CN106636961A - Cu-containing nanophase strengthened easy-to-weld steel and preparation method - Google Patents
Cu-containing nanophase strengthened easy-to-weld steel and preparation method Download PDFInfo
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Abstract
The invention provides Cu-containing nanophase strengthened easy-to-weld steel and a preparation method. The Cu-containing nanophase strengthened easy-to-weld steel comprises the following components by weight percent: less than 0.05% of C, 0.1-0.3% of Si, 0.5-1.5% of Mn, less than 0.002% of S, less than 0.004% of P, 1.5-2.5% of Cu, 4-8% of Ni, 0.3-0.8% of Al, 0.2-1% of Mo, less than 1% of Cr, 001-0.04% of Nb, 0.01-0.05% of Ti, 0.01-0.08% of V, and the balance of Fe and inevitable impurity elements. The preparation method comprises the following steps: performing induction smelting and casting under argon protection; heating cast ingots at 1,100-1,200 DEG C for 1-3 h, directly performing hot rolling at the initial temperature of 1,050-1,150 DEG C and the final temperature of 950 DEG C, and performing super-speed high-pressure water cooling after final rolling, wherein the hot rolling deformation is 50-90%; and selectively conducting solution and aging heat treatment on a rolled steel plate to obtain high-strength high-toughness easy-to-weld steel. The alloy steel is high in strength, good in plasticity, excellent in low-temperature impact toughness and easy to weld. Besides, the machining process is high in controllability, the cost is low and the operation is simple.
Description
Technical field
The present invention relates to a kind of easily welding steel, the present invention also relates to a kind of preparation method of easy welding steel.
Background technology
Cupric nanometer phase low-alloy steel, while with high intensity, it may have good extensibility, low-temperature impact toughness
With easy welding performance, therefore shipbuilding, automobile making, building, the field of bridge suffer from more wide application.One
As the yield strength of low-alloy steel be usually less than 700MPa, and be but difficult to ensure that while generally there is high intensity good low
Warm toughness and welding performance.
Traditional high intensity steel capital is the higher martensite of phosphorus content or lower bainite tissue, and a large amount of introducings of carbon are big
The welding performance of material is reduced greatly.Simultaneously material is uniform to ensure core structure, it is necessary to ensure that have compared with the steel plate of think gauge
Enough quenching degree, needs the alloying elements such as Ni, Cr, Mo of addition high level in steel.The intensity rank requirement of steel is higher, adds
Plus the content of alloying element also accordingly increase, cost of alloy is improved naturally.With the raising of intensity, the carbon equivalent of steel significantly increases
Plus, this is greatly reduced the welding performance of steel.
At present, delivered both at home and abroad and obtained the low-alloy steel of high intensity using addition alloying element and controlled rolling and controlled cooling, by force
Degree rank more than 800MPa all it is difficult to ensure that preferable elongation percentage, does not characterize its cryogenic property yet.
In the patent document of Publication No. CN103361566A, disclose a kind of by controlling casting, rolling and being heat-treated
Technique, the cupric low-alloy steel of the high-strength and high ductility for obtaining.But its yield strength is less than 850MPa.
In the patent document of Publication No. CN102140606A, disclose a kind of by control hot rolling each passage interval time
And deflection, cooldown rate and Isothermal Treatment, the high low-alloy multi-phase Steels of the hot rolling for obtaining.Its yield strength 800MPa, but
Only 20% or so, low-temperature flexibility is not specified elongation percentage.
In the patent document of Publication No. CN104513927A, the height that a kind of employing isothermal heat treatment process is obtained is disclosed
Strength steel sheet.Its yield strength is more than 390MPa, and tensile strength is 800MPa, and -20 DEG C of ballistic work is only 100J.
The content of the invention
It is an object of the invention to provide a kind of intensity is high, plasticity it is good with mutually strengthen easily with low-temperature flexibility nanometer containing Cu
Welding steel.The present invention also aims to provide a kind of microstructure and crystalline substance that can efficiently control matrix phase and nanometer precipitated phase
The nanometer containing Cu of particle size mutually strengthens the preparation method of easily welding steel.
