CN103333996A - Quenching process of ultra-high strength marine steel E690 super-thick steel plate - Google Patents
Quenching process of ultra-high strength marine steel E690 super-thick steel plate Download PDFInfo
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- CN103333996A CN103333996A CN 201310291750 CN201310291750A CN103333996A CN 103333996 A CN103333996 A CN 103333996A CN 201310291750 CN201310291750 CN 201310291750 CN 201310291750 A CN201310291750 A CN 201310291750A CN 103333996 A CN103333996 A CN 103333996A
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- 238000010791 quenching Methods 0.000 title claims abstract description 37
- 230000000171 quenching effect Effects 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to the field of hot-rolled strip processes, in particular to a quenching process of an ultra-high strength marine steel E690 extra-thick steel plate, which is characterized by comprising the steps of controlling the water amount of each group of nozzles and the speed of a roller way, wherein the rolling reduction of an upper roller system is 0.2-0.5 mm, the speed of the roller way is 1.2-1.5 m/min, the temperature before quenching is 910-930 ℃, the cooling rate is 9-15 ℃/s, the temperature after quenching is 10-30 ℃, and the specific parameters of the water amount of each group of nozzles are controlled as shown in the table. Compared with the prior art, the invention has the beneficial effects that: after the scheme of the invention is implemented, the good shape of the E690 super-thick steel plate after quenching can be ensured, the maximum unevenness of the steel plate is less than or equal to 7mm/m, the final qualified rate of the shape reaches more than 95 percent, and the steel clamping accident is completely avoided.
Description
Technical field
The present invention relates to the hot rolled strip technology field, relate in particular to a kind of quenching technology of superstrength maritime works's steel E690 super-thick steel plate.
Background technology
The E690 steel plate is superstrength oceanographic engineering steel plate, belongs to high strength, highly difficult, high value added product, is widely used in priority projects such as oil drilling platform.E690 superstrength maritime works steel adopts TMCP+ off-line hardening and tempering process scheme.After thickness is rolling by TMCP greater than the E690 of 80mm, obtain very high intensity.Because its special chemical ingredients and performance requriements use common special heavy plate quenching technology, very easily produce plate shape wooden dipper song, even the steel-fastening accident takes place.
At present for the E690 super-thick steel plate of thickness greater than 80mm, there is not thermal treatment process targetedly both at home and abroad, adopting common super-thick steel plate quenching technology mostly, generally is to adopt the quenching press that has 20 groups of nozzles, realizes by the water yield and the quenching velocity of controlling each section nozzle, for the plate shape wooden dipper Qu Wenti that produces, the maximum roughness 16mm/m of steel plate, the later stage need be adopted to flatten and be saved, and has not only increased production cost, and having prolonged the production cycle, efficiency ratio is lower.
Summary of the invention
The object of the present invention is to provide a kind of quenching technology of superstrength maritime works's steel E690 super-thick steel plate, be applicable to the plate shape control of the E690 superstrength maritime works steel that 80mm thickness is above, the steel-plate shape qualification rate is reached more than 95%.
For achieving the above object, technical scheme of the present invention is:
A kind of quenching technology of superstrength maritime works's steel E690 super-thick steel plate, comprise the water yield of respectively organizing nozzle and quenching velocity on the control 20 mouth quenching press, its top roll is that draught is 0.2 ~ 0.5mm, roller table speed is 1.2 ~ 1.5m/min, temperature is 910 ~ 930 ℃ before quenching, 9 ~ 15 ℃/s of rate of cooling, the back temperature of quenching is 10 ~ 30 ℃, it is respectively organized the concrete parameter of nozzle and controls as following table:
The described nozzle of respectively organizing is narrow slit type nozzle, and wherein the 7th group to the 12nd group is high pressure section, and hydraulic pressure is 4 ~ 6Mpa; The 13rd group to the 20th group is low-pressure stage, and hydraulic pressure is 0.3 ~ 0.5Mpa.
Each section nozzle water yield in the table, quenching velocity parameter role are as follows:
1) by adjusting 1 ~ 6 group of water yield of gap nozzle, it is even to control horizontal steel plate inhomogeneous cooling, defectives such as arch, central concave in the middle of minimizing produces;
2) by adjusting nozzle high pressure section (7 ~ 12 groups) water yield, can reduce producing under two defectives such as button, two upwarp;
3) by adjusting the water yield of gap nozzle low-pressure stage (13 ~ 20 groups), reduce defectives such as vertical steel plate inhomogeneous cooling is even;
4) by adjusting quenching velocity, can reduce defectives such as producing steel plate limit portion wave.
