CN1288971A - Heterogeneous low-carbon air-cooled granular bainite/crystalloid ferrite steel - Google Patents
Heterogeneous low-carbon air-cooled granular bainite/crystalloid ferrite steel Download PDFInfo
- Publication number
- CN1288971A CN1288971A CN 00124468 CN00124468A CN1288971A CN 1288971 A CN1288971 A CN 1288971A CN 00124468 CN00124468 CN 00124468 CN 00124468 A CN00124468 A CN 00124468A CN 1288971 A CN1288971 A CN 1288971A
- Authority
- CN
- China
- Prior art keywords
- equal
- steel
- sigma
- mpa
- 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.)
- Granted
Links
Abstract
The present invention belongs to the field of alloy steel design technology, its composition is formed from (wt%) C 0.06-0.15 wt%, Mn 1.90-2.60 wt% and Si 0,60-1.50 wt% as main alloy elements, the rest is Fe, besides, one or more than two kinds of the following elements of Cr 0-2.1 wt%, V less than or equal to 0.15 wt%, Al less than or equal to 0.15 wt%, Ti less than or equal to 0.10 wt% and B less than or equal to 0.040 wt%. also can be edded. Under the conditions of no Ni and Mo elements secondary steelmaking process, controlling rolling and controlling cooling and heat treatment, and when said steel is used for producing steel bar with large cross section, sigma b is greater than or equal to 820 MPa, sigma 0.2 is greater than or equal to 500 MPa and delta 5 is greater than or equal to 17%; and for producing hot-rolled medium plate, sigma b is greater than or equal to 850 MPa, sigma 0.2 is greater than or equal to 520 MPa, delta 5 is greater than or equal to 17% and A ky is greater than or equal to 40J. Said steel can be used as low-alloy wear-resistant components, etc.
Description
The invention belongs to the steel alloy design field, particularly a kind of new low-carbon and low-alloy high-strength steel.
In the good high-strength low-alloy steel of welding property, most of steel grades adopt in the approach such as heat-treat after noble metal element, (2) external refining, (3) controlled rolling and controlled cooling, (4) cold and hot workings such as (1) Ni, Mo one or more to guarantee that its better strength and toughness cooperates, make that the production cost of high-strength low-alloy steel is higher, be difficult for large-scale popularization and use.
The objective of the invention is for overcoming the weak point of prior art, develop a kind of Di Tankonglenglizhuanbeishi body/grain boundary allotriomorphic ferrite heterogeneous structure high-strength low-alloy steel kind.Among the present invention, the grain boundary allotriomorphic ferrite of continuous distribution is not on good terms as a kind of toughness and is significantly improved the plasticity and toughness of granular bainite tissue, do not utilizing under precious metal alloys element, external refining, controlled rolling and controlled cooling and the heat treated condition, obtain the high-intensity while after making this steel hot-work, also have higher plasticity and toughness and good weldability, be convenient to direct use.
The present invention adopts C, Mn, Si as main alloy element, can add one or more of Cr, V, Al, Ti, B element, and all the other are Fe, and its chemical ingredients can be:
1, C:0.06-0.15wt%; Mn:1.90-2.60wt%; Si:0.60-1.50wt%; The following column element that adds one or more: Cr:0-2.0wt%; V≤0.15wt%; Al≤0.25wt%; Ti≤0.10wt%; B≤0.0040wt%, surplus is Fe.
2, by different purposes, the preferable composition of this steel grade can be:
(1) C:0.06-0.12wt%; Mn:1.90-2.40wt%Si:0.70-1.10wt%; All the other elemental range are the same.
(2) C:0.07-0.14wt%; Mn:1.90-2.30wt%; Si:0.90-1.50wt%; All the other elemental range are the same.
(3) C:0.09-0.15wt%; Mn:2.40-2.60wt%; Si:0.60-1.00wt%; All the other elemental range are the same.
The production technique of steel grade of the present invention is: a kind of process for making routinely that available converter, electric arc furnace, medium-frequency induction furnace are three kinds is smelted, annotate material base that ingot or continuous casting produce can first slow cooling after reheat, also directly be incubated about hot delivery and hot charging post-heating to 1200 ℃, forging and pressing or the rolling back air cooling slow cooling to the lower temperature range of becoming a useful person, can obtain grain boundary allotriomorphic ferrite/granular bainite heterogeneous structure, realize that good intensity cooperates with plasticity and toughness.
