CN105986200A - Novel non-quenched and tempered steel - Google Patents
Novel non-quenched and tempered steel Download PDFInfo
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- CN105986200A CN105986200A CN201510049328.7A CN201510049328A CN105986200A CN 105986200 A CN105986200 A CN 105986200A CN 201510049328 A CN201510049328 A CN 201510049328A CN 105986200 A CN105986200 A CN 105986200A
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Abstract
The invention relates to a novel non-quenched and tempered steel. The novel non-quenched and tempered steel comprises the following chemical components by weight: 0.8 to 2.5% of C, 0.15 to 2% of Si, 1.5 to 2.5% of Mn, 0.4 to 1.3% of Cr, 0.18 to 0.27% of Mo, 0.04 to 0.1% of V, 0.012 to 0.045% of Ti, less than 0.05% of S, no more than 0.01% of P and no more than 0.015% of N, with the balance being Fe. In the aspects of chemical composition and formula, the novel non-quenched and tempered steel, on the basis of utilization of alloyage elements like manganese and chromium, reduces carbon content of steel, adds a small amount of molybdenum and micro-alloying elements and does not need addition of expensive nickel and boron with difficultly controllable components.
Description
Technical field
The present invention relates to a kind of New Type Non-Quenched-Tempered Steels.
Background technology
Fast development recently as automobile industry, being growing more intense of its market competition, requirement to vehicle structure part is more and more higher, and traditional quenched and tempered state structure material has that complex process, energy consumption be high and the drawback such as heat treating fault, therefore non-tempering process becomes the important breakthrough mouth improving automobile market competitiveness in automobile use on structural member produces.
Under this background, the research and development of high-strength tenacity non-hardened and tempered steel the most increasingly receives significant attention, and the most in succession have been achieved for certain achievement, picture China's publication CN1058997 " Unhardened and untempered low carbon steel with high strength and toughness " reports the yield strength after this steel air cooling 300～650 DEG C of tempering and tensile strength can respectively reach 660～810MPa, 700～1000MPa；And China Patent Publication No. CN1472358 " a kind of non-tempered superhigh carbon steel and production technology thereof " reports employing injection molding and isothermal forging process, the yield strength of steel and tensile strength can reach 850～910MPa respectively, 1150～1220MPa, elongation percentage is within the scope of 9.5～11%；Additionally, China Patent Publication No. CN1861831 " the high-strength non-hardened and non-tempered steel of 1100MPa level and production method thereof " reports the level that the intensity of this steel can reach suitable with China Patent Publication No. CN1472358 " a kind of high-carbon steel and production technology thereof ", and elongation percentage has reached 10～12%, and have employed external refining and cold rolling technique.
Summary of the invention
It is an object of the invention to provide and develop a kind of non-hardened and tempered steel steel grade.
The purpose of the present invention is achieved through the following technical solutions:
A kind of New Type Non-Quenched-Tempered Steels, it has following chemical composition and percentage by weight thereof: C
0. 8～2.5%, Si 0.15～2%, Mn 1.5～2.5%, Cr 0.4～1.3%, Mo 0.18～0.27%, V 0.04～0.1%, Ti
0.012～0.045%, S ＜ 0.05%, P≤0.01%, N≤0.015%, Fe surplus.
The preparation method of a kind of New Type Non-Quenched-Tempered Steels, has following technical process and a step:
First by above-mentioned non-hardened and tempered steel steel material component prescription weighing and burden, then use traditional method of smelting, steel material is carried out melting；
B. by gained steel ingot or blank heating to 1200～1400 DEG C, and it is incubated the sufficiently long time；Forging or rolling is started so that it is deformation ratio is more than 4, and finish-forging or finishing temperature are 900～970 DEG C, and forging rolling becomes the rod iron of certain diameter size when 1000～1050 DEG C；
C. above-mentioned rod iron is carried out conventional air cooling, after being cooled to room temperature, then carries out the lonneal of 1.5 hours at a temperature of 180 DEG C；Finally i.e. obtain high-strength tenacity tempered.
The features and advantages of the invention are as described below:
(1) chemical composition of the non-hardened and tempered steel of the present invention and formula aspect, on the basis of utilizing the alloy element such as manganese, chromium, reduce the carbon content of steel, add a small amount of molybdenum, add micro alloying element, it is not necessary to add expensive nickel and the unmanageable boron of composition.
(2) in the widest cooled velocity band, good obdurability can still can be obtained after forging or rolling, it is not necessary to special refine and controlled rolling and controlled cooling skill.
