CN103540856A - 3Cr17NiMoV stainless steel strip and preparation method - Google Patents
3Cr17NiMoV stainless steel strip and preparation method Download PDFInfo
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Abstract
The invention discloses a 3Cr17NiMoV stainless steel strip and a preparation method, which relate to the technical field of stainless steel materials. The 3Cr17NiMoV stainless steel strip comprises the following chemical elements in percentage by mass: 0.30-0.40 percent of carbon, less than or equal to 0.60 percent of silicon, less than or equal to 0.60 percent of manganese, less than or equal to 0.025 percent of phosphor, less than or equal to 0.015 percent of sulfur, 16.00-17.50 percent of chromium, 0.6-1.0 percent of nickel, 0.80-1.30 percent of molybdenum, 0.72-0.76 percent of vanadium and the balance of iron, wherein the contents of gases in the steel are as follows: the content of [N] is equal to 200-400 ppm, the content of [H] is less than or equal to 2.5 ppm and the content of [O] is equal to 20-40 ppm. According to the technical scheme, since the chemical elements and the mass percentage contents thereof are rationally selected and the contents of the harmful gases such as the hydrogen, oxygen and nitrogen are properly controlled, the 3Cr17NiMoV stainless steel strip has high hardness, superior wear resistance, good corrosion resistance and ideal toughness. The preparation method has the advantages of high yield so as to save energy, short process flow, capability of saving energy and capability of guaranteeing the quality by controlling the contents of the harmful gases of the hydrogen, oxygen and nitrogen and effectively removing the harmful elements and inclusions.
Description
Technical field
The present invention relates to a kind of technical field of stainless steel materials, be specifically related to the high polishing mirror-surface plastic die steel of a kind of 3Cr17NiMoV, and relate to the manufacture method of this high polishing mirror-surface plastic die steel.
Background technology
Along with improving constantly of science and technology and living standards of the people, current die steel industry is all more and more higher for the requirement of surface hardness, purity and the smooth finish of die steel material, erosion resistance, wear resisting property, traditional die steel material can not meet client completely for the performance requirement of die steel material, and the performance factor of above-mentioned these die steel will affect mould product quality and all kinds of technical indicator greatly.In order to adapt to this new market requirement, our factory's independent research a new high polishing mirror-surface plastic die steel, 3Cr17NiMoV is in order to substitute original conventional plastic die steel.
During the external use plastic die steel of Current Domestic, there are some general parts, also there are some differences, the DIN1.2316 of import all can select when producing high-quality plastic mould material in most of mould manufacturer, manyly while producing general plastic mould material can select 2Cr13.Although present stage, these two kinds of selections can meet normal plastic die steel demand reluctantly, drawback is also fairly obvious: select the external import of the serious dependence of DIN1.2316, not only with high costs, the crucial supply of material can not guarantee in time; If select the key propertys such as hardness, purity, wear resisting property and corrosion resistance nature of 2Cr13 material to require can not meet high-quality needs again.
In view of the foregoing China's mould of plastics manufacturer is all at the key propertys such as hardness, erosion resistance, wear resisting property, surperficial purity and smooth finish of paying close attention to die steel, to expect to break away from the passive situation that is subject to for a long time the restriction of import factor.Dui Ci， our factory, from the autonomous angle of industry, has carried out long-term and positive exploration and trial, and finally succeeds, and the technical scheme that will introduce below produces under this background.
Summary of the invention
The object of the present invention is to provide a kind of a kind of 3Cr17NiMoV stainless steel strip of filling a prescription and rationally contributing to embody excellent hardness, wear resistance, erosion resistance, surperficial purity and smooth finish and using the use cost of breaking away from dependence on import and can significantly reducing user.
The present invention also aims to provide a kind of preparation method of 3Cr17NiMoV stainless steel strip, the method have into material high and use economize on resources, technical process is brief and without frequent use electric energy heating and use save energy and harmful element effectively can be removed and so that the inclusion content in steel significantly reduces, use quality assurance.
The present invention is a kind of 3Cr17NiMoV stainless steel strip, its chemical element forms and quality % is: the carbon of 0.30-0.40% ,≤0.60% silicon ,≤0.60% manganese ,≤0.025% phosphorus ,≤0.015% sulphur, the chromium of 16.00-17.50%, the nickel of 0.6-1.0% are, the vanadium of the molybdenum of 0.80-1.30% and 0.72-0.76%, Yu Weitie, wherein: the gas content in steel is: [N]=200-400ppm, [H]≤2.5ppm, [O]=20-40ppm.
