CN103911549A - V-N microalloyed high-toughness large-specification steel angle and production method thereof - Google Patents
V-N microalloyed high-toughness large-specification steel angle and production method thereof Download PDFInfo
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Abstract
The invention relates to a V-N microalloyed high-toughness large-specification steel angle and a production method thereof. The V-N microalloyed high-toughness large-specification steel angle is composed of the following chemical components in percentage by weight: 0.14-0.20% of C, 0.20-0.50% of Si, 1.30-1.55% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.009-0.016% of N, 0.06-0.10% of V, 0.015-0.030% of Als and the balance of Fe. According to the formula of the chemical components and in a large-scale profile steel production line, the crystalline grains are thinned by controlling the parameters of continuous casting and rolling processes, and a cementite in a pearlite is distributed in a form of granules or in a short-rod form by use of a rapid controlled cooling process, and fine vanadium carbonitride or vanadium oxide particles are scattered and distributed on a ferrite substrate, and therefore, the purpose of improving the strength and the low-temperature toughness of the large-specification steel angle is reached; the mechanical property indexes of the V-N microalloyed high-toughness large-specification steel angle meet the standard requirements of Q460E.
Description
Technical field
The present invention relates to the tough large specification angle steel of a kind of V-N micro-alloyed high strength and production method thereof, belong to hot-rolled steel section technical field.
Background technology
Angle steel is widely used in steel construction, and large specification angle steel is mainly used in steel tower manufacture and building structure.Current, China's electric power energy ultra-high voltage, extra-high voltage delivery conduit construction project are flourish, needs to the year two thousand twenty for satisfied " national network, transferring electricity from the west to the east, north and south supply mutually ", to build multiple 1,000,000 grades of UHV transmission line major paths in North and South direction, 12 planning propose the extra-high-speed pressure network construction investment of " three vertical three horizontal looped networks " up to 2,700 hundred million yuan.Nearly ten years, the demand of China's electric power was increasing with 10%～15% speed every year, and this is all for electric power tower provides wide market outlook with angle steel.
Meet a large amount of multi-loop lines, extreme high voltage and heavy cross section conducting line, must develop the maximization of electric tower structure, the load of design on electric tower is also by increasing, and this just needs large specification, high-strength corner iron to meet the demand in the design of electric power tower steel angle structure.
At present domestic mainly using No. 20 following Q235, Q345 and Q390 hot-rolled angle steel as electric power tower angle steel, have that electric power tower angle steel gauge thickness is less than normal, intensity and the problem such as quality grade is on the low side, while making to build UHV transmission steel tower, have to adopt Two bors d's oeuveres or the combination angle steel of spelling, series of problems such as bringing angle steel unbalance stress destructible, bolt connection construction difficulty, install fill plate safe differential additional, processing installation costs is large more.For this reason, transmission line construction has proposed to use the requirement of large specification, large thickness, high strength, high-grade angle steel, to replace the use of the common combination angle steel of small dimension.
In addition, the electric power tower that China is used is at present generally A level and B level by angle steel quality grade, so fracture accident easily occurs under the condition of low temperature and bad weather with angle steel electric power tower.And the north of China and remote mountain areas climate change are abnormal severe, the service condition of angle steel is required to more and more harshness, for the security of guarantee equipment operation, require more and more higher to its low-temperature impact toughness.Therefore in the urgent need to developing large specification, high strength and low-temperature impact-resistant angle steel, to meet the demand of national grid construction.
Summary of the invention
The present invention is intended to overcome the defect of prior art, and provide the tough large specification angle steel of a kind of V-N micro-alloyed high strength and production method thereof, by optimizing composition and production method, obtain ultra-fine grained ferrite and add particulate state or corynebacterium pearlitic structure, and the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, improved intensity and the toughness of steel, and then the common combination angle steel of alternative small dimension and obdurability mate bad angle steel.
The present invention solves the problems of the technologies described above adopted technical scheme:
The tough large specification angle steel of a kind of V-N micro-alloyed high strength, it is characterized in that, chemical composition is as follows according to weight percent proportioning: C:0.14～0.20%, Si:0.20～0.50%, Mn:1.30～1.55%, P :≤0.020%, S :≤0.010%, N:0.009～0.016%, V:0.06～0.10%, Als:0.015～0.030%, surplus Fe.
