CN105087881A - Annealing method for 304 stainless steel - Google Patents
Annealing method for 304 stainless steel Download PDFInfo
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- CN105087881A CN105087881A CN201510589043.2A CN201510589043A CN105087881A CN 105087881 A CN105087881 A CN 105087881A CN 201510589043 A CN201510589043 A CN 201510589043A CN 105087881 A CN105087881 A CN 105087881A
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Abstract
The invention provides an annealing method for 304 stainless steel. The annealing method for 304 stainless steel is used for 304 stainless steel subjected to cold rolling and repressing. According to the annealing method for 304 stainless steel, 304 austenitic stainless steel black-sheet strip steel with the thickness specification ranging from 2.0mm to 10.0mm and the width specification ranging from 900mm to 1600mm is used. The annealing method for 304 stainless steel comprises the steps of a, annealing: subjecting the strip steel to annealing; b, physical dephosphorization: performing surface scale removal on the annealed strip steel; c, acid pickling: performing acid pickling on the strip steel subjected to physical dephosphorization; d, cold rolling and repressing: rolling the strip steel after acid pickling through a cold rolling unit for 5 passes to 13 passes; and e, performing cold annealing and acid pickling. According to the annealing method for 304 stainless steel, consumption of required fuel gas can be lowered through the reduction of the temperature, so that objectives of saving energy, lowering cost and saving investment are achieved.
Description
Technical field
The present invention relates to field of metallurgy, be specifically related to hot-rolled stainless steel production technology, particularly purposes thermal annealing pickling production method pressed again by 304 austenic stainless steel belt steel, i.e. a kind of stainless steel annealing method, especially a kind of 304 stainless steel annealing methods.
Background technology
In 304 (number) stainless steel strip thermal annealing acid cleaning process, produce the white skin volume of hot rolling, to reach the performance of product demand by thermal annealing acid cleaning process.General 304 stainless steel strips are after carrying out hot rolling, higher and the Carbide Precipitation of its hardness, the main purpose of 304 stainless steel strip thermal annealings is to make carbide solid solution (solution treatment), adjustment grain fineness number, softens, reduces delta ferrite etc., to meet product demand during subsequent disposal, the purposes of general 304 white skin volume products has: sheet material purposes, tubing purposes, punching press purposes, grinds purposes and presses purposes again.
When pressing purposes material to press through in journey again, the grain structure in band steel can be destroyed again, and needs again cold annealing operation to form new grain structure.At present, then press 304 stainless steels and the sheet material purposes of purposes, tubing purposes, punching press purposes, 304 stainless annealing temperatures of grinding purposes are all 1000 to 1100 DEG C, and the heat energy of consumption is larger.
In sum, in prior art, there is following problem: press 304 stainless steel annealing temperature of purposes high again, the heat energy of consumption is larger.
Summary of the invention
The invention provides a kind of 304 stainless steel annealing methods, reduce annealing temperature operation, to reach save energy, to fall the object of this section money.
For this reason, the present invention proposes a kind of 304 stainless steel annealing methods, and described 304 stainless steel annealing methods are used for cold rolling 304 stainless steels of pressing again, and described 304 stainless steel annealing methods adopt 304 austenitic stainless steel casting skin band steel, thickness specification 2.0mm to 10.0mm; Width specifications 900mm to 1600mm, described 304 stainless steel annealing methods comprise:
Step a, annealing operation: band steel is carried out anneal, annealing temperature is between 900 to 1000 DEG C, and the time length is 1 to 3 minute, plate speed 40 to 70mpm;
Step b, physics dephosphorization: the band steel of annealed process is carried out surface scale removal, first carries out brokenly phosphorus machine and breaks phosphorus technique in physics dephosphorization, by the tension force stretching of broken phosphorus machine tension force, make band steel produce the extension of 0.5 ± 0.2%, steel band superficial oxidation skin and stainless steel base are departed from; Again by shot-blasting machine ball blast technique, by throwing wheel impelling to belt steel surface, making band steel superficial oxidation skin be thrown by ball blast the belt steel surface that comes off, after ball blast, being with steel to enter acid cleaning process;
Step c, thermal annealing pickling operation: carry out pickling to the band steel after physics dephosphorization process, obtains white skin stainless-steel roll product;
Steps d, cold rollingly presses operation: adopt cold mill complex the band steel after pickling to be carried out to the rolling of 5-13 passage, final rolling thickness is 0.3mm to 6.0mm again;
Step e, cold anneal pckle line: press post-job band steel to carry out continuous annealing at 1100-1200 DEG C again to through cold rolling, annealing time is 1-3 minute, then by electrolysis, then through the pickling of cold annealing nitration mixture, obtain final die pressing product again;
The finished product performance: in mechanical property, yield strength 200 to 350N/mm
2, tensile strength 600 to 800N/mm
2, hardness HV is 150 to 200, metallographic grade 7.0 to 9.0 grades; Solidity to corrosion and formability all meet standard.
