CN108866425A - Use the metallurgy and foundry technique of Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel - Google Patents
Use the metallurgy and foundry technique of Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel Download PDFInfo
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- CN108866425A CN108866425A CN201810815911.8A CN201810815911A CN108866425A CN 108866425 A CN108866425 A CN 108866425A CN 201810815911 A CN201810815911 A CN 201810815911A CN 108866425 A CN108866425 A CN 108866425A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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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
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/18—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
Abstract
The present invention relates to a kind of metallurgy and foundry techniques using Ar-O_2 furnace smelting high-nitrogen nonmagnetic steel stainless steel, 510~530kg/t of material head, 300~320kg/t of high carbon ferro-chrome, 8~40kg/t of molybdenum-iron, 14~30kg/t of electrolytic nickel are returned using intermediate frequency furnace fusing first, 5~10kg/t of carburant, temperature are more than or equal in 1560 DEG C of sampling tappings to Ar-O_2 furnace；Then Ar-O_2 furnace adds alloy according to sampling result, decarburization to 0.01% hereinafter, plus 10~25kg/t special type reduction by ferrosilicon, add 200~240kg/t of electrolytic manganese, add 5~10kg/t of aluminium to heat up, secondary in two batches plus 20~30kg/t nitrided ferromanganese alloy；In tapping to ladle；Turn casting station, using top teeming process moulding by casting, Mo Neijia covering slag 0.5~1kg/t is environmentally friendly and at low cost, improves molten steel Utilization rate 8%, Mo Neijia covering slag guarantees the surface quality of electrode billet and utilizes demoulding.
Description
Technical field
The invention belongs to steelmaking technical fields, are related to a kind of metallurgy and foundry using Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel
Technique.
Background technique
High nitrogen magnetism-free stainless steel has very high intensity, and has good corrosion resistance, and tissue signature is austenite, quilt
It is widely used in the fields such as oil exploitation, ocean platform, military project.The research and development of domestic high-carbon magnetism-free stainless steel than later,
The trade mark produced in the market is mostly the mature trade mark of foreign imitation, and part steel grade also in experimental stage, is substantially more expensive, smelting
Foundry engieering is refined to fall behind relatively.
Summary of the invention
A kind of inexpensive, industrialization production height is provided it is an object of the invention to overcome the deficiencies in the prior art
The metallurgy and foundry technique using Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel of nitrogen magnetism-free stainless steel.
To achieve the goals above, the present invention adopts the following technical scheme that：It is a kind of using Ar-O_2 furnace smelting high-nitrogen without magnetic not
The metallurgy and foundry technique of rust steel, using following steps：
Step 1）, intermediate frequency furnace fusing return 510~530kg/t of material head, 300~320kg/t of high carbon ferro-chrome, 8~40kg/t of molybdenum-iron,
14~30kg/t of electrolytic nickel, 5~10kg/t of carburant, temperature are more than or equal in 1560 DEG C of sampling tappings to Ar-O_2 furnace, tapping temperature
Degree control is between 1600~1650 DEG C；
Step 2）, Ar-O_2 furnace alloy added according to sampling result, CaO is added according to weight percent 8~12%, according to weight hundred
Divide than oxygen decarburization to 0.01% and restored hereinafter, being calculated according to Cr scaling loss situation and 10~25kg/t special type ferrosilicon being added, simultaneously
The electrolytic manganese and 5~10kg/t aluminium of 200~240kg/t is added, is warming up to 1650~1750 DEG C, bottom blowing nitrogen restores 10~20 points
Clock, skims 80% or more after sampling, 1560~1580 DEG C of addition 20~30kg/t nitrided ferromanganese alloys of temperature, batch adds in two times
Enter, add 50% for the first time according to weight percent, stir 1 minute, remainder is added for the second time and stirs 2 minutes, nitrogen flow control
In 350-400m3/h, stirs molten steel temperature and control 1460~1480 DEG C of tappings；
Step 3）, tapping in ladle, molten steel temperature bull ladle between 1420~1450 DEG C is poured in packet after weak stirring；
Step 4）, turn casting station, using top teeming process moulding by casting, Mo Neijia 0.5~1kg/t of covering slag, casting uses semi-fluid
It opens and pours the mode of full stream casting and be poured, when 100~200kg of residue starts to subtract stream feeding, and the feeding time is no less than 2 points of kinds, is poured
After with plus 1.0~2.0kg/t of carbonization rice husk, blank demoulding after it is air-cooled or hot sending lower turn of other stations.
