CN101082113A - Novel rare earth chromic manganese nitrogen series stainless steel - Google Patents
Novel rare earth chromic manganese nitrogen series stainless steel Download PDFInfo
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- CN101082113A CN101082113A CN 200610051695 CN200610051695A CN101082113A CN 101082113 A CN101082113 A CN 101082113A CN 200610051695 CN200610051695 CN 200610051695 CN 200610051695 A CN200610051695 A CN 200610051695A CN 101082113 A CN101082113 A CN 101082113A
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Abstract
The present invention relates to one kind of RE-Cr-Mn-N stainless steel, and belongs to the field of metal material technology. The stainless steel has the components including C 0.04-0.15 wt%, Si 0.20-0.95 wt%, Mn 6.5-12.0 wt%, P not more than 0.080 wt%, S not more than 0.040 wt%, Cr 12.0-17.0 wt%, Ni 0.90-1.5 wt%, Cu 1.0-3.0 wt%, N 0.04-0.20 wt%, RE 0.010-0.020 wt%, and Fe for the rest. The addition of N element can enlarge the austenite area, reduce C and Mn adding amount, improve the corrosion resistance of the stainless steel, lower Ni content to 0.90-1.5 wt% and lower production cost. The addition of Cu in 1.0-3.0 wt% can raise the stamping performance and corrosion resistance of the stainless steel. The stainless steel with high mechanical performance may be hot rolled, cold rolled and stamped.
Description
Technical field
The present invention relates to a kind of novel rare earth chromic manganese nitrogen series stainless steel; Belong to metal material field.
Background technology
Chromic manganese nitrogen series stainless steel belongs to the nickel-saving type austenitic steel, the nickel-saving type austenitic steel replaces the valuable rare metal Ni of part to form elements such as austenitic C, Mn, N, Cu,, develop the nickel-saving type stainless steel and have realistic meaning under the form that the stainless steel demand is increased sharply in present global nickel resources anxiety.As a kind of middle manganese austenite abrasion-resistant cast steel of Chinese patent application (95118510.1), its chemical ingredients and content thereof are as follows: C:0.75～1.0, Mn:7～8.5, Si:0.4～0.7; Cr:1.2～1.5, Re:0.02～0.04, P :≤0.06, S :≤0.04, Mo:0.9～1.2 are though the made middle Mn austenitic steel of this patent application is compared with high mangaenese steel, under the constant situation of working conditions such as smelting, casting and thermal treatment, has the low shortcoming of cost; But the content of Cr is too low in the chemical ingredients of this patent application; anti-oxidant resistance to elevated temperatures is relatively poor; can't form stainless steel; Mn austenitic steel is utilized other element replacing whole Ni in described in addition; therefore its processing characteristics is relatively poor; and can't strengthen the provide protection of chromium oxide film to matrix, the corrosion resistance of material is relatively poor.
Summary of the invention
The anti-oxidant resistance to elevated temperatures that the present invention is directed to austenite abrasion-proof cast steel of the prior art is relatively poor, can't form stainless steel, and the relatively poor shortcoming of the corrosion resistance of material provides a kind of anti-oxidant resistance to elevated temperatures better, improves the novel rare earth chromic manganese nitrogen series stainless steel of inner quality, hot workability, mechanical property and the corrosion resistance of material comprehensively.
Technique scheme of the present invention is implemented by following technical problem: a kind of novel rare earth chromic manganese nitrogen series stainless steel is characterized in that this stainless composition weight percent is: C:0.04-0.15%, Si:0.20-0.95%, Mn:6.5-12.0%, P≤0.080%, S≤0.040%, Cr:12.0-17.0%, Ni:0.90-1.5%, Cu:1.0-3.0%, N:0.04-0.20%, RE:0.010-0.020%, Fe surplus.
C, Mn, N, Cu, Ni are and form the austenite element in the material of the present invention, and Si, Cr be for forming the ferrite element, quote chromium when composition designs, nickel equivalent is controlled each elemental range, and chromium, nickel equivalent ratio are controlled at certain data interval.Measure through metallographic: material austenite ratio surpasses 98%, and ratio of ferrite is less than 2%, and the material among the present invention is stable austenite structure at normal temperatures, and is nonmagnetic.
