CN103952635B - High-strength steel of manganese and silicon containing and preparation method thereof - Google Patents
High-strength steel of manganese and silicon containing and preparation method thereof Download PDFInfo
- Publication number
- CN103952635B CN103952635B CN201410200991.8A CN201410200991A CN103952635B CN 103952635 B CN103952635 B CN 103952635B CN 201410200991 A CN201410200991 A CN 201410200991A CN 103952635 B CN103952635 B CN 103952635B
- Authority
- CN
- China
- Prior art keywords
- steel
- temperature
- hours
- equal
- less
- Prior art date
- 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.)
- Active
Links
Abstract
The present invention relates to structural alloy steel and preparation method thereof, specifically high-strength steel of manganese and silicon containing and preparation method thereof.The high-strength steel of manganese and silicon containing, it is made up of according to percentage by weight following material, C:0.17～0.21%, Si:0.80～1.20%, Mn:1.90～2.30%, Mo:0.30～0.40%, Ti:0.03～0.13%, Al:0.015～0.035%, Cr:0.10～0.20%, P: less than or equal to 0.012%, S: less than or equal to 0.010%, surplus is Fe.High-strength steel of manganese and silicon containing that the present invention provides and preparation method thereof, use micro-alloying technology, add suitable micro alloying element Al, Ti, crystal grain thinning and tissue, improve the degree of purity of material, obtained the material of bainite structure by the preparation method of the present invention, improve obdurability and the low-temperature impact toughness of steel, overcome the defect existing for prior art.
Description
Technical field
The present invention relates to structural alloy steel and preparation method thereof, specifically manganese and silicon containing high-strength steel and
Preparation method.
Background technology
GB 20SiMn2MoV material chemical composition is at present: 0.17-0.23%C, 0.90-1.20%Si,
2.20-2.60%Mn, 0.30-0.40%Mo, 0.05-0.12%V, Max0.025%P, Max0.025%S, Max0.
25%Cu, Max0.30%Cr, Max0.30%Ni.Then it is heated to 900 DEG C ± 10 DEG C insulation 3h at sample
At oil quenching, austenitization carries out the most thorough, and austenite crystal is fully grown up, quenching structure
Roughening, at 250 DEG C be tempered, it is thus achieved that tissue be mainly tempered martensite, tensile strength
Rm >=1380Mpa, elongation after fracture A >=10%, shrinkage factor Z >=40% of having no progeny, impact absorbing energy
Aku2 >=55J, is organized as tempered martensite after heat treatment.Although this material has higher intensity with hard
Degree, but corresponding toughness is relatively low.
Summary of the invention
High-strength steel new material that it is an object of the invention to provide a kind of manganese and silicon containing and preparation method thereof, this material
Material has high intensity and has again high tenacity simultaneously, for reaching above-mentioned purpose, and technical scheme
It is:
The high-strength steel of manganese and silicon containing, is made up of according to percentage by weight following material, C:0.17～0.21%,
Si:0.80～1.20%, Mn:1.90～2.30%, Mo:0.30～0.40%, Ti:0.03～0.13%,
Al:0.015～0.035%, Cr:0.10～0.20%, P: less than or equal to 0.012%, S: be less than or equal to
0.010%, surplus is Fe.
Preferably: C:0.18～0.20%, Si:0.85-1.15%, Mn:2.00～2.20%, Mo:0.32～0.38%,
Ti:0.04～0.10%, Al:0.020～0.030%, Cr:0.12～0.18%, P: less than or equal to 0.010%,
S: less than or equal to 0.008%, surplus is Fe.
Optimum proportioning: C:0.19%, Si:1.00%, Mn:2.10%, Mo:0.35%, Ti:0.08%,
Al:0.025%, Cr:0.16%, P be less than or equal to 0.008%, S: less than or equal to 0.005%, surplus
For Fe.