Further, broken phosphorus machine breaks in phosphorus technique, adopts the tension force stretching between 20Ton to 30Ton.
Further, in ball blast technique, ball blast size is 0.2 to 0.6mm, throws wheel speed 1800 to 2200rpm, ball blast projection amount 800 to 1000kg/min.
Further, in step c, the band steel after physics dephosphorization process is carried out H2SO4 pickling, wherein sulfuric acid concentration is 100 ~ 200g/l, concentration of metal ions≤60g/L, and pickling temperature is 75 ~ 85 DEG C, H
2sO
4pickling time is 0.5 to 2min, and then carry out the pickling of thermal annealing nitration mixture, nitration mixture comprises HF and HNO
3, wherein HF concentration is 35g/l, HNO
3concentration is 100g/l, and pickling temperature is 55 to 65 DEG C, and pickling time is 1 to 3min.
Further, thermal annealing product performance, product yield strength YS280 to 340N/mm
2, tensile strength 680 to 750N/mm
2, between hardness HRB85 to 90, metallographic grade 7.0 to 9.0 grades.
Further, cold rollingly to press again in operation: adopt single chassis 20 roller reversible cold-rolling mill group to carry out the rolling of 5-13 passage, obtaining cold-rolling stainless steel belt steel rolling power is 600 to 1000Ton, and maximum roll speed is 300 to 500mpm.
Further, in step e, electrolysis adopts proportion to be the Na of 1.1 to 1.3
2sO
4solution, the strength of current of electrolysis is 5000 to 8000A, and temperature is 60-80 DEG C.
Further, in the cold annealing nitration mixture pickling in step e, HNO
3concentration be the concentration of 70-100g/L, HF be 5-10g/L, the temperature of described nitration mixture pickling is 50-60 DEG C.
Further, described 304 stainless steel annealing methods comprise: following steps:
Step S1: material preparation: select 304 stainless steel strips to press material again, thickness specification 3.5mm, width specifications 1250mm;
Step S2: annealing operation: by ready band steel anneal, annealing temperature 1000 DEG C, annealing time is 2.2 minutes, plate speed 70mpm;
Step S3: physics dephosphorization: the band steel of annealed process is carried out dephosphorization, broken phosphorus machine tension force 24Ton, unit elongation 0.5%; Shot-blasting machine projection amount 1100kg/min, velocity of projection 2100rpm;
Step S4: pickling operation, carries out pickling to the band steel after physics dephosphorization process: H
2sO
4concentration 150g/l, H
2sO
4temperature 80 DEG C, pickling time is 0.7 minute; HF concentration is 35g/l, HNO
3concentration is 100g/l, nitration mixture temperature 60 C, and pickling time is 1.8 minutes, product performance after pickling: yield strength YS290N/mm
2, tensile strength TS700N/mm
2, hardness HRB88, metallographic grade 8.5 grades, meets 304 steel grade mechanical propertys;
Step S5: cold rollingly press operation again: carry out cold rolling to the band steel after pickling, rolling thickness 1.2mm, operation Pass number 9Pass, maximum rolling force 950Ton, rolling top speed 530mpm;
Step S6: cold annealing and pickling: press post-job band steel again to carry out continuous annealing and pickling again to through cold rolling, annealing temperature 1140 DEG C, annealing time 2min, Na
2sO
4gravity 1.17, the strength of current of its electrolysis is 6500A, and temperature is 68 DEG C, mixed acid solution HNO
3concentration be the concentration of 94g/L, HF be 7.5g/L, temperature is 55 DEG C;
The finished product performance: yield strength YS270N/mm
2, tensile strength TS680N/mm
2, hardness HV171, metallographic grade 7.5 grades, meets 304 steel grade mechanical property standards.
