CN104611643A - 316 austenitic stainless steel with nitrogen increased and nickel decreased and preparation method thereof - Google Patents
316 austenitic stainless steel with nitrogen increased and nickel decreased and preparation method thereof Download PDFInfo
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- CN104611643A CN104611643A CN201510029394.8A CN201510029394A CN104611643A CN 104611643 A CN104611643 A CN 104611643A CN 201510029394 A CN201510029394 A CN 201510029394A CN 104611643 A CN104611643 A CN 104611643A
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- nickel
- austenitic stainless
- stainless steel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to 316 austenitic stainless steel with nitrogen increased and nickel decreased and belongs to the technical field of metallurgical products. A nitrogen increase and nickel decrease method is adopted to improve the comprehensive mechanical property of a steel grade and reduce the cost on the basis of 316 austenitic stainless steel. A smelted product comprises chemical components in percentage by weight as follows: 0.04%-0.1% of C, smaller than or equal to 1% of Si, smaller than or equal to 2% of Mn, smaller than or equal to 0.045% of P, smaller than or equal to 0.03% of S, 16%-18% of Cr, 8%-11% of Ni, 2%-3% of Mo, 0%-0.36% of N and the balance of a matrix Fe. With nitrogen increased and nickel decreased, the strength and the hardness of the 316 austenitic stainless steel can be improved, and the comprehensive mechanical property is improved.
Description
Technical field
The present invention relates to metallurgical technology field, particularly relate to a kind of nitrogen pick-up 316 austenitic stainless steels falling nickel and preparation method thereof.
Background technology
316 stainless steels belong to typical chromium nickel series austenitic stainless steel, have the over-all propertieies such as good seawater corrosion resistance, intergranular corrosion, impelling strength, are widely used in interchanger, medical products, pipeline, chemical industry, marine field.China is as Iron and Steel Production state maximum in the world and consumption market, within 2013, stainless steel crude steel output has reached 1898.4 ten thousand tons, although iron and steel enterprise's quantity is more, but industrial concentration is not high, product structure is unreasonable, low side steel proportion is comparatively large, and production capacity surplus is obvious, and a lot of high-end steel grade still needs import.
Because nickel resources cost is higher, scarcity of resources, so under the prerequisite of guaranteed performance, reducing the content of nickel element in 316 austenitic stainless steels, is current industrial main development direction.And nitrogen-contained stainless steel has good intensity, anti-fatigue performance, wear resisting property and creep-resistant property etc., also improve the biocompatibility of medical stainless steel simultaneously; In addition, nitrogen resource is not only abundant cheap, and can substitute the nickel of costliness and keep the stability of austenite phase in austenitic stainless steel, therefore also arises at the historic moment with the resource-conserving stainless steel of nitrogen for nickel.
At present fall about nitrogen pick-up in 316 austenitic stainless steels the preparations and applicatio that nickel strengthens novel 316 austenitic stainless steels of its comprehensive mechanical property and there is not yet relevant report.
Summary of the invention
For solving above technical problem, the invention provides a kind of nitrogen pick-up 316 austenitic stainless steels falling nickel and preparation method thereof, 316 austenitic stainless steels that nickel falls in nitrogen pick-up can improve intensity, the hardness of 316 austenitic stainless steels, improve comprehensive mechanical property, be applicable to the fields such as edible product, medical products, pipeline, chemical industry, and greatly reduce production cost, have broad application prospects.
To achieve these objectives, 316 austenitic stainless steels of nickel fall in a kind of nitrogen pick-up of the present invention, and its chemical composition and weight percent are counted: C:0.04-0.1%; Si :≤1%; Mn :≤2%; P :≤0.045%; S :≤0.03%; Cr:16-18%; Ni:8-11%; Mo:2-3%; N:0-0.36%, all the other are matrix Fe.
A kind ofly prepare the method that 316 austenitic stainless steels of nickel fall in nitrogen pick-up, the technological process of production is: dry-feed-vacuumize-melting sources-distributor killing-distributor interpolation nitride-cast, also comprise solid solution treatment process, solid solution treatment process parameter is: cool fast after 1100 DEG C of solution treatment 1h, and the compound be solidly soluted in matrix is kept in matrix at normal temperature.
