CN103352166B - A kind of High-strength magnetoconductive steel plate and production method thereof - Google Patents

Abstract

The invention discloses a kind of High-strength magnetoconductive steel plate, main component is Fe, also comprise C, Mn, Si, P, S, Als, Nb, Ti, calculate by mass percentage, the content of mentioned component is: C≤0.10,0.09≤Mn < 0.90, Si≤0.20,0.08≤P≤0.20, S≤0.012,0.015≤Als≤0.05,0.01≤Nb≤0.03, Ti≤0.003, and inevitable impurity.The invention also discloses the production method of this steel plate.Adopt technique scheme, by smelting chemical Composition Control, appropriate technology establishment, obtain and there is higher force performance and the cold rolled annealed steel plate possessing good DC magnetic performance.This cold-rolled steel sheet possesses high-yield strength and magnetic property, can stand large load and do not deform in using.<!--1-->

Description

A kind of High-strength magnetoconductive steel plate and production method thereof

Technical field

The invention belongs to the technical field of metallurgical industry product and production thereof, relate to steel plate strip product and production method thereof.More particularly, the present invention relates to a kind of High-strength magnetoconductive steel plate, and the production method of this steel plate.

Background technology

Set up magnetic field occasion for needs application, the method improving magneticstrength adopts magnetically permeable material to amplify magneticstrength.That brings along with the increase of magneticstrength or motion increases by force intensity, needs magnetically permeable material to possess at least dual property, namely requires that magnetically permeable material has high magnetic induction density and high intensity index.

The intensity improving material is generally add alloy element or undergone phase transition by thermal treatment obtain high strength phase or cause high density dislocation or intergranular precipitation occur and strengthens.Adding of alloy element can improve the strength of materials, plasticity and toughness simultaneously, the excessive remarkable reduction magnetic property of inexpensive alloy element addition, and thermal treatment undergoes phase transition to obtain high strength phase or cause high density dislocation to relate to thermal treatment process and controls.Meanwhile, in most cases, thermal treatment process needs the cooperation adding alloy element.

Below the Patents document retrieved:

In order to make magnetically permeable material have high magnetic induction density and intensity index, the technical scheme of English Patent GB1351884 is: the method being improved carbon, manganese and silicone content by alloying.Although its technical scheme obtains high strength index, magnetic induction density obviously reduces.

The technical scheme of Chinese patent CN2006100197710, CN2006100197725 and CN200610019773X is: in order to improve magnetically permeable material intensity, keep high magnetic induction density, pass through alloying, increase manganese and niobium, by the Different adding amount of manganese and niobium, control suitable hot rolling and cold rolled annealed Technology, obtain high mechanical property (intensity index), trying one's best that magnetic induction density reduces simultaneously is few.

But above technical scheme related products intensity is high not enough, or magnetic induction density is lower.

Summary of the invention

The invention provides a kind of High-strength magnetoconductive steel plate, its objective is and obtain good magnetic property and mechanical property.

To achieve these goals, the technical scheme that the present invention takes is:

High-strength magnetoconductive steel plate provided by the present invention, main component is Fe, also comprise C, Mn, Si, P, S, Als, Nb, Ti, calculate by mass percentage, the content of mentioned component is: C≤0.10,0.09≤Mn < 0.90, Si≤0.20,0.08≤P≤0.20, S≤0.012,0.015≤Als≤0.05,0.01≤Nb≤0.03, Ti≤0.003, and inevitable impurity.

Optimal technical scheme one:

Calculate by mass percentage, the content of mentioned component is: C:0.070, Mn:0.22, Si:0.027, P:0.089, S:0.0078, Als:0.06, Nb:0.025, Ti:0.0025.

Optimal technical scheme two:

Calculate by mass percentage, the content of mentioned component is: C:0.045, Mn:0.26, Si:0.123, P:0.118, S:0.006, Als:0.05, Nb:0.027, Ti:0.0020.