Contriver finds in work production: press through in journey when pressing purposes material more again, can be destroyed with the grain structure in steel, need again cold annealing operation to form new grain structure, the organizational relationship that new grain structure generates with thermal annealing is before little, and therefore, contriver thinks and presses the grain structure of purposes material thermal annealing to require relative loose again, can than sheet material purposes, tubing purposes, punching press purposes, the performance of the grain structure of the thermal annealing of grinding purposes is more weak a little.On this basis, contriver is when purposes material is pressed in production again, under not affecting the prerequisite of pressing operation again, roadmap is changed to original technical scheme, suitable reduction annealing temperature, still can obtain the qualified grain structure of pressing purposes material thermal annealing again, thus can reach save energy, fall this section money object.For this reason, contriver passes through thermal annealing temperatures and cold rolling many-sided synthetic study such as 304 stainless grain structures, mechanical property, chemical property, rolling performance of pressing again, propose and cold rolling 304 stainless thermal annealing temperatures of pressing again are reduced about 100 DEG C, under this technique, still the grain structure of ideal applicable cold rolling thermal annealing of pressing again can be obtained, while energy-saving and emission-reduction, cold rolling various performance requriementss of pressing again can also be met.
Accompanying drawing explanation
Fig. 1 is the metallurgical structure figure of 304 stainless steel hot annealing of prior art;
Fig. 2 is the metallurgical structure figure of 304 stainless steel hot annealing of the embodiment of the present invention.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the present invention is described.
When the present invention presses the operation of purposes material again to 304 stainless steel strip thermal annealing acid cleaning process, do not affecting under the prerequisite of pressing operation again, implement 304 stainless steels and press (the annealing temperature compared with normal annealing temperature reduction about about 100 DEG C of material low-temperature annealing again, existing thermal annealing temperatures is 1000-1100 DEG C), the consumption reducing required combustion gas is reduced, to reach save energy by temperature, fall the object of this section money, the present invention is in order to obtain suitable thermal annealing temperatures, and carrying out experiment repeatedly and process modification, is 500 DEG C at thermal annealing temperatures, 550 DEG C, 600 DEG C, 650 DEG C, 700 DEG C, 750 DEG C, 800 DEG C, 850 DEG C, 875 DEG C, 900 DEG C, 925 DEG C, 950 DEG C, 975 DEG C, 1000 DEG C, 1025 DEG C, test respectively for 1050 DEG C, wherein, the low-temperature annealing of less than 875 DEG C is all coarse to show, thus cause thermal annealing pickled surface and final cold-rolled products surface irregularity and iron scale to remain more and failed, and thermal annealing temperatures is between 900-1000 DEG C, can energy consumption be reduced, the surface quality of cold-rolled products can be ensured again.The present invention adopts following technical scheme:
Low annealing material object: 304 austenitic stainless steel casting skin band steel; Purposes is cold rollingly press purposes material again; Thickness specification 2.0mm-10.0mm; Width specifications 900mm-1600mm;
To above-mentioned material stainless steel strip, carry out low-temperature annealing operation, this annealing temperature is between 900-1000 DEG C, and the time length is 1-3 minute, and plate speed 40-70mpm reduces 100 DEG C relative to normarzing annealing temperature 1000-1100 DEG C;