The present invention is a kind of preparation method of 3Cr17NiMoV 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 steel-making water, quality % content to the chemical element of the analysis of first steel-making water sampling and the first steel-making of adjustment water, the water of then just making steel is blended into the refining of LF refining furnace, while oxygen blast gas and argon gas, and control refining temperature and refining time and control Argon amount, obtain LF stove refined molten steel, quality % content to the chemical element of LF stove refined molten steel sampling analysis and adjustment LF stove refined molten steel, pass through again VD vacuum oven to the hydrogen in steel, the gas content of oxygen and nitrogen is controlled, 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) casting, pours into cast steel water to be poured in special-purpose electroslag ingot mold, obtains electroslag bar;
C) electroslag, enters electroslag furnace by electroslag bar and carries out esr, obtains the ESR ingot of refining again;
D) forge, pack steel ingot into process furnace heating, and control Heating temperature, go out to send into forging hammer after process furnace and forge into corresponding size, obtain forging blank;
E) annealing, will forge blank and pack in annealing furnace and heat, and 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 size that facilitate hot rolling through sawing machine;
G) steel band rolling, will forge blank and pack process furnace heating into, and control Heating temperature, send into hot rolls hot rolling after going out process furnace, then after naturally cooling, obtain finished product.
Preferably, described steps A) it is that the quality percentage composition of chemical element is adjusted into that the quality % content of chemical element of water is just made steel in the adjustment described in: the carbon of 0.30-0.40% ,≤0.60% silicon ,≤0.60% manganese ,≤0.025% phosphorus ,≤0.015% sulphur, the chromium of 16.00-17.50%, the nickel of 0.6-1.0%, the vanadium of the molybdenum of 0.80-1.30% and 0.72-0.76%, Yu Weitie.
Preferably, the control LF stove refining temperature described steps A) and refining time are that refining temperature and time are controlled respectively as 1540-1570 ℃ and 45-50min; Described control Argon amount is that Argon amount is controlled as 145-155m
3/ h.
Preferably, described steps A) described in is that the gas content of the hydrogen in steel, oxygen and nitrogen is controlled respectively 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.
Preferably, 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 successively to 3: 0 I phases, 3: 1 II phases, 1: 3 III phase and 0: 1 IV phase, to control the gas content of hydrogen, oxygen and nitrogen in refined molten steel.
Preferably, described step D) in, forging front control Heating temperature is 1160 ℃, and be 10 hours heat-up time, and holding temperature is 600 ℃, and soaking time is 6 hours.
While controlling annealing preferably, described step e), holding temperature is 850 ℃, and the heating-up time is 5 hours, and soaking time is 10 hours.
Preferably, described step G) after hot rolling steel band to be of a size of thick * wide be 18mm*270mm or 28mm*249mm.
Useful technique effect of the present invention is: technical scheme provided by the invention is due to chemical element and quality percentage composition is selected rationally 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 1 grade of 0.5 grade of category-B, 0.5 grade of C class, 1 grade of D class and DS class; Rust-preventing characteristic (salt-fog test) reaches 1 grade; Have that hardness is high, wear resisting property is excellent, good corrosion resistance and desirable toughness.The preparation method who provides have into material high and be able to save energy, technical process is short and can save energy, can ensure quality by hydrogen, oxygen and nitrogen obnoxious flavour content being controlled and effectively removed harmful element and inclusion.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Embodiment 1:
Take that to prepare the 3Cr17NiMoV stainless steel strip that width is 18mm as 270mm and thickness be example.