The nanometer containing Cu of the present invention is mutually strengthened easily its percentage by weight of welding steel and is consisted of：C<0.05、Si:0.1～0.3,
Mn:0.5～1.5, S<0.002、P<0.004、Cu:1.5～2.5, Ni:4～8, Al:0.3～0.8, Mo:0.2～1, Cr<1、
Nb:0.01～0.04, Ti:0.01～0.05, V:0.01～0.08, remaining is Fe and inevitable impurity element.
The nanometer containing Cu of the present invention mutually strengthens the preparation method of easily welding steel：By design composition under argon gas protective condition
Induction melting and casting are carried out, ingot casting heats 1～3h at 1100～1200 DEG C and carries out optimization annealing, afterwards using controlled rolling and controlled cooling
Technology is rolled, and the rolling was specifically included with the next stage：
First stage is roughing, and the ingot casting of homogenizing annealing directly carries out roughing, and roughing initial temperature is 1050～1150
DEG C, finishing temperature is 1000～1050 DEG C, and roughing overall compression ratio is 50～80%；
Second stage is finish rolling, and finish rolling initial temperature is 950～1000 DEG C, and finishing temperature is 850～900 DEG C, and finish rolling is total
Compression ratio is 10%-30%；
Phase III is quick water-cooled, and finish rolling terminates rear direct voltage and waters quick cooling, and final cooling temperature is below 50 DEG C.
Steel plate after controlled rolling and controlled cooling carries out solid solution and Ageing Treatment, and solid solubility temperature is 800 DEG C～1000 DEG C, and temperature retention time is
5 minutes～2 hours, afterwards rapid water was cooled to room temperature；Aging temp is 500 DEG C～700 DEG C, temperature retention time 5 minutes～10 hours,
Afterwards rapid water is cooled to room temperature.
The invention provides a kind of nanometer containing Cu mutually strengthens high-intensity high-tenacity easily welds steel and preparation method, the present invention is logical
The proportionate relationship of control Cu, Mn, Ni, Al essential element is crossed, and adds other alloying elements, in addition rational rolling mill practice and heat
Handling process, has efficiently controlled the microstructure and crystallite dimension of matrix phase and nanometer precipitated phase, a kind of high-strength so as to obtain
The easy welding steel of degree, good plasticity and low-temperature flexibility.
The nanometer containing Cu of the present invention mutually strengthens acting as the key component included in easily welding steel：
Cu：Cu is austenite stabilizer element, can reduce austenite transformation temperature, suppresses the generation of high temperature transformation product,
Impact is produced on the transformation and structure refinement organized.Meanwhile, Cu can induce precipitation tiny heavy under certain heat treatment condition
Shallow lake phase, and make the alloying elements such as Ni, Al, Mn to the precipitation phase precursor polymerization, copper-rich nanometer phase is formed, the copper-rich nanometer is mutually strong
Change can effectively replace carbon to strengthen, so as to reduce carbon content.Therefore, a certain amount of copper is added to improve the intensity of steel, corrosion resistant
Corrosion, fatigue resistance, raising creep strength and impact flexibility, while improve the welding performance of material, processability and machine adding
Work performance etc..
Ni：The Ni of solution can improve ferritic intensity, when Ni contents are raised, can guarantee that same compared with high-ductility
Shi Tigao intensity.When Ni contents are raised, while can guarantee that compared with high-ductility intensity is improved.Ni also ensures that the uniform of Steel Properties
Property, significantly improve low-temperature impact toughness.
Al：Al in steel has the ability of deoxidation and the effect of denitrogenation.A small amount of Al has the timeliness effect for suppressing mild steel,
Crystal grain thinning, raising impact flexibility, the effect of the cold brittleness transition temperature of reduction steel.Al does not have carbide, and aluminum oxide belongs to hard
Crisp phase.When aluminium content is higher, during forging rolling, alumina particle forms bar along machine direction, has influence on the modeling of steel
Toughness.
