CN103820716B - A kind of 9Cr13MoVCo stainless steel strip and preparation method - Google Patents
A kind of 9Cr13MoVCo stainless steel strip and preparation method Download PDFInfo
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Abstract
The present invention is a kind of 9Cr13MoVCo stainless steel strip and preparation method, wherein the chemical element composition of steel and quality % thereof are: the cobalt of the chromium of the carbon of the 0.88-0.95% ,��silicon of the 0.60% ,��manganese of the 0.60% ,��phosphorus of the 0.030% ,��sulphur of 0.030%, 13.00-13.50%, the molybdenum of 0.20-0.25%, the vanadium of 0.10-0.15% and 0.20-0.30%, Yu Weitie, wherein, gas content in steel is: [N]=200-400ppm, [H]��2.5ppm, [O]=20-40ppm. The present invention has that hardness height, wear resisting property are excellent, good corrosion resistance and there is desirable toughness, what greatest feature of the present invention was also science adds appropriate cobalt, it is possible to effectively improve the quenching hardness of material, in order to meet specific demand.
Description
Technical field
The present invention relates to a kind of technical field of stainless steel materials, it is specifically related to a kind of 9Cr13MoVCo high-carbon height quenching hardness martensite special stainless steel, and relates to the manufacture method of this high-carbon height quenching hardness martensite special stainless steel.
Background technology
Along with science and technology and the improving constantly of living standards of the people, Vehicles Collected from Market is tending towards variation for the demand of Martensite Stainless Steel, the higher requirement of the more surface hardness for Martensite Stainless Steel, intensity, erosion resistance, wear resisting property is constantly emerging in large numbers, traditional martensite stainless steel material can not meet client completely for high rigidity, the performance demand of the Martensite Stainless Steel of high strength. In order to adapt to this kind of new market requirement, a new high-carbon height quenching hardness martensite special stainless steel of our factory's independent research, namely 9Cr13MoVCo is in order to meet the demand of client for high-carbon specialty martensitic body stainless steel.
The present stage domestic requirement that all Martensite Stainless Steel is proposed higher quenching hardness in fields such as high-grade Hair dressing scissors, the police dagger of army, high-grade collection cutters, and domestic still there is no same type of material in order to meet these demands, the love that can only rely on import Japan completely knows the AUS10 of steel processed. In view of above-mentioned situation to our factory from the autonomous angle of industry, having carried out long-term and positive exploration and trial, and finally succeeded, the technical scheme introduced below is exactly produce under this background.
Summary of the invention
It is an object of the invention to provide a kind of formula rationally to contribute to embodying excellent hardness, wear resistance, erosion resistance, particularly there is extremely excellent quenching hardness and use and break away from dependence import and can significantly reduce a kind of 9Cr13MoVCo stainless steel strip of the use cost of user.
The present invention also aims to provide the preparation method of a kind of 9Cr13MoVCo stainless steel strip, the method there is into material height and use economize on resources, technical process is brief and uses save energy without the need to frequently using electric energy heating and can effectively be removed by harmful element and obtain so that the inclusion content in steel significantly reduces and use quality assurance.
The present invention provides a kind of 9Cr13MoVCo stainless steel strip, its chemical element composition and quality % thereof be: the cobalt of the chromium of the carbon of the 0.88-0.95% ,��silicon of the 0.60% ,��manganese of the 0.60% ,��phosphorus of the 0.030% ,��sulphur of 0.030%, 13.00-13.50%, the molybdenum of 0.20-0.25%, the vanadium of 0.10-0.15% and 0.20-0.30%, surplus is iron, wherein, gas content in steel is: [N]=200-400ppm, [H]��2.5ppm, [O]=20-40ppm.