The mechanism of action of each composition of the present invention wherein
C: except that stable austenite, also can improve the strength of materials, but cause intergranular corrosion in the crystal boundary carbide precipitate easily during the too high levels materials processing of C;
Si: be mainly used to the red hardness of deoxidation, cleaning molten steel, raising material and certain oxidation-resistance is arranged, but the too high levels of Si can improve ratio of ferrite, increase high-temperature brittleness, be unfavorable for materials processing;
Mn: the element of stable austenite effectively replaces part Ni;
Cr: topmost element in the stainless steel, it is not oxidized to form the oxide film protection matrix at material surface, and when Cr in the material 〉=12%, this material has stronger fire-resistant oxidation resistant characteristic, can be described as stainless steel; But Cr＞17% o'clock can cause ratio of ferrite to improve in the present invention, influence the stable of austenite structure and influences hot workability;
Ni: be in the stainless steel important element, noble metal is organized with stable austenite with element instead of part nickel such as C, Mn, N among the present invention, and is reduced cost significantly.The interpolation weight percentage is that the Ni of 0.90-1.5% is because Ni can improve the materials processing performance, and strengthens the provide protection of chromium oxide film to matrix, improves the resistance to corrosion of material.
Cu: form the austenite element, effectively improve the material cold-forming property, but the too high cost that not only increases of the too high levels of Cu, but also can cause the material hot workability to worsen;
N: form the austenite element strongly, one of main joint nickel element, but big in the scope control difficulty of the weight percentage of N element, among the present invention the weight percentage of N element being controlled at 0.04-0.20% is the technology emphasis and the difficult point of producing this material; The inventor carries out the content of Argon with control N after AOD and tapping.
RE: be refining deterioration agent in the present invention, add in the stainless steel by certain technology and can play following effect:
1) RE can effectively play molten admittedly the reinforcement and dispersion-strengthened action, and suppresses the as-cast structure carbide and separate out at intergranular, thereby increases substantially the mechanical property and the corrosion resistance of material;
2) RE energy purify hot metal is eliminated gas, improves form, size, the distribution of crystal boundary inclusion, plays the grain-boundary strengthening effect, thereby improves thermoplasticity, the hot workability of steel, reduces the broken limit of hot rolling defective, improves lumber recovery;
3) the obvious crystal grain thinning of RE energy improves the crystal boundary bonding strength, improves the over-all properties of material;
4) RE can promote material surface to form the oxide skin protective membrane rapidly, improves the oxide film tackiness, improves the erosion resistance and the thermotolerance of material.
At above-mentioned a kind of novel rare earth chromic manganese nitrogen series stainless steel, the optimization weight percent of described composition is: C:0.05-0.10%, Si:0.20-0.90%, Mn:8.5-10.0%, P≤0.060%, S≤0.030%, Cr:13.5-15.0%, Ni:1.0-1.3%, Cu:1.5-2.0%, N:0.06-0.15%, RE:0.015-0.018%, Fe surplus.
The production technique of steel grade of the present invention is:
1, batching, electric furnace: according to the composition requirement of steel grade, in conjunction with various raw-material compositions, melt by the corresponding proportion electric furnace of packing into, slag making adds iron alloy, adjusts composition, taps after reaching tapping temperature.Be 120 minutes tap to tap time, and tapping temperature is more than or equal to 1630 ℃
2, AOD: by the mixed gas that is blown into Ar, O, N molten steel is stirred, divide steel grades to require to add manganese, copper etc. and adjust composition.Winch to the continuous casting platform after pouring molten steel into big bag thermometric after the qualified back of composition test is adjusted temperature to 1670 ± 10 and ℃ slagged tap.70 minutes tap to tap time of AOD.
3, continuous casting: molten steel adds insulating covering agent after injecting tundish, and the adding covering slag prevented secondary oxidation after molten steel injected crystallizer.The tundish thermometric was adjusted pulling rate according to liquid steel temperature in per ten minutes.Base cutting back is pressed heat (batch) number and is concentrated stacking.
4, slab reconditioning: after the base cooling, with polishing machine otch is carried out reconditioning, defectives such as the pore on the surface of reconditioning simultaneously, slag inclusion are declared level back warehouse-in.
5, process furnace, steel rolling, welding: base is by specification, the heat (batch) number process furnace of packing into, be heated to start rolling temperature after, adjust width through rolling on edge, high-pressure water descaling, behind the thickness that breaking down cogging to finish rolling requires, crop, finish rolling, rolling.After treating the red tape cooling, press steel grade, the welding of specification tissue, part weighs 3～5 tons.
6, melt processing, pickling admittedly: red tape reaches satisfactory hardness after solid molten processing, the oxide skin through pickling flush away surface, and the while is at the passive film of surface formation chromium.