The high-strength steel preparation method of manganese and silicon containing, comprises the following steps:
(1) every stove allocates molten iron or the pig iron into, heats and is fused into molten steel, tapping temperature 1580 DEG C～1620 DEG C,
P percentage by weight controls≤0.007%；When molten steel tap reaches the 1/3 of total amount, want according to formula
Input Si-Fe alloy, Mn-Fe alloy, Mo-Fe alloy in ladle is asked to carry out composition initial adjustment；
(2) molten steel feeds aluminum steel to refine station, adds C powder, Si powder, expand after bitsization are good
Dissipate deoxidation, slag rear sample analysis in vain, it is finely adjusted composition according to analysis result；
(3) molten steel after fine setting feeds CaSi line by 2 meters/t, and then vacuum is less than or equal to 67Pa
Lower retention time 10～15 minutes；
(4) add heat preserving agent after molten steel diffuses, carry out soft argon blowing time 20～25 minutes, with top of the slag fine motion,
The most exposed molten steel is as the criterion；
(5) ingot casting during ingot mould poured into by molten steel, uses argon for protecting pouring, and ingot mold temperature is
30～80 DEG C；
(6) Heating Steel Ingots temperature 1200～1220 DEG C, temperature retention time 6 hours, programming rate controls
60～80 DEG C/h；
(7), after steel ingot fire is cut into steel, in 20 minutes, steel are put into the intermediate layer of burial pit, slow cooling
60 hours, steel temperature hung out burial pit less than 150 DEG C；
(8) steel surface, to shove charge after the Defect removal of steel surface, quenching, quenching temperature
900～920 DEG C, programming rate 100 DEG C/h, equal temperature time 2～3 hours, temperature retention time 2.5～3.5
Hour, from coming out of the stove to water, the time that controls is within 5 minutes；
(9) shove charge tempering in 3 hours, the heating-up temperature 540 of tempering～580 DEG C after quenching, heat up
Speed 50 DEG C/h, equal temperature time 2～3 hours, temperature retention time 6.5～7.5 hours.
High-strength steel of manganese and silicon containing that the present invention provides and preparation method thereof, uses micro-alloying technology, adds
Enter suitable micro alloying element Al, Ti, crystal grain thinning and tissue, improve the degree of purity of material, logical
The preparation method crossing the present invention obtains the material of bainite structure, improves obdurability and the low-temperature impact of steel
Toughness, overcomes the defect existing for prior art.
The high-strength steel preparation method of the manganese and silicon containing that the present invention provides, relies on the most merely C and alloying element
Total amount improve steel intensity, by the dislocation strengthening in bainite structure, fine grain strengthening, micro-conjunction
The precipitation strength of gold improves intensity and toughness.
C: the carbon content control in steel is below 0.25%, and steel is through influence of high austenizing temp and thermal deformation
After cooling procedure in, no longer occur the austenite two phase decompositions to ferrite Yu cementite, supercool Austria
Family name's body translates directly into the ferrite of various form and leaves the retained austenite of a small amount of rich carbon.Additionally
Necessary carbon content, is typically not less than 0.01%, acts primarily as the effect of solution strengthening.The most a part of carbon
Atom will separate out microalloy carbide with trace Nb, Ti effect added, and ties in hot stage suppression again
Brilliant and cold stage plays precipitation strength effect.
Mo: postpone perlitic transformation, and the retardation function to bainite transformation is less.Mild steel adds
Enter Ni and can meet the requirement of high intensity and high tenacity, but the addition of Ni is inevitable the highest, relatively costly,
And add Mo, Mn and can obtain more more preferable effect than Ni, and more economical.
Mn: be the alloying element strongly postponing perlitic transformation, is conducive to improving the quenching degree of steel and leading to
Cross solution strengthening effect and improve intensity.It addition, add Mn alternative part precious metal Mo to postpone pearl
Body of light changes, and improves bainite quenching degree.
Si: along with Si content brings up to 1.8% from 0.6%, impact wear resistance improves.It addition, Si is significantly
Reinforced ferrite, every 1%Mn makes ferrite yield strength improve 33MPa, and every 1%Si makes ferrite surrender
Intensity improves 85MPa.
Si in addition to having its static stabilization of promotion to retained austenite, it is also possible to plays the effect of solution strengthening
Improve the anti-temper brittleness of low temperature of steel；Carbide is precipitated with inhibition, reduces the transformation of bainite
Temperature, is the advantageous elements of the obdurability improving steel, in steel during Si too high levels, ＞ 1.8%, not only
The obdurability that can not improve steel there is also adverse consequences.
