CN105385960A - Production process for hot rolled plate - Google Patents
Production process for hot rolled plate Download PDFInfo
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- CN105385960A CN105385960A CN201510847296.5A CN201510847296A CN105385960A CN 105385960 A CN105385960 A CN 105385960A CN 201510847296 A CN201510847296 A CN 201510847296A CN 105385960 A CN105385960 A CN 105385960A
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Abstract
The invention relates to a production process for a hot rolled plate, and relates to the technical field of machining of steel and iron metal. The hot rolled plate comprises, by mass, 0.025-0.04% of carbon, 0.02-0.04% of sulfur, 0.048-0.05% of phosphor, 0.08-0.15% of magnesium, 0.02-0.04% of aluminum, 0.05-0.08 % of silicon, 0.002-0.004% of silver, 0.001-0.003% of tungsten, 0.002-0.005% of iridium, 0,0015-0.002% of cobalt, 0.0003-0.0005% of technetium, 0.001-0.003% of osmium, 0.005-0.008% of lead, and the balance iron and unavoidable impurities. The production process for the hot rolled plate has the beneficial effects of reducing the production cost, and being simple to operate, high in accuracy, good in product quality and stable in production.
Description
Technical field
The present invention relates to ferrous metal processing technique field, especially a kind of production technique of hot-rolled sheet.
Background technology
Hot-rolled sheet, refers to hot-rolled steel plates and sheets, is that width is more than or equal to 600mm, and thickness is the steel plate of 0.35 ~ 200mm and thickness is the steel band of 1.2 ~ 25mm, and hot-rolled steel sheet has the various features such as hardness is low, handling ease, ductility are good.Hot rolling significantly can reduce energy consumption, reduces costs, and during hot rolling, Plastic Deformation is high, and resistance to deformation is low, greatly reduces the hot-rolled steel section energy expenditure of flow of metal; Hot rolling can improve the process industrial art performance of metal and alloy, and the coarse grain by as-cast condition is broken, and remarkable crack healing, reduces or eliminates casting flaw, changes as-cast structure into Deformation structure, puies forward heavy alloyed processing characteristics; Hot rolling adopts large ingot casting usually, and heavy reduction rolling not only increases production efficiency, and creates condition for improving roll speed, the serialization realizing the operation of rolling and automatization.Hot-rolled product is of many uses, is applicable to general structure steel and engineering hot-rolled steel sheet, steel band; Cold rolling, deep-draw product; The punching press of making automobile, tractor, crane tool, small-sized light industry civil aircraft tool and structural part; Make freight container and bare metal structural part; Automotive wheel special steel strip; Structure safety tread, stair, high ladder pedal etc.Under prior art, often occur that surface irregularity is rough, and production difficulty is high because working method is improper and cause the hot-rolled sheet quality produced unstable.
Summary of the invention
Instant invention overcomes shortcoming of the prior art, a kind of production technique of hot-rolled sheet is provided, can not only production cost be reduced, simple to operate, and precision is high, good product quality, administration measure.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of hot-rolled sheet, the moiety of described hot-rolled sheet comprises by mass percentage: carbon 0.025 ~ 0.04%, sulphur 0.02 ~ 0.04%, phosphorus 0.048 ~ 0.05%, magnesium 0.08 ~ 0.15%, aluminium 0.02 ~ 0.04%, silicon 0.05 ~ 0.08%, silver 0.002 ~ 0.004%, tungsten 0.001 ~ 0.003%, iridium 0.002 ~ 0.005%, cobalt 0.0015 ~ 0.002%, technetium 0.0003 ~ 0.0005%, osmium 0.001 ~ 0.003%, plumbous 0.005 ~ 0.008%, and all the other are iron and inevitable impurity.
