CN109022685A - Manufacturing method for controlling residual magnetism of 9Ni steel plate - Google Patents
Manufacturing method for controlling residual magnetism of 9Ni steel plate Download PDFInfo
- Publication number
- CN109022685A CN109022685A CN201710439747.0A CN201710439747A CN109022685A CN 109022685 A CN109022685 A CN 109022685A CN 201710439747 A CN201710439747 A CN 201710439747A CN 109022685 A CN109022685 A CN 109022685A
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- steel plate
- quenching
- tempering
- treatment
- steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 102
- 239000010959 steel Substances 0.000 title claims abstract description 102
- 230000005389 magnetism Effects 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000000171 quenching effect Effects 0.000 claims abstract description 13
- 238000005496 tempering Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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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)
- Heat Treatment Of Articles (AREA)
Abstract
A manufacturing method for controlling remanence of a 9Ni steel plate comprises the following specific steps: 1) in all the working procedures after quenching treatment, the steel plates are all lifted by adopting a vacuum chuck; 2) quenching treatment: according to the non-magnetic characteristic of the steel plate after being heated to the Curie point temperature of 770 ℃, the quenching temperature of the steel plate is 800 +/-30 ℃; 3) tempering treatment: the tempering temperature of the steel plate is 630 +/-20 ℃; 4) stacking steel plates: the steel plates after heat treatment are all stacked on the stacking position which is 50 meters away from the heat treatment furnace. 5) Measurement of remanence: residual magnetism of all steel plates is measured before leaving a factory; 6) and (3) degaussing treatment: and when the remanence of the steel plate is more than 30 gauss, demagnetizing the steel plate. According to the invention, after quenching treatment, each process adopts a vacuum chuck for hoisting, so that the lower magnetic performance of the steel plate is ensured. The magnetic performance of each process is controlled, and the process is free from external pollution. The residual magnetism of key processes is measured, so that the residual magnetism monitoring of the whole steel plate production process is ensured, and qualified steel plates are provided.
Description
Technical field
The present invention relates to the magnetic protection field of alloy hot rolled steel plate in metallurgy industry more particularly to a kind of 9Ni steel plate are surplus
The manufacturing method of magnetic control.
Background technique
In actual production, 9Ni steel easily generates remnant field under external interference, the size and rule of remnant field with
The basic magnetic parameter of material itself is closely related.There are four the main magnetic parameters for influencing material remnant field: magnetic conductivity,
Residual magnetic flux density, saturation induction density, coercivity.
There are certain relationships for steel plate remanent magnetism and 9Ni steel itself magnetic characteristic, but more main reasons is that due to external environment
It influences, the mainly influence of magnetic environment.
Containing the magnetic elements such as a large amount of Fe, Ni in 9Ni steel, when no any strong magnetic field action on the steel plate, 9Ni steel sheet
Body can also will appear additional externally-applied magnetic field in the induction in earth's magnetic field, but the magnetic field is smaller, by our calculating can be with
Know, which is likely to be breached 70Gs or so inside steel plate, is about 1Gs or so in edges of plate.
But on the one hand 9Ni steel plate is easy to induce magnetic field under external magnetic field, after being on the other hand magnetized, magnetic field is easily remained
Become more obstinate remanent magnetism in steel plate, but when magnetic field is without splicing, when whole steel plate is magnetized completely, and ultimately forms
Uniform remnant field is distributed under this extreme case, we are tentatively to the Distribution of Magnetic Field in the case of this kind of 9Ni steel plate
It is simulated, it can be seen that at this moment internal magnetic field is very high for steel plate, and close to 8000Gs, but the magnetic field that edge shows is remote
Less than internal magnetic field, only 80Gs or so.
In practice, whole steel plate is difficult to by Overall magnetization, and at the same time uniform magnetic direction is formed, according to reality
Operating condition, the influence that steel plate is hung due to magnetic can locally be magnetized, while residual fraction remanent magnetism, and the model that we establish can be seen that
At this moment internal magnetic field is between 4000Gs and 8000Gs, and the magnetic field at edge is also only 22Gs, much smaller than internal magnetic field
Distribution.