The invention difference from existing technology is that the present invention achieves following technique effect:
316 austenitic stainless steels that nickel falls in nitrogen pick-up of the present invention can improve intensity, the hardness of 316 austenitic stainless steels, improve comprehensive mechanical property, 316 austenitic stainless steels that nickel falls in this kind of nitrogen pick-up are applicable to the fields such as edible product, medical products, pipeline, chemical industry, and greatly reduce production cost, have broad application prospects
Below in conjunction with accompanying drawing, the present invention is further described.
Accompanying drawing explanation
Fig. 1 is 316 austenitic stainless steel micro-organization charts;
Fig. 2 is that nickel 316 austenitic stainless steel micro-organization chart falls in nitrogen pick-up of the present invention;
Fig. 3 is 316 austenitic stainless steel room temperature tensile fracture apperance figure;
Fig. 4 is that nickel 316 austenitic stainless steel room temperature tensile fracture apperance figure falls in nitrogen pick-up of the present invention;
Fig. 5 is 316 austenitic stainless steel room temperature impact fracture apperance figure;
Fig. 6 is that nickel 316 austenitic stainless steel room temperature impact fracture apperance figure falls in nitrogen pick-up of the present invention.
Embodiment
Below in conjunction with embodiment, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
The determination of nitrogen content: nitrogen has stable austenite tissue as the alloying element in stainless steel, can improve the effect of corrosion resistance nature and mechanical property by solution strengthening and grain-boundary strengthening.But nitrogen is difficult to be solidly soluted in matrix at ambient pressure, usual recovery rate is about 50%, therefore the present invention takes the mode adding nitro-alloy (high nitrogen ferrochrome, high nitrogen ferromanganese) to improve nitrogen content in molten steel, the nitrogen content of design is 1.0%, due to the effusion of nitrogen in the fast decoupled of nitrogen-containing alloy, solidification of molten steel process in actual production process, the nitrogen content <0.5% finally obtained.
The determination of nickel content: nickel, as strong austenite former, has the effect of stable austenite tissue in austenitic stainless steel.Because nickel resources cost is higher, scarcity of resources, under the prerequisite not damaging steel performance, therefore choose other alloying element reduce production cost to replace nickel element.Research finds that the effect of nitrogen in austenitic stainless steel is equivalent to 18 times of nickel, chooses the inexorable trend having become stainless steel research with nitrogen for nickel.What obtain at warranty test steel organizes still under the prerequisite of single austenite structure, and the nickel content that the present invention designs is 9%.
Production technique:
Fall in nitrogen pick-up in the smelting process of nickel 316 austenitic stainless steel reality, the content of all the other elements should be strict with when nitrogen element, nickel element change.The technological process of production is: dry-feed-vacuumize-melting sources-distributor killing-distributor interpolation nitride-cast.
Solid solution treatment process:
Cool fast after 1100 DEG C of solution treatment 1h, make the compound be solidly soluted in matrix be kept in matrix at normal temperature, reduce the precipitation of carbide or nitride.
Drawing by high temperature technique:
Gleeble-1500D thermal simulation experiment machine carries out high temperature tension test, sample with the heating rate of 20 DEG C/s to 1150 DEG C, insulation 2min to eliminate the uneven thermograde caused of heating, then is down to 1100 DEG C, 1050 DEG C, 1000 DEG C, 950 DEG C respectively with the speed of 10 DEG C/s.With 0.05s
-1strain rate carry out stretching until rupture.
1. prepare burden
The present invention is at 316 austenite stainless steel chemical composition (C:0.04-0.1%; Si :≤1%; Mn :≤2%; P :≤0.045%; S :≤0.03%; Cr:16-18%; Ni:10-14%; Mo:2-3%, all the other are Fe) basis on, utilize high nitrogen ferrochrome, high nitrogen ferromanganese, low carbon ferrochromium, molybdenum-iron, pure nickel, pure iron to carry out nitrogen pick-up and fall nickel fibers and obtain target steel grade, raw materials used chemical composition is as shown in table 1.The recovery rate of each element is as shown in table 2.The chemical composition of embodiment is as shown in table 3.Consider the generation having burning phenomenon in actual smelting process, the actual add-on of smelting 8Kg embodiment is as shown in table 4.