Technique is as follows according to the specific Composition Control of weight percent according to IF~AOD~IC process route：[C]≤
0.03%, [Si]≤1.0%, [Mn]≤19~23%, [P]≤0.030%, [S]≤0.010%, [Ni]：1.40~3.00%, [Cr]：
18~24%, [N]：0.60~1.0%, [Mo]：0.50~2.50%.
In step 1）In, institute is necessary for no greasy dirt, non-corroding using material head is returned, and guarantees P≤0.020%, and amount containing Cr is big
0.025% is relaxed to more than when 10%, ingredient is the contained alloy amount according to specifically used material head, suitably subtracts the alloy of respective counts
Amount.
The good effect that technical solution of the present invention generates is as follows：（1）Following for alloy material may be implemented using material head is returned
Ring utilizes, that is, meeting environmental requirement again can be with save the cost；（2）It ensure that steel using first nitrogen, rear nitrided ferromanganese nitrogen pick-up
Nitrogen content also reduces production cost；（3）Top teeming process, which does not use runner brick, injecting pipe brick etc., not can be recycled resistance to material, reduce production
The effective rate of utilization of about 35 yuan/t of cost, molten steel improve 8% or so；（4）Cr, Mo, Mn content are improved, reducing Ni content can mention
The content of high N.
Specific embodiment
Embodiment 1：The present invention uses IF~AOD~IC process route, and technique is according to IF~AOD~IC technique road
Line, it is as follows according to the specific Composition Control of weight percent：[C]≤0.03%, [Si]≤1.0%, [Mn]≤19~23%, [P]≤
0.030%, [S]≤0.010%, [Ni]：1.40~3.00%, [Cr]：18~24%, [N]：0.60~1.0%, [Mo]：0.50~
2.50%。
The step of smelting process, is as follows：
Step 1）, intermediate frequency furnace fusing return 510~530kg/t of material head, 300~320kg/t of high carbon ferro-chrome, 8~40kg/t of molybdenum-iron,
14~30kg/t of electrolytic nickel, 5~10kg/t of carburant, temperature are more than or equal in 1560 DEG C of sampling tappings to Ar-O_2 furnace, tapping temperature
Degree control is between 1600~1650 DEG C；Used material head must guarantee P≤0.020% without greasy dirt, non-corroding（Amount containing Cr is big
10% or more can be relaxed to 0.025%）, ingredient is the contained alloy amount according to specifically used material head, suitably subtracts respective counts
Alloy amount；
Step 2）, Ar-O_2 furnace alloy added according to sampling result, CaO is added according to weight percent 8~12%, according to weight hundred
Divide than oxygen decarburization to 0.01% and restored hereinafter, being calculated according to Cr scaling loss situation and 10~25kg/t special type ferrosilicon being added, simultaneously
The electrolytic manganese and 5~10kg/t aluminium of 200~240kg/t is added, is warming up to 1650~1750 DEG C, bottom blowing nitrogen restores 10~20 points
Clock, skims 80% or more after sampling according to weight percent, temperature control is between 1560~1580 DEG C and 20~30kg/t is added
Nitrided ferromanganese alloy, batch addition in two times is stirred 1 minute according to weight percent first time plus 50%, remaining to add for the second time
Enter and stir 2 minutes, nitrogen flow control is stirred molten steel temperature control and gone out between 1460~1480 DEG C in 350-400m3/h
Steel；
Step 3）, tapping in ladle, molten steel temperature bull ladle between 1420~1450 DEG C is poured in packet after weak stirring；
Step 4）, turn casting station, using top teeming process moulding by casting, Mo Neijia 0.5~1kg/t of covering slag, casting uses semi-fluid
It opens and pours the mode of full stream casting and be poured, when 100~200kg of residue starts to subtract stream feeding, and the feeding time is no less than 2 points of kinds, is poured
After with plus 1.0~2.0kg/t of carbonization rice husk, blank demoulding after it is air-cooled or hot sending lower turn of other stations.
