CN106636915A - Production method improving mechanical properties of steel material - Google Patents
Production method improving mechanical properties of steel material Download PDFInfo
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- CN106636915A CN106636915A CN201611020074.7A CN201611020074A CN106636915A CN 106636915 A CN106636915 A CN 106636915A CN 201611020074 A CN201611020074 A CN 201611020074A CN 106636915 A CN106636915 A CN 106636915A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The invention discloses a production method improving the mechanical properties of a steel material. The production method comprises the following steps: S1, putting raw materials in an electromagnetic induction furnace to smelt the raw materials, and casting a plate after smelting, wherein the following components in parts by weight are adopted as the raw materials: 0.3-0.4% of C, 3-5% of Mn, 7-8% of Al and Fe in balancing amount; S2, hot-rolling the plate at the hot-rolling temperature of 1,300-1,400 DEG C, stopping hot-rolling for 30 min, reducing the temperature to 1,000-1,100 DEG C, and performing hot-rolling again; performing cold-rolling at the cold-rolling temperature of 400-500 DEG C; and S3, performing heat treatment of a sheet at the heat treatment temperature of 500-700 DEC C, performing heat preservation for 1-1.5 h, and then blowing air with the relative humidity of 10-12% to the upper surface and the lower surface of the sheet all the time during a cooling process. The production method realizes the preparation of the high-strength steel material by controlling the composition of the raw materials and accurately controlling a construction technology at the same time.
Description
Technical field
The present invention relates to a kind of production method for improving ferrous materials mechanical property.
Background technology
High-strength steel sheet has the high characteristic of intensity, with excellent comprehensive mechanical property, can be used for manufacturing argosy
Oceangoing ship, bridge, power station equipment, middle high-pressure boiler, high-pressure bottle, rolling stock, hoisting machinery, mining machinery and other large-scale welderings
Binding component.But the technology of current high-strength steel sheet yet suffers from deficiency, the performance for causing high-strength steel sheet is also needed to into one
Step is lifted.
The content of the invention
For above-mentioned technical problem, the present invention has designed and developed a kind of production method for improving ferrous materials mechanical property.
The present invention provide technical scheme be：
A kind of production method for improving ferrous materials mechanical property, including：
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.3～0.4%, manganese 3～5%, aluminium 7～8%, remaining is that the content of iron, sulphur and phosphorus is controlled
System is below 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1300～1400 DEG C, is incubated 1～2 hour, stops 30 points
Clock, then temperature is reduced to into 1000～1100 DEG C, then hot rolling is carried out, temperature retention time 30～40 minutes；Cold rolling, cold rolling temperature is carried out again
Spend for 400～500 DEG C, cold rolling 4～5 times repeatedly, and process is aerated in cold-rolled process, blast velocity control is vertical 25～30
Side/minute, thickness is made for 5mm thick thin plate；
Step 3, thin plate is heat-treated, heat treatment temperature is 500～700 DEG C, after insulation 1～1.5 hour, with 10
DEG C/min speed temperature is reduced to into 200 DEG C, be incubated again, and the continuous surface of thin plate is blown, that what is blown is relatively wet
Spend for 30～35%, room temperature is cooled to afterwards, in cooling procedure, blow to the upper and lower surface of thin plate all the time relatively wet
Spend the wind for 10～12%.
Preferably, in the described production method for improving ferrous materials mechanical property, in the step 2, hot-rolled temperature
For 1400 DEG C, 1 hour is incubated.
Preferably, in the described production method for improving ferrous materials mechanical property, in the step 3, heat treatment temperature
Spend for 700 DEG C, be incubated 1 hour.
Preferably, in the described production method for improving ferrous materials mechanical property, adopt count by weight with
The following group is allocated as raw material：0.3～% of carbon, manganese 3%, aluminium 7%, remaining be the content of iron, sulphur and phosphorus control 0.001% with
Under.
Preferably, in the described production method for improving ferrous materials mechanical property, in the step 3, at heat
Lamella thickness after reason is 0.5～0.6mm.
The composition that the production method for improving ferrous materials mechanical property of the present invention passes through control raw material, while smart
Really control construction technology, realizes a kind of preparation of high strength steel iron material.
Specific embodiment
Below the present invention is described in further detail, with make those skilled in the art with reference to specification word being capable of evidence
To implement.
The present invention provides a kind of production method for improving ferrous materials mechanical property, including：
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.3～0.4%, manganese 3～5%, aluminium 7～8%, remaining is that the content of iron, sulphur and phosphorus is controlled
System is below 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1300～1400 DEG C, is incubated 1～2 hour, stops 30 points
Clock, then temperature is reduced to into 1000～1100 DEG C, then hot rolling is carried out, temperature retention time 30～40 minutes；Cold rolling, cold rolling temperature is carried out again
Spend for 400～500 DEG C, cold rolling 4～5 times repeatedly, and process is aerated in cold-rolled process, blast velocity control is vertical 25～30
Side/minute, thickness is made for 5mm thick thin plate；
Step 3, thin plate is heat-treated, heat treatment temperature is 500～700 DEG C, after insulation 1～1.5 hour, with 10
DEG C/min speed temperature is reduced to into 200 DEG C, be incubated again, and the continuous surface of thin plate is blown, that what is blown is relatively wet
Spend for 30～35%, room temperature is cooled to afterwards, in cooling procedure, blow to the upper and lower surface of thin plate all the time relatively wet
Spend the wind for 10～12%.