(3) lonneal of 1.5 hours at a temperature of final stage uses 180 DEG C, can make its mechanical property be further enhanced.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
In this practicality example, chemical composition and the percentage by weight thereof of non-hardened and tempered steel are as follows:
C 0.16%, Si 0.18%, Mn 2.2%, Cr 0.9%, V 0.08%, Ti 0.04%, Mo 0.25%, S ＜ 0.05%, P 0.005%, Fe surplus.
The preparation method of tempered, its process and step are as follows:
(1) first by above-mentioned non-hardened and tempered steel steel material component prescription weighing and burden, then use traditional method of smelting, steel material is carried out melting；
(2) by the blank heating of gained to 1250 DEG C, after being incubated 3.5 hours, starting rolling at 1000 DEG C, its deformation ratio is 4～4.5, and finishing temperature is 950 DEG C, rolls respectively and causes φ 90mm and the rod iron of two kinds of sizes of φ 500mm, and carries out conventional air cooling；
(3) after being cooled to room temperature, then the lonneal of 1.5 hours at a temperature of 180 DEG C is carried out；Finally i.e. obtain high-strength tenacity tempered.
Embodiment 2
In this practicality example, chemical composition and the percentage by weight thereof of non-hardened and tempered steel are as follows:
C 0.2%, Si 0.55%, Mn 2%, Cr1.2%, V0.07%, Ti 0.035%, Mo 0.26%, S ＜ 0.001%, P 0.007%, Fe surplus.
The preparation method of tempered, its process and step are as follows:
(1) first by above-mentioned non-hardened and tempered steel steel material component prescription weighing and burden, then use traditional method of smelting, steel material is carried out melting；
(2) by the blank heating of gained to 1300 DEG C, after being incubated 3.5 hours, starting rolling at 1050 DEG C, its deformation ratio is 4～4.5, and finishing temperature is 970 DEG C, rolls respectively and causes φ 90mm and the rod iron of two kinds of sizes of φ 500mm, and carries out conventional air cooling；
(3) after being cooled to room temperature, then the lonneal of 1.5 hours at a temperature of 180 DEG C is carried out；Finally i.e. obtain high-strength tenacity tempered.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should be in the protection domain being defined in the patent claims the most on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a New Type Non-Quenched-Tempered Steels, it is characterised in that it has following chemical composition and percentage by weight thereof: C
0. 8～2.5%, Si 0.15～2%, Mn 1.5～2.5%, Cr 0.4～1.3%, Mo 0.18～0.27%, V 0.04～0.1%, Ti 0.012～0.045%, S ＜ 0.05%, P≤0.01%, N≤0.015%, Fe surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049328.7A CN105986200A (en) | 2015-01-31 | 2015-01-31 | Novel non-quenched and tempered steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049328.7A CN105986200A (en) | 2015-01-31 | 2015-01-31 | Novel non-quenched and tempered steel |
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| CN105986200A true CN105986200A (en) | 2016-10-05 |
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| CN201510049328.7A Pending CN105986200A (en) | 2015-01-31 | 2015-01-31 | Novel non-quenched and tempered steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834962A (en) * | 2017-03-29 | 2017-06-13 | 沈阳工业大学 | A kind of strong high-carbon low-alloy steel of superelevation and its shaping and heat-treatment technology method |
| CN109112427A (en) * | 2017-06-26 | 2019-01-01 | 宝山钢铁股份有限公司 | A kind of high-strength and high ductility Micro Alloying steel tubes for drilling and its manufacturing method |
-
2015
- 2015-01-31 CN CN201510049328.7A patent/CN105986200A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834962A (en) * | 2017-03-29 | 2017-06-13 | 沈阳工业大学 | A kind of strong high-carbon low-alloy steel of superelevation and its shaping and heat-treatment technology method |
| CN106834962B (en) * | 2017-03-29 | 2018-07-06 | 沈阳工业大学 | A kind of strong high-carbon low-alloy steel of superelevation and its forming and heat-treatment technology method |
| CN109112427A (en) * | 2017-06-26 | 2019-01-01 | 宝山钢铁股份有限公司 | A kind of high-strength and high ductility Micro Alloying steel tubes for drilling and its manufacturing method |
| CN109112427B (en) * | 2017-06-26 | 2021-05-14 | 宝山钢铁股份有限公司 | High-strength high-toughness non-quenched and tempered steel pipe for geological drilling and manufacturing method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |
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| WD01 | Invention patent application deemed withdrawn after publication |