Two groups of smeltings, the chemical composition content of two groups of products smelted have been carried out according to the smelting process of the present embodiment
And in the refining duration of heat following two tables：
1 chemical component m% of table
| Element | Target component | 1 group of the present embodiment | 2 groups of the present embodiment |
| C | ≤0.03 | 0.01 | 0.012 |
| Si | ≤1.00 | 0.25 | 0.35 |
| Mn | 18.00~24.00 | 21.50 | 21.80 |
| P | ≤0.030 | 0.020 | 0.018 |
| S | ≤0.010 | 0.005 | 0.006 |
| Cr | 18.00~24.00 | 18.50 | 19.40 |
| Ni | 1.40~3.00 | 2.30 | 1.60 |
| Mo | 0.50~2.50 | 0.55 | 0.80 |
| N | 0.60~1.00 | 0.65 | 0.71 |
This smelting process is only applicable to the smelting of high-nitrogen austenitic stainless steel electrode billet.
Claims (3)
1. a kind of metallurgy and foundry technique using Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel, it is characterised in that：Using following steps：
Step 1）, intermediate frequency furnace fusing return 510~530kg/t of material head, 300~320kg/t of high carbon ferro-chrome, 8~40kg/t of molybdenum-iron,
14~30kg/t of electrolytic nickel, 5~10kg/t of carburant, temperature are more than or equal in 1560 DEG C of sampling tappings to Ar-O_2 furnace, tapping temperature
Degree control is between 1600~1650 DEG C；
Step 2）, Ar-O_2 furnace alloy added according to sampling result, CaO is added according to weight percent 8~12%, according to weight hundred
Divide than oxygen decarburization to 0.01% and restored hereinafter, being calculated according to Cr scaling loss situation and 10~25kg/t special type ferrosilicon being added, simultaneously
The electrolytic manganese and 5~10kg/t aluminium of 200~240kg/t is added, is warming up to 1650~1750 DEG C, bottom blowing nitrogen restores 10~20 points
Clock, skims 80% or more after sampling according to weight percent, temperature control is between 1560~1580 DEG C and 20~30kg/t is added
Nitrided ferromanganese alloy, batch addition in two times is stirred 1 minute according to weight percent first time plus 50%, remaining to add for the second time
Enter and stir 2 minutes, nitrogen flow control is stirred molten steel temperature control and gone out between 1460~1480 DEG C in 350-400m3/h
Steel；
Step 3）, tapping in ladle, molten steel temperature bull ladle between 1420~1450 DEG C is poured in packet after weak stirring；
Step 4）, turn casting station, using top teeming process moulding by casting, Mo Neijia 0.5~1kg/t of covering slag, casting uses semi-fluid
It opens and pours the mode of full stream casting and be poured, when 100~200kg of residue starts to subtract stream feeding, and the feeding time is no less than 2 points of kinds, is poured
After with plus 1.0~2.0kg/t of carbonization rice husk, blank demoulding after it is air-cooled or hot sending lower turn of other stations.
2. a kind of metallurgy and foundry method using Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel according to claim 1, special
Sign is：Technique is as follows according to the specific Composition Control of weight percent according to IF~AOD~IC process route：[C]≤
0.03%, [Si]≤1.0%, [Mn]≤19~23%, [P]≤0.030%, [S]≤0.010%, [Ni]：1.40~3.00%, [Cr]：
18~24%, [N]：0.60~1.0%, [Mo]：0.50~2.50%.