Mn：Effects of the Mn in steel is deoxidation desulfuration.Mn has certain effect in terms of solution strengthening in steel, in addition Mn
It is additionally favorable for improving the mechanical property such as obdurability and processing performance quenching degree and hot-working character of steel.But Mn content mistakes in steel
Height can affect steel that segregation phenomena is produced in casting, and rolling is easy to cracking.
The nanometer containing Cu of the present invention mutually strengthens each element in easily welding steel, particularly compared with precious metal element content compared with
It is few so that the cost of the steel is greatly reduced.
The alloy design Precise components proportioning of the present invention, while its intensity is ensured, its carbon equivalent ce and cold crack are quick
Sense indices P cm value is relatively low, and postwelding heat affected area is not likely to produce cold cracking inclination so that the alloy of the invention has welding well
Performance, do not preheat or in the case that preheating temperature is relatively low it is i.e. solderable.
The operation of rolling of the present invention adopts advanced Controlled Rolling And Controlled Cooling, fast with process velocity, and temperature control and slippage are smart
The advantages of accurate, cooldown rate is high, sheet deformation is uniform.By the roughing temperature for controlling austenite recrystallization area, roughing deflection,
And austenite or austenite-ferrite two-phase section final rolling temperature, the type of cooling and cooldown rate are controlled, control matrix phase
Microstructure and size, therefore the alloy is just provided with preferable comprehensive mechanical property in rolling state.Also it is heat treatment then
Technique expands opereating specification.
On the basis of rolling mill practice, the present invention is mutually high-strength to nanometer containing Cu with aging treatment process using rational solid solution
Degree high tenacity is easily welded the mechanical property of steel and is further optimized.By rational solution treatment, there is austenite structure
Phase transformation, forms polygon sections ferritic or acicular ferrite.Subsequently by rational aging temp and timeliness time control nanometer
Separate out, obtain the precipitate size and number density matching of optimization, nanometer precipitated phase is uniformly distributed in the base, the resistance to dislocation
Effect is hindered to significantly improve intensity, simultaneously because precipitated phase core is softer Cu elements, dislocation is using the mechanism that cuts through by separating out
Phase, therefore plasticity is not significantly reduced while intensity is improved.Add Ni elements in steel, crystal grain thinning strengthens crystal boundary, low
Warm toughness is significantly improved.
To sum up, phosphorus content and carbon equivalent are relatively low in low-alloy steel of the invention, keep while the intensity with superelevation
Good plasticity and toughness, relatively low carbon equivalent causes to be not readily available martensitic structure during welding cooling, has
Excellent welding performance, this reduces material cost and welding cost and its important to shipbuilding industry.Cupric nanometer mutually strengthens height
Strength high toughness easily weld steel be on the basis of ultralow carbon alloy steel designing technique, add in steel a certain amount of Cu, Mn,
The alloying elements such as Ni, Al, obtain the precipitated phase of nano-grade size after Ageing Treatment, and the precipitated phase is remarkably improved material
Intensity, compensate for, due to dropping the loss of strength that C brings, making the steel have high intensity, Gao Yan while adding other microalloy elements
Malleability, good low-temperature flexibility and welding performance.
Description of the drawings
Fig. 1 is metallograph of the embodiment 1 using the present invention.
Fig. 2 is metallograph of the embodiment 2 using the present invention.
Fig. 3 is metallograph of the embodiment 3 using the present invention.
Fig. 4 is metallograph of the embodiment 4 using the present invention.
Fig. 5 is metallograph of the embodiment 5 using the present invention.
Specific embodiment
Technical scheme is described in detail below by way of specific embodiment, it should be understood that these enforcements
Example is, for illustrating the present invention, rather than limitation of the present invention, the present invention to be done under the concept thereof of the present invention is simply changed
Enter, belong to the scope of protection of present invention.