Further, the production technique of described a kind of hot-rolled sheet, comprises the following steps:
(1) slab prepares: the slab received is carried out to slab number and checks, with lifting machine, slab is placed on slab storehouse, and different slab is number separated;
(2) heating and dephosphorization: reception slab block-by-block is hung on the charging roller of process furnace with lifting machine, carry out slab number again to check, weigh, survey length etc., finally slab is sent in process furnace by the interval block-by-block of 100 ~ 110s and heats, arranging Heating temperature is 1120 ~ 1250 DEG C, heat-up time is 100 ~ 120min, soaking time 180 ~ 220min, between soak, keep process furnace under certain air pressure, in process furnace, pass into the mixed gas be made up of by the volume ratio of 1:08 carbonic acid gas and nitrogen, intake is 10 ~ 20cmm; Then come out of the stove, carry out dephosphorization with high pressure water, remove slab scale on surface;
(3) roughing and finish rolling: the intermediate blank becoming 30 ~ 50mm thick step (2) described slab rolling with roughing mill, to control the width of intermediate blank during rolling, and with high pressure water, a dephosphorization job is carried out to intermediate blank, intermediate blank is out batched, flying shear; Then coiled strip finishing mill is rolled into the steel band that thickness is 1.5 ~ 12.5mm, goes out after finishing mill until rolled piece, by section cooling method, rolled piece is cooled to 630 ~ 650 DEG C with the speed of 3 DEG C ~ 5 DEG C/s, then batches, flying shear is carried out to afterbody;
(4) normalizing: carry out normalizing treatment to coil of strip by the temperature of 890 ~ 900 DEG C, insulation 250 ~ 300min, cools with the cold wind of 10 ~ 15 DEG C after taking out.
Further, described hot-rolled sheet moiety also comprises indium 0.002 ~ 0.005%.
Further, described hot-rolled sheet moiety also comprises germanium 0.002 ~ 0.005%.
Further, the described certain pressure of step (2) refers to 0.1 ~ 0.12MPa.
Compared with prior art, the invention has the beneficial effects as follows:
The production technique of a kind of hot-rolled sheet of the present invention, each step in the strict production control process of energy, carbonic acid gas and nitrogen gas is passed into when heating of plate blank, avoid slab, in heat-processed, chemical reaction occurs, affect quality product, and this processing method is simple to operate, cost of manufacture is low, upper and lower step compact construction, high efficiency.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
A kind of hot-rolled sheet, the moiety of described hot-rolled sheet comprises by mass percentage: carbon 0.03%, sulphur 0.023%, phosphorus 0.049%, magnesium 0.12%, aluminium 0.03%, silicon 0.06%, silver 0.003%, tungsten 0.002%, iridium 0.004%, cobalt 0.0018%, technetium 0.0004%, osmium 0.002%, plumbous 0.006%, and all the other are iron and inevitable impurity.
Further, the production technique of described a kind of hot-rolled sheet, comprises the following steps:
(1) slab prepares: the slab received is carried out to slab number and checks, with lifting machine, slab is placed on slab storehouse, and different slab is number separated;
(2) heating and dephosphorization: reception slab block-by-block is hung on the charging roller of process furnace with lifting machine, carry out slab number again to check, weigh, survey length etc., finally slab is sent in process furnace by the interval block-by-block of 105s and heats, arranging Heating temperature is 1135 DEG C, heat-up time is 110min, soaking time 200min, between soak, keep process furnace under certain air pressure, in process furnace, pass into the mixed gas be made up of by the volume ratio of 1:08 carbonic acid gas and nitrogen, intake is 15cmm; Then come out of the stove, carry out dephosphorization with high pressure water, remove slab scale on surface;
(3) roughing and finish rolling: the intermediate blank becoming 40mm thick step (2) described slab rolling with roughing mill, to control the width of intermediate blank during rolling, and with high pressure water, a dephosphorization job is carried out to intermediate blank, intermediate blank is out batched, flying shear; Then coiled strip finishing mill is rolled into the steel band that thickness is 8.5mm, goes out after finishing mill until rolled piece, by section cooling method, rolled piece is cooled to 640 DEG C with the speed of 4 DEG C/s, then batches, flying shear is carried out to afterbody;
(4) normalizing: carry out normalizing treatment to coil of strip by the temperature of 895 DEG C, insulation 280min, cools with the cold wind of 13 DEG C after taking out.
Further, described hot-rolled sheet moiety also comprises indium 0.003%.
Further, described hot-rolled sheet moiety also comprises germanium 0.003%.
Further, the described certain pressure of step (2) refers to 0.11MPa.
In stove, pass into nitrogen and nitrogen peroxide when heating of plate blank, slab can be avoided to issue biochemical reaction in the effect of high temperature, directly have influence on the quality of follow-up making steel plate.