The present invention also provides the preparation method of a kind of 9Cr13MoVCo stainless steel strip, comprises the following steps:
A) melting, by die steel steel scrap, carbon steel steel scrap and iron alloy drop into just refining in intermediate frequency furnace, obtain just making steel water, to just steel-making water sampling analysis and adjust and just make steel the quality % content of chemical element of water, then it is blended into LF refining furnace refining by just making steel water, oxygen blast gas and argon gas simultaneously, and control refining temperature and refining time and control Argon amount, obtain LF stove refined molten steel, to LF stove refined molten steel sampling analysis and adjust the quality % content of the chemical element of LF stove refined molten steel, again through VD vacuum oven to the hydrogen in steel, the gas content of oxygen and nitrogen controls, obtain cast steel water to be poured, treat casting liquid steel sampling analysis and and then adjust the chemical element quality % content of cast steel water to be poured,
B) cast, cast steel water to be poured is poured in Special electric slag ingot mold, obtains electroslag bar;
C) electricity slag, enters electroslag bar electroslag furnace and carries out esr, obtain the ESR ingot of refining again;
D) forge, steel ingot is loaded process furnace heating, and controls Heating temperature, send into forging hammer after going out process furnace and forge into corresponding size, obtain forging blank;
E) anneal, blank will be forged and load heating in annealing furnace, control Heating temperature and control soaking time, naturally cooling after coming out of the stove;
F) sawing machine, is sawn into, by the blank that forges after annealing, the various sizes facilitating hot rolling through sawing machine;
G) Band by Hot-rolling, will forge blank and load process furnace heating, and control Heating temperature, and send into hot rolls hot rolling, then obtain hot rolling blank or hot-rolled finished product after naturally cooling after going out process furnace;
H) steel band is cold rolling, by the pickling after annealing of the hot rolling blank after hot rolling, then obtains cold rolling finished product through cold rolling.
In a better embodiment of the present invention, described steps A) described in the quality % content of the first chemical element of steel-making water of adjustment be that the mass percentage of chemical element is adjusted to: the vanadium of the carbon of the 0.88-0.95% ,��silicon of the 0.60% ,��manganese of the 0.60% ,��phosphorus of the 0.030% ,��sulphur of 0.030%, the chromium of 13.00-13.50%, the molybdenum of 0.20-0.25% and 0.10-0.15%, the cobalt of 0.20-0.30%, surplus is iron.
In a better embodiment of the present invention, described steps A) described in control LF stove refining temperature and refining time be that refining temperature and time are controlled as 1540-1570 DEG C and 45-50min; Described control Argon amount is that Argon amount is controlled to 145-155m3/h.
In a better embodiment of the present invention, described steps A) described in be that the gas content of the hydrogen in steel, oxygen and nitrogen is controlled as [N]=200-400ppm through VD stove to the Control of gas content of the hydrogen in steel, oxygen and nitrogen, [H]��2.5ppm, [O]=20-40ppm.
In a better embodiment of the present invention, the described control mode to the Control of gas content of the hydrogen in steel, oxygen and nitrogen is by the volume ratio of oxygen and argon gas being adjusted to I phase phase 3: 1, III phase 3: 0, II 1: 3 successively and the gas content of hydrogen, oxygen and nitrogen that IV phase 0: 1 controlled in refined molten steel.
In a better embodiment of the present invention, described step D) in forge before control Heating temperature be 1180 DEG C, heat-up time is 10 hours, and holding temperature is 600 DEG C, and soaking time is 6 hours.
In a better embodiment of the present invention, described step e) in control annealing time holding temperature be 870 DEG C, the heating-up time is 5 hours, and soaking time is 10 hours.
In a better embodiment of the present invention, described step G) in after hot rolling the thickness of hot-rolled finished product steel band size be 4.0mm ~ 20.0mm, width is 80mm ~ 250mm.
In a better embodiment of the present invention, described step H) in cold rolling after the thickness of cold rolling finished product steel belt size be 0.3mm ~ 4.0mm, width is 50mm ~ 250mm.