Optimal technical scheme three:

Calculate by mass percentage, the content of mentioned component is: C:0.019, Mn:0.20, Si:0.083, P:0.136, S:0.004, Als:0.027, Nb:0.024, Ti:0.0019.

Optimal technical scheme four:

Calculate by mass percentage, the content of mentioned component is: C:0.057, Mn:0.22, Si:0.056, P:0.089, S:0.004, Als:0.028, Nb:0.021, Ti:0.0023.

In order to realize the goal of the invention identical with technique scheme, present invention also offers the production method of above-described High-strength magnetoconductive steel plate, its technical scheme is:

By the proportioning of mentioned component, through smelting into qualified molten steel, then become coils of hot-rolled steel through continuous casting and rolling, pickling afterwards, cold rolling, annealing, smooth, become qualified finished steel coils; Or again through finishing, become qualified finished steel coils.

The concrete technical scheme of described production method is:

Molten steel reaches above chemical composition, then through continuous casting and rolling, and slab thickness 40 ~ 110mm, soaking temperature is 1100 ~ 1190 DEG C, hot rolling finishing temperature 820 ~ 890 DEG C, coiling temperature 550 ~ 750 DEG C after hot rolling; According to the difference that finished product requires, coils of hot-rolled steel thickness is at 2.0 ~ 6.0mm.

Then coils of hot-rolled steel carries out pickling, cold rolling, pickling and cold rollingly meet general cold-rolled products requirement;

Coil of strip after cold rolling carries out periodicity annealing, and its annealing process is: annealing temperature 400 ~ 530 DEG C, soaking time 0.5 ~ 3 hour;

Carry out smooth afterwards, smooth unit elongation 0.2 ~ 1.5%;

If needed, also carry out finished machined, finished machined is to the size required.

Preferred technical scheme is: after hot rolling, coiling temperature is 650 DEG C ~ 750 DEG C.

The present invention adopts technique scheme, by smelting chemical Composition Control, appropriate technology establishment, obtains and has higher force performance and the cold rolled annealed steel plate possessing good DC magnetic performance.This cold-rolled steel sheet possesses high-yield strength and magnetic property, can stand large load and do not deform in using.In the mechanical property of the steel plate produced according to mentioned component and method, yield strength reaches 600N/mm ²above, tensile strength reaches 650N/mm ²above, magnetic induction density is B ₅₀be greater than 1.66T, B ₁₀₀be greater than 1.80T.

Embodiment

Below by way of the description to embodiment, the specific embodiment of the present invention is described in further detail, has more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.

The present invention is a kind of High-strength magnetoconductive steel plate, and relate to requirement and have good DC magnetic performance and strength steel strips and production method thereof, this product is used for the occasion that magnetic field is set up, and stands very large load in using.

The object of the invention is to develop there is strong mechanical performance and possess the cold rolled annealed steel plate of high DC magnetic performance.The production of this steel plate, by smelting chemical Composition Control, appropriate process system, obtains high magnetic property and mechanical property.Plate Production is produced by the flow process of steel-making, continuous casting and rolling (thin slab), pickling, cold rolling, cyclic annealing and related process.

Technical scheme of the present invention is as follows:

The process of steel of the present invention smelts into qualified molten steel, and then continuous casting and rolling becomes coils of hot-rolled steel, and pickling afterwards, cold rolling, annealing, smooth, (finishing) be qualified finished steel coils.

The chemical composition ranges of requirement steel is (wt%): C≤0.10,0.09≤Mn < 0.90, Si≤0.20,0.08≤P≤0.20, S≤0.012,0.015≤Als≤0.05,0.01≤Nb≤0.03, Ti≤0.003, inevitable impurity, all the other are iron.

Molten steel reaches as above chemical composition, then through continuous casting and rolling, and slab thickness 40 ~ 110mm, soaking temperature 1100 ~ 1190 DEG C, hot rolling finishing temperature 820 ~ 890 DEG C, coiling temperature 550 ~ 750 DEG C, preferably more than 650 DEG C, the 2.0 ~ 6.0mm that do not coexist that coils of hot-rolled steel thickness requires according to finished product.

