CN108676985A - A method of improving high-nickel steel plate surface quality - Google Patents
A method of improving high-nickel steel plate surface quality Download PDFInfo
- Publication number
- CN108676985A CN108676985A CN201810446683.1A CN201810446683A CN108676985A CN 108676985 A CN108676985 A CN 108676985A CN 201810446683 A CN201810446683 A CN 201810446683A CN 108676985 A CN108676985 A CN 108676985A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- steel
- roller
- shove charge
- high temperature
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- 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
- C21D6/001—Heat treatment of ferrous alloys containing 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
- 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
Abstract
The present invention relates to a kind of method improving high-nickel steel plate surface quality, steel billet paint temperature is maintained at 0 DEG C or more；48 hours dry or more shove charge again after steel plate japanning；When shove charge, shove charge speed control is in 0.5m/s or less on roller-way；The steel billet time inside furnace that thickness is 250mm is 8~12min/cm, and the high temperature section time is no more than 1.5h, and the temperature of high temperature section is controlled at 1200 DEG C or more；The steel billet time inside furnace that thickness is 110mm is 8~12min/cm, and the high temperature section time is no more than 1h, fully ensures the validity of the coat of paint；Tapping temperature is controlled at 1220 DEG C or less；Shot blasting velocity is 4~4.2m/s；It is separated with cardboard between every block of steel plate when steel plate stacking, and uses vacuum cup handling.Advantage is：The generation for avoiding oxidation scalelike mark and oxidation hole reduces pellet indentation and impression and scuffing；Improve the surface quality of high-nickel steel plate.
Description
Technical field
The present invention relates to a kind of method improving high-nickel steel plate surface quality more particularly to a kind of improvement 9Ni steel steel plate tables
The method of face quality.
Background technology
Ni Series Pressure Vessel Steels, are always the imperial crown in Vessel Steels, and as the Ni steel of LNG storage tank steel, then
It is the jewel on imperial crown.Ni steel is low-carbon martensite type cryogenic steel, has body-centered cubic structure and apparent Transition of Brittleness temperature
Degree, the advantages such as Ni steel, easy to process and excellent weldability high with its intensity are widely used in LNG storage tank equipment.Due to Ni
Element has extremely strong oxytropism, therefore reaches as Ni contents for 2% or more steel plate, and the problem of oxidation of surface of steel plate is
Influence the greatest problem of plate quality.Simultaneously as to the particular/special requirement of surface of steel plate, surface of steel plate cannot remain any lack
It falls into.
Due to the characteristic of Ni steel plates, Ni plate surface qualities become the greatest problem for influencing plate quality, and the problem is made
At steel plate waste product be always influence Ni steel kind lumber recoverys most important factor.In process of production, the table that Ni steel plates generate
Face mass defect is broadly divided into three aspects, is respectively：Aoxidize scalelike mark and oxidation hole, pellet indentation and impression and scuffing.
Invention content
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a kind of sides improving high-nickel steel plate surface quality
Method reduces Ni systems Surface Defects in Steel Plate, improves Ni systems plate surface quality, reduces the generation of steel plate waste product, saves production cost.
To achieve the above object, the invention is realized by the following technical scheme：
A method of improving high-nickel steel plate surface quality, includes the following steps：
1) when steel blank regrinding, stupefied processing is carried out to property at parts of edges and corners, edges and corners burr is avoided to be pressed into surface of steel plate；
2) steel billet paint temperature is maintained at 0 DEG C or more；
3) 48 hours dry or more shove charge again after steel plate japanning；
4) steel billet lower surface after japanning is dry must the protection of packet cardboard, avoid steel billet lower surface from being in direct contact with roller-way；
5) when shove charge, shove charge speed control is in 0.5m/s or less on roller-way；
6) the steel billet time inside furnace that thickness is 250mm is 8~12min/cm, and the wherein high temperature section time is no more than 1.5h, high
The temperature of temperature section is controlled at 1200 DEG C or more；The steel billet time inside furnace that thickness is 110mm is 8~12min/cm, wherein high temperature section
Time is no more than 1h, and the temperature of high temperature section is controlled at 1180 DEG C or more, fully ensures the validity of the coat of paint；
7) tapping temperature control is at 1220 DEG C or less；
8) shot blasting velocity is 3~5m/s.