Physics dephosphorization, the band steel of annealed process is carried out surface scale removal, need to carry out acid cleaning process, acid cleaning process needs to carry out physical oxidation skin and goes out before carrying out, first carry out brokenly phosphorus machine and break phosphorus technique, by the tension force stretching between 20Ton-30Ton, make band steel produce the extension of 0.5 ± 0.2%, steel band superficial oxidation skin and stainless steel base are departed from; Again by shot-blasting machine ball blast technique, ball blast is by throwing wheel high-speed projectile to belt steel surface, band steel superficial oxidation skin is made to be thrown by ball blast the belt steel surface that comes off, ball blast size is 0.2-0.6mm, throw wheel speed 1800-2200rpm, ball blast projection amount 800-1000kg/min, is with steel to enter acid cleaning process section afterwards and carries out final acid pickling step;
Acid pickling step, carries out HSO4 pickling by the band steel after physics dephosphorization process, and wherein sulfuric acid concentration is nitre 100 ~ 200g/l, concentration of metal ions≤60g/L, and pickling temperature is 75 ~ 85 DEG C, H
2sO
4pickling time is 0.5-2min.Follow-up pickling is nitration mixture pickling, and nitration mixture comprises HF and HNO
3, wherein HF concentration is 35g/l, HNO
3concentration is 100g/l, and pickling temperature is 55-65 DEG C, and pickling time is 1-3min, obtains white skin stainless-steel roll product afterwards;
Thermal annealing product performance, are in the annealing between 900 to 1000 DEG C through annealing temperature of the present invention, and (cold rolling press operation again before) product yield strength YS280-340N/mm
2, tensile strength 680-750N/mm
2between hardness HRB85-90, metallographic grade 7.0-9.0 level, meet normal product benchmark, but contrast normal product, because annealing temperature is on the low side, causes hardness and intensity higher than normal product, may there is certain impact when using for deep-draw and deep processing purposes material, so low-temperature annealing material is defined as press purposes material again, hardness to a certain degree increase on press again affect during operation small.
Cold rollingly press operation again: adopt single chassis 20 roller reversible cold-rolling mill group to carry out the rolling of 5-13 passage, obtaining cold-rolling stainless steel belt steel rolling power is 600-1000Ton, and maximum roll speed is 300-500mpm, and final rolling thickness is 0.3mm-6.0mm; Because the hardness of the existing technique of thermal annealing pickled steel strip hardness ratio increases, every time rolling load of cold rolling operation has carried out revision slightly, slightly lower the draught of the first passage, add second and the 3rd draught of passage, to adapt to the changes in hardness of material, because adjustment amount is less, cold rolling mill operation is had no significant effect.
Cold annealing and pickling: carry out continuous annealing at 1100-1200 DEG C, annealing time is 1-3 minute, after be the Na of 1.1-1.3 by proportion
2sO
4solution, the strength of current of its electrolysis is 5000-8000A, and temperature is 60-80 DEG C, then through nitration mixture pickling, HNO
3with in the mixed acid solution of HF, the concentration of HNO3 is the concentration of 70-100g/L, HF is 5-10g/L, and the temperature of described nitration mixture pickling is 50-60 DEG C, after obtain final die pressing product again;
The finished product performance: yield strength YS200-350N/mm in mechanical property
2, tensile strength 600-800N/mm
2, hardness HV is 150-200, metallographic grade 7.0-9.0 level; Solidity to corrosion and formability all meet standard.
