CN106148814A - A kind of automobile axle housing cold-pressed steel plate and production method thereof - Google Patents
A kind of automobile axle housing cold-pressed steel plate and production method thereof Download PDFInfo
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- CN106148814A CN106148814A CN201610737276.7A CN201610737276A CN106148814A CN 106148814 A CN106148814 A CN 106148814A CN 201610737276 A CN201610737276 A CN 201610737276A CN 106148814 A CN106148814 A CN 106148814A
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- Prior art keywords
- steel plate
- steel
- axle housing
- automobile axle
- cold
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Classifications
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- 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
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention relates to smelting iron and steel technique, particularly a kind of automobile axle housing cold-pressed steel plate and production method thereof.Chemical composition is prepared by following mass fraction: C:0.10～0.16%, Si:0.30～0.45%, Mn:1.45～1.60%, P≤0.015%, S≤0.005%, V:0.045～0.060%, Nb:0.015～0.030%, Als:0.025～0.050%, surplus is Fe.The present invention uses carbon structural steel to add trace V and Nb element, and reduces the content of P, S, changes rolling and cooling technique improves armor plate strength with suitable, improves the cold forming capability of steel plate.By mentioned component design and the design of the technological process of production, it is ensured that the property indices of steel plate, the index such as the mechanical property such as steel plate stretching, impact, ultrasonic examination is superior to like product.
Description
Technical field
The present invention relates to smelting iron and steel technique, particularly a kind of automobile axle housing cold-pressed steel plate and production method thereof.
Background technology
After at present automobile rear axle housing manufacture mainly uses heating, heat stamping and shaping and cold conditions steel plate directly strike out
Type, heating after heat punch forming process is relative complex, and cost increases, and uses the direct punch forming process of cold conditions steel plate easily to control
System, cost-saved.In addition high intensity levels steel plate is used to replace low-intensity level steel plate as case material, it is possible to realize vapour
The loss of weight of car is the trend of China Automobile Industry.
In prior art, disclosed correlation technique content such as patent publication No. is that the Chinese invention of CN 104630629 A is special
Profit discloses a kind of automobile axle housing steel and preparation method thereof, and the method proposes to add Nb, Ti microalloy element in right amount, and controls
N content processed, use appropriateness controlled rolling and control cooling, it is thus achieved that 600MPa level steel and have excellence mechanical property and
Processability.Patent publication No. is that the patent of invention of CN 104213019 A discloses a kind of 600MPa level automobile axle housing steel
And production method, this steel uses V-N strengthening, and wherein chemical composition is C:0.21～0.26%, Si:0.51～0.60%, Mn:
1.1～1.5%, P :≤0.020%, S :≤0.010%, Al:0.01～0.06%, V:0.05～0.06%, N:0.012～0.016%.
It, by designing V, N content and controlled rolling and Controlled cooling process accurately, produces 600MPa level automobile axle housing hot rolling
Strip steel.The described strip steel of this invention uses thermoforming process in axle housing produces, and production technology uses V-N to strengthen, and the present invention
Use V, Nb microalloy element to improve armor plate strength, and use cold-press process when axle housing produces.
Although above-mentioned patent discloses 600MPa level automobile axle housing steel, but technique is outmoded, percent defective is high, iron and steel formula
Being not suitable with the direct punch forming process of cold conditions steel plate, product quality disunity during mass production, product total quality declines, directly
Connect and affect vehicle safety.
Summary of the invention
The present invention solves the deficiencies in the prior art and provides the automobile axle housing that a kind of steel performance is excellent, mass quality is unified
By cold-pressed steel plate and production method thereof.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of automobile axle housing cold-pressed steel plate, chemical composition prepared by following mass fraction: C0.10～0.16%, Si0.30～
0.45%, Mn1.45～1.60%, P≤0.015%, S≤0.005%, V0.045～0.060%, Nb0.015～0.030%,
Als0.025～0.050%, surplus is Fe.