Shot-blasting machine spend roller using rubber ring formula spend roller, make spend soft contact is formed between roller and steel plate.
It is separated with cardboard between every block of steel plate when steel plate stacking, and uses vacuum cup handling.
Compared with prior art, the beneficial effects of the invention are as follows：
The method for improving high-nickel steel plate surface quality avoids the generation of oxidation scalelike mark and oxidation hole, reduces pellet pressure
Enter and impression and scuffing；The surface quality of high-nickel steel plate is improved, after rejection rate is reduced to implementation this method by 12.3% before
2.2%.
Specific implementation mode
The present invention is described in detail below, it should be noted that the implementation embodiment party not limited to the following of the present invention
Formula.
A method of improving high-nickel steel plate surface quality, includes the following steps：
1) when steel blank regrinding, stupefied processing is carried out to property at parts of edges and corners, edges and corners burr is avoided to be pressed into surface of steel plate；
2) steel billet paint temperature is maintained at 0 DEG C or more；
3) 48 hours dry or more shove charge again after steel plate japanning；
4) steel billet lower surface after japanning is dry must the protection of packet cardboard, avoid steel billet lower surface from being in direct contact with roller-way；
5) when shove charge, shove charge speed control is in 0.5m/s or less on roller-way；
6) the steel billet time inside furnace that thickness is 250mm is 8~12min/cm, and the wherein high temperature section time is no more than 1.5h, high
The temperature of temperature section is controlled at 1200 DEG C or more；The steel billet time inside furnace that thickness is 110mm is 8~12min/cm, wherein high temperature section
Time is no more than 1h, and the temperature of high temperature section is controlled at 1180 DEG C or more, fully ensures the validity of the coat of paint；
7) tapping temperature control is at 1220 DEG C or less；
8) shot blasting velocity is 3~5m/s；
9) shot-blasting machine flower roller using rubber ring formula spend roller, make spend soft contact is formed between roller and steel plate；
10) it is separated with cardboard between every block of steel plate when steel plate stacking, and uses vacuum cup handling.
Embodiment 1
By taking 9Ni steel plates as an example：
1, blank improves
1) stupefied processing must be carried out when steel blank regrinding to property at parts of edges and corners, edges and corners burr is reduced and is pressed into surface of steel plate.
2) steel billet paint temperature is maintained at 0~30 DEG C, ensures that the coat of paint is bonded with steel billet.
3) ability shove charge in 48 hours or more must be dried after steel plate japanning, prevent the unseasoned complete shove charge of the coat of paint.
4) steel billet following table after japanning is dry must the protection of packet cardboard, avoid steel billet following table from being in direct contact with roller-way, cause
Coat of paint breakage falls off.
2, production technology is improved
1) furnace charging table must take low speed shove charge when shove charge, i.e., be reduced to 0.5m/s by normal shove charge speed 4.0m/s, keep away
It is too fast excessive to the impact of steel billet following table to exempt from roller speed, causes the steel billet following table coat of paint damaged.
2) the steel billet time inside furnace that thickness is 250mm shorten to 4.5h from 5h, and the wherein high temperature section time is no more than 1.5h；It is thick
The steel billet time inside furnace that degree is 110mm shorten to 2.5h from 3h, and the wherein high temperature section time is no more than 1h, fully ensures the coat of paint
Validity.
3) tapping temperature is 1220 DEG C or less.
4) shot blasting velocity is promoted to 4m/s, residual of the reduction pellet in surface of steel plate.
5) shot-blasting machine spends roller to replace original steel to spend roller using rubber ring by the way of, makes colored to form soft connect between roller and steel plate
It touches, pellet is avoided to be pressed into steel plate following table.
3, logistics improves
1) separated with cardboard between every block of steel plate when 9Ni steel plate stackings, pellet can be absorbed by cardboard, and reduce steel plate it
Between caused by cut.
2) the magnetic handling that sticks together is changed to vacuum cup handling, first, avoid magnetic from sticking together is drawn onto 9Ni surface of steel plate by impurity such as slags,
Cause impression；Second is that avoid magnetic from sticking together is drawn onto 9Ni surface of steel plate by pellet, pellet is caused to be pressed into.