The composition that the present invention passes through control raw material, while precise control construction technology, makes prepared ferrous materials tool
Standby ultra-fine grain, embodies excellent comprehensive mechanical property, and the characteristic for especially possessing high intensity disclosure satisfy that actual production
Needs.
Preferably, in the described production method for improving ferrous materials mechanical property, in the step 2, hot-rolled temperature
For 1400 DEG C, 1 hour is incubated.
Preferably, in the described production method for improving ferrous materials mechanical property, in the step 3, heat treatment temperature
Spend for 700 DEG C, be incubated 1 hour.
Preferably, in the described production method for improving ferrous materials mechanical property, adopt count by weight with
The following group is allocated as raw material：0.3～% of carbon, manganese 3%, aluminium 7%, remaining be the content of iron, sulphur and phosphorus control 0.001% with
Under.
Preferably, in the described production method for improving ferrous materials mechanical property, in the step 3, at heat
Lamella thickness after reason is 0.5～0.6mm.
Embodiment one
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.3%, manganese 3%, aluminium 7%, remaining is that the content of iron, sulphur and phosphorus is controlled 0.001%
Below；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1400 DEG C, is incubated 1 hour, stops 30 minutes, then by temperature
Degree is reduced to 1000 DEG C, then carries out hot rolling, temperature retention time 30 minutes；Carry out again cold rolling, cold rolling temperature is 400 DEG C, repeatedly cold rolling 4
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 25 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 700 DEG C, after insulation 1 hour, with 10 DEG C/min of speed
Temperature is reduced to 200 DEG C by degree, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 963MPa, and yield strength is
652MPa, elongation percentage is 85.9%.
Embodiment two
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.4%, manganese 5%, aluminium 8%, remaining is that the content of iron, sulphur and phosphorus is controlled 0.001%
Below；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1300 DEG C, is incubated 2 hours, stops 30 minutes, then by temperature
Degree is reduced to 1100 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 500 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 30 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 500 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 969MPa, and yield strength is
652MPa, elongation percentage is 86.6%.
Embodiment three
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.35%, manganese 3.5%, aluminium 7.8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1350 DEG C, is incubated 2 hours, stops 30 minutes, then by temperature
Degree is reduced to 1100 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 500 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 30 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 500 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 965MPa, and yield strength is
653MPa, elongation percentage is 86.5%.
Example IV
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.35%, manganese 3.5%, aluminium 7.8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1350 DEG C, is incubated 1 hour, stops 30 minutes, then by temperature
Degree is reduced to 1050 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 450 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 30 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 500 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 969MPa, and yield strength is
651MPa, elongation percentage is 86.2%.
Embodiment five
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.35%, manganese 3.5%, aluminium 7.8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1350 DEG C, is incubated 2 hours, stops 30 minutes, then by temperature
Degree is reduced to 1050 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 460 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 25 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 500 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 968MPa, and yield strength is
651MPa, elongation percentage is 86.0%.
Embodiment six
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.4%, manganese 3.8%, aluminium 8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1400 DEG C, is incubated 2 hours, stops 30 minutes, then by temperature
Degree is reduced to 1100 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 450 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 28 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 600 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 960MPa, and yield strength is
658MPa, elongation percentage is 86.1%.
Embodiment seven
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.32%, manganese 3.4%, aluminium 7.4%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1350 DEG C, is incubated 2 hours, stops 30 minutes, then by temperature
Degree is reduced to 1100 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 500 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 30 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 650 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 965MPa, and yield strength is
653MPa, elongation percentage is 86.5%.
Embodiment eight
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.35%, manganese 3.5%, aluminium 7.8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1310 DEG C, is incubated 2 hours, stops 30 minutes, then by temperature
Degree is reduced to 1020 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 485 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 27 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 500 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 963MPa, and yield strength is
655MPa, elongation percentage is 86.0%.
Embodiment nine
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.35%, manganese 3.5%, aluminium 7.8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1400 DEG C, is incubated 2 hours, stops 30 minutes, then by temperature
Degree is reduced to 1045 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again cold rolling, cold rolling temperature is 500 DEG C, repeatedly cold rolling 5
It is secondary, and process is aerated in cold-rolled process, blast velocity control makes thickness for 5mm thick thin plate in 30 cubes/minute；
Step 3, thin plate is heat-treated, heat treatment temperature is 685 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 962MPa, and yield strength is
649MPa, elongation percentage is 86.5%.