Last it is noted that these are only the preferred embodiments of the present invention; be not limited to the present invention; although with reference to embodiment to invention has been detailed description; for a person skilled in the art; it still can be modified to the technical scheme described in foregoing embodiments; or equivalent replacement is carried out to wherein portion of techniques feature; but it is within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a hot-rolled sheet, it is characterized in that, the moiety of described hot-rolled sheet comprises by mass percentage: carbon 0.025 ~ 0.04%, sulphur 0.02 ~ 0.04%, phosphorus 0.048 ~ 0.05%, magnesium 0.08 ~ 0.15%, aluminium 0.02 ~ 0.04%, silicon 0.05 ~ 0.08%, silver 0.002 ~ 0.004%, tungsten 0.001 ~ 0.003%, iridium 0.002 ~ 0.005%, cobalt 0.0015 ~ 0.002%, technetium 0.0003 ~ 0.0005%, osmium 0.001 ~ 0.003%, plumbous 0.005 ~ 0.008%, and all the other are iron and inevitable impurity.
2. the production technique of a kind of hot-rolled sheet according to claim 1, is characterized in that, comprise the following steps:
(1) slab prepares: the slab received is carried out to slab number and checks, with lifting machine, slab is placed on slab storehouse, and different slab is number separated;
(2) heating and dephosphorization: reception slab block-by-block is hung on the charging roller of process furnace with lifting machine, carry out slab number again to check, weigh, survey length etc., finally slab is sent in process furnace by the interval block-by-block of 100 ~ 110s and heats, arranging Heating temperature is 1120 ~ 1250 DEG C, heat-up time is 100 ~ 120min, soaking time 180 ~ 220min, between soak, keep process furnace under certain air pressure, in process furnace, pass into the mixed gas be made up of by the volume ratio of 1:08 carbonic acid gas and nitrogen, intake is 10 ~ 20cmm; Then come out of the stove, carry out dephosphorization with high pressure water, remove slab scale on surface;
(3) roughing and finish rolling: the intermediate blank becoming 30 ~ 50mm thick step (2) described slab rolling with roughing mill, to control the width of intermediate blank during rolling, and with high pressure water, a dephosphorization job is carried out to intermediate blank, intermediate blank is out batched, flying shear; Then coiled strip finishing mill is rolled into the steel band that thickness is 1.5 ~ 12.5mm, goes out after finishing mill until rolled piece, by section cooling method, rolled piece is cooled to 630 ~ 650 DEG C with the speed of 3 DEG C ~ 5 DEG C/s, then batches, flying shear is carried out to afterbody;
(4) normalizing: carry out normalizing treatment to coil of strip by the temperature of 890 ~ 900 DEG C, insulation 250 ~ 300min, cools with the cold wind of 10 ~ 15 DEG C after taking out.
3. a kind of hot-rolled sheet according to claim 1, it is characterized in that, described hot-rolled sheet moiety also comprises indium 0.002 ~ 0.005%.
4. a kind of hot-rolled sheet according to claim 3, it is characterized in that, described hot-rolled sheet moiety also comprises germanium 0.002 ~ 0.005%.
5. the production technique of a kind of hot-rolled sheet according to claim 2, it is characterized in that, the described certain pressure of step (2) refers to 0.1 ~ 0.12MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510847296.5A CN105385960A (en) | 2015-11-26 | 2015-11-26 | Production process for hot rolled plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510847296.5A CN105385960A (en) | 2015-11-26 | 2015-11-26 | Production process for hot rolled plate |
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| CN105385960A true CN105385960A (en) | 2016-03-09 |
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| CN201510847296.5A Pending CN105385960A (en) | 2015-11-26 | 2015-11-26 | Production process for hot rolled plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262356A (en) * | 2018-01-23 | 2018-07-10 | 内蒙古工业大学 | Indium strip-rolling method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011234A (en) * | 2011-12-27 | 2014-08-27 | 杰富意钢铁株式会社 | Hot-rolled steel sheet and process for manufacturing same |
| CN104053806A (en) * | 2012-01-26 | 2014-09-17 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet and method for producing same |
| CN104159681A (en) * | 2012-03-06 | 2014-11-19 | 杰富意钢铁株式会社 | Warm press forming method and automobile frame component |
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2015
- 2015-11-26 CN CN201510847296.5A patent/CN105385960A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011234A (en) * | 2011-12-27 | 2014-08-27 | 杰富意钢铁株式会社 | Hot-rolled steel sheet and process for manufacturing same |
| CN104053806A (en) * | 2012-01-26 | 2014-09-17 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet and method for producing same |
| CN104159681A (en) * | 2012-03-06 | 2014-11-19 | 杰富意钢铁株式会社 | Warm press forming method and automobile frame component |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262356A (en) * | 2018-01-23 | 2018-07-10 | 内蒙古工业大学 | Indium strip-rolling method |
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