CN106435145A - Preparation method of stainless steel - Google Patents
Preparation method of stainless steel Download PDFInfo
- Publication number
- CN106435145A CN106435145A CN201610978099.1A CN201610978099A CN106435145A CN 106435145 A CN106435145 A CN 106435145A CN 201610978099 A CN201610978099 A CN 201610978099A CN 106435145 A CN106435145 A CN 106435145A
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- Prior art keywords
- cooled
- water
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- cooling
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Classifications
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A preparation method of stainless steel comprises the following steps of treatment of raw materials, heat treatment of middle tube billets, manufacturing of middle semi-finished tubes, manufacturing of finished straight tubes, pickling and passivating treatment of the finished straight tubes, bright heat treatment of the finished tubes, straightening and inspecting of the finished tubes, and coating spraying, packaging and warehousing. Pure nitrogen protection is adopted for bright heat treatment of the finished tubes; the step of heat treatment of the middle tube billets comprises the sub-steps of tempering heating, rapid cooling and cooling to the room temperature; and cooling methods include water cooling, air cooling and aerial fog cooling. The stainless steel prepared through the preparation method is high in corrosion resistance and plasticity, excellent in low-temperature toughness, and capable of being used for manufacturing doors and windows.
Description
Technical field
The present invention relates to a kind of rustless steel and preparation method thereof, specifically a kind of for the stainless of house metal door window
Steel and preparation method thereof.
Background technology
Metal door and window is typically all made by rustless steel, it is desirable to metal door and window rustless steel need extremely strong antiseptic property and
Unique stainless gloss, heat-insulating property needs to be better than with structure ordinary steel, with metal door and window use increasingly extensive, to not
The technical requirements of rust steel are also improved constantly, and need which to have enough transverse yield strengths and corrosion resistance；And it is cold at some
Area, stainless low-temperature flexibility is not high yet, can often cause just to rupture at short notice yet.Therefore how metallic door is effectively improved
Window stainless transverse yield strength, corrosion resistance and low-temperature flexibility are that those skilled in the art have always a demand for solving
Technical problem.
Content of the invention
The technical problem to be solved is to overcome the shortcoming of prior art, provides a kind of its preparation side of rustless steel
Method, the door and window for being made using the rustless steel has a strong corrosion resistance, high-ductility, and with excellent low temperature toughness.
The present invention solves the technical scheme of above technical problem：
A kind of stainless preparation method, comprises the steps of：Feedstock treating-centre pipe heat treatment-middle semi-finished product-becomes
Product straight tube-finished-product straight pipe pickling and Passivation Treatment-brightness heat treatment production tube-production tube aligning and inspection-sprayed coating are packaged into
Storehouse, the brightness heat treatment of the production tube adopts purity nitrogen gas shielded, and the intervalve heat treatment includes tempering heating-rapidly cold
But-and room temperature is cooled to, the mode of the cooling is using water-cooled, the cooling of air-cooled, aerosol.
The step of middle pipe heat treatment, is specially：The tempering of middle pipe is heated to 1200 DEG C, is passed through after coming out of the stove
Compressed air is cooled fast to 1040 DEG C, through the first refrigerating work procedure, rustless steel fast speed is cooled to 400 DEG C online, then by the
Two cooling techniques are cooled to room temperature.
First refrigerating work procedure in the step of middle pipe heat treatment：First using water-cooled, stainless steel water is cooled to
910 DEG C, then using air-cooled, slab is cooled to 620 DEG C, then using aerosol cooling, stainless steel water is cooled to 400 DEG C；Described second
Refrigerating work procedure：First adopt air-cooled so that stainless steel water is cooled to 290 DEG C, rustless steel is cooled to by room temperature using water-cooled；
The cooling by water speed of first refrigerating work procedure is 10-15 DEG C/s, and air-cooled cooldown rate is 8-12 DEG C/s, aerosol
The cooldown rate of cooling is 4-6 DEG C/s；The air-cooled cooldown rate 8-10 DEG C/s of second refrigerating work procedure；The cooling speed of water-cooled
Rate is 10-12 DEG C/s.
The brightness heat treatment production tube, heat treatment is concretely comprised the following steps：Production tube is heated to 1000 DEG C, is passed through after coming out of the stove
Compressed air is cooled fast to 800 DEG C, through the 3rd refrigerating work procedure, rustless steel fast speed is cooled to 500 DEG C online, then by the
Four cooling techniques are cooled to room temperature；
The brightness heat treatment production tube, the 3rd refrigerating work procedure of slipping up：Using compressed air or vaporific quenching liquid, rustless steel is cold
To 500 DEG C；4th refrigerating work procedure：Combined with air cooling using water-cooled, first using water-cooled, stainless steel water is cooled to 490 DEG C, so
After be air cooled to 320 DEG C, then stainless steel water is cooled to by room temperature using water-cooled.