The Advantageous Effects of the present invention is: technical scheme provided by the invention selects rationally due to chemical element and mass percentage thereof and the control of the amount of hydrogen, oxygen and nitrogen obnoxious flavour is proper, and hardness (HRC) can reach 50-55 degree; Non-metallic inclusion reaches B class 0.5 grade, C class 0.5 grade, D class 1 grade and DS class 1 grade; Rust-preventing characteristic (salt-fog test) reaches 1 grade; There is hardness height, wear resisting property excellence, good corrosion resistance and desirable toughness; Meanwhile, what greatest feature of the present invention was also science adds appropriate cobalt, it is possible to effectively improve the quenching hardness of material, in order to meet specific demand. The preparation method provided there is into material height and be able to save energy, technical process short and can save energy, by hydrogen, oxygen and the control of nitrogen obnoxious flavour content with effectively remove harmful element and inclusion and quality can be guaranteed.
Embodiment
Below the better embodiment of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made more explicit defining.
Embodiment 1:
To prepare the 9Cr13MoVCo stainless steel hot-rolling band steel that width is 18mm as 250mm and thickness:
A) melting, by high carbon martensite stainless steel approximate to same steel grade or chemical composition, carbon steel waste material and progressively joining in intermediate frequency furnace according to different times through the good relevant iron alloy of accurate calculation is tentatively smelted, obtain just making steel water, to just steel-making water sampling analysis and adjust and just make steel the quality % content of chemical element of water and be: the carbon of 0.88%, the silicon of 0.56%, the manganese of 37%, the phosphorus of 0.015%, the sulphur of 0.007%, the chromium of 13.22%, the molybdenum of 0.20% and the vanadium of 0.15%, the cobalt of 0.30%, Yu Weitie, by above-mentioned through sampling analysis and carry out removing the gred after adjusting the quality % content of chemical element and reduce thus show that composition is qualified, slag is white, the first steel-making water of good fluidity, just the tapping temperature of steel-making water controls at 1617 DEG C, it is blended in LF stove ladle to carry out LF stove refining by just making steel water afterwards, refining furnace criticizes AD powder with 2-3 reduce, residue adjustment adopts lime, fluorite, after energising >=10min, slag is white and good fluidity, keep this state >=15min, maintain the temperature at 1550-1580 DEG C, after concocting gold >=5min eventually, guarantee that chemical composition is qualified, slag is good, temperature 1600-1610 DEG C of termination LF stove refining process, in order to make the alloying element of molten steel and liquid steel temperature more even in ladle refining process, blows Ar continuously to ladle bottom2, Ar2Pressure is 0.35MPa, flow is 145m3/ h, making just steel-making water obtain maximum refining, ensure that the temperature of molten steel is accurate, composition even, inclusion content is lower. molten steel through LF refining hangs in VD vacuum bell furnace afterwards carry out vacuumizing operation, by the optimization of technique, both ensure that the gas of nitrogen in steel, hydrogen, oxygen was effectively removed, and in turn ensure that the castability of molten steel, and finally obtained the molten steel to be cast of high-quality, in this process, pumpdown time is the most condition of high vacuum degree of 15-20min is 8Pa, hydrogen in molten steel, the gas content of oxygen and nitrogen is respectively 24ppm, 27ppm and 22ppm, temperature reaches 1550-1580 DEG C, again through sampling analysis and adjust quality % content and the H of chemical element, O, N gas content obtains final molten steel to be poured, and treat casting liquid steel sampling analysis and the quality % content of adjustment chemical element, wherein: the quality % content of the quality % content of the chemical element of described adjustment refined molten steel and described adjustment cast steel water to be poured be the quality % content of chemical element is adjusted to 0.88% carbon, the silicon of 0.56%, the manganese of 37%, the phosphorus of 0.015%, the sulphur of 0.007%, the chromium of 13.22%, the molybdenum of 0.20% and the vanadium of 0.15%, the cobalt of 0.30%, Yu Weitie,