Embodiment 1：
The present embodiment is a kind of phase high-strength and high-ductility low-alloy steel of nanometer containing Cu and preparation method, the chemical composition of alloy
(mass percent) is：C<0.05, Si:0.2, Mn:1, S:<0.003, P:<0.004, Cu:2, Ni:4, Al:0.5, Nb:0.03,
Ti:0.05, balance of Fe and inevitable impurity.It is incubated at 1150 DEG C after 2h carries out homogenizing annealing on tandem-rolling continuous casting machine
Rolled；Roughing start rolling temperature is 1000 DEG C, rolls 4 passages, average drafts 12% every time, total reduction 50%, rolling
Temperature control is between 950 DEG C～1050 DEG C；Finish rolling start rolling temperature is 800 DEG C, rolls 6 passages, does not have reduction in pass 15%, always
Reduction ratio 80%, finishing temperature is less than 850 DEG C, and finish to gauge thickness is 14mm；Watered using ultrafast cooling rate after rolling, final cooling temperature exists
Less than 50 DEG C.Solid solution and Ageing Treatment are not suffered from.Metallographic structure photo is shown in Fig. 1, and its mechanical property is shown in Table 1
Embodiment 2：
The present embodiment is a kind of phase high-strength and high-ductility low-alloy steel of nanometer containing Cu and preparation method, the chemical composition of alloy
(mass percent) is：C<0.05, Si:0.2, Mn:1, S:<0.003, P:<0.004, Cu:2, Ni:4, Al:0.5, Nb:0.03,
Ti:0.05, balance of Fe and inevitable impurity.It is incubated at 1150 DEG C after 2h carries out homogenizing annealing on tandem-rolling continuous casting machine
Rolled；Roughing start rolling temperature is 1000 DEG C, rolls 4 passages, average drafts 12% every time, total reduction 50%, rolling
Temperature control is between 950 DEG C～1050 DEG C；Finish rolling start rolling temperature is 800 DEG C, rolls 6 passages, does not have reduction in pass 15%, always
Reduction ratio 80%, finishing temperature is less than 850 DEG C, and finish to gauge thickness is 14mm；Watered using ultrafast cooling rate after rolling, final cooling temperature exists
Less than 50 DEG C.Solution treatment, temperature retention time 2h are carried out at 800 DEG C.Ageing Treatment, temperature retention time 1h are carried out at 550 DEG C.Metallographic group
Knit photo and see Fig. 2, its mechanical property is shown in Table 1
Embodiment 3：
The present embodiment is a kind of phase high-strength and high-ductility low-alloy steel of nanometer containing Cu and preparation method, the chemical composition of alloy
(mass percent) is：C<0.05, Si:0.2, Mn:1, S:<0.003, P:<0.004, Cu:2, Ni:6, Al:0.5, Mo:0.5,
Cr:0.5, Nb:0.03, Ti:0.05, balance of Fe and inevitable impurity.Being incubated 2h at 1150 DEG C carries out homogenizing annealing
Rolled on tandem-rolling continuous casting machine afterwards；Roughing start rolling temperature is 1000 DEG C, rolls 4 passages, averagely each drafts 12%, always
Reduction ratio 50%, rolling temperature is controlled between 950 DEG C～1050 DEG C；Finish rolling start rolling temperature is 900 DEG C, rolls 6 passages, is not had
Secondary drafts 15%, total reduction 80%, finishing temperature is less than 920 DEG C, and finish to gauge thickness is 14mm；Ultrafast cooling rate is adopted after rolling
Water, final cooling temperature is below 50 DEG C.Ageing Treatment, temperature retention time 2h are carried out at 550 DEG C.Metallographic structure photo is shown in Fig. 3, its power
Learn performance and be shown in Table 1
Embodiment 4：
The present embodiment is a kind of phase high-strength and high-ductility low-alloy steel of nanometer containing Cu and preparation method, the chemical composition of alloy