But this is only the superficial phenomenon of magnetic-field measurement, when we by two steel plate splicings together when, we can see that
The variation in steel plate junction magnetic field is sharply increased as 1200Gs by 22Gs, close to the Distribution of Magnetic Field inside steel plate.From above-mentioned point
It is very big for the magnetic field influence of spliced steel plate commissure that analysis can be seen that the remanent magnetism inside steel plate, but to single steel plate side
The magnetic field influence of edge is smaller, and little illusion is influenced on magnetic field so be easy to causeing and whether being magnetized inside steel plate.
The hot rolled steel plate in addition to 9Ni steel plate of country's smelter production at present, not to steel plate in supply of material standard
Magnetism, which is made, to be distinctly claimed, but the remanent magnetism of 9Ni steel plate is distinctly claimed no more than 50 Gausses.
The 9Ni steel plate of smelter production, magnetic control does not provide explicitly, only requires steel plate far from magnetic material
Matter avoids magnetic contaminant.
Foreign countries are not report explicitly but no more than 50 Gausses to the control of steel plate magnetism to the magnetic requirements of 9Ni steel plate
Road.
Summary of the invention
For without the control method of clear steel plate remanent magnetism, the present invention provides a kind of 9Ni steel plate remanent magnetism in the prior art
The manufacturing method of control makes steel plate have good low magnetic property, provides for engineering equipment manufacturing a kind of safe and reliable
Steel plate materials.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of manufacturing method of 9Ni steel plate remanent magnetism control, the specific method is as follows:
1) process route are as follows: the quenching-tempering-prefabricated processing-transport of service check-surface inspection-steel plate, quenching
Treated all process steps, the method for shipment of steel plate all use vacuum chuck to carry out handling；
2) be quenched: the feature without magnetic after basis steel sheet is heated to 770 DEG C of Curie-point temperature, steel plate quenching temperature are
800 ± 30 DEG C, the magnetism after guaranteeing steel plate quenching is substantially zeroed；
3) tempering: steel plate tempering temperature is 630 ± 20 DEG C, and the steel plate after tempering is during subsequent transport
Handling is carried out using vacuum chuck；
4) stacking of steel plate: steel plate is all deposited on the stack position other than 50 meters of heat-treatment furnace after heat treatment；
5) detection steel plate remanent magnetism meets the requirements sending less than 30 Gausses.
Compared with prior art, the beneficial effects of the present invention are:
1) every procedure carries out handling using vacuum chuck after being quenched, and ensure that steel plate has lower magnetic property.
2) present invention is provided by controlling the magnetic property of every procedure from outside contamination for engineering equipment manufacturing
A kind of safe and reliable steel plate materials.
3) present invention is guaranteed the remanent magnetism monitoring of Plate Production manufacture overall process, is provided by the remanent magnetism of measurement key procedure
Qualified steel plate.
Detailed description of the invention
Fig. 1: for steel plate remanent magnetism position measurement position figure.
In figure: the side 1-, the angle 2-, 3- point.
Specific embodiment
Embodiments of the present invention are further illustrated with reference to the accompanying drawing:
A kind of manufacturing method of 9Ni steel plate remanent magnetism control, the specific method is as follows:
1) process route are as follows: the quenching-tempering-prefabricated processing-transport of service check-surface inspection-steel plate, quenching
Treated all process steps, the method for shipment of steel plate all use vacuum chuck to carry out handling；
2) be quenched: the feature without magnetic after basis steel sheet is heated to 770 DEG C of Curie-point temperature, steel plate quenching temperature are
800 ± 30 DEG C, the magnetism after guaranteeing steel plate quenching is substantially zeroed；
3) tempering: steel plate tempering temperature is 630 ± 20 DEG C, and the steel plate after tempering is during subsequent transport
Handling is carried out using vacuum chuck；
4) stacking of steel plate: steel plate is all deposited on the stack position other than 50 meters of heat-treatment furnace after heat treatment.
5) measurement of residual magnetism: factory front spring all carries out measurement of residual magnetism, and the position of steel plate measurement of residual magnetism is sharp 3, angle 2, side
1, wherein point 3 is position most advanced at upper surface of steel plate totally 4；Angle 2 is the most advanced position of steel plate along surface of steel plate diagonal line side
ToPosition；Side 1 is thickness direction of the most advanced position of steel plate along steel plate length, the position width direction d=800mm
Whole positions；As shown in Figure 1.