Then coils of hot-rolled steel carries out pickling, cold rolling.Pickling and cold rollingly meet general cold-rolled products requirement.

Coil of strip after cold rolling carries out periodicity annealing.Annealing process is: annealing temperature 400 ~ 530 DEG C, soaking time 0.5 ~ 3 hour.

Carry out smooth afterwards, smooth unit elongation 0.2 ~ 1.5%.

If needed, finished machined can be carried out.Finished machined is to the size required.

Implementation result of the present invention is as following:

Adopt the chemical composition of table 1, it is coils of hot-rolled steel that molten steel carries out continuous casting and rolling, and coils of hot-rolled steel is through overpickling, cold rolling, and cold-rolled steel sheet annealing temperature is in table 2, and the mechanical performance index obtaining cold-rolled steel sheet is shown in 2, obtains the magnetic property of cold-rolled steel sheet in table 3.This cold-rolled steel sheet possesses very high yield strength and magnetic property, can stand large load and do not deform in using.

According to yield strength in the mechanical property of steel plate of as above method production at 600N/mm ²above, tensile strength 650N/mm ²above, magnetic induction density B ₅₀be greater than 1.66T, B ₁₀₀be greater than 1.80T.

Embodiment:

The chemical composition of steel is in table 1.

Table 1: ladle chemistry (wt%)

Sequence number	C	Si	Mn	P	S	Al	Nb	Ti	Fe
										1	0.070	0.027	0.22	0.089	0.0078	0.06	0.025	0.0025	Surplus
2	0.045	0.123	0.26	0.118	0.006	0.05	0.027	0.0020	Surplus
										3	0.019	0.083	0.20	0.136	0.004	0.027	0.024	0.0019	Surplus
4	0.057	0.056	0.22	0.089	0.004	0.028	0.021	0.0023	Surplus

The sequence number of table 1 and table 2 below, table 3 in correspondence with each other.

Continuous casting of molten steel is thickness 90mm continuously cast bloom, and continuously cast bloom directly enters 1150 DEG C of soaking pits, hot rolling after soaking, hot rolling finishing temperature 860 DEG C, hot roller repairing, batches, coiling temperature 680 DEG C.

Coils of hot-rolled steel through overpickling, be cold rolled to specific thickness.

Coil of strip after cold rolling loads bell furnace and carries out cyclic annealing, and annealing process is in table 2.

Table 2: cyclic annealing technique

Coil of strip after annealing is smooth through levelling machine.

Through the mechanical property of above operation and technological test steel in table 2, magnetic property in table 3.

Table 3: the magnetic property of coil of strip

Sequence number	Magnetic induction density B 50（T）	Magnetic induction density B 100（T）
			1-1	1.69	1.82
1-2	1.69	1.82
			2-1	1.70	1.83
2-2	1.70	1.82
			3-1	1.67	1.81
3-2	1.67	1.81
			4-1	1.66	1.80
4-2	1.67	1.80

Explanation to above-mentioned each table content:

1, in table 1, the chemical composition of sequence number 1 illustrates in steel and with the addition of niobium especially and phosphorus carries out alloying, and in the corresponding table 2 of steel, sequence number 1-1 is the mechanical property of annealing temperature 450 DEG C insulation after 2 hours, illustrates that in mechanical property, yield strength is greater than 710N/mm ²; Sequence number 1-2 is the mechanical property of annealing temperature 500 DEG C insulation after 1.5 hours, illustrates that in mechanical property, yield strength is greater than 640N/mm ².In table 3, sequence number 1-1 and 1-2 is corresponding magnetic induction density B ₅₀for 1.69T, B ₁₀₀for 1.82T.

2, in table 1, the chemical composition of sequence number 2 illustrates in steel and with the addition of niobium especially and phosphorus carries out alloying, and silicone content is Gao Gang slightly, and in corresponding table 2, sequence number 2-1 is the mechanical property of annealing temperature 450 DEG C insulation after 2 hours, illustrates that in mechanical property, yield strength is greater than 730N/mm ²; Sequence number 2-2 is the mechanical property of annealing temperature 500 DEG C insulation after 1.5 hours, illustrates that in mechanical property, yield strength is greater than 680N/mm ².In table 3, sequence number 2-1 and 2-2 is corresponding magnetic induction density B ₅₀for 1.70T, B ₁₀₀be 1.83 and 1.82T.