A) melting, by same steel grade or the approximate die steel waste material of chemical composition, carbon steel or close knot steel waste material and progressively join in intermediate frequency furnace and tentatively smelt according to different times through the good relevant iron alloy of accurate calculation, obtain just steel-making water, quality % content to the chemical element of the analysis of first steel-making water sampling and the first steel-making of adjustment water is: 0.32% carbon, 0.46% silicon, 34% manganese, 0.013% phosphorus, 0.006% sulphur, 16.32% chromium, 0.68% nickel, 0.95% molybdenum and 0.72% vanadium, Yu Weitie, thereby by above-mentioned after sampling analysis and the quality % content through adjusting chemical element, remove the gred and reduce show that composition is qualified, slag is white, the first steel-making water of good fluidity, just the tapping temperature of steel-making water is controlled at 1617 ℃.The water of just making steel is afterwards blended into and in LF stove ladle, carries out the refining of LF stove; in refining furnace, with 2-3, criticizing AD powder reduces; residue adjustment adopts lime, fluorite; white and the good fluidity of slag after energising>=10min; keep this state>=15min; maintain the temperature at 1550-1580 ℃; eventually after blending gold>=5min; guarantee that chemical composition is qualified; slag is good; temperature 1600-1610 ℃ of termination LF stove refining process in order to make alloying element and the liquid steel temperature of molten steel more even, blows continuously Ar to ladle bottom in ladle refining process
2, Ar
2pressure is that 0.35MPa, flow are 145m
3/ h.Make just steel-making water obtain maximum refining, guaranteed that the temperature of molten steel is accurate, composition is even, inclusion content is lower.Afterwards the molten steel through LF refining is hung in to VD vacuum bell furnace and carry out vacuum pumping, by the optimization of technique, both guaranteed that the gas of nitrogen in steel, hydrogen, oxygen was effectively removed, guaranteed again the castability of molten steel, finally obtain the molten steel to be cast of high-quality.In this process, pumpdown time is that 15-20min maximum vacuum is 8pa, hydrogen in molten steel, the gas content of oxygen and nitrogen is respectively 24ppm, 27ppm and 22ppm, temperature reaches 1550-1580 ℃, again through sampling analysis and adjust quality % content and the H of chemical element, 02, N gas content obtains final molten steel to be poured, and the quality % content for the treatment of casting liquid steel sampling analysis and adjusting 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 is that the quality % content of chemical element is adjusted into: 0.32% carbon, 0.46% silicon, 34% manganese, 0.013% phosphorus, 0.006% sulphur, 16.32% chromium, 0.68% nickel, 0.95% molybdenum and 0.72% vanadium, Yu Weitie,
B) casting, by by steps A) the cast steel water to be poured that obtains pours in being preheated in advance the special Electro Slag Remelting Steel ingot mould of 100-120 ℃, obtains electroslag bar;
C) esr, by by step B) electroslag bar that obtains enters and in electroslag furnace, carries out esr and obtain ESR ingot;
D) forging, by by step C) the ESR ingot ingot that obtains packs process furnace heating into, and Heating temperature is 1160 ℃, be 10 hours heat-up time, and holding temperature is 600 ℃, and soaking time is 6 hours, go out to send into forging hammer after process furnace and forge into corresponding size, obtain forging blank
E) annealing, will be by step D) blank that forges that obtains packs in annealing furnace and heats up, and intensification temperature is 850 ℃, and the heating-up time is 5 hours, reaches after 850 ℃, is incubated 10 hours, then cools to the furnace below 460 ℃, comes out of the stove, and naturally cools to normal temperature.
F) sawing machine, by by step e) the annealed blank that forges that obtains is sawn into the size that is applicable to hot rolling.
G) steel band rolling, will be by step F) blank that forges through sawing machine that obtains packs process furnace into and is heated to 1150 ℃, sends into hot rolls hot rolling after going out process furnace, and rolling is of a size of thick 18mm, wide 270mm, then after naturally cooling, obtain finished product: 3Cr17NiMoV stainless steel strip.
Embodiment 2:
Take that to prepare the 3Cr17NiMoV stainless steel strip that width is 28mm as 249mm and thickness be example.