Compared with prior art, the invention has the beneficial effects as follows: after implementing the present invention program, the back E690 super-thick steel plate plate shape that can guarantee to quench is good, the maximum roughness≤7mm/m of steel plate, and soleplate shape qualification rate reaches more than 95%, has stopped the generation of steel-fastening accident fully.
Embodiment
The invention will be further described below in conjunction with specific embodiment:
Embodiment 1
The thick E690 of 80mm that with the lot number is B425801800 is example, adopts the quenching press that has 20 groups of nozzles, and each organizes the nozzle water yield and processing parameter such as following table:
The described nozzle of respectively organizing is narrow slit type nozzle, and wherein the 7th group to the 12nd group is high pressure section, and hydraulic pressure is 4Mpa; The 13rd group to the 20th group is low-pressure stage, and hydraulic pressure is 0.3Mpa.
Temperature is 930 ℃ before quenching, 9 ℃/s of rate of cooling, and the back temperature of quenching is 15 ℃.
After above technology quenching, the steel plate template is good, the maximum roughness 4mm/m of steel plate.Complete conformance with standard.
Embodiment 2
The thick E690 of 90mm that with the lot number is B425801900 is example, adopts the quenching press that has 20 groups of nozzles, and each organizes the nozzle water yield and processing parameter such as following table:
The described nozzle of respectively organizing is narrow slit type nozzle, and wherein the 7th group to the 12nd group is high pressure section, and hydraulic pressure is 5Mpa; The 13rd group to the 20th group is low-pressure stage, and hydraulic pressure is 0.4Mpa.
Temperature is 910 ℃ before quenching, 12 ℃/s of rate of cooling, and the back temperature of quenching is 10 ℃.
After above technology quenching, the steel plate template is good, the maximum roughness 4mm/m of steel plate.Complete conformance with standard.
Embodiment 3
The thick E690 of 100mm that with the lot number is B425802000 is example, adopts the quenching press that has 20 groups of nozzles, and each organizes the nozzle water yield and processing parameter such as following table:
The described nozzle of respectively organizing is narrow slit type nozzle, and wherein the 7th group to the 12nd group is high pressure section, and hydraulic pressure is 6Mpa; The 13rd group to the 20th group is low-pressure stage, and hydraulic pressure is 0.5Mpa.
Temperature is 920 ℃ before quenching, 14 ℃/s of rate of cooling, and the back temperature of quenching is 30 ℃.
After above technology quenching, the steel plate template is good, the maximum roughness 5mm/m of steel plate.Complete conformance with standard.
Claims (1)
1. the quenching technology of a superstrength maritime works steel E690 super-thick steel plate, comprise the water yield of respectively organizing nozzle and quenching velocity on the control 20 mouth quenching press, it is characterized in that, its top roll is that draught is 0.2 ~ 0.5mm, roller table speed is 1.2 ~ 1.5m/min, and temperature is 910 ~ 930 ℃ before quenching, 9 ~ 15 ℃/s of rate of cooling, the back temperature of quenching is 10 ~ 30 ℃, and it is respectively organized the concrete parameter of nozzle and controls as following table:
The described nozzle of respectively organizing is narrow slit type nozzle, and wherein the 7th group to the 12nd group is high pressure section, and hydraulic pressure is 4 ~ 6Mpa; The 13rd group to the 20th group is low-pressure stage, and hydraulic pressure is 0.3 ~ 0.5Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310291750.4A CN103333996B (en) | 2013-07-12 | 2013-07-12 | Quenching process of ultra-high strength marine steel E690 super-thick steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310291750.4A CN103333996B (en) | 2013-07-12 | 2013-07-12 | Quenching process of ultra-high strength marine steel E690 super-thick steel plate |
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| Publication Number | Publication Date |
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| CN103333996A true CN103333996A (en) | 2013-10-02 |
| CN103333996B CN103333996B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310291750.4A Active CN103333996B (en) | 2013-07-12 | 2013-07-12 | Quenching process of ultra-high strength marine steel E690 super-thick steel plate |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061363A (en) * | 2010-11-25 | 2011-05-18 | 北京科技大学 | Direct quenching device for medium plate and quenching process thereof |
| CN102400043B (en) * | 2011-11-10 | 2013-09-25 | 舞阳钢铁有限责任公司 | Large-thickness steel plate for oceaneering |
| CN103740905A (en) * | 2013-12-26 | 2014-04-23 | 秦皇岛首秦金属材料有限公司 | Method for water-cooling steel plate over 80mm thick by quenching machine |
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- 2013-07-12 CN CN201310291750.4A patent/CN103333996B/en active Active
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| CN103333996B (en) | 2016-09-07 |
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