B) cast, by steps A) the cast steel water to be poured that obtains pours in the special Electro Slag Remelting Steel ingot mould being preheated to 100-120 DEG C in advance, obtains electroslag bar;
C) esr, by step B) electroslag bar that obtains enters and carries out esr in electroslag furnace and obtain ESR ingot;
D) forging, by step C) the ESR ingot ingot that obtains loads process furnace heating, and Heating temperature is 1180 DEG C, heat-up time is 10 hours, and holding temperature is 600 DEG C, and soaking time is 6 hours, send into forging hammer after going out process furnace and forge into corresponding size, obtain forging blank;
E) anneal, by step D) blank that forges that obtains loads in annealing furnace and heats up, and warming temperature is 870 DEG C, and the heating-up time is 5 hours, after reaching 870 DEG C, is incubated 10 hours, then cools to less than 460 DEG C with the furnace, come out of the stove, naturally cool to normal temperature;
F) sawing machine, by step e) obtain annealed forge the size that blank is sawn into applicable hot rolling;
G) steel band rolling, by step F) obtain through sawing machine forge blank load process furnace be heated to 1150 DEG C, send into hot rolls hot rolling after going out process furnace, rolling is of a size of thick 18mm, wide 250mm, then after naturally cooling, obtain finished product: 9Cr13MoVCo stainless steel strip.
Embodiment 2:
To prepare the 9Cr13MoVCo stainless steel strip that width is 4.0mm as 250mm and thickness:
A) melting, by die steel steel scrap, carbon steel steel scrap and iron alloy drop into just refining in intermediate frequency furnace, obtain just making steel water, to just steel-making water sampling analysis and adjust and just make steel the quality % content of chemical element of water and be: the carbon of 0.90%, the silicon of 0.46%, the manganese of 40%, the phosphorus of 0.013%, the sulphur of 0.005%, the chromium of 13.45%, the molybdenum of 0.25% and the vanadium of 0.10%, the cobalt of 0.25%, Yu Weitie, by above-mentioned through sampling analysis and carry out removing the gred after adjusting the quality % content of chemical element and reduce thus show that composition is qualified, slag is white, the first steel-making water of good fluidity, just the tapping temperature of steel-making water controls at 1615 DEG C, it is blended in LF stove ladle to carry out LF stove refining by just making steel water afterwards, refining furnace criticizes AD powder with 2-3 reduce, residue adjustment adopts lime, fluorite, after energising >=10min, slag is white and good fluidity, keep this state >=15min, maintain the temperature at 1550-1580 DEG C, after concocting gold >=5min eventually, guarantee that chemical composition is qualified, slag is good, temperature 1600-1610 DEG C of termination LF stove refining process, in order to make the alloying element of molten steel and liquid steel temperature more even in ladle refining process, blows Ar continuously to ladle bottom2, Ar2Pressure is 0.35MPa, flow is 145m3/ h. molten steel through LF refining hangs in VD vacuum bell furnace afterwards carry out vacuumizing operation, pumpdown time is the most condition of high vacuum degree of 15-20min is 10Pa, hydrogen in molten steel, the gas content of oxygen and nitrogen is respectively [N]=252ppm, [H]=2.2ppm, [O]=26ppm, temperature reaches 1550-1580 DEG C, again through sampling analysis and adjust quality % content and the H of chemical element, O, N gas content obtains final molten steel to be poured, and treat casting liquid steel sampling analysis and the quality % content of adjustment chemical element, wherein: the quality % content of the chemical element of described adjustment refined molten steel and the quality % content of described adjustment cast steel water to be poured are adjusted to by the quality % content of chemical element: the carbon of 0.90%, the silicon of 0.46%, the manganese of 40%, the phosphorus of 0.013%, the sulphur of 0.005%, the chromium of 13.45%, the molybdenum of 0.25% and the vanadium of 0.10%, the cobalt of 0.25%, Yu Weitie,
B) cast, by steps A) the cast steel water to be poured that obtains pours in the special Electro Slag Remelting Steel ingot mould being preheated to 100-120 DEG C in advance, obtains electroslag bar;
C) esr, by step B) electroslag bar that obtains enters and carries out esr in electroslag furnace and obtain ESR ingot;
D) forging, by step C) the ESR ingot ingot that obtains loads process furnace heating, and Heating temperature is 1180 DEG C, heat-up time is 10 hours, and holding temperature is 600 DEG C, and soaking time is 6 hours, send into forging hammer after going out process furnace and forge into corresponding size, obtain forging blank;