A) melting, by die steel steel scrap, carbon steel steel scrap and iron alloy drop into just refining in intermediate frequency furnace, obtain just steel-making water, quality % content to the chemical element of the analysis of first steel-making water sampling and the first steel-making of adjustment water is: 0.34% carbon, 0.40% silicon, 32% manganese, 0.009% phosphorus, 0.004% sulphur, 16.25% chromium, 0.73% nickel, 0.92% molybdenum and 0.74% vanadium, Yu Weitie, thereby by above-mentioned after sampling analysis and the quality % content through adjusting chemical element, remove the gred and reduce show that composition is qualified, slag is white, the first steel-making water of good fluidity, just the tapping temperature of steel-making water is controlled at 1615 ℃.The water of just making steel is afterwards blended into and in LF stove ladle, carries out the refining of LF stove; in refining furnace, with 2-3, criticizing AD powder reduces; residue adjustment adopts lime, fluorite; white and the good fluidity of slag after energising>=10min; keep this state>=15min; maintain the temperature at 1550-1580 ℃; eventually after blending gold>=5min; guarantee that chemical composition is qualified; slag is good; temperature 1600-1610 ℃ of termination LF stove refining process in order to make alloying element and the liquid steel temperature of molten steel more even, blows continuously Ar to ladle bottom in ladle refining process
2, Ar
2pressure is that 0.35MPa, flow are 145m
3/ h.Afterwards the molten steel through LF refining is hung in to VD vacuum bell furnace and carry out vacuum pumping, pumpdown time is that 15-20min maximum vacuum 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 ℃, again through sampling analysis and adjust quality % content and the H of chemical element, 02, N gas content obtains final molten steel to be poured, and the quality % content for the treatment of casting liquid steel sampling analysis and adjusting 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 is that the quality % content of chemical element is adjusted into: 0.34% carbon, 0.40% silicon, 32% manganese, 0.009% phosphorus, 0.004% sulphur, 16.25% chromium, 0.73% nickel, 0.92% molybdenum and 0.74% vanadium, Yu Weitie,
B) casting, by by steps A) the cast steel water to be poured that obtains pours in being preheated in advance the special Electro Slag Remelting Steel ingot mould of 100-120 ℃, obtains electroslag bar;
C) esr, by by step B) electroslag bar that obtains enters and in electroslag furnace, carries out esr and obtain ESR ingot;
D) forging, by by step C) the ESR ingot ingot that obtains packs process furnace heating into, and Heating temperature is 1160 ℃, be 10 hours heat-up time, and holding temperature is 600 ℃, and soaking time is 6 hours, go out to send into forging hammer after process furnace and forge into corresponding size, obtain forging blank
E) annealing, will be by step D) blank that forges that obtains packs in annealing furnace and heats up, and intensification temperature is 850 ℃, and the heating-up time is 5 hours, reaches after 850 ℃, is incubated 10 hours, then cools to the furnace below 460 ℃, comes out of the stove, and naturally cools to normal temperature.
F) sawing machine, by by step e) the annealed blank that forges that obtains is sawn into the size that is applicable to hot rolling.
G) steel band rolling, will be by step F) blank that forges through sawing machine that obtains packs process furnace into and is heated to 1150 ℃, sends into hot rolls hot rolling after going out process furnace, and rolling is of a size of thick 28mm, wide 249mm, then after naturally cooling, obtain finished product: 3Cr17NiMoV stainless steel strip.
Compared with the prior art the 3Cr17NiMoV stainless steel strip of the present invention being obtained by above-mentioned case study on implementation has the technique effect shown in following table.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (9)
1. a 3Cr17NiMoV stainless steel strip, it is characterized in that, its chemical element forms and quality % is: the carbon of 0.30-0.40% ,≤0.60% silicon ,≤0.60% manganese ,≤0.025% phosphorus ,≤0.015% sulphur, the chromium of 16.00-17.50%, the nickel of 0.6-1.0% are, the vanadium of the molybdenum of 0.80-1.30% and 0.72-0.76%, Yu Weitie, wherein: the gas content in steel is: [N]=200-400ppm, [H]≤2.5ppm, [O]=20-40ppm.
2. a preparation method for 3Cr17NiMoV stainless steel strip, is characterized in that, 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 steel-making water, quality % content to the chemical element of the analysis of first steel-making water sampling and the first steel-making of adjustment water, the water of then just making steel is blended into the refining of LF refining furnace, while oxygen blast gas and argon gas, and control refining temperature and refining time and control Argon amount, obtain LF stove refined molten steel, quality % content to the chemical element of LF stove refined molten steel sampling analysis and adjustment LF stove refined molten steel, pass through again VD vacuum oven to the hydrogen in steel, the gas content of oxygen and nitrogen is controlled, 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) casting, pours into cast steel water to be poured in special-purpose electroslag ingot mold, obtains electroslag bar;
C) electroslag, enters electroslag furnace by electroslag bar and carries out esr, obtains the ESR ingot of refining again;
D) forge, pack steel ingot into process furnace heating, and control Heating temperature, go out to send into forging hammer after process furnace and forge into corresponding size, obtain forging blank;
E) annealing, will forge blank and pack in annealing furnace and heat, and 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 size that facilitate hot rolling through sawing machine;
G) steel band rolling, will forge blank and pack process furnace heating into, and control Heating temperature, send into hot rolls hot rolling after going out process furnace, then after naturally cooling, obtain finished product.