Further, the tough large specification angle steel of above-mentioned V-N micro-alloyed high strength, chemical composition proportion optimization is as follows: C:0.14～0.18%, Si:0.30～0.45%, Mn:1.35～1.55%, P :≤0.020%, S :≤0.010%, N:0.010～0.016%, V:0.07～0.09%, Als:0.020～0.026%, surplus Fe.
Further, the tough large specification angle steel of above-mentioned V-N micro-alloyed high strength, mechanical property technical indicator is as follows:
Tensile strength: R
m>=620MPa,
Yield strength: R
el>=485MPa,
Elongation: A >=20%,
Impelling strength: Akv >=20J(test temperature-40 DEG C).
A production method for the tough large specification angle steel of V-N micro-alloyed high strength, comprises continuous casting working procedure, rolling process, refrigerating work procedure, and the process parameter control of described continuous casting working procedure is as follows:
The slide gate nozzle of molten steel by ladle bottom injects tundish, opens to water and in the first bag, wraps temperature and be controlled at 1545～1552 DEG C, and Casting speed is 0.85～1.5m/min, and the strand that goes out crystallizer is of a size of 250*360*7750 mm;
The process parameter control of described rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1265～1275 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1050～1060 DEG C, the finishing temperature of finishing mill is 820～850 DEG C, and single pass draft is greater than 20%;
The process parameter control of described refrigerating work procedure is as follows: roll and first adopt atomization cooling afterwards, make angle steel be cooled to evenly and rapidly 680～720 DEG C to be greater than the cooling rate of 25 DEG C/s, be then cooled to 450 DEG C with the cooling rate of 0.02～2 DEG C/s, then air cooling is to room temperature.
Further, the production method of the tough large specification angle steel of above-mentioned V-N micro-alloyed high strength, the final room temperature texture of its hot-rolled angle steel is ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, ferrite grain size is 3～4 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size is 2～20nm.
Adopt the present invention of technique scheme, compared with prior art, its outstanding effect is:
1. the chemical composition formula of the tough large specification angle steel of V-N micro-alloyed high strength of optimizing is provided.
2. roll the obdurability that rear rapid cooling has improved steel, its reason is as follows: (I) reduced austenite to ferritic transition temperature, increased the motivating force of phase transformation.(II) is owing to adopting the cooling control technology of rapid cooling after finish to gauge, make its softening time shorten of metal generation Recovery and recrystallization in DEG C temperature range of finishing temperature to 680～720, thereby reduce the release of deformation storage energy, also increased accordingly the motivating force of phase transformation, thereby made the ferrite and pearlite after phase transformation fined.(III), in vanadium nitrogen soft steel, more than 750 DEG C separated out as main taking VN, is that V (CN) separates out substantially lower than 750 DEG C.Roll rear rapid cooling and reduce as much as possible separating out of VN in process of cooling, to increase the amount of separating out of V (CN) in slow cooling process subsequently.Because temperature is lower, the size of precipitate is less, larger to the highly malleablized effect of steel.(IV), due to after rolling faster under cooling rate, C has little time diffusion, has retained the state in subregion enrichment, causes the concentration gradient of C.The concentration gradient of C is as the motivating force of its diffusion, and this also can be conducive to the diffusion of carbon in slow cooling nodularization process subsequently, accelerates the nodularization process of cementite.
3. show through Performance Detection, the tough large specification angle steel of V-N micro-alloyed high strength of producing according to stoicheiometry of the present invention and processing parameter, its mechanical performance index can reach the standard-required of Q460E completely, and property indices is all better than currently available products, and product has good low-temperature impact toughness.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and object is only better to understand content of the present invention.Therefore, the cited case not limits the scope of the invention.
The concrete steps of the tough large specification angle steel production method of V-N micro-alloyed high strength are:
Hot metal pretreatment → converter smelting → external refining → continuous casting → heating → hot rolling → cooling.
After converter smelting, external refining, continuous casting, the chemical composition of rectangular bloom is: C:0.14～0.20%, Si:0.20～0.50%, Mn:1.30～1.55%, P :≤0.020%, S :≤0.010%, N:0.009～0.016%, V:0.06～0.10%, Als:0.015～0.030%, surplus Fe and inevitable impurity.