3, in table 1, the chemical composition of sequence number 3 illustrates in steel and with the addition of niobium especially and phosphorus carries out alloying, carbon content is lower is 0.019%, in the corresponding table 2 of steel, sequence number 3-1 is the mechanical property of annealing temperature 450 DEG C insulation after 2 hours, illustrates that in mechanical property, yield strength is greater than 730N/mm ²; Sequence number 3-2 is the mechanical property of annealing temperature 500 DEG C insulation after 1.5 hours, illustrates that in mechanical property, yield strength is greater than 680N/mm ².In table 3, sequence number 3-1 and 3-2 is corresponding magnetic induction density B ₅₀for 1.67T, B ₁₀₀for 1.81T.

4, in table 1, the chemical composition of sequence number 4 illustrates in steel and with the addition of niobium especially and phosphorus carries out alloying, carbon content is lower is 0.019%, in the corresponding table 2 of steel, sequence number 4-1 is the mechanical property of annealing temperature 450 DEG C insulation after 2 hours, illustrates that in mechanical property, yield strength is greater than 680N/mm ²; Sequence number 4-2 is the mechanical property of annealing temperature 500 DEG C insulation after 1.5 hours, illustrates that in mechanical property, yield strength is greater than 620N/mm ².In table 3, sequence number 4-1 and 4-2 is corresponding magnetic induction density B ₅₀for 1.66T and 1.67T, B ₁₀₀for 1.80T.

Above to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.

Claims (4)

1. a production method for High-strength magnetoconductive steel plate, described High-strength magnetoconductive steel plate main component is Fe, also comprises C, Mn, Si, P, S, Als, Nb, Ti; Calculate by mass percentage, the content of mentioned component is: C:0.070, Mn:0.22, Si:0.027, P:0.089, S:0.0078, Als:0.06, Nb:0.025, Ti:0.0025, and inevitable impurity;

It is characterized in that described production method is:

By the proportioning of mentioned component, through smelting into qualified molten steel, then become coils of hot-rolled steel through continuous casting and rolling, pickling afterwards, cold rolling, annealing, smooth, become qualified finished steel coils; Or again through finishing, become qualified finished steel coils;

Molten steel reaches above chemical composition, then through continuous casting and rolling, and slab thickness 40 ~ 110mm, soaking temperature is 1100 ~ 1190 DEG C, hot rolling finishing temperature 820 ~ 890 DEG C, coiling temperature 550 ~ 750 DEG C after hot rolling; According to the difference that finished product requires, coils of hot-rolled steel thickness is at 2.0 ~ 6.0mm;

Then coils of hot-rolled steel carries out pickling, cold rolling, pickling and cold rollingly meet general cold-rolled products requirement;

Coil of strip after cold rolling carries out periodicity annealing, and its annealing process is: annealing temperature 400 ~ 530 DEG C, soaking time 0.5 ~ 3 hour;

Carry out smooth afterwards, smooth unit elongation 0.2 ~ 1.5%;

If needed, also carry out finished machined, finished machined is to the size required.

2. a production method for High-strength magnetoconductive steel plate, described High-strength magnetoconductive steel plate main component is Fe, also comprises C, Mn, Si, P, S, Als, Nb, Ti; Calculate by mass percentage, the content of mentioned component is: C:0.045, Mn:0.26, Si:0.123, P:0.118, S:0.006, Als:0.05, Nb:0.027, Ti:0.0020, and inevitable impurity;

It is characterized in that described production method is:

By the proportioning of mentioned component, through smelting into qualified molten steel, then become coils of hot-rolled steel through continuous casting and rolling, pickling afterwards, cold rolling, annealing, smooth, become qualified finished steel coils; Or again through finishing, become qualified finished steel coils;