Cr: chromium can strengthen mechanical performance and the wearability of steel, resisting after the quenching degree of increase steel and quenching
Deformability, strengthens the elasticity of steel, diamagnetism, corrosion resistance and thermostability.
Ti:Ti is main presented in TiC or Ti (C, N) in steel.Ti has prevention deformed austeaite
The effect of recrystallization, can be with crystal grain thinning；Additionally, also have the effect promoting that bainite is formed.At material
When Ti content is suitably 0.01～0.018% in material, the requirement of each side, higher Ti content could be met
The prevention crystal grain effect of growing up can not be played by causing thick liquid to separate out the appearance of TiN.
Ti can improve the uniformity of steel, but addition is unsuitable too much, is formed because these elements are disperse phase
Element, the second phase of disperse is too much, and elongation after fracture can be caused to decline.
The high-strength steel of the manganese and silicon containing of system of the present invention enough guarantee impurity element and elemental gas S≤5ppm,
P≤80ppm、N≤60ppm、0≤10ppm、H≤1.3ppm。
Detailed description of the invention
It is described in conjunction with the embodiments the detailed description of the invention of the present invention.
Embodiment 1:
The high-strength steel of manganese and silicon containing, is made up of according to percentage by weight following material, C:0.19%, Si:
1.00%, Mn:2.10%, Mo:0.35%, Ti:0.08%, Al:0.025%, Cr:0.16%,
P is less than or equal to 0.008%, S: less than or equal to 0.005%, and surplus is Fe.
Embodiment 2:
The high-strength steel of manganese and silicon containing, is made up of according to percentage by weight following material, C:0.17%, Si:
1.20%, Mn:2.30%, Mo:0.40%, Ti:0.03%, Al:0.015%, Cr:0.20%,
P: less than or equal to 0.012%, S: less than or equal to 0.010%, surplus is Fe.
Embodiment 3:
The high-strength steel of manganese and silicon containing, is made up of according to percentage by weight following material, C:0.21%, Si:
0.80%, Mn:1.90%, Mo:0.30%, Ti:0.13%, Al:0.035%, Cr:0.10%,
P: less than or equal to 0.010%, S: less than or equal to 0.008%, surplus is Fe.
Embodiment 4:
The high-strength steel of manganese and silicon containing, is made up of according to percentage by weight following material, C:0.18%, Si:
1.15%, Mn:2.00%, Mo:0.32%, Ti:0.10%, Al:0.030%, Cr:0.18%,
P: less than or equal to 0.010%, S: less than or equal to 0.008%, surplus is Fe.
Above example prepares the high-strength steel of manganese and silicon containing according to following steps, comprises the following steps:
1, every stove allocates molten iron or the pig iron into, heats and is fused into molten steel, tapping temperature 1580 DEG C～1620 DEG C,
P percentage by weight controls≤0.007%；When molten steel tap reaches the 1/3 of total amount, according to recipe requirements
In ladle, input Si-Fe alloy, Mn-Fe alloy, Mo-Fe alloy carry out composition initial adjustment；
2, molten steel feeds aluminum steel to refine station, adds C powder, Si powder, be diffused after bitsization are good
Deoxidation, slag rear sample analysis in vain, it is finely adjusted composition according to analysis result；
3, the molten steel after fine setting feeds CaSi line by 2 meters/t, and then vacuum keeps less than or equal under 67Pa
Time 10～15 minutes；
4, add heat preserving agent after molten steel diffuses, carry out soft argon blowing time 20～25 minutes, with top of the slag fine motion,
The most exposed molten steel is as the criterion；
5, ingot casting during ingot mould poured into by molten steel, uses argon for protecting pouring, and ingot mold temperature is 30～80 DEG C；
6, Heating Steel Ingots temperature 1200～1220 DEG C, temperature retention time 6 hours, programming rate controls at 60～80 DEG C
/ hour；
7, after steel ingot fire is cut into steel, in 20 minutes, enter to put into steel the intermediate layer of burial pit, slow cooling
60 hours, steel temperature hung out burial pit less than 150 DEG C；
8, steel surface, the Defect removal shove charge to steel quenches, quenching temperature 900～920 DEG C,
Programming rate 100 DEG C/h, equal temperature time 2～3 hours, temperature retention time 2.5～3.5 hours, from coming out of the stove
To entering water, within controlling the time 5；
9, after quenching, in 3 hours, shove charge is tempered, the heating-up temperature 540 of tempering～580 DEG C, programming rate