After being heated to 1265～1275 DEG C of insulations in process furnace, continuous casting gained rectangular bloom carries out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1050～1060 DEG C, the finishing temperature of finishing mill is 820～850 DEG C, single pass draft is greater than 20%, roll and first adopt atomization cooling afterwards, make angle steel be cooled to evenly and rapidly 680～720 DEG C to be greater than the cooling rate of 25 DEG C/s, and then be cooled to 450 DEG C with the cooling rate of 0.02～2 DEG C/s, last air cooling is to room temperature.
Following table is the chemical composition proportioning of weight percent according to quantity of specific embodiment:
The tough large specification angle steel of V-N micro-alloyed high strength described in each embodiment, smelts according to above-mentioned chemical composition proportioning above, through techniques such as hot metal pretreatment, converter smelting, external refining, continuous casting protective castings, enters rolling process.
In embodiment 1, the process parameter control of rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1265 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1050 DEG C, the finishing temperature of finishing mill is 820 DEG C, single pass draft is greater than 20%, rolls first to adopt atomization cooling afterwards, makes angle steel be cooled to evenly and rapidly 680 DEG C with the cooling rate of 28 DEG C/s, then be cooled to 450 DEG C with the cooling rate of 0.05 DEG C/s, then air cooling is to room temperature.Produce by above-mentioned processing parameter, the finished product are organized as ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3.4 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size average out to 9nm.
In embodiment 2, the process parameter control of rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1275 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1060 DEG C, the finishing temperature of finishing mill is 850 DEG C, single pass draft is greater than 20%, rolls first to adopt atomization cooling afterwards, makes angle steel be cooled to evenly and rapidly 720 DEG C with the cooling rate of 26 DEG C/s, then be cooled to 450 DEG C with the cooling rate of 2 DEG C/s, then air cooling is to room temperature.Produce by above-mentioned processing parameter, the finished product are organized as ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size average out to 2 nm.
In embodiment 3, the process parameter control of rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1269 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1057 DEG C, the finishing temperature of finishing mill is 828 DEG C, single pass draft is greater than 20%, rolls first to adopt atomization cooling afterwards, makes angle steel be cooled to evenly and rapidly 687 DEG C with the cooling rate of 32 DEG C/s, then be cooled to 450 DEG C with the cooling rate of 1 DEG C/s, then air cooling is to room temperature.Produce by above-mentioned processing parameter, the finished product are organized as ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3.1 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size average out to 3.6nm.
In embodiment 4, the process parameter control of rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1270 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1055 DEG C, the finishing temperature of finishing mill is 845 DEG C, single pass draft is greater than 20%, rolls first to adopt atomization cooling afterwards, makes angle steel be cooled to evenly and rapidly 700 DEG C with the cooling rate of 30 DEG C/s, then be cooled to 450 DEG C with the cooling rate of 0.03 DEG C/s, then air cooling is to room temperature.Produce by above-mentioned processing parameter, the finished product are organized as ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3.5 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size average out to 5nm.
In embodiment 5, the process parameter control of rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1272 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1054 DEG C, the finishing temperature of finishing mill is 826 DEG C, single pass draft is greater than 20%, rolls first to adopt atomization cooling afterwards, makes angle steel be cooled to evenly and rapidly 690 DEG C with the cooling rate of 27 DEG C/s, then be cooled to 450 DEG C with the cooling rate of 0.025 DEG C/s, then air cooling is to room temperature.Produce by above-mentioned processing parameter, the finished product are organized as ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3.7 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size average out to 11nm.
In embodiment 6, the process parameter control of rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1271 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1057 DEG C, the finishing temperature of finishing mill is 840 DEG C, single pass draft is greater than 20%, rolls first to adopt atomization cooling afterwards, makes angle steel be cooled to evenly and rapidly 702 DEG C with the cooling rate of 34 DEG C/s, then be cooled to 450 DEG C with the cooling rate of 0.04 DEG C/s, then air cooling is to room temperature.Produce by above-mentioned processing parameter, the finished product are organized as ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3.4 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size average out to 5.4nm.
In embodiment 7, the process parameter control of rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1268 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1056 DEG C, the finishing temperature of finishing mill is 830 DEG C, single pass draft is greater than 20%, rolls first to adopt atomization cooling afterwards, makes angle steel be cooled to evenly and rapidly 685 DEG C to be greater than the cooling rate of 35 DEG C/s, then be cooled to 450 DEG C with the cooling rate of 0.06 DEG C/s, then air cooling is to room temperature.Produce by above-mentioned processing parameter, the finished product are organized as ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3.2 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size average out to 13nm.