Embodiment
1, material preparation: select 304 stainless steels to press material again, thickness specification 3.5mm, width specifications 1250mm;
2, annealing operation: annealing temperature 1000 DEG C, annealing time is 2.2 minutes, plate speed 70mpm;
3, physics dephosphorization: broken phosphorus machine tension force 24Ton, unit elongation 0.5%; Shot-blasting machine projection amount 1100kg/min, velocity of projection 2100rpm;
4, pickling operation: H2SO4 concentration 150g/l, H2SO4 temperature 80 DEG C, pickling time is 0.7 minute; HF concentration is 35g/l, HNO
3concentration is 100g/l, nitration mixture temperature 60 C, and pickling time is 1.8 minutes;
5, product performance: yield strength YS290N/mm2, tensile strength TS700N/mm
2, hardness HRB88, metallographic grade 8.5 grades, meet 304 steel grade mechanical propertys, but hardness is comparatively close to the upper limit 90;
6, cold rollingly operation is pressed again: rolling thickness 1.2mm, operation Pass number 9Pass, maximum rolling force 950Ton, rolling top speed 530mpm;
7, cold annealing and pickling: annealing temperature 1140 DEG C, annealing time 2min, Na
2sO
4gravity 1.17, the strength of current of its electrolysis is 6500A, and temperature is 68 DEG C, mixed acid solution HNO
3concentration be the concentration of 94g/L, HF be 7.5g/L, temperature is 55 DEG C;
8, the finished product performance: yield strength YS270N/mm
2, tensile strength TS680N/mm
2, hardness HV171, metallographic grade 7.5 grades, meets 304 steel grade mechanical property standards.
Fig. 1 is the metallurgical structure figure of 304 stainless steel hot annealing of prior art, and Fig. 2 is the metallurgical structure figure that 304 stainless steel hots of the embodiment of the present invention are annealed.As can be seen from Fig. 1 and Fig. 2, the metallographic structure that the metallographic structure of the stainless steel hot annealing of Fig. 1 and stainless steel Low Temperature Thermal of the present invention are annealed does not have difference substantially, and performance can reach identical, thus, the present invention, when reducing energy consumption, achieves normal performance.
Contrast normarzing annealing material handling situations, low-temperature annealing material has purposes to limit, annealing temperature compared with normal annealing temperature reduces about about 100 DEG C, all the other production technique can be identical with Normal woods, intermediates after thermal annealing are had a certain impact, but cold rollingly press operation to have no significant effect again, the equal indifference of cold rolling the finished product performance and can normal product.The energy that low-temperature annealing is brought is thrifty, and it is 31m that normarzing annealing ton works as gas consumption
3/ Ton, low-temperature annealing ton is when consuming as 28m
3/ Ton, ton is as thrifty 3m
3/ Ton, calculates by annual 300000 Ton, thrifty 900,000 m of annual combustion gas
3.
The foregoing is only the schematic embodiment of the present invention, and be not used to limit scope of the present invention.For each integral part of the present invention can mutually combine under the condition of not conflicting, any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.
Claims (9)
1. 304 stainless steel annealing methods, is characterized in that, described 304 stainless steel annealing methods are used for cold rolling 304 stainless steels of pressing again, and described 304 stainless steel annealing methods adopt 304 austenitic stainless steel casting skin band steel, thickness specification 2.0mm to 10.0mm; Width specifications 900mm to 1600mm, described 304 stainless steel annealing methods comprise:
Step a, annealing operation: band steel is carried out anneal, annealing temperature is between 900 DEG C to 1000 DEG C, and the time length is 1 minute to 3 minutes, plate speed 40mpm to 70mpm;
Step b, physics dephosphorization: the band steel of annealed process is carried out surface scale removal, first carries out brokenly phosphorus machine and breaks phosphorus technique in physics dephosphorization, by the tension force stretching of broken phosphorus machine tension force, make band steel produce the extension of 0.5 ± 0.2%, steel band superficial oxidation skin and stainless steel base are departed from; Again by shot-blasting machine ball blast technique, by throwing wheel impelling to belt steel surface, making band steel superficial oxidation skin be thrown by ball blast the belt steel surface that comes off, after ball blast, being with steel to enter acid cleaning process;
Step c, thermal annealing pickling operation: carry out pickling to the band steel after physics dephosphorization process, obtains white skin stainless-steel roll product;
Steps d, cold rollingly presses operation: adopt cold mill complex the band steel after pickling to be carried out to the rolling of 5-13 passage, final rolling thickness is 0.3mm to 6.0mm again;
Step e, cold anneal pckle line: press post-job band steel to carry out continuous annealing at 1100 DEG C-1200 DEG C again to through cold rolling, annealing time is 1 minute to 3 minutes, then by electrolysis, then through the pickling of cold annealing nitration mixture, obtain final die pressing product again;
The finished product performance: in mechanical property, yield strength 200N/mm to 350N/mm
2, tensile strength 600N/mm to 800N/mm
2, hardness HV is 150 to 200, metallographic grade 7.0 to 9.0 grades; Solidity to corrosion and formability all meet standard.
