CN101691638A - 6Cr14 stainless steel strip and manufacturing method thereof - Google Patents
6Cr14 stainless steel strip and manufacturing method thereof Download PDFInfo
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- CN101691638A CN101691638A CN200910233060A CN200910233060A CN101691638A CN 101691638 A CN101691638 A CN 101691638A CN 200910233060 A CN200910233060 A CN 200910233060A CN 200910233060 A CN200910233060 A CN 200910233060A CN 101691638 A CN101691638 A CN 101691638A
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Abstract
The invention provides a 6Cr14 stainless steel strip and a manufacturing method thereof, and belongs to the technical field of stainless steel materials. The 6Cr14 stainless steel strip comprises the following compositions in percentage by mass: 0.50 to 0.70 percent of carbon, 13.00 to 15.00 percent of chromium, 0.30 to 0.55 percent of silicon, 0.30 to 0.52 percent of manganese, less than 0.03 percent of sulfur, less than 0.035 percent of phosphorus, and the balance of iron. The technical scheme provided by the invention has a reasonable selected formula; the hardness (HRC) of the 6Cr14 stainless steel strip after heat treatment can reach between 60 and 62, so blades made of the 6Cr14 stainless steel strip have ideal wear resistance, the use cost of users is reduced, and resources are saved; and the recommended method has less process flows, saves energy, avoids material consumption, and can meet the blade manufacturing process requirement of blade manufacturers.
Description
Technical field
The invention belongs to technical field of stainless steel materials, be specifically related to a kind of 6Cr14 stainless steel strip, and relate to the manufacture method of stainless steel strip.
Background technology
For example the service requirements of the electric hair cutter blade of articles for hair cut and manual or electronic stainless steel razor blade or the like is harsh day by day to the stainless steel knife product along with people, thereby makes aforementioned electric clipper blade and the razor blade made by the stainless steel strip of 3Cr13 or 4Cr13 etc. usually in the prior art be difficult to satisfy desired technical requirements.So-called technical requirements is meant not only have good sharpness and wear resistance, and has the ideal erosion resistance.
Widely be applied to make consist of (by the quality percentage) of the 3Cr13 of stainless steel knife and 4Cr13 Stainless Steel Band steel at present: 0.26～0.45% carbon (C), 12.00～14.00% chromium (Cr),＜1.00% silicon (Si),＜1.00% manganese (Mn),＜0.030% sulphur (S) and＜0.040% phosphorus (P), Yu Weitie (Fe).By the resulting stainless steel strip of above-mentioned prescription hardness after heat treatment lower (HRC53-55), so hardness number also is inferior to the carbon steel blade.Because hardness value is low, thereby wear-resisting weak effect, cutting edge is easily blunt, increases use cost not only for the user of stainless steel knife, and economizes on resources because of work-ing life is short and unfavorable.
The method of the stainless steel strip that preparation stainless steel knife product is used in the prior art is: earlier by electrosmelting, cast after the smelting or be processed into electrode bar; Become steel band through the esr post-treatment again.As the industry's knowledge of the reason, esr be the resistance heat that produces when utilizing electric current by slag as the method that thermal source carries out melting, its objective is the steel ingot of purifying metals and obtaining clean homogeneous microstructure densification; Its principle is that electric current passes through liquid slag scum thermal resistance, and with the metal electrode fusing, molten metal accumulates molten drop, passes slag blanket during drippage and enters metal pool, is frozen into steel ingot then in water mold.Know that therefrom there are following two place's shortcoming in above-mentioned preparation method: the one, preparation cycle is long, needs heating for multiple times in preparation process, energy consumption height not only, and also material deterioration inside is big; The 2nd, be processed into steel billet by steel ingot, make steel band again through shearing, heavily to reach volume long little because of the volume of every steel band, so can't satisfy the automatic production line requirement of blade production firm.That is to say that the resulting steel band of above-mentioned preparation method is difficult to the automatization blade production line coupling with blade production firm, causes blade to make inefficiency.
In view of above-mentioned prior art, the applicant thinks and is necessary that not only the hardness to stainless steel strip is improved, and is necessary the preparation method of stainless steel strip is improved, and technical scheme described below produces under this background.