This novel low carbon Hi-Stren steel of the present invention, its tissue signature is the grain boundary allotriomorphic ferrite of discontinuous distribution and the heterogeneous structure that granular bainite constitutes.This steel forms a certain amount of discontinuous form grain boundary allotriomorphic ferrite earlier in the process air cooler after hot-work, because the acting in conjunction of an amount of alloying element Mn and obstruction carbide forming element Si, perlitic transformation does not take place in supercooled austenite, but form granular bainite at a lower temperature, obtain the good granular bainite of combination of strength and toughness/grain boundary allotriomorphic ferrite heterogeneous structure.Compare with other steel grade with intensity rank, the plasticity and toughness of this steel can be good, and welding property is good, and production technique is simple, with low cost.
The utilization of steel grade of the present invention: this steel can directly be used without modifier treatment at hot-work (forge or roll) back air cooling, use also temperable back, can be used as the low-alloy abrasion-proof spare on high strength cast iron, high tensile steel plate, the engineering machinery, can be used as joist steel, channel-section steel, angle steel, H shaped steel, the similar performance quenched and tempered steel that can also replace machinofacture department to use.
Embodiment
The various embodiments of steel grade of the present invention sees the following form:
As can be seen, this complex phase steel in the mentioned component scope has higher combination of strength and toughness, σ when being used for production large section reinforcing bar
b〉=820MPa, σ
0.2〉=500MPa, δ
5〉=17%; σ when being used to produce hot-rolled steel sheet
b〉=850MPa, σ
0.2〉=520MPa, δ
5〉=17%, A
KV〉=40J.
Claims (4)
1, a kind of Di Tankonglenglizhuanbeishi body/grain boundary allotriomorphic ferrite complex phase steel, it is characterized in that, adopt C, Mn, Si as main alloy element, add one or more of Cr, V, Al, Ti, B element again, all the other are Fe, obtain the heterogeneous structure that grain boundary allotriomorphic ferrite and granular bainite by discontinuous form constitute in process air cooler, its proportioning component is: C:0.06-0.15wt%; Mn:1.90-2.60wt%; Si:0.60-1.50wt%; Cr:0-2.0wt%, V≤0.15wt%; Al≤0.25wt%; Ti≤0.10wt%; B≤0.0040wt%, surplus is Fe.
2, by the described Di Tankonglenglizhuanbeishi body of claim 1/grain boundary allotriomorphic ferrite complex phase steel, it is characterized in that said main alloy element C, Mn, its proportioning component of Si are:
C：0.06-0.12wt％；Mn：1.90-2.40wt％；Si：0.70-1.10wt％。
3, by the described Di Tankonglenglizhuanbeishi body of claim 1/grain boundary allotriomorphic ferrite complex phase steel, it is characterized in that said main alloy element C, Mn, its proportioning component of Si are:
C：0.07-0.14wt％；Mn：1.90-2.30wt％；Si：0.90-1.50wt％。
4, by the described Di Tankonglenglizhuanbeishi body of claim 1/grain boundary allotriomorphic ferrite complex phase steel, it is characterized in that said main alloy element C, Mn, its proportioning component of Si are:
C：0.09-0.15wt％；Mn：2.40-2.60wt％；Si：0.60-1.00wt％。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124468 CN1113975C (en) | 2000-09-08 | 2000-09-08 | Heterogeneous low-carbon air-cooled granular bainite/crystalloid ferrite steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124468 CN1113975C (en) | 2000-09-08 | 2000-09-08 | Heterogeneous low-carbon air-cooled granular bainite/crystalloid ferrite steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1288971A true CN1288971A (en) | 2001-03-28 |
| CN1113975C CN1113975C (en) | 2003-07-09 |
Family
ID=4590443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00124468 Expired - Fee Related CN1113975C (en) | 2000-09-08 | 2000-09-08 | Heterogeneous low-carbon air-cooled granular bainite/crystalloid ferrite steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1113975C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415925C (en) * | 2004-11-05 | 2008-09-03 | 马鞍山钢铁股份有限公司 | Steel for high strength shock-proof hot-rolled steel bar |