The production method of a kind of automobile axle housing cold-pressed steel plate, comprises the steps:
A, converter smelting
Formula according to claim 1 is prepared and prepares molten steel by converter smelting, smelts oxygen bottom blowing number of times therebetween and is less than or equal to 2
Secondary, tapping process is avoided slag；
B, LF stove refine
Employing white slag is smelted, white slag retention time >=15min；
C:, continuous casting
Continuous casting overall process uses nitrogen molding casting, enters burial pit slow cooling 48h after continuous casting billet cutting；
D, heating
Soaking zone 1170～1220 DEG C, soaking time 10～12min；
E, rolling
Using two-phase control rolling, steel billet one stage start rolling temperature 1050～1090 DEG C, 1.5 that temperature thickness is finished product thickness treated by steel billet
～3 times, two-stage start rolling temperature at 880～920 DEG C, finishing temperature 780～820 DEG C；
F, control cold
Rate of cooling is 5～10 DEG C/s, final cooling temperature 630～680 DEG C.
In described step E, finished product thickness is 12～25mm.
The invention have the benefit that
A kind of automobile axle housing cold-pressed steel plate, chemical composition prepared by following mass fraction: C:0.10～0.16%, Si:0.30～
0.45%, Mn:1.45～1.60%, P≤0.015%, S≤0.005%, V:0.045～0.060%, Nb:0.015～0.030%,
Als:0.025～0.050%, surplus is Fe.The present invention uses carbon structural steel to add trace V and Nb element, and reduce P,
The content of S, improves armor plate strength with suitable change rolling and cooling technique, improves the cold forming capability of steel plate.
The function analysis of above-mentioned chemical element is as follows: the intensity of steel plate, low-temperature flexibility, welding performance are all played important by C
Effect.Carbon content control too low, then it is impossible to ensure that intensity, during too high levels, then welding performance and low-temperature flexibility are more difficult
Control.Si is the essential elements of deoxidation in steel making, can increase the intensity of material, but damage low-temperature flexibility and the weldability of material
Can, therefore content can not be the biggest.Mn is typical austenite stabilizer element, it is possible to increase the quenching degree of steel, and plays solid solution
Strengthening and the effect of fining ferrite grains, under the conditions of low-carbon (LC), the intensity for raising material has obvious action.P has
Certain cold brittleness, unfavorable to welding, belong to harmful element, should try one's best to low content control.S is easily formed sulphide inculsion, tool
There is certain red brittleness, belong to harmful element, should try one's best to low content control.V is a kind of grain refining element, can improve strong
Degree and toughness, reduce superheated susceptivity, improves high temperature creep property.But because having aged brittleness, content can not be the highest.Nb has
There is a preferable refined crystalline strengthening effect, and the toughness of steel plate can be improved, reduce ductile-brittle transition temperature, and Nb content can not be too
On the one hand height, is that Nb belongs to precious metal element, controls addition and may be controlled to this, be on the other hand Nb content higher time steel plate
Surface is easily formed micro-crack, is not easy to cold working.Al is the deoxidizer in steel, forms AlN, can improve the thermally-stabilised of steel in steel
Property, but low-temperature flexibility and the impact of steel during too high levels, can be affected.