Summary of the invention
Task of the present invention is to provide a kind of the prescription rationally to help to improve hardness and have the ideal wear resistance with the blade that ensures manufacturing and use the 6Cr14 stainless steel strip that use cost that embodiment both reduced the user economizes on resources.Task of the present invention also is to provide a kind of and helps shortening work flow, cuts down the consumption of energy and material deterioration inside and use and embody save energy and resource, is of value to satisfying that the required volume of blade production firm is heavy, volume is long and the manufacture method of the 6Cr14 stainless steel strip of thickness requirement.
Task of the present invention is finished like this, a kind of 6Cr14 stainless steel strip, it consists of: the manganese of the chromium of the carbon of 0.50-0.70 quality %, 13.00-15.00 quality %, the silicon of 0.30-0.55 quality %, 0.30-0.52 quality %,＜sulphur of 0.03 quality % and the phosphorus of＜0.035 quality %, surplus is an iron.
A kind of 6Cr14 stainless steel strip, it consists of: the manganese of the chromium of the carbon of 0.55-0.65 quality %, 13.30-14.35 quality %, the silicon of 0.35-0.51 quality %, 0.32-0.50 quality %, the sulphur of 0.001-0.002 quality % and the phosphorus of 0.021-0.026 quality %, surplus is an iron.
A kind of preparation method of 6Cr14 stainless steel strip may further comprise the steps:
A) the molten white silk, stainless steel steel scrap, carbon steel steel scrap and iron alloy are dropped into refining just in the intermediate frequency furnace, obtain steel-making water just, quality % content to the chemical element of steel-making water at the beginning of first experienced molten steel sampling analysis and the adjustment, the water of then will just making steel changes the refining furnace ladle refining over to, and on the liquid level of molten steel, cover slag charge, mix refining under the state in heated by electrodes and steel ladle bottom argon blowing gas mixing, control refining temperature and time, obtain through purified cast steel water to be poured, and treat the quality % content that casting molten steel sampling analysis reached and then adjusted the chemical element of cast steel water to be poured;
B) casting pours into cast steel water to be poured in the ingot mold, obtains steel ingot;
C) annealing and surface finish are packed steel ingot into and are heated control Heating temperature and control soaking time in the annealing furnace, treat to come out of the stove when steel ingot is cooled to below 500 ℃ in annealing furnace, naturally cooling after coming out of the stove carries out surface finish to cooled steel ingot, obtains the steel ingot base that hot rolled strip is used;
D) hot rolled strip, with hot rolled strip use the steel ingot base pack into and heat in the process furnace, the control Heating temperature, it is rolling to send into hot continuous mill after going out process furnace, and control hot rolled rolling thickness, obtains the hot-rolled steel made-up belt;
E) cold-rolled steel strip is done one to the hot-rolled steel made-up belt and is repeated annealing, pickling, cleaning and cold rolling more than the passage, and controls the cold rolling thickness of final passage, obtains the cold-rolled steel made-up belt;
F) itemize is divided into band and rolling packing with the cold-rolled steel made-up belt, controls the width of band, obtains being used to make the 6Cr14 stainless steel strip of blade.
In a specific embodiment of the present invention, the temperature of the first steel-making water steps A) is 1570-1600 ℃, the quality % content of chemical element of water and described and then adjust the quality % content that the quality % content of the chemical element of cast steel water to be poured is chemical element and be adjusted into is just made steel in described adjustment: the manganese of the chromium of the carbon of 0.50-0.70 quality %, 13.00-15.00 quality %, the silicon of 0.30-0.55 quality %, 0.30-0.52 quality %,＜sulphur of 0.03 quality % and the phosphorus of＜0.03 quality %, Yu Weitie.
In another specific embodiment of the present invention, steps A) slag charge described in is made up of calcium oxide and Calcium Fluoride (Fluorspan), and the weight part ratio of calcium oxide and Calcium Fluoride (Fluorspan) is 4-5: 1, and the amount of slag charge is the 2-3% of molten steel weight; Described ladle bottom blowing argon gas is continuous bottom blowing, and the pressure of argon gas is 0.2-0.4MPa.
In another specific embodiment of the present invention, steps A) control refining temperature and time described in are that refining temperature and time are controlled to be 1560-1590 ℃ and 15-25min respectively.
In another specific embodiment of the present invention, step C) the control Heating temperature described in is that temperature is controlled to be 900-950 ℃, and described control soaking time is that soaking time is controlled to be 8-10h; Described surface finish be meant to anneal the back and through the surface removal of cooled steel ingot scab, the surface spots of slagging scorification, crackle and sand holes.