Molten steel reaches above chemical composition, then through continuous casting and rolling, and slab thickness 40 ~ 110mm, soaking temperature is 1100 ~ 1190 DEG C, hot rolling finishing temperature 820 ~ 890 DEG C, coiling temperature 550 ~ 750 DEG C after hot rolling; According to the difference that finished product requires, coils of hot-rolled steel thickness is at 2.0 ~ 6.0mm;

Then coils of hot-rolled steel carries out pickling, cold rolling, pickling and cold rollingly meet general cold-rolled products requirement;

Coil of strip after cold rolling carries out periodicity annealing, and its annealing process is: annealing temperature 400 ~ 530 DEG C, soaking time 0.5 ~ 3 hour;

Carry out smooth afterwards, smooth unit elongation 0.2 ~ 1.5%;

If needed, also carry out finished machined, finished machined is to the size required.

3. a production method for High-strength magnetoconductive steel plate, described High-strength magnetoconductive steel plate main component is Fe, also comprises C, Mn, Si, P, S, Als, Nb, Ti; Calculate by mass percentage, the content of mentioned component is: C:0.019, Mn:0.20, Si:0.083, P:0.136, S:0.004, Als:0.027, Nb:0.024, Ti:0.0019, and inevitable impurity;

It is characterized in that described production method is:

By the proportioning of mentioned component, through smelting into qualified molten steel, then become coils of hot-rolled steel through continuous casting and rolling, pickling afterwards, cold rolling, annealing, smooth, become qualified finished steel coils; Or again through finishing, become qualified finished steel coils;

Molten steel reaches above chemical composition, then through continuous casting and rolling, and slab thickness 40 ~ 110mm, soaking temperature is 1100 ~ 1190 DEG C, hot rolling finishing temperature 820 ~ 890 DEG C, coiling temperature 550 ~ 750 DEG C after hot rolling; According to the difference that finished product requires, coils of hot-rolled steel thickness is at 2.0 ~ 6.0mm;

Then coils of hot-rolled steel carries out pickling, cold rolling, pickling and cold rollingly meet general cold-rolled products requirement;

Coil of strip after cold rolling carries out periodicity annealing, and its annealing process is: annealing temperature 400 ~ 530 DEG C, soaking time 0.5 ~ 3 hour;

Carry out smooth afterwards, smooth unit elongation 0.2 ~ 1.5%;

If needed, also carry out finished machined, finished machined is to the size required.

4. a production method for High-strength magnetoconductive steel plate, described High-strength magnetoconductive steel plate main component is Fe, also comprises C, Mn, Si, P, S, Als, Nb, Ti; Calculate by mass percentage, the content of mentioned component is: C:0.057, Mn:0.22, Si:0.056, P:0.089, S:0.004, Als:0.028, Nb:0.021, Ti:0.0023, and inevitable impurity;

It is characterized in that described production method is:

By the proportioning of mentioned component, through smelting into qualified molten steel, then become coils of hot-rolled steel through continuous casting and rolling, pickling afterwards, cold rolling, annealing, smooth, become qualified finished steel coils; Or again through finishing, become qualified finished steel coils;

Molten steel reaches above chemical composition, then through continuous casting and rolling, and slab thickness 40 ~ 110mm, soaking temperature is 1100 ~ 1190 DEG C, hot rolling finishing temperature 820 ~ 890 DEG C, coiling temperature 550 ~ 750 DEG C after hot rolling; According to the difference that finished product requires, coils of hot-rolled steel thickness is at 2.0 ~ 6.0mm;

Then coils of hot-rolled steel carries out pickling, cold rolling, pickling and cold rollingly meet general cold-rolled products requirement;

Coil of strip after cold rolling carries out periodicity annealing, and its annealing process is: annealing temperature 400 ~ 530 DEG C, soaking time 0.5 ~ 3 hour;

Carry out smooth afterwards, smooth unit elongation 0.2 ~ 1.5%;

If needed, also carry out finished machined, finished machined is to the size required.