3. the preparation method of 3Cr17NiMoV stainless steel strip according to claim 2, it is characterized in that, described steps A) it is that the quality percentage composition of chemical element is adjusted into that the quality % content of chemical element of water is just made steel in the adjustment described in: the carbon of 0.30-0.40% ,≤0.60% silicon ,≤0.60% manganese ,≤0.025% phosphorus ,≤0.015% sulphur, the chromium of 16.00-17.50%, the nickel of 0.6-1.0%, the vanadium of the molybdenum of 0.80-1.30% and 0.72-0.76%, Yu Weitie.
4. the preparation method of 3Cr17NiMoV stainless steel strip according to claim 2, it is characterized in that described steps A) described in control LF stove refining temperature and refining time be that refining temperature and time are controlled respectively as 1540-1570 ℃ and 45-50min; Described control Argon amount is that Argon amount is controlled as 145-155m
3/ h.
5. the preparation method of 3Cr17NiMoV stainless steel strip according to claim 2, it is characterized in that, described steps A) described in is that the gas content of the hydrogen in steel, oxygen and nitrogen is controlled respectively 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.
6. the preparation method of 3Cr17NiMoV stainless steel strip according to claim 2, 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 successively to 3: 0 I phases, 3: 1 II phases, 1: 3 III phase and 0: 1 IV phase, to control the gas content of hydrogen, oxygen and nitrogen in refined molten steel.
7. the preparation method of 3Cr17NiMoV stainless steel strip according to claim 2, is characterized in that, described step D) in to forge front control Heating temperature be 1160 ℃, be 10 hours heat-up time, holding temperature is 600 ℃, soaking time is 6 hours.
8. the preparation method of 3Cr17NiMoV stainless steel strip according to claim 2, is characterized in that, described step e) in while controlling annealing holding temperature be 850 ℃, the heating-up time is 5 hours, soaking time is 10 hours.
9. the preparation method of 3Cr17NiMoV stainless steel strip according to claim 2, is characterized in that, described step G) in after hot rolling steel band to be of a size of thick * wide be 18mm*270mm or 28mm*249mm.
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| CN103820711A (en) * | 2014-02-26 | 2014-05-28 | 常熟市长江不锈钢材料有限公司 | 5Cr13 stainless steel strip steel and preparation method thereof |
| CN103820716A (en) * | 2014-02-26 | 2014-05-28 | 常熟市长江不锈钢材料有限公司 | 9Cr13MoVCo stainless steel strip steel and preparation method thereof |
| CN111534662A (en) * | 2020-06-12 | 2020-08-14 | 河北鑫泰轴承锻造有限公司 | DHRE round steel production process |
| CN112226667A (en) * | 2020-09-30 | 2021-01-15 | 攀钢集团江油长城特殊钢有限公司 | Preparation method of chromium stainless pre-hard plastic die steel |
| CN113584380A (en) * | 2021-07-05 | 2021-11-02 | 昆山东大特钢制品有限公司 | High-hardness and high-toughness antirust die steel and production process thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103820711A (en) * | 2014-02-26 | 2014-05-28 | 常熟市长江不锈钢材料有限公司 | 5Cr13 stainless steel strip steel and preparation method thereof |
| CN103820716A (en) * | 2014-02-26 | 2014-05-28 | 常熟市长江不锈钢材料有限公司 | 9Cr13MoVCo stainless steel strip steel and preparation method thereof |
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| CN111534662A (en) * | 2020-06-12 | 2020-08-14 | 河北鑫泰轴承锻造有限公司 | DHRE round steel production process |
| CN112226667A (en) * | 2020-09-30 | 2021-01-15 | 攀钢集团江油长城特殊钢有限公司 | Preparation method of chromium stainless pre-hard plastic die steel |
| CN112226667B (en) * | 2020-09-30 | 2022-02-01 | 攀钢集团江油长城特殊钢有限公司 | Preparation method of chromium stainless pre-hard plastic die steel |
| CN113584380A (en) * | 2021-07-05 | 2021-11-02 | 昆山东大特钢制品有限公司 | High-hardness and high-toughness antirust die steel and production process thereof |
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| CN103540856B (en) | 2016-01-06 |
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