In another specific embodiment of the present invention, step D) the control Heating temperature described in is to be 1130-1170 ℃ with heating and temperature control; Described control hot rolled rolling thickness is that rolling thickness is controlled to be 4-5mm.
More of the present invention and in specific embodiment, repeating step e) annealed, pickling, cleaning and cold rolling in the annealing temperature of first passage be 840-870 ℃, soaking time is 6-8h, and the annealing temperature of all the other passages and soaking time are 750-780 ℃ and 6-8h; The pickle solution that described pickling is used is that mass percent concentration is the sulphuric acid soln of 15-20%, and pickling temperature is 50-70 ℃, and the cold rolling thickness of the final passage of described control is to be 0.1-2.0mm with gauge control.
The width of the control band in of the present invention and then specific embodiment, step F) is that width is controlled to be 10-100mm.
The selected prescription of technical scheme provided by the invention is reasonable, and the hardness after the thermal treatment (HRC) can reach 60-62, thereby can make the blade of manufacturing have the ideal wear resistance, helps reducing user's use cost and economizing on resources; The method technical process of being recommended is few, has energy-conservation and avoid material deterioration inside and can satisfy the required manufacturing process requirement of blade of blade production firm.
Embodiment
Embodiment 1:
A) melting, with the stainless steel steel scrap, carbon steel steel scrap and iron alloy drop into intermediate frequency furnace and just refine, obtain steel-making water just, be adjusted into to the molten steel sampling analysis of first refining and with the quality % content of the chemical element of molten steel: the carbon of 0.55 quality % (C), 13.30 the chromium of quality % (Cr), 0.45 the silicon of quality % (Si), 0.50 the manganese of quality % (Mn), 0.002 the phosphorus (P) of the sulphur of quality % (S) and 0.026 quality %, surplus is iron (Fe), molten steel through above-mentioned sampling and the first refining after adjusting chemical element is poured (changing over to) LF refining furnace ladle refining into, go up the covering slag charge on the surface of molten steel (liquid level), the i.e. covering slag bed of material on the liquid level of molten steel, slag charge (also claims fluorite＜CaF by calcium oxide (also claim unslaked lime＜CaO 〉) with Calcium Fluoride (Fluorspan)
2) form, the weight part proportioning of calcium oxide and Calcium Fluoride (Fluorspan) is 4: 1, the throwing amount of aforesaid slag charge is 2% of a molten steel weight, stir refining in heated by electrodes and ladle bottom blowing argon gas (Ar), specifically be to be the bottom blowing argon gas upwards continuously of molten steel from liquid raw material, the pressure-controlling of argon gas is 0.4MPa, make the impurity in the molten steel be easy to be absorbed by the slag blanket on the molten steel face, refining through 1566 ℃ and 22min, obtain through purified cast steel water to be poured, and treat the quality % content that casting molten steel sampling analysis reached and then adjusted the chemical element of cast steel water to be poured, promptly guarantee the quality % content of the chemical element of molten steel: the carbon of 0.55 quality % (C), 13.30 the chromium of quality % (Cr), 0.45 the silicon of quality % (Si), 0.5 the manganese of quality % (Mn), 0.002 the phosphorus (P) of the sulphur of quality % (S) and 0.026 quality %, surplus is iron (Fe), in refining process, make the gas in the molten steel, nonmetallic impurity and harmful chemical element sulphur (S) etc. are effectively removed, and make the alloying element of molten steel and liquid steel temperature more become even;
B) casting will be by steps A) resulting cast steel water to be poured pours in being preheated to 80-120 ℃ ingot mold in advance, obtains steel ingot;
C) annealing and surface finish, will be by step B) resulting steel ingot puts into annealing furnace and anneals, be heated to 920 ℃ of insulation 9.5h, annealing finishes to come out of the stove when the back is cooled to below 500 ℃ in annealing furnace, naturally cool to normal temperature after coming out of the stove again, then cooled steel ingot is carried out surface finish, surface finish also can be described as surface working, surface working is that the surface spots of steel ingot is removed as the defective that scabs, slagging scorification, crackle, sand holes etc. do not allow to exist, and obtains the steel ingot base that qualified hot rolled strip is used;