The cooldown rate of the compressed air or vaporific quenching liquid is 13-15 DEG C/s, and the cooldown rate of water-cooled is 12-15
℃/s .
The invention has the beneficial effects as follows：The performance of thickness direction is improve by rustless steel prepared by the present invention and low temperature is tough
Property and corrosion resistance is improve, can be used for the making of housing window.
Specific embodiment
Below in conjunction with specific embodiment, technical scheme is described in further detail, but the protection model of the present invention
Enclose and be not limited thereto.
Embodiment 1
A kind of stainless preparation method of the present embodiment, comprises the steps of：
(i) pipe needed for being cold-rolled to component and the satisfactory mother tube of content by cold bundle equipment after pickling, solution treatment is outer
Footpath and the middle pipe of wall thickness, it is ± 0.12mm that pipe detector for outer diameter error is ± 0.1mm, wall thickness deflection；
(ii) heat treatment is carried out to middle pipe, heat treatment is specially：Heat treatment is specially：The tempering of middle pipe is heated to
1200 DEG C, after coming out of the stove, 1040 DEG C are cooled fast to by compressed air, through the first refrigerating work procedure, rustless steel is quick online
Degree is cooled to 400 DEG C, then is cooled to room temperature by the second cooling technique；
First refrigerating work procedure：Combined using water-cooled, air-cooled cooling with aerosol, first adopt water-cooled to incite somebody to action with the cooldown rate of 12 DEG C/s
Stainless steel water is cooled to 910 DEG C, then adopts the air-cooled cooldown rate with 9 DEG C/s that slab is cooled to 620 DEG C, then cold using aerosol
But with the cooldown rate of 4 DEG C/s, stainless steel water is cooled to 400 DEG C；Second refrigerating work procedure：Combined with water-cooled using air-cooled, first adopted
With the air-cooled cooldown rate with 11 DEG C/s, stainless steel water is cooled to 290 DEG C, adopts the water-cooled will not with the cooldown rate of 12 DEG C/s
Rust steel is cooled to room temperature；
(iii) by further for middle base after heat treatment cold-drawn to required pipe external diameter and the middle semi-finished product of wall thickness, pipe detector for outer diameter error
± 25mm, wall thickness deflection ± 15mm；
(iv) middle semi-finished product is directly pricked the finished-product straight pipe to required pipe external diameter and wall thickness by cold-rolling equipment essence, pipe external diameter is by mistake
Difference is ± 0.08mm, and wall thickness deflection is ± 0.01mm；
(v) pickling and Passivation Treatment are carried out to finished-product straight pipe, and inside pipe wall successively uses the cotton for soaking acetone and dry cotton, by means of
Giant pressure pushes lower repeatedly wiping and is cleaned processing, and pipe outer wall is directly successively wiped with the cotton and dry cotton of acetone
It is cleaned processing；
(vi) atmosphere brightness heat treatment, atmosphere brightness heat treatment are carried out using the production tube that pure nitrogen gas protective atmosphere is crossed to cleaning treatment
Specially：Production tube is heated to 1000 DEG C, after coming out of the stove, 800 DEG C is cooled fast to by compressed air, online through the 3rd cooling
Rustless steel fast speed is cooled to 500 DEG C by operation, then is cooled to room temperature by the 4th cooling technique；
3rd refrigerating work procedure：Compressed air or vaporific quenching liquid is adopted to be cooled to rustless steel with the cooldown rate of 14 DEG C/s
540℃ ；4th refrigerating work procedure：Combined with air cooling using water-cooled, first adopt the water-cooled will not with the cooldown rate of 13 DEG C/s
Rust molten steel is cooled to 490 DEG C, is then air cooled to 320 DEG C, then adopts water-cooled, with the cooldown rate of 9 DEG C/s, stainless steel water is cooled to room
Temperature；
(vii) whole production tube is aligned, to the production tube Non-Destructive Testing after straightening processing, after the assay was approved production tube is entered
Row is anti-to be coated with corrosion-resistant coating, then packaging and storage.
In addition to the implementation, the present invention can also have other embodiment.All employing equivalents or equivalent transformation shape
The technical scheme for becoming, all falls within the protection domain of application claims.