Embodiment ten
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material is cast into after melting, using counting by weight
Following components as raw material：Carbon 0.35%, manganese 3.5%, aluminium 8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1300 DEG C, is incubated 1.3 hours, stops 30 minutes, then will
Temperature is reduced to 1008 DEG C, then carries out hot rolling, temperature retention time 40 minutes；Carry out again it is cold rolling, cold rolling temperature be 500 DEG C, it is repeatedly cold
Roll 5 times, and process is aerated in cold-rolled process, blast velocity control makes thickness for the thin of 5mm thickness in 30 cubes/minute
Plate；
Step 3, thin plate is heat-treated, heat treatment temperature is 623 DEG C, after insulation 1.5 hours, with 10 DEG C/min
Temperature is reduced to 200 DEG C by speed, is incubated again, and the continuous surface of thin plate is blown, and the relative humidity blown is 30～
35%, room temperature is cooled to afterwards, in cooling procedure, relative humidity is blowed for 10 to the upper and lower surface of thin plate all the time
～12% wind, the lamella thickness after heat treatment is 0.5mm.
The crystallite dimension of prepared ferrous materials is 2～5 μm.Its tensile strength reaches 965MPa, and yield strength is
653MPa, elongation percentage is 86.5%.
Comparative example
Prepared using common process, the crystallite dimension of prepared ferrous materials is 40～50 μm.Its tensile strength reaches
920MPa, yield strength is 611MPa, and elongation percentage is 80.1%.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in specification and embodiment
With, it can be applied to completely various suitable the field of the invention, for those skilled in the art, can be easily
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details.
Claims (5)
1. a kind of production method for improving ferrous materials mechanical property, it is characterised in that include：
Step one, raw material are inserted into melting in electromagnetic induction furnace, sheet material are cast into after melting, adopt count by weight with
The following group is allocated as raw material：Carbon 0.3～0.4%, manganese 3～5%, aluminium 7～8%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%；
Step 2, hot rolling is first carried out to sheet material, hot-rolled temperature is 1300～1400 DEG C, is incubated 1～2 hour, stops 30 minutes, then
Temperature is reduced to into 1000～1100 DEG C, then carries out hot rolling, temperature retention time 30～40 minutes；Carry out again cold rolling, cold rolling temperature is
400～500 DEG C, cold rolling 4～5 times repeatedly, and process is aerated in cold-rolled process, blast velocity control 25～30 cubes/
Minute, thickness is made for 5mm thick thin plate；
Step 3, thin plate is heat-treated, heat treatment temperature is 500～700 DEG C, after insulation 1～1.5 hour, with 10 DEG C/minute
Temperature is reduced to 200 DEG C by the speed of clock, is incubated again, and the continuous surface to thin plate is blown, and the relative humidity blown is
30～35%, room temperature is cooled to afterwards, in cooling procedure, blowing relative humidity to the upper and lower surface of thin plate all the time is
10～12% wind.
2. the production method of ferrous materials mechanical property is improved as claimed in claim 1, it is characterised in that the step 2
In, hot-rolled temperature is 1400 DEG C, is incubated 1 hour.
3. the production method of ferrous materials mechanical property is improved as claimed in claim 1, it is characterised in that the step 3
In, heat treatment temperature is 700 DEG C, is incubated 1 hour.
4. the production method of ferrous materials mechanical property is improved as claimed in claim 1, it is characterised in that using by weight
The following components of number meter is used as raw material：0.3～% of carbon, manganese 3%, aluminium 7%, remaining is that the content of iron, sulphur and phosphorus is controlled
Less than 0.001%.
5. the production method of ferrous materials mechanical property is improved as claimed in claim 1, it is characterised in that the step 3
In, the lamella thickness after heat treatment is 0.5～0.6mm.
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| JP2009249692A (en) * | 2008-04-07 | 2009-10-29 | Nippon Steel Corp | High rigidity steel sheet, and method for producing the same |
| JP2015520298A (en) * | 2012-05-31 | 2015-07-16 | アルセロルミタル・インベステイガシオン・イ・デサロジヨ・エセ・エレ | Hot or cold low density rolled steel, its method of implementation and use |
| CN104694816A (en) * | 2015-03-13 | 2015-06-10 | 北京科技大学 | Preparation method of high-Al medium manganese steel with strength and ductility product exceeding 30GPa% |
| CN105908089A (en) * | 2016-06-28 | 2016-08-31 | 宝山钢铁股份有限公司 | Low-density hot-dipped steel and manufacturing method thereof |
| CN106011652A (en) * | 2016-06-28 | 2016-10-12 | 宝山钢铁股份有限公司 | Cold-rolled low-density steel plate excellent in phosphating performance and manufacturing method of cold-rolled low-density steel plate |
| CN106011653A (en) * | 2016-07-05 | 2016-10-12 | 东北大学 | High-strength high-toughness low-density steel and manufacturing method thereof |
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