D) hot rolled strip earlier will be by step C) the steel ingot base used of the hot rolled strip that obtains packs into and heats in the process furnace, and Heating temperature is 1165 ℃, and the steel ingot that then will go out process furnace is sent into hot continuous mill and is rolled into the hot-rolled steel made-up belt that thickness is 4mm;
E) cold-rolled steel strip, to by step D) resulting thickness is that the hot-rolled steel made-up belt of 4mm repeats annealing, pickling, cleaning and cold rolling, here said repeat annealing, pickling, clean and cold rolling being meant annealing, pickling, more than cleaning and cold rolling process repeat once in the same manner, promptly one more than the passage, the annealing temperature of first passage is 860 ℃, soaking time is 6h, and all the other passages promptly are 760 ℃ from the annealing temperature of second passage, soaking time is 6h, reach the cold-rolled steel made-up belt that blade production firm makes the thickness of the required 0.1mm of blade until the thickness that makes cold-rolled steel strip, wherein: after the annealing of first passage, steel band is cooled in stove comes out of the stove again below 500 ℃ and continue in air, to cool off, be that the sulphuric acid soln of 15-20% carries out pickling then with pickle solution such as mass percent concentration, pickling temperature is 50-70 ℃, the purpose of pickling is to remove surface scale, to introduce rolled by cold rolling machine through the steel band of overpickling then, when finished for the first time cold rolling after, repeat said process again and promptly repeat annealing, pickling, cleaning and cold rolling that is to say annealing, pickling and matting and cold rolling process hocket;
F) itemize, will be by step e) resulting thickness is that the cold-rolled steel made-up belt of 0.1mm is divided into strip, specifically be that to adopt itemize equipment to be divided into width be the band of 22.4mm and simultaneously with the band rolling, packing, the thickness that obtains being used for supplying blade manufacturer directly to make blade is that 0.1mm and width are the 6Cr14 stainless steel strip of 22.4mm.
Embodiment 2:
A) melting, with the stainless steel steel scrap, carbon steel steel scrap and iron alloy drop into intermediate frequency furnace and just refine, obtain steel-making water just, be adjusted into to the molten steel sampling analysis of first refining and with the quality % content of the chemical element of molten steel: the carbon of 0.58 quality % (C), 13.76 the chromium of quality % (Cr), 0.35 the silicon of quality % (Si), 0.32 the manganese of quality % (Mn), 0.001 the phosphorus (P) of the sulphur of quality % (S) and 0.022 quality %, surplus is iron (Fe), molten steel through above-mentioned sampling and the first refining after adjusting chemical element is poured (changing over to) LF refining furnace ladle refining into, go up the covering slag charge on the surface of molten steel (liquid level), the i.e. covering slag bed of material on the liquid level of molten steel, slag charge (also claims fluorite＜CaF by calcium oxide (also claim unslaked lime＜CaO 〉) with Calcium Fluoride (Fluorspan)
2) form, the weight part proportioning of calcium oxide and Calcium Fluoride (Fluorspan) is 4.5: 1, the throwing amount of aforesaid slag charge is 3% of a molten steel weight, stirring refining at heated by electrodes and ladle bottom blowing argon gas (Ar) specifically is to be the bottom blowing argon gas upwards continuously of molten steel from liquid raw material, the pressure-controlling of argon gas is 0.3MPa, make the impurity in the molten steel be easy to be absorbed by the slag blanket on the molten steel face, refining through 1585 ℃ and 15min, obtain through purified cast steel water to be poured, and treat the quality % content that casting molten steel sampling analysis reached and then adjusted the chemical element of cast steel water to be poured, promptly guarantee the quality % content of the chemical element of molten steel: the carbon of 0.58 quality % (C), 13.76 the chromium of quality % (Cr), the silicon of 035 quality % (Si), 0.32 the manganese of quality % (Mn), 0.001 the phosphorus (P) of the sulphur of quality % (S) and 0.022 quality %, surplus is iron (Fe), in refining process, make the gas in the molten steel, nonmetallic impurity and harmful chemical element sulphur (S) etc. are effectively removed, and make the alloying element of molten steel and liquid steel temperature more become even;
B) casting will be by steps A) resulting cast steel water to be poured pours in being preheated to 80-120 ℃ ingot mold in advance, obtains steel ingot;