The production method of a kind of automobile axle housing cold-pressed steel plate, comprises the steps: that the formula according to claim 1 is prepared also
Prepare molten steel by converter smelting, smelt oxygen bottom blowing number of times therebetween and, less than or equal to 2 times, tapping process is avoided slag；Reduce
Oxygen content in steel, it is to avoid slag is for reducing impurity in steel.Employing white slag is smelted, white slag retention time >=15min；Reduce in molten steel
Oxygen content, it is to avoid oxide is mingled with, improve steel quality.Continuous casting overall process uses nitrogen molding casting, after continuous casting billet cutting
Enter burial pit slow cooling 48h；Improving Surface Quality of Steel Billet, slow cooling can avoid that billet surface cooling rate is too fast cracks defect.Soaking
Section 1170～1220 DEG C, soaking time 10～12min；Use two-phase control rolling, steel billet one stage start rolling temperature 1050～1090
DEG C, 1.5～3 times that temperature thickness is finished product thickness treated by steel billet, two-stage start rolling temperature at 880～920 DEG C, finishing temperature 780～
820℃；Rate of cooling is 5～10 DEG C/s, final cooling temperature 630～680 DEG C.Make steel plate be organized as ferrite and pearlite, both carried
High intensity necessarily, can make again steel plate toughness make moderate progress.1.5～3 times that temperature thickness is finished product thickness treated by steel billet.Described step
In rapid E, finished product thickness is 12～25mm.By mentioned component design and the design of the technological process of production, it is ensured that steel plate every
Performance indications, the index such as the mechanical property such as steel plate stretching, impact, ultrasonic examination is superior to like product.
Accompanying drawing explanation
Fig. 1 is that the present invention produces steel near surface metallographic structure schematic diagram；
Fig. 2 is that the present invention produces steel centre metallographic structure schematic diagram.
Detailed description of the invention
A kind of automobile axle housing cold-pressed steel plate, it is characterised in that chemical composition is prepared by following mass fraction: C:0.10～
0.16%, Si:0.30～0.45%, Mn:1.45～1.60%, P≤0.015%, S≤0.005%, V:0.045～0.060%, Nb:
0.015～0.030%, Als:0.025～0.050%, surplus is Fe.
The production method of a kind of automobile axle housing cold-pressed steel plate, comprises the steps:
A, converter smelting
Prepare by above-mentioned formula and prepare molten steel by converter smelting, smelting oxygen bottom blowing number of times therebetween and, less than or equal to 2 times, tap
During avoid slag；
B, LF stove refine
Employing white slag is smelted, white slag retention time >=15min；
C:, continuous casting
Continuous casting overall process uses nitrogen molding casting, enters burial pit slow cooling 48h after continuous casting billet cutting；
D, heating
Soaking zone 1170～1220 DEG C, soaking time 10～12min；
E, rolling
Using two-phase control rolling, steel billet one stage start rolling temperature 1050～1090 DEG C, 1.5 that temperature thickness is finished product thickness treated by steel billet
～3 times, finished product thickness is 12～25mm, two-stage start rolling temperature at 880～920 DEG C, finishing temperature 780～820 DEG C；
F, control cold
Rate of cooling is 5～10 DEG C/s, final cooling temperature 630～680 DEG C.
Embodiment 1
C:0.15%, Si:0.4%, Mn:1.5%, P≤0.015%, S≤0.005%, V:0.05%, Nb:0.02%, Als:0.04%, remaining
Amount is Fe and a small amount of impurity.
Embodiment 2
C:0.16%, Si:0.45%, Mn:1.60%, P≤0.015%, S≤0.005%, V:0.060%, Nb:0.030%, Als:
0.050%, surplus is Fe and a small amount of impurity.
Embodiment 3
C:0.10%, Si:0.30%, Mn:1.45%, P≤0.015%, S≤0.005%, V:0.045%, Nb:0.015%, Als:
0.025%, surplus is Fe and a small amount of impurity.
Embodiment 1 to 3 all uses said method to produce.Embodiment 1 to 3 steel detection data are as follows:
600MPa level automobile axle housing Standard of steel is all reached by above table and Fig. 1, above-mentioned steel shown in 2, steel plate stretching,
The indexs such as mechanical property, ultrasonic examination such as impact are superior to like product, meet automobile axle housing manufacturer production requirement.
Claims (3)
1. an automobile axle housing cold-pressed steel plate, it is characterised in that chemical composition by following mass fraction prepare: C0.10～
0.16%, Si0.30～0.45%, Mn1.45～1.60%, P≤0.015%, S≤0.005%, V0.045～0.060%, Nb0.015
～0.030%, Als0.025～0.050%, surplus is Fe.
