 10-20%, and adopting 14-16 passes in total;
wherein, in the step (3), the straightening pressure of straightening is 250-350 tons; the straightening comprises a first straightening and a second straightening; the first straightening adopts coarse roller large deformation straightening, and the straightening rolling reduction is 5-6 mm; and the second straightening adopts a coarse roller and a fine roller to simultaneously straighten, and the straightening rolling reduction is 7-8 mm.
2. The manufacturing method according to claim 1, wherein in the step (1), the intermediate blank is subjected to surface coating of a release agent in superposition.
3. The method according to claim 2, wherein the release agent is a magnesium oxide release agent, and the amount of the magnesium oxide release agent applied is 110 to 130g per square meter of the intermediate billet.
4. The method of claim 3, wherein polyvinyl alcohol is further added to the release agent, and the polyvinyl alcohol is added in a proportion of 10g per square meter of the intermediate coating.
5. The manufacturing method according to claim 1, wherein in the step (1), the vacuum degree of the vacuum chamber is less than 10-2And (6) handkerchief.
6. The method according to claim 1, wherein in the step (2), the heating temperature is 1250 to 1290 ℃ and the heating time is 10 to 14min/10mm before rolling.
7. The manufacturing method according to claim 1, wherein in the step (2), the rolling finishing temperature is not lower than 880 ℃.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103552308A (en) * | 2013-10-31 | 2014-02-05 | 银邦金属复合材料股份有限公司 | Hot-rolled aluminum alloy composite material and machining process thereof |
| CN104492810A (en) * | 2014-10-27 | 2015-04-08 | 南京钢铁股份有限公司 | Preparation method of wide and thin hot-rolled steel plates with width-to-thickness ratio being greater than or equal to 500 |
| CN108723712A (en) * | 2018-05-29 | 2018-11-02 | 南京钢铁股份有限公司 | A kind of high anti-corrosion container super austenitic stainless steel composite plate and preparation method |
| CN108943911A (en) * | 2018-05-29 | 2018-12-07 | 南京钢铁股份有限公司 | A kind of TMCP type austenite stainless steel composite board peculiar to vessel and preparation method |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103552308A (en) * | 2013-10-31 | 2014-02-05 | 银邦金属复合材料股份有限公司 | Hot-rolled aluminum alloy composite material and machining process thereof |
| CN104492810A (en) * | 2014-10-27 | 2015-04-08 | 南京钢铁股份有限公司 | Preparation method of wide and thin hot-rolled steel plates with width-to-thickness ratio being greater than or equal to 500 |
| CN108723712A (en) * | 2018-05-29 | 2018-11-02 | 南京钢铁股份有限公司 | A kind of high anti-corrosion container super austenitic stainless steel composite plate and preparation method |
| CN108943911A (en) * | 2018-05-29 | 2018-12-07 | 南京钢铁股份有限公司 | A kind of TMCP type austenite stainless steel composite board peculiar to vessel and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 复合连铸板坯轧制特厚钢板技术的应用;崔风平等;《宽厚板》;20160430;第22卷(第2期);2.2 坯料轧制 * |
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