C) annealing and surface finish, will be by step B) resulting steel ingot puts into annealing furnace and anneals, be heated to 950 ℃ of insulation 8h, annealing finishes to come out of the stove when the back is cooled to below 500 ℃ in annealing furnace, naturally cool to normal temperature after coming out of the stove again, then cooled steel ingot is carried out surface finish, surface finish also can be described as surface working, surface working is that the surface spots of steel ingot is removed as the defective that scabs, slagging scorification, crackle, sand holes etc. do not allow to exist, and obtains the steel ingot base that qualified hot rolled strip is used;
D) hot rolled strip earlier will be by step C) the steel ingot base used of the hot rolled strip that obtains packs into and heats in the process furnace, 1135 ℃ of the Heating temperatures of process furnace, the steel ingot that then will go out process furnace is sent into hot continuous mill and is rolled into the hot-rolled steel made-up belt that thickness is 4.8mm;
E) cold-rolled steel strip, to by step D) resulting thickness is that the hot-rolled steel made-up belt of 4.8mm repeats annealing, pickling, cleaning and cold rolling, here said repeat annealing, pickling, clean and cold rolling being meant annealing, pickling, more than cleaning and cold rolling process repeat once in the same manner, promptly one more than the passage, the annealing temperature of first passage is 840 ℃, soaking time is 8h, and all the other passages promptly are 780 ℃ from the annealing temperature of second passage, soaking time is 7.5h, reach the cold-rolled steel made-up belt that blade production firm makes the thickness of the required 0.18mm of blade until the thickness that makes cold-rolled steel strip, wherein: after the annealing of first passage, steel band is cooled in stove comes out of the stove again below 500 ℃ and continue in air, to cool off, be that the sulphuric acid soln of 15-20% carries out pickling then with pickle solution such as mass percent concentration, pickling temperature is 50-70 ℃, the purpose of pickling is to remove surface scale, to introduce rolled by cold rolling machine through the steel band of overpickling then, when finished for the first time cold rolling after, repeat said process again and promptly repeat annealing, pickling is cleaned and is cold rolling;
F) itemize, will be by step e) resulting thickness is that the cold-rolled steel made-up belt of 0.18mm is divided into strip, specifically be that to adopt itemize equipment to be divided into width be the band of 90mm and simultaneously with the band rolling, packing, the thickness that obtains being used for supplying blade manufacturer directly to make blade is that 0.18mm and width are the 6Cr14 stainless steel strip of 90mm.
Embodiment 3:
A) melting, with the stainless steel steel scrap, carbon steel steel scrap and iron alloy drop into intermediate frequency furnace and just refine, obtain steel-making water just, be adjusted into to the molten steel sampling analysis of first refining and with the quality % content of the chemical element of molten steel: the carbon of 0.64 quality % (C), 14.32 the chromium of quality % (Cr), 0.38 the silicon of quality % (Si), 0.42 the manganese of quality % (Mn), 0.002 the phosphorus (P) of the sulphur of quality % (S) and 0.021 quality %, surplus is iron (Fe), molten steel through above-mentioned sampling and the first refining after adjusting chemical element is poured (changing over to) LF refining furnace ladle refining into, go up the covering slag charge on the surface of molten steel (liquid level), the i.e. covering slag bed of material on the liquid level of molten steel, slag charge (also claims fluorite＜CaF by calcium oxide (also claim unslaked lime＜CaO 〉) with Calcium Fluoride (Fluorspan)
2) form, the weight part proportioning of calcium oxide and Calcium Fluoride (Fluorspan) is 5: 1, the throwing amount of aforesaid slag charge is 2.5% of a molten steel weight, stirring refining at heated by electrodes and ladle bottom blowing argon gas (Ar) specifically is to be the bottom blowing argon gas upwards continuously of molten steel from liquid raw material, the pressure-controlling of argon gas is 0.2MPa, make the impurity in the molten steel be easy to be absorbed by the slag blanket on the molten steel face, refining through 1575 ℃ and 18min, obtain through purified cast steel water to be poured, and treat the quality % content that casting molten steel sampling analysis reached and then adjusted the chemical element of cast steel water to be poured, promptly guarantee the quality % content of the chemical element of molten steel: the carbon of 0.64 quality % (C), 14.32 the chromium of quality % (Cr), 0.38 the silicon of quality % (Si), 0.42 the manganese of quality % (Mn), 0.002 the phosphorus (P) of the sulphur of quality % (S) and 0.021 quality %, surplus is iron (Fe), in refining process, make the gas in the molten steel, nonmetallic impurity and harmful chemical element sulphur (S) etc. are effectively removed, and make the alloying element of molten steel and liquid steel temperature more become even;