(mass percent) is：C<0.05, Si:0.2, Mn:1, S:<0.003, P:<0.004, Cu:2, Ni:6, Al:0.5, Nb:0.03,
Ti:0.05, balance of Fe and inevitable impurity.It is incubated at 1150 DEG C after 2h carries out homogenizing annealing on tandem-rolling continuous casting machine
Rolled；Roughing start rolling temperature is 1000 DEG C, rolls 4 passages, average drafts 12% every time, total reduction 50%, rolling
Temperature control is between 950 DEG C～1050 DEG C；Finish rolling start rolling temperature is 800 DEG C, rolls 6 passages, does not have reduction in pass 15%, always
Reduction ratio 80%, finishing temperature is less than 850 DEG C, and finish to gauge thickness is 14mm；Watered using ultrafast cooling rate after rolling, final cooling temperature exists
Less than 50 DEG C.Solution treatment is carried out at 880 DEG C, temperature retention time 5min carries out Ageing Treatment, temperature retention time 1h at 565 DEG C.Metallographic
Macrograph is shown in Fig. 4, and its mechanical property is shown in Table 1
Embodiment 5：
The present embodiment is a kind of phase high-strength and high-ductility low-alloy steel of nanometer containing Cu and preparation method, the chemical composition of alloy
(mass percent) is：C<0.05, Si:0.2, Mn:1, S:<0.003, P:<0.004, Cu:2, Ni:6, Al:0.5, Nb:0.03,
Ti:0.05, balance of Fe and inevitable impurity.It is incubated at 1150 DEG C after 2h carries out homogenizing annealing on tandem-rolling continuous casting machine
Rolled；Roughing start rolling temperature is 1000 DEG C, rolls 4 passages, average drafts 12% every time, total reduction 50%, rolling
Temperature control is between 950 DEG C～1050 DEG C；Finish rolling start rolling temperature is 800 DEG C, rolls 6 passages, does not have reduction in pass 15%, always
Reduction ratio 80%, finishing temperature is less than 850 DEG C, and finish to gauge thickness is 14mm；Watered using ultrafast cooling rate after rolling, final cooling temperature exists
Less than 50 DEG C.Solution treatment is carried out at 880 DEG C, temperature retention time 44min carries out Ageing Treatment, temperature retention time 73min at 540 DEG C.
Metallographic structure photo is shown in Fig. 5, and its mechanical property is shown in Table 1.
The mechanical property of the invention steel of table 1
Claims (3)
1. a kind of nanometer containing Cu mutually strengthens easily welding steel, it is characterized in that its percentage by weight is consisted of：C<0.05、Si:0.1～
0.3、Mn:0.5～1.5, S<0.002、P<0.004、Cu:1.5～2.5, Ni:4～8, Al:0.3～0.8, Mo:0.2～1, Cr<
1、Nb:0.01～0.04, Ti:0.01～0.05, V:0.01～0.08, remaining is Fe and inevitable impurity element.
2. the nanometer containing Cu described in a kind of claim 1 mutually strengthens the preparation method of easily welding steel, it is characterized in that：By design composition
Induction melting and casting are carried out under argon gas protective condition, ingot casting heats 1～3h at 1100～1200 DEG C and carries out optimization annealing,
Rolled using Controlled Rolling And Controlled Cooling afterwards, the rolling was specifically included with the next stage：
First stage is roughing, and the ingot casting of homogenizing annealing directly carries out roughing, and roughing initial temperature is 1050～1150 DEG C, eventually
Temperature is rolled for 1000～1050 DEG C, roughing overall compression ratio is 50～80%；
Second stage is finish rolling, and finish rolling initial temperature is 950～1000 DEG C, and finishing temperature is 850～900 DEG C, finish rolling total compression
Than for 10%-30%；
Phase III is quick water-cooled, and finish rolling terminates rear direct voltage and waters quick cooling, and final cooling temperature is below 50 DEG C.