3. a kind of metallurgy and foundry method using Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel according to claim 1, special
Sign is：In step 1）In, institute is necessary for no greasy dirt, non-corroding using material head is returned, and guarantees P≤0.020%, amount containing Cr big 10%
When more than be relaxed to 0.025%, ingredient is the contained alloy amount according to specifically used material head, suitably subtracts the alloy amount of respective counts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810815911.8A CN108866425A (en) | 2018-07-24 | 2018-07-24 | Use the metallurgy and foundry technique of Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel |
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| CN201810815911.8A CN108866425A (en) | 2018-07-24 | 2018-07-24 | Use the metallurgy and foundry technique of Ar-O_2 furnace smelting high-nitrogen magnetism-free stainless steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565028A (en) * | 2019-10-28 | 2019-12-13 | 河南中原特钢装备制造有限公司 | Smelting method of sulfur-containing martensitic precipitation hardening stainless steel |
| CN111500942A (en) * | 2020-05-11 | 2020-08-07 | 湖南恒基粉末科技有限责任公司 | High-nitrogen-content non-magnetic stainless steel powder and preparation method thereof |
| CN111763802A (en) * | 2020-07-06 | 2020-10-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for smelting 20Mn23AlV non-magnetic steel by AOD converter |
| CN115354212A (en) * | 2022-08-19 | 2022-11-18 | 河南中原特钢装备制造有限公司 | Smelting method for controlling large-size inclusion in Cr-Mn-Ni high-nitrogen austenitic stainless steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534424A (en) * | 2012-01-05 | 2012-07-04 | 山西太钢不锈钢股份有限公司 | Stainless steel, stainless steel wire for bridge pull sling as well as preparation methods and application thereof |
| CN108004487A (en) * | 2016-10-28 | 2018-05-08 | 宝钢特钢有限公司 | A kind of high nitrogen is without magnetic austenitic stainless steel and its manufacture method |
-
2018
- 2018-07-24 CN CN201810815911.8A patent/CN108866425A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534424A (en) * | 2012-01-05 | 2012-07-04 | 山西太钢不锈钢股份有限公司 | Stainless steel, stainless steel wire for bridge pull sling as well as preparation methods and application thereof |
| CN108004487A (en) * | 2016-10-28 | 2018-05-08 | 宝钢特钢有限公司 | A kind of high nitrogen is without magnetic austenitic stainless steel and its manufacture method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565028A (en) * | 2019-10-28 | 2019-12-13 | 河南中原特钢装备制造有限公司 | Smelting method of sulfur-containing martensitic precipitation hardening stainless steel |
| CN111500942A (en) * | 2020-05-11 | 2020-08-07 | 湖南恒基粉末科技有限责任公司 | High-nitrogen-content non-magnetic stainless steel powder and preparation method thereof |
| CN111500942B (en) * | 2020-05-11 | 2021-08-10 | 湖南恒基粉末科技有限责任公司 | High-nitrogen-content non-magnetic stainless steel powder and preparation method thereof |
| CN111763802A (en) * | 2020-07-06 | 2020-10-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for smelting 20Mn23AlV non-magnetic steel by AOD converter |
| CN111763802B (en) * | 2020-07-06 | 2021-09-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for smelting 20Mn23AlV non-magnetic steel by AOD converter |
| CN115354212A (en) * | 2022-08-19 | 2022-11-18 | 河南中原特钢装备制造有限公司 | Smelting method for controlling large-size inclusion in Cr-Mn-Ni high-nitrogen austenitic stainless steel |
| CN115354212B (en) * | 2022-08-19 | 2023-09-01 | 河南中原特钢装备制造有限公司 | Smelting method for controlling large-size inclusion in Cr-Mn-Ni high-nitrogen austenitic stainless steel |
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