50 DEG C/h, equal temperature time 2～3 hours, temperature retention time 6.5～7.5 hours.
Above example high-strength steel and the current conventional formulation of manganese and silicon containing and production technology produce
20SiMn2MoV compares, and has comprehensive mechanical property and the serviceability of excellence, and concrete test case is shown in
Shown in following table:
Table 1 steel test result contrast table
It will be seen that the high-strength steel of manganese and silicon containing of the present invention i.e. has certain impact flexibility from upper table,
There is again excellent intensity, good combination property.The use of the high-strength steel new material of the manganese and silicon containing of the present invention
Life-span more traditional 20SiMn2MoV improves 30-50%.
Claims (1)
1. the high-strength steel preparation method of manganese and silicon containing, comprises the following steps:
It is made up of according to percentage by weight following material, C:0.17～0.21%, Si:0.80～1.20%, Mn:1.90～2.30%, Mo:0.30～0.40%, Ti:0.03～0.13%, Al:0.015～0.035%, Cr:0.10～0.20%, P: less than or equal to 0.012%, S: less than or equal to 0.010%, surplus is Fe；
(1) every stove allocates molten iron or the pig iron into, and heating is fused into molten steel, and tapping temperature 1580 DEG C～1620 DEG C, P percentage by weight controls≤0.007%；When molten steel tap reaches the 1/3 of total amount, throw in Si-Fe alloy according to recipe requirements in ladle, Mn-Fe alloy, Mo-Fe alloy carry out composition initial adjustment；
(2) molten steel feeds aluminum steel to refine station, adds C powder, Si powder, be diffused deoxidation after bitsization are good, slag rear sample analysis in vain, is finely adjusted composition according to analysis result；
(3) molten steel after fine setting feeds CaSi line by 2 meters/t, and then vacuum is less than or equal to 67Pa lower retention time 10～15 minutes；
(4) adding heat preserving agent after molten steel diffuses, carry out soft argon blowing time 20～25 minutes, with top of the slag fine motion, the most exposed molten steel is as the criterion；
(5) ingot casting during ingot mould poured into by molten steel, uses argon for protecting pouring, and ingot mold temperature is 30～80 DEG C；
(6) Heating Steel Ingots temperature 1200～1220 DEG C, temperature retention time 6 hours, programming rate controls at 60～80 DEG C/h；
(7) after steel ingot fire is cut into steel, steel being put in 20 minutes the intermediate layer of burial pit, slow cooling 60 hours, steel temperature hangs out burial pit less than 150 DEG C；
(8) steel surface, to shove charge after the Defect removal of steel surface, quenching, quenching temperature 900～920 DEG C, programming rate 100 DEG C/h, equal temperature time 2～3 hours, temperature retention time 2.5～3.5 hours, from coming out of the stove to water, the time that controls is within 5 minutes；
(9) after quenching, in 3 hours, shove charge is tempered, the heating-up temperature 540 of tempering～580 DEG C, programming rate 50 DEG C/h, equal temperature time 2～3 hours, temperature retention time 6.5～7.5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200991.8A CN103952635B (en) | 2014-05-13 | 2014-05-13 | High-strength steel of manganese and silicon containing and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200991.8A CN103952635B (en) | 2014-05-13 | 2014-05-13 | High-strength steel of manganese and silicon containing and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103952635A CN103952635A (en) | 2014-07-30 |
| CN103952635B true CN103952635B (en) | 2016-09-14 |
Family
ID=51329980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410200991.8A Active CN103952635B (en) | 2014-05-13 | 2014-05-13 | High-strength steel of manganese and silicon containing and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103952635B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093099A (en) * | 2018-09-30 | 2018-12-28 | 宁波市镇海甬鼎紧固件制造有限公司 | A kind of low temperature resistant high-strength nut and its production method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10237547A (en) * | 1997-02-27 | 1998-09-08 | Kobe Steel Ltd | Cold rolled steel sheet with high ductility and high strength, and its production |