The regulation of steel plate measurement of residual magnetism:
The upper table of eligible state steel plate before every measurement of the steel plate as-quenched, annealed strip, prefabricated machining state and factory
4, face " angle 2 ", 8 " side 1 " totally 12 remanent magnetism, it is for future reference to carry out original record.The surplus of steel plate 4 " point 3 " point position is measured simultaneously
Magnetic individually carries out original record, for future reference as inner quality standard.
Steel plate remanent magnetism is detected less than 30 Gausses, meets the requirements sending.If steel plate detection position remanent magnetism is greater than 30 Gauss,
Demagnetization processing then is carried out to steel plate, is issued after meeting the requirements.
Embodiment:
Table 1: steel plate specification and heat treatment process in embodiment 1-3
| Embodiment | Grade of steel | Specification mm | Quenching technical system | Tempering process system |
| 1 | 9Ni(06Ni9DR) | 26.5×3030×11750 | 825-835℃ | 615-620℃ |
| 2 | 9Ni(06Ni9DR) | 22.5×3030×11750 | 815-825℃ | 610-615℃ |
| 3 | 9Ni(06Ni9DR) | 8×2000×7450 | 800-805℃ | 630-635℃ |
Table 2: the steel plate chemical component of embodiment 1-3
Table 3: the practical measurement of residual magnetism of embodiment 1-3 steel plate records unit: Gauss
The above measurement result is respectively less than 30 Gausses.
Claims (1)
1. a kind of manufacturing method of 9Ni steel plate remanent magnetism control, which is characterized in that the specific method is as follows:
1) process route are as follows: the quenching-tempering-prefabricated processing-transport of service check-surface inspection-steel plate, quenching treatment
All process steps afterwards, the method for shipment of steel plate all use vacuum chuck to carry out handling；
2) be quenched: basis steel sheet is heated to feature of the Curie-point temperature or more without magnetic, and steel plate quenching temperature is 800 ± 30
℃；
3) tempering: steel plate tempering temperature is 630 ± 20 DEG C, and the steel plate after tempering uses during subsequent transport
Vacuum chuck carries out handling；
4) stacking of steel plate: steel plate is all deposited on the stack position other than 50 meters of heat-treatment furnace after heat treatment；
5) detection steel plate remanent magnetism meets the requirements sending less than 30 Gausses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439747.0A CN109022685A (en) | 2017-06-12 | 2017-06-12 | Manufacturing method for controlling residual magnetism of 9Ni steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439747.0A CN109022685A (en) | 2017-06-12 | 2017-06-12 | Manufacturing method for controlling residual magnetism of 9Ni steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109022685A true CN109022685A (en) | 2018-12-18 |
Family
ID=64630141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710439747.0A Pending CN109022685A (en) | 2017-06-12 | 2017-06-12 | Manufacturing method for controlling residual magnetism of 9Ni steel plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN109022685A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025791A (en) * | 2021-03-24 | 2021-06-25 | 大冶特殊钢有限公司 | Induction hardening and tempering method with controllable residual magnetism intensity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117692A (en) * | 2006-11-24 | 2008-02-06 | 北京北冶功能材料有限公司 | Non-magnetic high-strength stainless steel material and method for manufacturing the same |
| CN105690910A (en) * | 2016-01-15 | 2016-06-22 | 宝山钢铁股份有限公司 | 9Ni steel and stainless steel composite steel plate for LNG storage tank and movable vessel and manufacturing method of composite steel plate |
-
2017
- 2017-06-12 CN CN201710439747.0A patent/CN109022685A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117692A (en) * | 2006-11-24 | 2008-02-06 | 北京北冶功能材料有限公司 | Non-magnetic high-strength stainless steel material and method for manufacturing the same |
| CN105690910A (en) * | 2016-01-15 | 2016-06-22 | 宝山钢铁股份有限公司 | 9Ni steel and stainless steel composite steel plate for LNG storage tank and movable vessel and manufacturing method of composite steel plate |
Non-Patent Citations (2)
| Title |
|---|
| 陈社鹏 等: "9Ni钢在LNG储罐中的应用分析与探讨", 《化工装备技术》 * |
| 马向峰 等: "LNG储罐用06Ni9钢板的质量控制", 《压力容器》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025791A (en) * | 2021-03-24 | 2021-06-25 | 大冶特殊钢有限公司 | Induction hardening and tempering method with controllable residual magnetism intensity |
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Application publication date: 20181218 |