7, finished product band: after the steel band pickling, defectives such as residual bubble, slag inclusion are fallen in reconditioning, declare level back warehouse-in.
Therefore the present invention has the following advantages:
1, the present invention utilizes the N element to enlarge the austenitic area, reduce the add-on of C, Mn, improve the stainless solidity to corrosion of the present invention, make the weight percentage of Ni be reduced to 0.90-1.5%, greatly reduce production cost, the Cu that adds weight percentage simultaneously and be 1.0-3.0% overcomes the shortcoming of the stainless non-corrosibility of prior art, punching performance difference.
2, adopt the novel rare earth chromic manganese nitrogen series stainless steel of material preparation of the present invention can satisfy the requirement of hot rolling, cold rolling, punching press; Better and the batch production requirement of mechanical property.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in further detail; But the present invention is not limited to these embodiment.
Embodiment: press the batching of composition shown in the table 1,
1, batching, electric furnace: according to the composition requirement of steel grade, various raw-material compositions in the associative list 1 melt by the corresponding proportion electric furnace of packing into, and slag making adds iron alloy, adjusts composition, tap after reaching tapping temperature.Be 120 minutes tap to tap time, and tapping temperature is more than or equal to 1630 ℃
2, AOD: by the mixed gas that is blown into Ar, O, N molten steel is stirred, divide steel grades to require to add manganese, copper etc. and adjust composition.Winch to the continuous casting platform after pouring molten steel into big bag thermometric after the qualified back of composition test is adjusted temperature to 1670 ± 10 and ℃ slagged tap; 70 minutes tap to tap time of AOD.
3, continuous casting: molten steel adds insulating covering agent after injecting tundish, and the adding covering slag prevented secondary oxidation after molten steel injected crystallizer.The tundish thermometric was adjusted pulling rate according to liquid steel temperature in per ten minutes.Base cutting back is pressed heat (batch) number and is concentrated stacking.
4, slab reconditioning: after the base cooling, with polishing machine otch is carried out reconditioning, defectives such as the pore on the surface of reconditioning simultaneously, slag inclusion are declared level back warehouse-in.
5, process furnace, steel rolling, welding: base by specification, heat (batch) number pack into process furnace, be heated to start rolling temperature after, adjust width through rolling on edge, high-pressure water descaling, behind the thickness that breaking down cogging to finish rolling requires, crop, finish rolling, rolling.After treating the red tape cooling, press steel grade, the welding of specification tissue, part weighs 3～5 tons.
6, melt processing, pickling admittedly: red tape reaches satisfactory hardness after solid molten processing, the oxide skin through pickling flush away surface, and the while is at the passive film of surface formation chromium.
7, finished product band: after the steel band pickling, defectives such as residual bubble, slag inclusion are fallen in reconditioning, declare level back warehouse-in.
Table 1: novel rare earth chromic manganese nitrogen series stainless steel component of the present invention (weight percent)
Utilize above-mentioned technology and composition thereof to be prepared into the thick steel plate of 18mm, to record its mechanical property as shown in table 2:
The mechanical property of table 2: embodiment 1～5
In sum: the solid solution attitude yield strength σ of novel rare earth chromic manganese nitrogen series stainless steel plate of the present invention
s〉=379Mpa, tensile strength sigma
b〉=758Mpa, σ
5〉=52%, A
k〉=163J/cm
2And erosion resistance is better than 201 stainless steels.
Specific embodiment described in the present invention only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although the present invention has been made detailed explanation and has quoted some specific exampless as proof, to those skilled in the art, only otherwise leave that the spirit and scope of the present invention can be done various variations or correction is obvious.
Claims (2)
1, a kind of novel rare earth chromic manganese nitrogen series stainless steel is characterized in that this stainless composition weight percent is: C:0.04-0.15%, Si:0.20-0.95%, Mn:6.5-12.0%, P≤0.080%, S≤0.040%, Cr:11.5-17.0%, Ni:0.90-1.5%, Cu:1.0-3.0%, N:0.04-0.20%, RE:0.010-0.020%, Fe surplus.
2, a kind of novel rare earth chromic manganese nitrogen series stainless steel according to claim 1 is characterized in that this stainless composition weight percent is: C:0.05-0.10%, Si:0.20-0.90%, Mn:8.5-10.0%, P≤0.060%, S≤0.030%, Cr:13.5-15.0%, Ni:1.0-1.3%, Cu:1.5-2.0%, N 0.06-0.15%, RE:0.015-0.018%, Fe surplus.