3) shorten production procedure, reduce 9Ni steel plate transfer numbers, avoid 9Ni steel plates in multiple transhipment to surface of steel plate
It causes to damage.
4) the special stack position of 9Ni steel plates is set up, apart from least 5 meters of other steel plate stack positions, stack position regularly schedules for 9Ni steel plates stack position
Personnel clean, and keep steel plate face clean, avoid surface of steel plate from generating impression and scratch.
Embodiment 2
1, blank improves
1) stupefied processing must be carried out when steel blank regrinding to property at parts of edges and corners, edges and corners burr is reduced and is pressed into surface of steel plate.
2) steel billet paint temperature is maintained at 0~30 DEG C, ensures that the coat of paint is bonded with steel billet.
3) ability shove charge in 48 hours or more must be dried after steel plate japanning, prevent the unseasoned complete shove charge of the coat of paint.
4) steel billet following table after japanning is dry must the protection of packet cardboard, avoid steel billet following table from being in direct contact with roller-way, cause
Coat of paint breakage falls off.
2, production technology is improved
1) furnace charging table must take low speed shove charge when shove charge, i.e., be reduced to 0.5m/s by normal shove charge speed 4.0m/s, keep away
It is too fast excessive to the impact of steel billet following table to exempt from roller speed, causes the steel billet following table coat of paint damaged.
2) the steel billet time inside furnace that thickness is 250mm shorten to 4h from 5h, and the wherein high temperature section time is no more than 80min, high
Temperature section temperature is controlled at 1200 DEG C or more；Thickness is that the steel billet time inside furnace of 110mm shorten to 2h, wherein high temperature section time from 3h
No more than 50min, the validity of the coat of paint is fully ensured.
3) tapping temperature is 1215 DEG C or less.
4) shot blasting velocity is promoted to 4.5m/s, residual of the reduction pellet in surface of steel plate.
5) shot-blasting machine spends roller to replace original steel to spend roller using rubber ring by the way of, makes colored to form soft connect between roller and steel plate
It touches, pellet is avoided to be pressed into steel plate following table.
3, logistics improves
1) separated with cardboard between every block of steel plate when 9Ni steel plate stackings, pellet can be absorbed by cardboard, and reduce steel plate it
Between caused by cut.
2) the magnetic handling that sticks together is changed to vacuum cup handling, first, avoid magnetic from sticking together is drawn onto 9Ni surface of steel plate by impurity such as slags,
Cause impression；Second is that avoid magnetic from sticking together is drawn onto 9Ni surface of steel plate by pellet, pellet is caused to be pressed into.
3) shorten production procedure, reduce 9Ni steel plate transfer numbers, avoid 9Ni steel plates in multiple transhipment to surface of steel plate
It causes to damage.
4) the special stack position of 9Ni steel plates is set up, apart from least 5 meters of other steel plate stack positions, stack position regularly schedules for 9Ni steel plates stack position
Personnel clean, and keep steel plate face clean, avoid surface of steel plate from generating impression and scratch.
Embodiment 3：
1, blank improves
1) stupefied processing must be carried out when steel blank regrinding to property at parts of edges and corners, edges and corners burr is reduced and is pressed into surface of steel plate.
2) steel billet paint temperature is maintained at 0~40 DEG C, ensures that the coat of paint is bonded with steel billet.
3) ability shove charge in 48 hours or more must be dried after steel plate japanning, prevent the unseasoned complete shove charge of the coat of paint.
4) steel billet following table after japanning is dry must the protection of packet cardboard, avoid steel billet following table from being in direct contact with roller-way, cause
Coat of paint breakage falls off.
2, production technology is improved
1) furnace charging table must take low speed shove charge when shove charge, i.e., be reduced to 0.4m/s by normal shove charge speed 4.0m/s, keep away
It is too fast excessive to the impact of steel billet following table to exempt from roller speed, causes the steel billet following table coat of paint damaged.
2) the steel billet time inside furnace that thickness is 250mm shorten to 4h from 5h, and the wherein high temperature section time is no more than 70min, high
Temperature section temperature is controlled at 1200 DEG C or more；Thickness is that the steel billet time inside furnace of 110mm shorten to 2h, wherein high temperature section time from 3h
No more than 45min, the validity of the coat of paint is fully ensured.