B) casting will be by steps A) resulting cast steel water to be poured pours in being preheated to 80-120 ℃ ingot mold in advance, obtains steel ingot;
C) annealing and surface finish, will be by step B) resulting steel ingot puts into annealing furnace and anneals, be heated to 935 ℃ of insulation 10h, annealing finishes to come out of the stove when the back is cooled to below 500 ℃ in annealing furnace, naturally cool to normal temperature after coming out of the stove again, then cooled steel ingot is carried out surface finish, surface finish also can be described as surface working, surface working is that the surface spots of steel ingot is removed as the defective that scabs, slagging scorification, crackle, sand holes etc. do not allow to exist, and obtains the steel ingot base that qualified hot rolled strip is used;
D) hot rolled strip earlier will be by step C) the steel ingot base used of the hot rolled strip that obtains packs into and heats in the process furnace, 1151 ℃ of the Heating temperatures of process furnace, the steel ingot that then will go out process furnace is sent into hot continuous mill and is rolled into the hot-rolled steel made-up belt that thickness is 4.5mm;
E) cold-rolled steel strip, to by step D) resulting thickness is that the hot-rolled steel made-up belt of 4.5mm repeats annealing, pickling, cleaning and cold rolling, here said repeat annealing, pickling, clean and cold rolling being meant annealing, pickling, more than cleaning and cold rolling process repeat once in the same manner, promptly one more than the passage, the annealing temperature of first passage is 850 ℃, soaking time is 7h, and all the other passages promptly are 750 ℃ from the annealing temperature of second passage, soaking time is 6.5h, reach the cold-rolled steel made-up belt that blade production firm makes the thickness of the required 0.16mm of blade until the thickness that makes cold-rolled steel strip, wherein: after the annealing of first passage, steel band is cooled in stove comes out of the stove again below 500 ℃ and continue in air, to cool off, be that the sulphuric acid soln of 15-20% carries out pickling then with pickle solution such as mass percent concentration, pickling temperature is 50-70 ℃, the purpose of pickling is to remove surface scale, to introduce rolled by cold rolling machine through the steel band of overpickling then, when finished for the first time cold rolling after, repeat said process again and promptly repeat annealing, pickling is cleaned and is cold rolling;
F) itemize, will be by step e) resulting thickness is that the cold-rolled steel made-up belt of 0.16mm is divided into strip, specifically be that to adopt itemize equipment to be divided into width be the band of 60mm and simultaneously with the band rolling, packing, the thickness that obtains being used for supplying blade manufacturer directly to make blade is that 0.16mm and width are the 6Cr14 stainless steel strip of 60mm.
Embodiment 4:
A) melting, with the stainless steel steel scrap, carbon steel steel scrap and iron alloy drop into intermediate frequency furnace and just refine, obtain steel-making water just, be adjusted into to the molten steel sampling analysis of first refining and with the quality % content of the chemical element of molten steel: the carbon of 0.60 quality % (C), 13.60 the chromium of quality % (Cr), 0.40 the silicon of quality % (Si), 0.40 the manganese of quality % (Mn), 0.0015 the phosphorus (P) of the sulphur of quality % (S) and 0.024 quality %, surplus is iron (Fe), molten steel through above-mentioned sampling and the first refining after adjusting chemical element is poured (changing over to) LF refining furnace ladle refining into, go up the covering slag charge on the surface of molten steel (liquid level), the i.e. covering slag bed of material on the liquid level of molten steel, slag charge (also claims fluorite＜CaF by calcium oxide (also claim unslaked lime＜CaO 〉) with Calcium Fluoride (Fluorspan)