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| CN 200610051695 CN101082113A (en) | 2006-05-30 | 2006-05-30 | Novel rare earth chromic manganese nitrogen series stainless steel |
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| CN 200610051695 CN101082113A (en) | 2006-05-30 | 2006-05-30 | Novel rare earth chromic manganese nitrogen series stainless steel |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230136A (en) * | 2011-01-25 | 2011-11-02 | 宝山钢铁股份有限公司 | Austenitic stainless steel and manufacturing method thereof |
| CN104294176A (en) * | 2014-09-19 | 2015-01-21 | 东莞市迅盈精密五金有限公司 | Stainless steel nonmagnetic material and counterbalance prepared from same |
| CN106551589A (en) * | 2017-02-08 | 2017-04-05 | 张有明 | A kind of constant temperature drinking device |
| CN107190214A (en) * | 2017-06-10 | 2017-09-22 | 深圳市富鹏达金属材料有限公司 | Steel alloy |
| CN108411222A (en) * | 2018-03-29 | 2018-08-17 | 冯满 | A kind of steel alloy |
| CN108893687A (en) * | 2018-07-23 | 2018-11-27 | 宣中光 | Etch-proof new steel of a kind of low cost height and preparation method thereof |
| CN109732292A (en) * | 2019-03-22 | 2019-05-10 | 合肥昊艺金属制品有限公司 | A kind of corrosion-resistant water tank steel plate and its processing technology |
| CN110499475A (en) * | 2019-08-19 | 2019-11-26 | 广东省材料与加工研究所 | A kind of austenitic heat-resistance steel and its preparation method and application |
| CN112111691A (en) * | 2020-08-12 | 2020-12-22 | 广西柳钢中金不锈钢有限公司 | Copper-free nickel-saving cold-rolled austenitic stainless steel and manufacturing method thereof |
| CN114574781A (en) * | 2022-03-04 | 2022-06-03 | 江苏铭展特钢制造有限公司 | Wear-resistant stainless steel bar for rail transit and preparation method thereof |
| CN114875342A (en) * | 2021-02-05 | 2022-08-09 | 上海卫图科技有限公司 | Nickel-saving civil air defense stainless steel |
-
2006
- 2006-05-30 CN CN 200610051695 patent/CN101082113A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230136A (en) * | 2011-01-25 | 2011-11-02 | 宝山钢铁股份有限公司 | Austenitic stainless steel and manufacturing method thereof |
| CN102230136B (en) * | 2011-01-25 | 2012-12-19 | 宝山钢铁股份有限公司 | Austenitic stainless steel and manufacturing method thereof |
| CN104294176A (en) * | 2014-09-19 | 2015-01-21 | 东莞市迅盈精密五金有限公司 | Stainless steel nonmagnetic material and counterbalance prepared from same |
| CN106551589A (en) * | 2017-02-08 | 2017-04-05 | 张有明 | A kind of constant temperature drinking device |
| CN107190214A (en) * | 2017-06-10 | 2017-09-22 | 深圳市富鹏达金属材料有限公司 | Steel alloy |
| CN108411222A (en) * | 2018-03-29 | 2018-08-17 | 冯满 | A kind of steel alloy |
| CN108893687A (en) * | 2018-07-23 | 2018-11-27 | 宣中光 | Etch-proof new steel of a kind of low cost height and preparation method thereof |
| CN109732292A (en) * | 2019-03-22 | 2019-05-10 | 合肥昊艺金属制品有限公司 | A kind of corrosion-resistant water tank steel plate and its processing technology |
| CN110499475A (en) * | 2019-08-19 | 2019-11-26 | 广东省材料与加工研究所 | A kind of austenitic heat-resistance steel and its preparation method and application |
| CN110499475B (en) * | 2019-08-19 | 2020-07-28 | 广东省材料与加工研究所 | Austenitic heat-resistant steel and preparation method and application thereof |
| CN112111691A (en) * | 2020-08-12 | 2020-12-22 | 广西柳钢中金不锈钢有限公司 | Copper-free nickel-saving cold-rolled austenitic stainless steel and manufacturing method thereof |
| CN114875342A (en) * | 2021-02-05 | 2022-08-09 | 上海卫图科技有限公司 | Nickel-saving civil air defense stainless steel |
| CN114574781A (en) * | 2022-03-04 | 2022-06-03 | 江苏铭展特钢制造有限公司 | Wear-resistant stainless steel bar for rail transit and preparation method thereof |
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