The production method of a kind of automobile axle housing cold-pressed steel plate the most according to claim 1, it is characterised in that include as follows
Step:
A, converter smelting
Formula according to claim 1 is prepared and prepares molten steel by converter smelting, smelts oxygen bottom blowing number of times therebetween and is less than or equal to 2
Secondary, tapping process is avoided slag；
B, LF stove refine
Employing white slag is smelted, white slag retention time >=15min；
C, continuous casting
Continuous casting overall process uses nitrogen molding casting, enters burial pit slow cooling 48h after continuous casting billet cutting；
D, heating
Soaking zone 1170～1220 DEG C, soaking time 10～12min；
E, rolling
Using two-phase control rolling, steel billet one stage start rolling temperature 1050～1090 DEG C, 1.5 that temperature thickness is finished product thickness treated by steel billet
～3 times, two-stage start rolling temperature at 880～920 DEG C, finishing temperature 780～820 DEG C；
F, control cold
Rate of cooling is 5～10 DEG C/s, final cooling temperature 630～680 DEG C.
The production method of a kind of automobile axle housing cold-pressed steel plate, it is characterised in that in described step E
Finished product thickness is 12～25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737276.7A CN106148814A (en) | 2016-08-29 | 2016-08-29 | A kind of automobile axle housing cold-pressed steel plate and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737276.7A CN106148814A (en) | 2016-08-29 | 2016-08-29 | A kind of automobile axle housing cold-pressed steel plate and production method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN106148814A true CN106148814A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610737276.7A Pending CN106148814A (en) | 2016-08-29 | 2016-08-29 | A kind of automobile axle housing cold-pressed steel plate and production method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793774A (en) * | 2020-07-01 | 2020-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 620MPa grade automobile axle housing cold stamping steel plate and preparation method thereof |
| CN111893385A (en) * | 2020-07-31 | 2020-11-06 | 山东钢铁股份有限公司 | Steel plate for axle housing of automobile axle and preparation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609254A (en) * | 2003-10-21 | 2005-04-27 | 酒泉钢铁(集团)有限责任公司 | Micro alloyed steel and application thereof |
| CN101886220A (en) * | 2010-07-16 | 2010-11-17 | 攀钢集团钢铁钒钛股份有限公司 | Hot continuous rolling steel plate for cold forming and production method thereof |
| CN102071358A (en) * | 2011-01-26 | 2011-05-25 | 天津钢铁集团有限公司 | Low-alloy and high-intensity steel plate with yield strength being 550MPa level and production method |
| CN102864384A (en) * | 2012-08-31 | 2013-01-09 | 中国重汽集团济南动力有限公司 | High-strength automobile axle housing material and method for manufacturing axle housing |
-
2016
- 2016-08-29 CN CN201610737276.7A patent/CN106148814A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609254A (en) * | 2003-10-21 | 2005-04-27 | 酒泉钢铁(集团)有限责任公司 | Micro alloyed steel and application thereof |
| CN101886220A (en) * | 2010-07-16 | 2010-11-17 | 攀钢集团钢铁钒钛股份有限公司 | Hot continuous rolling steel plate for cold forming and production method thereof |
| CN102071358A (en) * | 2011-01-26 | 2011-05-25 | 天津钢铁集团有限公司 | Low-alloy and high-intensity steel plate with yield strength being 550MPa level and production method |
| CN102864384A (en) * | 2012-08-31 | 2013-01-09 | 中国重汽集团济南动力有限公司 | High-strength automobile axle housing material and method for manufacturing axle housing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793774A (en) * | 2020-07-01 | 2020-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 620MPa grade automobile axle housing cold stamping steel plate and preparation method thereof |
| CN111893385A (en) * | 2020-07-31 | 2020-11-06 | 山东钢铁股份有限公司 | Steel plate for axle housing of automobile axle and preparation method |
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Application publication date: 20161123 |
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