Table 1: material chemical component (%)
Table 2: the recovery rate (%) of each element
Table 3: embodiment chemical composition (%)
Table 4: the actual add-on (g) of the raw material of embodiment
2. steel grade of the present invention at ambient temperature yield strength improve 50.16%, tensile strength improves 47.32%, and impelling strength improves 12.26%, and to fall 316 austenitic stainless steel contrast effects of nickel as shown in table 5 with not carrying out nitrogen pick-up:
Obdurability contrast before and after nickel process falls in table 5 nitrogen pick-up
3. steel grade of the present invention has good thermoplasticity and heat resistance, (draft temperature 950 DEG C ~ 1100 DEG C, strain rate 0.05s under same test conditions
-1), to fall 316 austenitic stainless steel contrast effects of nickel as shown in table 6 with not carrying out nitrogen pick-up:
Thermoplasticity before and after nickel process, heat resistance contrast fall in table 6 nitrogen pick-up
Advantage of the present invention: the method for being fallen nickel in 316 austenitic stainless steels by nitrogen pick-up, is improve its comprehensive mechanical property, and reduces production cost, have broad application prospects.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (2)
1. 316 austenitic stainless steels of nickel fall in nitrogen pick-up, it is characterized in that its chemical composition and weight percent are counted: C:0.04-0.1%; Si :≤1%; Mn :≤2%; P :≤0.045%; S :≤0.03%; Cr:16-18%; Ni:8-11%; Mo:2-3%; N:0-0.36%, all the other are matrix Fe.
2. prepare the method that 316 austenitic stainless steels of nickel fall in nitrogen pick-up as claimed in claim 1 for one kind, the technological process of production is: dry-feed-vacuumize-melting sources-distributor killing-distributor interpolation nitride-cast, it is characterized in that: also comprise solid solution treatment process, processing parameter is: cool fast after 1100 DEG C of solution treatment 1h, and the compound be solidly soluted in matrix is kept in matrix at normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510029394.8A CN104611643A (en) | 2015-01-21 | 2015-01-21 | 316 austenitic stainless steel with nitrogen increased and nickel decreased and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510029394.8A CN104611643A (en) | 2015-01-21 | 2015-01-21 | 316 austenitic stainless steel with nitrogen increased and nickel decreased and preparation method thereof |
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| CN104611643A true CN104611643A (en) | 2015-05-13 |
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| CN201510029394.8A Pending CN104611643A (en) | 2015-01-21 | 2015-01-21 | 316 austenitic stainless steel with nitrogen increased and nickel decreased and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893945A (en) * | 2017-02-08 | 2017-06-27 | 大通互惠集团有限公司 | A kind of manufacture method of low temperature austenitic stainless steel and its casting and casting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090060775A1 (en) * | 2007-08-29 | 2009-03-05 | Advanced International Multitech Co., Ltd. | Cr-Mn-N austenitic stainless steel |
| CN102936702A (en) * | 2012-11-23 | 2013-02-20 | 四川金广技术开发有限公司 | Nickel-saving stainless steel panel and manufacturing method thereof |
| CN103374685A (en) * | 2012-04-23 | 2013-10-30 | 钢铁研究总院 | Stainless steel material and manufacturing method thereof |
-
2015
- 2015-01-21 CN CN201510029394.8A patent/CN104611643A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090060775A1 (en) * | 2007-08-29 | 2009-03-05 | Advanced International Multitech Co., Ltd. | Cr-Mn-N austenitic stainless steel |
| CN103374685A (en) * | 2012-04-23 | 2013-10-30 | 钢铁研究总院 | Stainless steel material and manufacturing method thereof |
| CN102936702A (en) * | 2012-11-23 | 2013-02-20 | 四川金广技术开发有限公司 | Nickel-saving stainless steel panel and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 栾燕 等: "《GB/T20878-2007 不锈钢和耐热钢牌号及化学成分》", 9 March 2007, 中国国家标准化管理委员会 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893945A (en) * | 2017-02-08 | 2017-06-27 | 大通互惠集团有限公司 | A kind of manufacture method of low temperature austenitic stainless steel and its casting and casting |
| CN106893945B (en) * | 2017-02-08 | 2020-02-14 | 大通互惠集团有限公司 | Austenitic stainless steel for low temperature, casting thereof and manufacturing method of casting |
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Application publication date: 20150513 |