Claims (7)
1. a kind of stainless preparation method, comprises the steps of：Feedstock treating-centre pipe heat treatment-middle semi-finished product-
Finished-product straight pipe-finished-product straight pipe pickling and Passivation Treatment-brightness heat treatment production tube-production tube aligning and inspection-sprayed coating packaging
Warehouse-in, it is characterised in that the brightness heat treatment of the production tube adopts purity nitrogen gas shielded, the intervalve heat treatment includes tempering
Heat-rapidly cool down-be cooled to room temperature, the mode of the cooling is using water-cooled, the cooling of air-cooled, aerosol.
2. a kind of stainless preparation method as claimed in claim 1, it is characterised in that：The step of the middle pipe heat treatment
Suddenly it is specially：The tempering of middle pipe is heated to 1200 DEG C, 1040 DEG C is cooled fast to by compressed air after coming out of the stove, online warp
Rustless steel fast speed is cooled to 400 DEG C by the first refrigerating work procedure, then is cooled to room temperature by the second cooling technique.
3. a kind of stainless preparation method as claimed in claim 2, it is characterised in that the step of the middle pipe heat treatment
First refrigerating work procedure in rapid：First using water-cooled, stainless steel water is cooled to 910 DEG C, then using air-cooled, slab is cooled to
620 DEG C, then using aerosol cooling, stainless steel water is cooled to 400 DEG C；Second refrigerating work procedure：First adopt air-cooled with will be stainless
Molten steel is cooled to 290 DEG C, using water-cooled, rustless steel is cooled to room temperature.
4. a kind of stainless preparation method as claimed in claim 3, it is characterised in that the water-cooled of first refrigerating work procedure
Cooldown rate is 10-15 DEG C/s, and air-cooled cooldown rate is 8-12 DEG C/s, and the cooldown rate of aerosol cooling is 4-6 DEG C/s；Institute
State air-cooled cooldown rate 8-10 DEG C of the second refrigerating work procedure/s；The cooldown rate of water-cooled is 10-12 DEG C/s.
5. a kind of stainless preparation method as claimed in claim 1, it is characterised in that the brightness heat treatment production tube,
Heat treatment is concretely comprised the following steps：Production tube is heated to 1000 DEG C, 800 DEG C is cooled fast to by compressed air after coming out of the stove, online
Through the 3rd refrigerating work procedure, rustless steel fast speed is cooled to 500 DEG C, then room temperature is cooled to by the 4th cooling technique.
6. a kind of stainless preparation method as claimed in claim 1, it is characterised in that the brightness heat treatment production tube,
Slip up the 3rd refrigerating work procedure：Using compressed air or vaporific quenching liquid, rustless steel is cooled to 500 DEG C；4th refrigerating work procedure：
Combined with air cooling using water-cooled, first using water-cooled, stainless steel water is cooled to 490 DEG C, 320 DEG C are then air cooled to, then will using water-cooled
Stainless steel water is cooled to room temperature.
7. a kind of stainless preparation method as claimed in claim 1, it is characterised in that the compressed air or vaporific quench
The cooldown rate of fiery liquid is 13-15 DEG C/s, and the cooldown rate of water-cooled is 12-15 DEG C/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610978099.1A CN106435145A (en) | 2016-11-08 | 2016-11-08 | Preparation method of stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610978099.1A CN106435145A (en) | 2016-11-08 | 2016-11-08 | Preparation method of stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106435145A true CN106435145A (en) | 2017-02-22 |
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ID=58207542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610978099.1A Pending CN106435145A (en) | 2016-11-08 | 2016-11-08 | Preparation method of stainless steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107164615A (en) * | 2017-06-08 | 2017-09-15 | 合肥帧讯低温科技有限公司 | Preparation method of stainless steel |
| CN110977354A (en) * | 2019-12-20 | 2020-04-10 | 房县诚信汽配有限责任公司 | Production process of fuel tank hoop |
| CN112267068A (en) * | 2020-09-30 | 2021-01-26 | 联峰钢铁（张家港）有限公司 | High-temperature corrosion-resistant steel for pipelines and production process thereof |
-
2016
- 2016-11-08 CN CN201610978099.1A patent/CN106435145A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107164615A (en) * | 2017-06-08 | 2017-09-15 | 合肥帧讯低温科技有限公司 | Preparation method of stainless steel |
| CN110977354A (en) * | 2019-12-20 | 2020-04-10 | 房县诚信汽配有限责任公司 | Production process of fuel tank hoop |
| CN112267068A (en) * | 2020-09-30 | 2021-01-26 | 联峰钢铁（张家港）有限公司 | High-temperature corrosion-resistant steel for pipelines and production process thereof |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |
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| WD01 | Invention patent application deemed withdrawn after publication |