3. nanometer containing Cu according to claim 2 mutually strengthens the preparation method of easily welding steel, it is characterized in that：After controlled rolling and controlled cooling
Steel plate carry out solid solution and Ageing Treatment, solid solubility temperature is 800 DEG C～1000 DEG C, and temperature retention time is 5 minutes～2 hours, afterwards
Quick water-cooled；Aging temp is 500 DEG C～700 DEG C, temperature retention time 5 minutes～10 hours, afterwards quick water-cooled.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546882A (en) * | 2018-06-01 | 2018-09-18 | 钢铁研究总院 | Enhanced high-strength refractory corrosion-resisting steel and its manufacturing method is precipitated in a kind of Cu |
| CN110205545A (en) * | 2019-06-05 | 2019-09-06 | 中国科学院金属研究所 | The high-strength nano that can inhibit marine biofouling strengthens steel and preparation method thereof |
| CN110229999A (en) * | 2019-06-13 | 2019-09-13 | 首钢集团有限公司 | A kind of 900MPa grades of nanometer precipitation strength ductility steel plate and its manufacturing method |
| TWI690599B (en) * | 2019-06-06 | 2020-04-11 | 義守大學 | Welding method of copper-nickel-silicon-chromium alloy and repair method of alloy product |
| CN111304549A (en) * | 2020-03-27 | 2020-06-19 | 中国科学院金属研究所 | High-strength high-toughness Cu-containing low-alloy high-strength steel and heat treatment method thereof |
| CN111647803A (en) * | 2020-05-12 | 2020-09-11 | 首钢集团有限公司 | Copper-containing high-strength steel and preparation method thereof |
| CN113667899A (en) * | 2021-09-03 | 2021-11-19 | 太原理工大学 | Method for producing 700MPa grade high-strength steel by finely dispersing precipitated phase particles |
| CN114058960A (en) * | 2021-11-12 | 2022-02-18 | 哈尔滨工程大学 | High-strength high-toughness easy-to-weld nano steel with thickness of 25-60 mm and thickness of 1000MPa and preparation method thereof |
| CN114058815A (en) * | 2021-11-12 | 2022-02-18 | 哈尔滨工程大学 | 1150 MPa-grade high-strength high-toughness easy-welding nano steel and preparation method thereof |
| CN114058790A (en) * | 2021-11-12 | 2022-02-18 | 哈尔滨工程大学 | 1000 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 5-25 mm and preparation method thereof |
| CN114086051A (en) * | 2021-11-12 | 2022-02-25 | 哈尔滨工程大学 | 850 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 60-120 mm and preparation method thereof |
| CN114164374A (en) * | 2021-11-12 | 2022-03-11 | 哈尔滨工程大学 | 850 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 5-60 mm and preparation method thereof |
| CN114164315A (en) * | 2021-11-12 | 2022-03-11 | 哈尔滨工程大学 | High-strength high-toughness easy-to-weld nano steel with thickness of 60-120 mm and thickness of 1000MPa and preparation method thereof |
| CN114480988A (en) * | 2021-12-27 | 2022-05-13 | 北京科技大学 | Multiphase composite high-strength high-toughness low-density steel and preparation method thereof |
| WO2023246082A1 (en) * | 2022-06-21 | 2023-12-28 | 育材堂（苏州）材料科技有限公司 | Hot work die steel and heat treatment method therefor, and hot work die |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546882A (en) * | 2018-06-01 | 2018-09-18 | 钢铁研究总院 | Enhanced high-strength refractory corrosion-resisting steel and its manufacturing method is precipitated in a kind of Cu |
| CN108546882B (en) * | 2018-06-01 | 2020-03-20 | 钢铁研究总院 | Cu precipitation enhanced high-strength refractory corrosion-resistant steel and manufacturing method thereof |
| CN110205545A (en) * | 2019-06-05 | 2019-09-06 | 中国科学院金属研究所 | The high-strength nano that can inhibit marine biofouling strengthens steel and preparation method thereof |
| CN110205545B (en) * | 2019-06-05 | 2021-01-08 | 中国科学院金属研究所 | High-strength nano reinforced steel capable of inhibiting marine biofouling and preparation method thereof |
| TWI690599B (en) * | 2019-06-06 | 2020-04-11 | 義守大學 | Welding method of copper-nickel-silicon-chromium alloy and repair method of alloy product |