2) form, the weight part proportioning of calcium oxide and Calcium Fluoride (Fluorspan) is 4.2: 1, the throwing amount of aforesaid slag charge is 2.8% of a molten steel weight, stirring refining at heated by electrodes and ladle bottom blowing argon gas (Ar) specifically is to be the bottom blowing argon gas upwards continuously of molten steel from liquid raw material, the pressure-controlling of argon gas is 0.25MPa, make the impurity in the molten steel be easy to be absorbed by the slag blanket on the molten steel face, refining through 1580 ℃ and 21min, obtain through purified cast steel water to be poured, and treat the quality % content that casting molten steel sampling analysis reached and then adjusted the chemical element of cast steel water to be poured, promptly guarantee the quality % content of the chemical element of molten steel: the carbon of 0.60 quality % (C), 13.60 the chromium of quality % (Cr), 0.40 the silicon of quality % (Si), 0.40 the manganese of quality % (Mn), 0.0015 the phosphorus (P) of the sulphur of quality % (S) and 0.024 quality %, surplus is iron (Fe), in refining process, make the gas in the molten steel, nonmetallic impurity and harmful chemical element sulphur (S) etc. are effectively removed, and make the alloying element of molten steel and liquid steel temperature more become even;
B) casting will be by steps A) resulting cast steel water to be poured pours in being preheated to 80-120 ℃ ingot mold in advance, obtains steel ingot;
C) annealing and surface finish, will be by step B) resulting steel ingot puts into annealing furnace and anneals, be heated to 940 ℃ of insulation 8.5h, annealing finishes to come out of the stove when the back is cooled to below 500 ℃ in annealing furnace, naturally cool to normal temperature after coming out of the stove again, then cooled steel ingot is carried out surface finish, surface finish also can be described as surface working, surface working is that the surface spots of steel ingot is removed as the defective that scabs, slagging scorification, crackle, sand holes etc. do not allow to exist, and obtains the steel ingot base that qualified hot rolled strip is used;
D) hot rolled strip earlier will be by step C) the steel ingot base used of the hot rolled strip that obtains packs into and heats in the process furnace, 1145 ℃ of the Heating temperatures of process furnace, the steel ingot that then will go out process furnace is sent into hot continuous mill and is rolled into the hot-rolled steel made-up belt that thickness is 5mm;
E) cold-rolled steel strip, to by step D) resulting thickness is that the hot-rolled steel made-up belt of 5mm repeats annealing, pickling, cleaning and cold rolling, here said repeat annealing, pickling, clean and cold rolling being meant annealing, pickling, more than cleaning and cold rolling process repeat once in the same manner, promptly one more than the passage, the annealing temperature of first passage is 870 ℃, soaking time is 6.5h, and all the other passages promptly are 770 ℃ from the annealing temperature of second passage, soaking time is 7h, reach the cold-rolled steel made-up belt that blade production firm makes the thickness of the required 0.12mm of blade until the thickness that makes cold-rolled steel strip, wherein: after the annealing of first passage, steel band is cooled in stove comes out of the stove again below 500 ℃ and continue in air, to cool off, be that the sulphuric acid soln of 15-20% carries out pickling then with pickle solution such as mass percent concentration, pickling temperature is 50-70 ℃, the purpose of pickling is to remove surface scale, to introduce rolled by cold rolling machine through the steel band of overpickling then, when finished for the first time cold rolling after, repeat said process again and promptly repeat annealing, pickling is cleaned and is cold rolling;
F) itemize, will be by step e) resulting thickness is that the cold-rolled steel made-up belt of 0.12mm is divided into strip, specifically be that to adopt itemize equipment to be divided into width be the band of 15mm and simultaneously with the band rolling, packing, the thickness that obtains being used for supplying blade manufacturer directly to make blade is that 0.12mm and width are the 6Cr14 stainless steel strip of 15mm.
Compared with the prior art has the technique effect shown in the following table by the resulting 6Cr14 stainless steel strip of the present invention of the foregoing description 1-4.
Claims (10)
1. 6Cr14 stainless steel strip, it is characterized in that it consists of: the manganese of the chromium of the carbon of 0.50-0.70 quality %, 13.00-15.00 quality %, the silicon of 0.30-0.55 quality %, 0.30-0.52 quality %,＜sulphur of 0.03 quality % and the phosphorus of＜0.035 quality %, surplus is an iron.
2. 6Cr14 stainless steel strip, it is characterized in that it consists of: the manganese of the chromium of the carbon of 0.55-0.65 quality %, 13.30-14.35 quality %, the silicon of 0.35-0.51 quality %, 0.32-0.50 quality %, the sulphur of 0.001-0.002 quality % and the phosphorus of 0.021-0.026 quality %, surplus is an iron.