| EP1990431A1 (en) * | 2007-05-11 | 2008-11-12 | ArcelorMittal France | Method of manufacturing annealed, very high-resistance, cold-laminated steel sheets, and sheets produced thereby |
| CN101928875A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | High-strength cold-rolled plate with favorable forming property and preparation method thereof |
| JP5771034B2 (en) * | 2010-03-29 | 2015-08-26 | 株式会社神戸製鋼所 | Ultra-high strength steel plate with excellent workability and manufacturing method thereof |
-
2014
- 2014-05-13 CN CN201410200991.8A patent/CN103952635B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103952635A (en) | 2014-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105506494B (en) | A kind of yield strength 800MPa grade high ductilities hot-rolling high-strength steel and its manufacture method | |
| CN103014554B (en) | Low-yield-ratio high-tenacity steel plate and manufacture method thereof | |
| CN101717893B (en) | 55Si2MnVNbN spring steel and production process thereof | |
| CN101270453B (en) | Ultrahigh-strength thermal forming martensitic steel | |
| CN109652733B (en) | 690 MPa-grade super-thick steel plate and manufacturing method thereof | |
| CN102676945B (en) | Easily-weldable tempered high-strength ductile steel plate used in hydroelectric projects and production method thereof | |
| CN103710622A (en) | 690MPa-yield-strength low-yield-tensile-ratio antiseismic steel and manufacturing method thereof | |
| CN109957707A (en) | A kind of 1000MPa grades of fastener weather-proof the cold heading steel and its production method | |
| CN106319390A (en) | X70 large deformation resisting pipeline steel and manufacturing method | |
| CN103667912B (en) | The heat treating method of a kind of Low Alloy Steel Plate and steel plate | |
| CN104988417A (en) | Corrosion-resistant structure steel plate for bridge with yield strength being 485MPa and production method thereof | |
| CN107130172B (en) | 400HBW grades of Brinell hardness whole constrictive type high tenacity easily weld special thick wear-resisting steel plate and its manufacturing method | |
| CN110358965A (en) | 100 grades a kind of or more high-test chain wire rod and its manufacturing method | |
| CN109355579A (en) | A kind of high temperature pressure vessel super-thick steel plate 12Cr2Mo1VR and its production technology | |
| CN102864383B (en) | Low alloy steel | |
| CN102304670A (en) | Steel plate with -40 DEG C strain aging and high toughness and production method thereof | |
| JP6684353B2 (en) | Thick plate steel excellent in low temperature toughness and hydrogen induced cracking resistance, and method of manufacturing the same | |
| CN102400063A (en) | Ultra-high strength hull and offshore platform steel with yield strength of 550 Mpa and production method thereof | |
| CN109957728A (en) | A kind of 800MPa grades of fastener weather-proof the cold heading steel and its production method | |
| JP2011504549A (en) | Deep drawing high strength steel and manufacturing method thereof | |
| CN108203786B (en) | Silicon solid solution high-strength plastic ferrite nodular cast iron, manufacturing method and railway locomotive part | |
| WO2019029533A1 (en) | Cast steel, preparation method for cast steel and use of cast steel | |
| CN103952635B (en) | High-strength steel of manganese and silicon containing and preparation method thereof | |
| CN104213022A (en) | Agitation tank steel with tensile strength of 650 MPa grade and production method thereof | |
| CN104099515B (en) | A kind of steel, its heat treatment steel formed and manufacture method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 161041, No. 7, red shore street, Fulaerji District, Heilongjiang, Qigihar Patentee after: Jianlong Beiman Special Steel Co. Ltd. Address before: 161041, No. 7, red shore street, Fulaerji District, Heilongjiang, Qigihar Patentee before: DONGBEI SPECIAL STEEL GROUP BEIMAN SPECIAL STEEL CO., LTD. |