The tough large specification angle steel of V-N micro-alloyed high strength being obtained by above-described embodiment, its mechanical property technical indicator is:
Tensile strength: Rm >=620MPa,
Yield strength: Rel >=485MPa,
Elongation: A >=20%,
Impelling strength: Akv >=20J(test temperature-40 DEG C).
Claims (5)
1. the tough large specification angle steel of V-N micro-alloyed high strength, it is characterized in that, chemical composition is as follows according to weight percent proportioning: C:0.14～0.20%, Si:0.20～0.50%, Mn:1.30～1.55%, P :≤0.020%, S :≤0.010%, N:0.009～0.016%, V:0.06～0.10%, Als:0.015～0.030%, surplus Fe.
2. the tough large specification angle steel of V-N micro-alloyed high strength according to claim 1, it is characterized in that, chemical composition is as follows according to weight percent proportioning: C:0.14～0.18%, Si:0.30～0.45%, Mn:1.35～1.55%, P :≤0.020%, S :≤0.010%, N:0.010～0.016%, V:0.07～0.09%, Als:0.020～0.026%, surplus Fe.
3. the tough large specification angle steel of V-N micro-alloyed high strength according to claim 1, is characterized in that, mechanical property technical indicator is as follows:
Tensile strength: R
m>=620MPa;
Yield strength: R
el>=485MPa;
Elongation: A >=20%;
Impelling strength: Akv >=20J(test temperature-40 DEG C).
4. the production method of the tough large specification angle steel of V-N micro-alloyed high strength as claimed in claim 1 or 2, comprises continuous casting working procedure, rolling process, refrigerating work procedure, it is characterized in that:
The process parameter control of described continuous casting working procedure is as follows: molten steel injects tundish by the slide gate nozzle of ladle bottom, open to water and in the first bag, wrap temperature and be controlled at 1545～1552 DEG C, Casting speed is 0.85～1.5m/min, and the strand that goes out crystallizer is of a size of 250*360*7750 mm;
The process parameter control of described rolling process is as follows: after continuous casting gained rectangular bloom is heated to 1265～1275 DEG C of insulations in process furnace, carry out roughing and finish rolling, the start rolling temperature of roughing mill is controlled at 1050～1060 DEG C, the finishing temperature of finishing mill is 820～850 DEG C, and single pass draft is greater than 20%;
The process parameter control of described refrigerating work procedure is as follows: roll and first adopt atomization cooling afterwards, make angle steel be cooled to evenly and rapidly 680～720 DEG C to be greater than the cooling rate of 25 DEG C/s, and then be cooled to 450 DEG C with the cooling rate of 0.02～2 DEG C/s, last air cooling is to room temperature.
5. the production method of the tough large specification angle steel of V-N micro-alloyed high strength according to claim 4, is characterized in that, the final room temperature texture of its hot-rolled angle steel is ultra-fine ferrite+particulate state or corynebacterium pearlitic structure, and ferrite grain size is 3～4 μ m; And the carbon vanadium nitride that disperse is distributing tiny on ferrite matrix or vanadium nitride particle, particle size is 2～20nm.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104907513A (en) * | 2015-06-09 | 2015-09-16 | 石家庄钢铁有限责任公司 | Method for continuous casting of large rectangular billet of low-carbon hadifield steel |
| CN106521125A (en) * | 2016-12-20 | 2017-03-22 | 东北大学 | Method for improving strength by ultrarapid cooling of angle steel after rolling |
| CN109023123A (en) * | 2018-10-12 | 2018-12-18 | 石横特钢集团有限公司 | A kind of production method of 840MPa grades of hot rolling anchor pole reinforcing bar |
| CN111636030A (en) * | 2020-05-29 | 2020-09-08 | 南京钢铁股份有限公司 | Q420C-grade hot-rolled angle steel and preparation method thereof based on machine learning |
| CN114411052A (en) * | 2021-12-24 | 2022-04-29 | 中联先进钢铁材料技术有限责任公司 | V-N microalloyed steel plate with low cost and high strength and toughness and preparation method thereof |