E) anneal, by step D) blank that forges that obtains loads in annealing furnace and heats up, and warming temperature is 870 DEG C, and the heating-up time is 5 hours, after reaching 870 DEG C, is incubated 10 hours, then cools to less than 460 DEG C with the furnace, come out of the stove, naturally cool to normal temperature;
F) sawing machine, by step e) obtain annealed forge the size that blank is sawn into applicable hot rolling;
G) Band by Hot-rolling, by step F) obtain through sawing machine forge blank load process furnace be heated to 1150 DEG C, send into hot rolls hot rolling after going out process furnace, rolling is of a size of thick 5.5mm, wide 250mm, then after naturally cooling, obtain 9Cr13MoVCo stainless steel strip blank;
H) steel band is cold rolling, by step G) the hot rolling blank through hot rolling that obtains anneal with reference to step e after pickling, then through cold rolling mill rolling thickness 1.0mm, width 250mm, finally obtain cold rolling finished product.
Compared with the prior art the 9Cr13MoVCo stainless steel strip of the present invention obtained by above-mentioned case study on implementation has the technique effect shown in following table:
The foregoing is only embodiments of the invention; not thereby the patent scope of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all it is included in the scope of patent protection of the present invention with reason.
Claims (6)
1. the preparation method of a 9Cr13MoVCo stainless steel strip, it is characterised in that, comprise the following steps:
A) melting, by die steel steel scrap, carbon steel steel scrap and iron alloy drop into just refining in intermediate frequency furnace, obtain just making steel water, to just steel-making water sampling analysis and adjust and just make steel the quality % content of chemical element of water, then it is blended into LF refining furnace refining by just making steel water, oxygen blast gas and argon gas simultaneously, and control refining temperature and refining time and control Argon amount, obtain LF stove refined molten steel, to LF stove refined molten steel sampling analysis and adjust the quality % content of the chemical element of LF stove refined molten steel, again through VD vacuum oven to the hydrogen in steel, the gas content of oxygen and nitrogen controls, obtain cast steel water to be poured, treat casting liquid steel sampling analysis and and then adjust the chemical element quality % content of cast steel water to be poured,
Wherein, the mass percentage of chemical element is adjusted to: the vanadium of the carbon of the 0.88-0.95% ,��silicon of the 0.60% ,��manganese of the 0.60% ,��phosphorus of the 0.030% ,��sulphur of 0.030%, the chromium of 13.00-13.50%, the molybdenum of 0.20-0.25% and 0.10-0.15%, the cobalt of 0.20-0.30%, surplus is iron;
The gas content of the hydrogen in steel, oxygen and nitrogen is controlled as [N]=200-400ppm, [H]��2.5ppm, [O]=20-40ppm;
Described control LF stove refining temperature and refining time are that refining temperature and time are controlled as 1540-1570 DEG C and 45-50min; Described control Argon amount is that Argon amount is controlled to 145-155m3/ h;
B) cast, cast steel water to be poured is poured in Special electric slag ingot mold, obtains electroslag bar;
C) electricity slag, enters electroslag bar electroslag furnace and carries out esr, obtain the ESR ingot of refining again;
D) forge, steel ingot is loaded process furnace heating, and controls Heating temperature, send into forging hammer after going out process furnace and forge into corresponding size, obtain forging blank;
E) anneal, blank will be forged and load heating in annealing furnace, control Heating temperature and control soaking time, naturally cooling after coming out of the stove;
F) sawing machine, is sawn into, by the blank that forges after annealing, the various sizes facilitating hot rolling through sawing machine;
G) Band by Hot-rolling, will forge blank and load process furnace heating, and control Heating temperature, and send into hot rolls hot rolling, then obtain hot rolling blank or hot-rolled finished product after naturally cooling after going out process furnace;
H) steel band is cold rolling, by the pickling after annealing of the hot rolling blank after hot rolling, then obtains cold rolling finished product through cold rolling.