2. 304 stainless steel annealing methods as claimed in claim 1, is characterized in that, broken phosphorus machine breaks in phosphorus technique, adopts the tension force stretching between 20Ton to 30Ton.
3. 304 stainless steel annealing methods as claimed in claim 2, is characterized in that, in ball blast technique, ball blast size is 0.2mm to 0.6mm, throw wheel speed 1800 to 2200rpm, ball blast projection amount 800 to 1000kg/min.
4. 304 stainless steel annealing methods as claimed in claim 2, is characterized in that, in step c, the band steel after physics dephosphorization process are carried out H
2sO
4pickling, wherein sulfuric acid concentration is 100g/l ~ 200g/l, concentration of metal ions≤60g/L, and pickling temperature is 75 DEG C ~ 85 DEG C, H
2sO
4pickling time is 0.5min to 2min, and then carry out the pickling of thermal annealing nitration mixture, nitration mixture comprises HF and HNO
3, wherein HF concentration is 35g/l, HNO
3concentration is 100g/l, and pickling temperature is 55 DEG C to 65 DEG C, and pickling time is 1min to 3min.
5. 304 stainless steel annealing methods as claimed in claim 2, it is characterized in that, thermal annealing product performance are: product yield strength YS280N/mm
2to 340N/mm
2, tensile strength 680N/mm
2to 750N/mm
2, between hardness HRB85 to 90, metallographic grade 7.0 to 9.0 grades.
6. 304 stainless steel annealing methods as claimed in claim 2, it is characterized in that, cold rollingly to press again in operation: adopt single chassis 20 roller reversible cold-rolling mill group to carry out the rolling of 5-13 passage, obtaining cold-rolling stainless steel belt steel rolling power is 600Ton to 1000Ton, and maximum roll speed is 300mpm to 500mpm.
7. 304 stainless steel annealing methods as claimed in claim 2, is characterized in that, in step e, electrolysis adopts proportion to be the Na of 1.1 to 1.3
2sO
4solution, the strength of current of electrolysis is 5000A to 8000A, and temperature is 60 DEG C-80 DEG C.
8. 304 stainless steel annealing methods as claimed in claim 2, is characterized in that, in the cold annealing nitration mixture pickling in step e, and HNO
3concentration be the concentration of 70g/L-100g/L, HF be 5g/L-10g/L, the temperature of described nitration mixture pickling is 50 DEG C-60 DEG C.