| CN110229999A (en) * | 2019-06-13 | 2019-09-13 | 首钢集团有限公司 | A kind of 900MPa grades of nanometer precipitation strength ductility steel plate and its manufacturing method |
| CN110229999B (en) * | 2019-06-13 | 2020-09-15 | 首钢集团有限公司 | 900 MPa-level nano precipitation strengthening high-toughness steel plate and manufacturing method thereof |
| CN111304549A (en) * | 2020-03-27 | 2020-06-19 | 中国科学院金属研究所 | High-strength high-toughness Cu-containing low-alloy high-strength steel and heat treatment method thereof |
| CN111304549B (en) * | 2020-03-27 | 2021-09-24 | 中国科学院金属研究所 | High-strength high-toughness Cu-containing low-alloy high-strength steel and heat treatment method thereof |
| CN111647803A (en) * | 2020-05-12 | 2020-09-11 | 首钢集团有限公司 | Copper-containing high-strength steel and preparation method thereof |
| CN113667899B (en) * | 2021-09-03 | 2022-07-19 | 太原理工大学 | Method for producing 700MPa grade high-strength steel by finely dispersing precipitated phase particles |
| CN113667899A (en) * | 2021-09-03 | 2021-11-19 | 太原理工大学 | Method for producing 700MPa grade high-strength steel by finely dispersing precipitated phase particles |
| CN115305409B (en) * | 2021-11-12 | 2023-08-15 | 哈尔滨工程大学 | High-strength high-toughness easily-welded nano steel with thickness of 5-60 mm and thickness of 850MPa and preparation method thereof |
| CN114058815A (en) * | 2021-11-12 | 2022-02-18 | 哈尔滨工程大学 | 1150 MPa-grade high-strength high-toughness easy-welding nano steel and preparation method thereof |
| CN114058790A (en) * | 2021-11-12 | 2022-02-18 | 哈尔滨工程大学 | 1000 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 5-25 mm and preparation method thereof |
| CN114086051A (en) * | 2021-11-12 | 2022-02-25 | 哈尔滨工程大学 | 850 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 60-120 mm and preparation method thereof |
| CN114164374A (en) * | 2021-11-12 | 2022-03-11 | 哈尔滨工程大学 | 850 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 5-60 mm and preparation method thereof |
| CN114164315A (en) * | 2021-11-12 | 2022-03-11 | 哈尔滨工程大学 | High-strength high-toughness easy-to-weld nano steel with thickness of 60-120 mm and thickness of 1000MPa and preparation method thereof |
| CN114058960A (en) * | 2021-11-12 | 2022-02-18 | 哈尔滨工程大学 | High-strength high-toughness easy-to-weld nano steel with thickness of 25-60 mm and thickness of 1000MPa and preparation method thereof |
| CN115305409A (en) * | 2021-11-12 | 2022-11-08 | 哈尔滨工程大学 | 850 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 5-60 mm and preparation method thereof |
| CN114058815B (en) * | 2021-11-12 | 2023-12-19 | 哈尔滨工程大学 | 1150 MPa-level high-strength high-toughness easily-welded nano steel and preparation method thereof |
| CN114164315B (en) * | 2021-11-12 | 2023-02-14 | 哈尔滨工程大学 | 1000 MPa-grade high-strength high-toughness easy-welding nano steel with thickness of 60-120 mm and preparation method thereof |
| CN114480988A (en) * | 2021-12-27 | 2022-05-13 | 北京科技大学 | Multiphase composite high-strength high-toughness low-density steel and preparation method thereof |
| CN114480988B (en) * | 2021-12-27 | 2023-01-06 | 北京科技大学 | Multiphase composite high-strength high-toughness low-density steel and preparation method thereof |
| WO2023246082A1 (en) * | 2022-06-21 | 2023-12-28 | 育材堂（苏州）材料科技有限公司 | Hot work die steel and heat treatment method therefor, and hot work die |
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Application publication date: 20170510 Assignee: SICHUAN HONGJIAN HEAVY MACHINERY MANUFACTURING Co.,Ltd. Assignor: HARBIN ENGINEERING University Contract record no.: X2022230000100 Denomination of invention: A kind of Cu-containing nano-phase reinforced easy-to-weld steel and preparation method Granted publication date: 20180424 License type: Common License Record date: 20220922 |
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