2. the preparation method of 9Cr13MoVCo stainless steel strip according to claim 1, it is characterized in that, the described control mode to the Control of gas content of the hydrogen in steel, oxygen and nitrogen is by the volume ratio of oxygen and argon gas being adjusted to I phase phase 3: 1, III phase 3: 0, II 1: 3 successively and the gas content of hydrogen, oxygen and nitrogen that IV phase 0: 1 controlled in refined molten steel.
3. the preparation method of 9Cr13MoVCo stainless steel strip according to claim 1, it is characterised in that, described step D) in forge before control Heating temperature be 1180 DEG C, heat-up time is 10 hours, and holding temperature is 600 DEG C, and soaking time is 6 hours.
4. the preparation method of 9Cr13MoVCo stainless steel strip according to claim 1, it is characterised in that, described step e) in control annealing time holding temperature be 870 DEG C, the heating-up time is 5 hours, and soaking time is 10 hours.
5. the preparation method of 9Cr13MoVCo stainless steel strip according to claim 1, it is characterised in that, described step G) in after hot rolling the thickness of hot-rolled finished product steel band size be 4.0mm ~ 20.0mm, width is 80mm ~ 250mm.
6. the preparation method of 9Cr13MoVCo stainless steel strip according to claim 1, it is characterised in that, described step H) in cold rolling after the thickness of cold rolling finished product steel belt size be 0.3mm ~ 4.0mm, width is 50mm ~ 250mm.
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| JPS53103917A (en) * | 1977-02-23 | 1978-09-09 | Daido Steel Co Ltd | Martensitic stainless steel having good resistance to rolling load |
| CN1811004A (en) * | 2005-01-14 | 2006-08-02 | 大同特殊钢株式会社 | Cold working die steel |
| CN102943211A (en) * | 2012-11-27 | 2013-02-27 | 黄山市新光不锈钢材料制品有限公司 | Method for manufacturing high-carbon martensitic stainless steel bands |
| CN102965580A (en) * | 2012-11-27 | 2013-03-13 | 黄山市新光不锈钢材料制品有限公司 | High-carbon martensitic stainless steel |
| CN103540856A (en) * | 2013-10-30 | 2014-01-29 | 常熟市长江不锈钢材料有限公司 | 3Cr17NiMoV stainless steel strip and preparation method |
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2014
- 2014-02-26 CN CN201410066127.3A patent/CN103820716B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53103917A (en) * | 1977-02-23 | 1978-09-09 | Daido Steel Co Ltd | Martensitic stainless steel having good resistance to rolling load |
| CN1811004A (en) * | 2005-01-14 | 2006-08-02 | 大同特殊钢株式会社 | Cold working die steel |
| CN102943211A (en) * | 2012-11-27 | 2013-02-27 | 黄山市新光不锈钢材料制品有限公司 | Method for manufacturing high-carbon martensitic stainless steel bands |
| CN102965580A (en) * | 2012-11-27 | 2013-03-13 | 黄山市新光不锈钢材料制品有限公司 | High-carbon martensitic stainless steel |
| CN103540856A (en) * | 2013-10-30 | 2014-01-29 | 常熟市长江不锈钢材料有限公司 | 3Cr17NiMoV stainless steel strip and preparation method |
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