| CN101988172A (en) * | 2010-11-23 | 2011-03-23 | 白秉哲 | High-strength shock-resistance steel bars and production method thereof |
| CN103710624A (en) * | 2013-12-20 | 2014-04-09 | 钢铁研究总院 | Low alloy steel used for grounding grid resistant to acid soil corrosion |
| CN109913748A (en) * | 2019-02-13 | 2019-06-21 | 唐山不锈钢有限责任公司 | A kind of low cost hot rolling Multiphase Steel HR900CP and its production method |
| CN114645191A (en) * | 2022-02-11 | 2022-06-21 | 柳州钢铁股份有限公司 | Low-cost high-toughness high-weldability high-strength ship board and preparation method thereof |
-
2000
- 2000-09-08 CN CN 00124468 patent/CN1113975C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415925C (en) * | 2004-11-05 | 2008-09-03 | 马鞍山钢铁股份有限公司 | Steel for high strength shock-proof hot-rolled steel bar |
| CN101988172A (en) * | 2010-11-23 | 2011-03-23 | 白秉哲 | High-strength shock-resistance steel bars and production method thereof |
| CN101988172B (en) * | 2010-11-23 | 2012-07-04 | 白秉哲 | High-strength shock-resistance steel bars and production method thereof |
| CN103710624A (en) * | 2013-12-20 | 2014-04-09 | 钢铁研究总院 | Low alloy steel used for grounding grid resistant to acid soil corrosion |
| CN109913748A (en) * | 2019-02-13 | 2019-06-21 | 唐山不锈钢有限责任公司 | A kind of low cost hot rolling Multiphase Steel HR900CP and its production method |
| CN114645191A (en) * | 2022-02-11 | 2022-06-21 | 柳州钢铁股份有限公司 | Low-cost high-toughness high-weldability high-strength ship board and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1113975C (en) | 2003-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109023112B (en) | High-strength atmospheric corrosion resistant cold forging steel and preparation method thereof | |
| CN101451212B (en) | High intensity steel plate and preparation method thereof | |
| CN100436633C (en) | Low carbon high alloy steel for ball mill lining and its making process | |
| CN104032229B (en) | Hardware & tools special-purpose steel and preparation method thereof | |
| CN102383066B (en) | Abrasion resistant cast steel and preparation method thereof | |
| CN101948987B (en) | Manufacturing method of high-strength and high-toughness steel plate | |
| CN104328356A (en) | Manufacturing method of thin-specification high-strength-structure steel plate with steckel mill | |
| CN110846586B (en) | Steel for high-strength high-toughness high-wear-resistance steel ball and preparation method thereof | |
| CN101451220A (en) | High-strength abrasion-proof steel plate and method for producing the same | |
| CN109881089B (en) | High-strength wear-resistant steel and preparation method thereof | |
| CN101638749A (en) | Automobile steel with low cost and high strength ductility balance and preparation method thereof | |
| CN102732787A (en) | 600MPa level quake-proof twisted steel and manufacturing method thereof | |
| CN101451219A (en) | High intensity wear-resistant steel plate and preparation method thereof | |
| CN102691005B (en) | Low alloy die steel | |
| CN108998725A (en) | Track link rail 35MnBM steel and preparation method thereof | |
| CN109234635A (en) | A kind of 345MPa grades of low yield ratio weathering resistant steel and preparation method thereof | |
| CN109207849A (en) | High-strength high-plasticity 1000MPa level hot rolled steel plate and preparation method | |
| CN106868420A (en) | One kind forging superhigh intensity low-alloy wear-resistant steel and preparation method thereof | |
| CN111349858B (en) | Fine-grained steel for track link of engineering machinery crawler and preparation method thereof | |
| CN104294184B (en) | Mn-Si-B Austria shellfish abrasion resistant cast steel and preparation method thereof | |
| CN111500920A (en) | HRB600 high-strength anti-seismic deformed steel bar and production method thereof | |
| CN101451221A (en) | High-strength steel plate and method for producing the same | |
| CN100449027C (en) | High strength abrasion resistant steel and method for producing the same | |
| CN1194113C (en) | Mn-Si-Cr air-cooled granular bainite/ferrite polyphase Steel | |
| CN105463302B (en) | A kind of preparation method of high rigidity spheroidal graphite cast-iron tup |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030709 Termination date: 20110908 |