3) tapping temperature is 1210 DEG C or less.
4) shot blasting velocity is promoted to 5m/s, residual of the reduction pellet in surface of steel plate.
5) shot-blasting machine spends roller to replace original steel to spend roller using rubber ring by the way of, makes colored to form soft connect between roller and steel plate
It touches, pellet is avoided to be pressed into steel plate following table.
3, logistics improves
1) separated with cardboard between every block of steel plate when 9Ni steel plate stackings, pellet can be absorbed by cardboard, and reduce steel plate it
Between caused by cut.
2) the magnetic handling that sticks together is changed to vacuum cup handling, first, avoid magnetic from sticking together is drawn onto 9Ni surface of steel plate by impurity such as slags,
Cause impression；Second is that avoid magnetic from sticking together is drawn onto 9Ni surface of steel plate by pellet, pellet is caused to be pressed into.
3) shorten production procedure, reduce 9Ni steel plate transfer numbers, avoid 9Ni steel plates in multiple transhipment to surface of steel plate
It causes to damage.
4) the special stack position of 9Ni steel plates is set up, apart from least 5 meters of other steel plate stack positions, stack position regularly schedules for 9Ni steel plates stack position
Personnel clean, and keep steel plate face clean, avoid surface of steel plate from generating impression and scratch.
Claims (3)
1. a kind of method improving high-nickel steel plate surface quality, which is characterized in that include the following steps：
1) when steel blank regrinding, stupefied processing is carried out to property at parts of edges and corners, edges and corners burr is avoided to be pressed into surface of steel plate；
2) steel billet paint temperature is maintained at 0 DEG C or more；
3) 48 hours dry or more shove charge again after steel plate japanning；
4) steel billet lower surface after japanning is dry must the protection of packet cardboard, avoid steel billet lower surface from being in direct contact with roller-way；
5) when shove charge, shove charge speed control is in 0.5m/s or less on roller-way；
6) the steel billet time inside furnace that thickness is 250mm is 8~12min/cm, and the wherein high temperature section time is no more than 1.5h, high temperature section
Temperature control at 1200 DEG C or more；The steel billet time inside furnace that thickness is 110mm is 8~12min/cm, wherein the high temperature section time
No more than 1h, the temperature of high temperature section is controlled at 1180 DEG C or more, fully ensures the validity of the coat of paint；
7) tapping temperature control is at 1220 DEG C or less；
8) shot blasting velocity is 3~5m/s.
2. a kind of method improving high-nickel steel plate surface quality according to claim 1, which is characterized in that shot-blasting machine spends roller
Using rubber ring formula spend roller, make spend soft contact is formed between roller and steel plate.
3. a kind of method improving high-nickel steel plate surface quality according to claim 1, which is characterized in that when steel plate stacking
It is separated with cardboard between every block of steel plate, and uses vacuum cup handling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446683.1A CN108676985B (en) | 2018-05-11 | 2018-05-11 | Method for improving surface quality of high-nickel steel plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446683.1A CN108676985B (en) | 2018-05-11 | 2018-05-11 | Method for improving surface quality of high-nickel steel plate |
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| CN108676985A true CN108676985A (en) | 2018-10-19 |
| CN108676985B CN108676985B (en) | 2020-02-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113600618A (en) * | 2021-06-30 | 2021-11-05 | 张家港宏昌钢板有限公司 | Method for preventing surface iron oxide from being pressed into 9Ni steel and rolling process |
| CN114438393A (en) * | 2022-01-14 | 2022-05-06 | 南京钢铁股份有限公司 | Method for preventing high-nickel steel from oxidation cracks along crystal |
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|---|---|---|---|---|
| CN113600618A (en) * | 2021-06-30 | 2021-11-05 | 张家港宏昌钢板有限公司 | Method for preventing surface iron oxide from being pressed into 9Ni steel and rolling process |
| CN114438393A (en) * | 2022-01-14 | 2022-05-06 | 南京钢铁股份有限公司 | Method for preventing high-nickel steel from oxidation cracks along crystal |
| CN114438393B (en) * | 2022-01-14 | 2023-03-21 | 南京钢铁股份有限公司 | Method for preventing crystal-oriented oxidation cracks on surface of high-nickel steel plate |
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