| CN114807768A (en) * | 2022-05-16 | 2022-07-29 | 承德建龙特殊钢有限公司 | Q420 low-alloy high-strength structural steel and production method thereof |
| WO2022214107A1 (en) * | 2021-05-12 | 2022-10-13 | 大冶特殊钢有限公司 | Method for rolling high-toughness high-strength low-alloy steel |
| CN115976418A (en) * | 2023-02-23 | 2023-04-18 | 山西建龙实业有限公司 | Non-quenched and tempered GF20Mn2V steel for high-strength bolt and preparation method thereof |
| CN116200672A (en) * | 2022-11-25 | 2023-06-02 | 重庆钢铁股份有限公司 | Low-cost high-strength structural steel plate Q460D and manufacturing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62227031A (en) * | 1986-03-28 | 1987-10-06 | Kobe Steel Ltd | Manufacture of fine grain steel |
| JPH04131323A (en) * | 1990-09-21 | 1992-05-06 | Kobe Steel Ltd | Production of heat treatment saving type high tensile steel wire having excellent fatigue resistance and wear resistance |
| CN101509097A (en) * | 2009-03-23 | 2009-08-19 | 唐山钢铁股份有限公司 | Q460 level low alloy high-strength corner iron and production process |
| CN101886221A (en) * | 2010-07-16 | 2010-11-17 | 攀钢集团钢铁钒钛股份有限公司 | Micro-alloy ultra-fine grained hot rolled steel plate and production method thereof |
| CN103361552A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | V-N microalloying 460MPa-level thick plate and manufacturing method thereof |
-
2014
- 2014-04-26 CN CN201410170653.4A patent/CN103911549B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62227031A (en) * | 1986-03-28 | 1987-10-06 | Kobe Steel Ltd | Manufacture of fine grain steel |
| JPH04131323A (en) * | 1990-09-21 | 1992-05-06 | Kobe Steel Ltd | Production of heat treatment saving type high tensile steel wire having excellent fatigue resistance and wear resistance |
| CN101509097A (en) * | 2009-03-23 | 2009-08-19 | 唐山钢铁股份有限公司 | Q460 level low alloy high-strength corner iron and production process |
| CN101886221A (en) * | 2010-07-16 | 2010-11-17 | 攀钢集团钢铁钒钛股份有限公司 | Micro-alloy ultra-fine grained hot rolled steel plate and production method thereof |
| CN103361552A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | V-N microalloying 460MPa-level thick plate and manufacturing method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 冯运莉等: "VN 合金在大规格角钢生产中的应用研究", 《钢铁钒钛》 * |
| 王亦工等: "V-N微合金化提高低合金结构钢强韧性研究", 《金属热处理》 * |
| 王亦工等: "V-N微合金化提高低合金结构钢强韧性研究", 《金属热处理》, vol. 30, no. 9, 31 December 2005 (2005-12-31) * |
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| CN104907513A (en) * | 2015-06-09 | 2015-09-16 | 石家庄钢铁有限责任公司 | Method for continuous casting of large rectangular billet of low-carbon hadifield steel |
| CN106521125A (en) * | 2016-12-20 | 2017-03-22 | 东北大学 | Method for improving strength by ultrarapid cooling of angle steel after rolling |
| CN109023123A (en) * | 2018-10-12 | 2018-12-18 | 石横特钢集团有限公司 | A kind of production method of 840MPa grades of hot rolling anchor pole reinforcing bar |
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| WO2022214107A1 (en) * | 2021-05-12 | 2022-10-13 | 大冶特殊钢有限公司 | Method for rolling high-toughness high-strength low-alloy steel |
| CN114411052A (en) * | 2021-12-24 | 2022-04-29 | 中联先进钢铁材料技术有限责任公司 | V-N microalloyed steel plate with low cost and high strength and toughness and preparation method thereof |
| CN114807768A (en) * | 2022-05-16 | 2022-07-29 | 承德建龙特殊钢有限公司 | Q420 low-alloy high-strength structural steel and production method thereof |
| CN114807768B (en) * | 2022-05-16 | 2023-10-13 | 承德建龙特殊钢有限公司 | Q420 low-alloy high-strength structural steel and production method thereof |
| CN116200672A (en) * | 2022-11-25 | 2023-06-02 | 重庆钢铁股份有限公司 | Low-cost high-strength structural steel plate Q460D and manufacturing method |
| CN115976418A (en) * | 2023-02-23 | 2023-04-18 | 山西建龙实业有限公司 | Non-quenched and tempered GF20Mn2V steel for high-strength bolt and preparation method thereof |
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