3. the preparation method of a 6Cr14 stainless steel strip as claimed in claim 1 or 2 may further comprise the steps:
A) the molten white silk, stainless steel steel scrap, carbon steel steel scrap and iron alloy are dropped into refining just in the intermediate frequency furnace, obtain steel-making water just, quality % content to the chemical element of steel-making water at the beginning of first experienced molten steel sampling analysis and the adjustment, the water of then will just making steel changes the refining furnace ladle refining over to, and on the liquid level of molten steel, cover slag charge, mix refining under the state in heated by electrodes and steel ladle bottom argon blowing gas mixing, control refining temperature and time, obtain through purified cast steel water to be poured, and treat the quality % content that casting molten steel sampling analysis reached and then adjusted the chemical element of cast steel water to be poured;
B) casting pours into cast steel water to be poured in the ingot mold, obtains steel ingot;
C) annealing and surface finish are packed steel ingot into and are heated control Heating temperature and control soaking time in the annealing furnace, treat to come out of the stove when steel ingot is cooled to below 500 ℃ in annealing furnace, naturally cooling after coming out of the stove carries out surface finish to cooled steel ingot, obtains the steel ingot base that hot rolled strip is used;
D) hot rolled strip, with hot rolled strip use the steel ingot base pack into and heat in the process furnace, the control Heating temperature, it is rolling to send into hot continuous mill after going out process furnace, and control hot rolled rolling thickness, obtains the hot-rolled steel made-up belt;
E) cold-rolled steel strip is done one to the hot-rolled steel made-up belt and is repeated annealing, pickling, cleaning and cold rolling more than the passage, and controls the cold rolling thickness of final passage, obtains the cold-rolled steel made-up belt;
F) itemize is divided into band and rolling packing with the cold-rolled steel made-up belt, controls the width of band, obtains being used to make the 6Cr14 stainless steel strip of blade.
4. the preparation method of 6Cr14 stainless steel strip according to claim 3, it is characterized in that steps A) described in the temperature of first steel-making water be 1570-1600 ℃, the quality % content of chemical element of water and described and then adjust the quality % content that the quality % content of the chemical element of cast steel water to be poured is chemical element and be adjusted into is just made steel in described adjustment: the carbon of 0.50-0.70 quality %, 13.00-15.00 the chromium of quality %, 0.30-0.55 the silicon of quality %, 0.30-0.52 the manganese of quality %, the phosphorus of the sulphur of＜0.03 quality % and＜0.03 quality %, Yu Weitie.
5. the preparation method of 6Cr14 stainless steel strip according to claim 3 is characterized in that steps A) described in slag charge form by calcium oxide and Calcium Fluoride (Fluorspan), the weight part ratio of calcium oxide and Calcium Fluoride (Fluorspan) is 4-5: 1, the amount of slag charge is the 2-3% of molten steel weight; Described ladle bottom blowing argon gas is continuous bottom blowing, and the pressure of argon gas is 0.2-0.4MPa.
6. the preparation method of 6Cr14 stainless steel strip according to claim 3 is characterized in that steps A) described in control refining temperature and time be that refining temperature and time are controlled to be 1560-1590 ℃ and 15-25min respectively.
7. the preparation method of 6Cr14 stainless steel strip according to claim 3 is characterized in that step C) described in the control Heating temperature be that temperature is controlled to be 900-950 ℃, described control soaking time is that soaking time is controlled to be 8-10h; Described surface finish be meant to anneal the back and through the surface removal of cooled steel ingot scab, the surface spots of slagging scorification, crackle and sand holes.
8. the preparation method of 6Cr14 stainless steel strip according to claim 3 is characterized in that step D) described in the control Heating temperature be to be 1130-1170 ℃ with heating and temperature control; Described control hot rolled rolling thickness is that rolling thickness is controlled to be 4-5mm.
9. the preparation method of 6Cr14 stainless steel strip according to claim 3, it is characterized in that step e) described in repeat anneal, pickling, cleaning and cold rolling in the annealing temperature of first passage be 840-870 ℃, soaking time is 6-8h, and the annealing temperature of all the other passages and soaking time are 750-780 ℃ and 6-8h; The pickle solution that described pickling is used is that mass percent concentration is the sulphuric acid soln of 15-20%, and pickling temperature is 50-70 ℃, and the cold rolling thickness of the final passage of described control is to be 0.1-2.0mm with gauge control.
10. the preparation method of 6Cr14 stainless steel strip according to claim 3 is characterized in that step F) described in the width of control band be that width is controlled to be 10-100mm.
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