9. 304 stainless steel annealing methods as claimed in claim 2, is characterized in that, described 304 stainless steel annealing methods comprise: following steps:
Step S1: material preparation: select 304 stainless steel strips to press material again, thickness specification 3.5mm, width specifications 1250mm;
Step S2: annealing operation: by ready band steel anneal, annealing temperature 1000 DEG C, annealing time is 2.2 minutes, plate speed 70mpm;
Step S3: physics dephosphorization: the band steel of annealed process is carried out dephosphorization, broken phosphorus machine tension force 24Ton, unit elongation 0.5%; Shot-blasting machine projection amount 1100kg/min, velocity of projection 2100rpm;
Step S4: thermal annealing pickling operation, carries out pickling to the band steel after physics dephosphorization process: H
2sO
4concentration 150g/l, H
2sO
4temperature 80 DEG C, pickling time is 0.7 minute; HF concentration is 35g/l, HNO
3concentration is 100g/l, nitration mixture temperature 60 C, and pickling time is 1.8 minutes, product performance after pickling: yield strength YS290N/mm
2, tensile strength TS700N/mm
2, hardness HRB88, metallographic grade 8.5 grades, meets 304 steel grade mechanical propertys;
Step S5: cold rollingly press operation again: carry out cold rolling to the band steel after pickling, rolling thickness 1.2mm, work road number of times is 9 passages, maximum rolling force 950Ton, rolling top speed 530mpm;
Step S6: cold anneal pckle line: press post-job band steel again to carry out continuous annealing and pickling again to through cold rolling, annealing temperature 1140 DEG C, annealing time 2min, Na
2sO
4gravity 1.17, the strength of current of its electrolysis is 6500A, and temperature is 68 DEG C, mixed acid solution HNO
3concentration be the concentration of 94g/L, HF be 7.5g/L, temperature is 55 DEG C;
The finished product performance: yield strength YS:270N/mm
2, tensile strength TS:680N/mm
2, hardness HV171, metallographic grade 7.5 grades, meets 304 steel grade mechanical property standards.
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| CN106381377A (en) * | 2016-08-30 | 2017-02-08 | 北京北冶功能材料有限公司 | Method for improving sealing performance of Fe-Ni alloy strip obtained after feather polishing |
| CN107983773A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of again rolling mill practice of hot-rolled stainless steel |
| CN107983770A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of hot acid of stainless steel washes production technology |
| CN112501422A (en) * | 2020-11-27 | 2021-03-16 | 山西太钢不锈钢股份有限公司 | Surface treatment method for 304 series high-grade panel stainless steel raw material |
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| CN106381377A (en) * | 2016-08-30 | 2017-02-08 | 北京北冶功能材料有限公司 | Method for improving sealing performance of Fe-Ni alloy strip obtained after feather polishing |
| CN107983773A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of again rolling mill practice of hot-rolled stainless steel |
| CN107983770A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of hot acid of stainless steel washes production technology |
| CN107983770B (en) * | 2016-10-27 | 2019-09-13 | 福建宏旺实业有限公司 | A kind of hot acid of stainless steel washes production technology |
| CN107983773B (en) * | 2016-10-27 | 2019-10-29 | 福建宏旺实业有限公司 | A kind of rolling mill practice again of hot-rolled stainless steel |
| CN112501422A (en) * | 2020-11-27 | 2021-03-16 | 山西太钢不锈钢股份有限公司 | Surface treatment method for 304 series high-grade panel stainless steel raw material |
| CN113403461A (en) * | 2021-06-25 | 2021-09-17 | 宝钢德盛不锈钢有限公司 | Manufacturing process and product of high-hardness hardware stainless steel |
| CN113403461B (en) * | 2021-06-25 | 2023-02-28 | 宝钢德盛不锈钢有限公司 | Manufacturing process and product of high-hardness hardware stainless steel |
| CN113894163A (en) * | 2021-10-20 | 2022-01-07 | 江苏甬金金属科技有限公司 | Cold rolling process of wide ultrathin stainless steel band |
| CN115094506A (en) * | 2022-06-13 | 2022-09-23 | 山西太钢不锈钢股份有限公司 | Method for improving surface quality of cold-rolled coil |
| CN115558935A (en) * | 2022-10-18 | 2023-01-03 | 山西太钢不锈钢股份有限公司 | Annealing and pickling method for hot-rolled austenitic stainless steel strip steel after surface overburning |
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Address after: 215625 Yangtze River Metallurgical Industrial Park, Zhangjiagang City, Jiangsu Province Patentee after: Puxiang (Zhangjiagang) Stainless Steel Co., Ltd. Address before: 215625 Yangtze River Metallurgical Industrial Park, Zhangjiagang City, Jiangsu Province Patentee before: Puxiang Stainless Steel Co Ltd, Shangjiagang |