87 results about "Microalloyed steel" patented technology

The invention relates to high-performance low-cost microalloyed steel for an automobile I-shaped front axle and a preparation method of the microalloyed steel, and belongs to the technical field of materials. The steel comprises the following chemical components in percentage by weight: 0.20 to 0.60 percent of C, 0.2 to 1.0 percent of Mn, 0.1 to 0.5 percent of Si, 0.6 to 1.2 percent of Cr, 0.01 to 0.10 percent of Nb, 0.01 to 0.06 percent of Mo and the balance of Plt, 0.01%, Slt; 0.01%, Olt; 0.0040%, and the balance being iron. According to the invention, the contents of Nb and C key alloy elements in the material are accurately controlled, so that Nb can be completely dissolved into a matrix in the smelting process, and the phenomenon of one-time NbC liquation is avoided. Heat treatment is directly carried out after smelting and casting, and the component control strategy is adopted, so that the precipitation of nano-sized dispersed NbC on an original austenite grain boundary is promoted, austenite grains are effectively pinned, and a microstructure with uniform and fine grain size is obtained; a martensitic structure is obtained through quenching, and uniform dispersion and precipitation of NbC carbide are realized in the martensitic structure through a subsequent tempering process, so that the strength and the toughness of the I-shaped front axle are ensured to reach the best match.

The invention discloses a manufacturing method of a high-efficiency and low-cost steel plate for a 345MPa-grade low-temperature pressure vessel, and belongs to the technical field of low-carbon microalloyed steel production. The manufacturing method comprises the steps of molten steel smelting, LF refining, RH vacuum degassing, continuous casting, casting blank heating, rolling, controlled cooling and straightening. The problems that steel plate rolling efficiency is low, rolling resistance is large, and the plate shape is not easy to control are solved, the steel plate is low in cost, high in strength and toughness and high in straightness, and the service safety of the steel plate for the low-temperature pressure container can be guaranteed.

The invention relates to the technical field of low-carbon microalloyed steel production, in particular to economical thin L450M pipeline steel and a method for controlling a banded structure, the steel comprises the following chemical components in percentage by weight: 0.07%-0.09% of C, 0.10%-0.25% of Si, 1.70%-1.80% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.01%-0.02% of Nb, 0.008%-0.015% of Ti, 0.015%-0.04% of Al, 0.05%-0.15% of Cr, 0.003%-0.006% of N and the balance of Fe and inevitable impurities, and the total amount of impurity elements is less than 0.05%; the steel plate produced by the invention has the advantages of low cost, high strength and toughness, low yield ratio and high straightness, and can ensure the service safety of the gas transmission pipeline.

The invention discloses V-N-B microalloyed 550MPa-grade steel for engineering machinery and a preparation method of the V-N-B microalloyed 550MPa-grade steel, and belongs to the technical field of low-carbon microalloyed steel production. The steel comprises the following components in percentage by weight: 0.06%-0.15% of C, 0.2%-0.35% of Si, 1.35%-1.65% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, 0.01%-0.03% of Nb, 0.015%-0.0250% of Ti, 0.15%-0.25% of Cr, 0.015%-0.045% of Als, 0.05%-0.08% of V, 0.0012%-0.0020% of B, 0.01%-0.025% of N, 0.005%-0.010% of Ca and the balance of Fe and inevitable impurities, the total amount of other impurity elements is less than 0.05%, and the problems of low toughness and plate shape unevenness are solved.

The invention relates to a steel welding method. The steel welding method comprises the following steps that microalloyed steel is provided; laser surface alloying treatment is conducted on the area, to be welded, of the microalloyed steel, and an alloy layer is formed in the area to be welded; injecting nitrogen ions and titanium ions into the alloy layer through an ion injection process to obtain a to-be-welded layer; welding the microalloyed steel by taking the to-be-welded layer as a welding operation area, and obtaining a welded part after welding is completed; the welding workpiece is subjected to annealing treatment, and according to the mass percent of the microalloyed steel, the microalloyed steel comprises 0.05%-0.5% of neodymium, 0.05%-0.5% of lanthanum, 0.3%-1.5% of niobium and 0.3%-1.5% of molybdenum. According to the steel welding method provided by the embodiment of the invention, the material of the welding structure can have high tensile strength and impact toughness, and welding defects can be reduced.

The invention aims to provide the high-strength and high-toughness seamless tube for the automobile safety bag and the preparation method of the high-strength and high-toughness seamless tube, and the purpose that the steel tube has high strength, high plasticity and toughness and excellent low-temperature blasting resistance is achieved. The steel for the seamless tube for the automobile safety bag comprises the following chemical components in percentage by weight: 0.02-0.04% of C; 0.2 to 0.4 percent of Si; mn: 1.5 to 1.7%; s < = 0.005%; p is less than or equal to 0.01%; 0.04% to 0.06% of Nb; 0.02 to 0.04 percent of V; 0.01 to 0.02 percent of Ti; 0.7%-1.0% of Cu; n < = 0.002%; o < = 0.002%; al is less than or equal to 0.03%; and the balance of Fe and inevitable impurities. The steel pipe is made of microalloyed steel and has the advantages of being high in strength, good in plasticity and toughness, excellent in blasting resistance, good in cold machining performance and low in cost. The optimization of the steel pipe for the automobile safety bag from material selection to a specific cold drawing process is achieved, and the yield strength of the steel pipe is larger than 860 MPa, the tensile strength is larger than 1000 MPa, and the ductility is larger than 25%; and according to the GB / T241-2007 standard, the steel pipe is placed at the temperature of minus 40 DEG C for 24 hours and then subjected to a blasting experiment, and the pressure of the blasting steel pipe is larger than or equal to 130 MPa.

The invention discloses an efficient and low-cost high-strength steel plate for a 1300MPa-grade low-temperature engineering structure and a manufacturing method of the high-strength steel plate, and belongs to the technical field of low-carbon microalloyed steel production. Optimized steelmaking, heating, rolling, pre-straightening, relaxation, controlled cooling, hot straightening and tempering processes are adopted, an ultra-fast cooling and laminar cooling mode is adopted for controlled cooling, chemical components of the steel plate contain Ce, and finally the problems that the 1300MPa-level hot-rolled steel plate with the thickness of 10-50 mm produced through an online cooling process is low in toughness, high in yield ratio, low in flaw detection qualification rate and uneven in plate shape are solved.

The invention relates to the technical field of low-carbon microalloyed steel production, in particular to an efficient rolling low-yield-ratio 345 MPa-grade low-temperature pressure vessel steel plate and a preparation method thereof.The steel plate comprises, by weight, 0.15%-0.18% of C, 0.20%-0.25% of Si, 1.05%-1.55% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.015% of S, 0.01%-0.02% of Nb, 0.015%-0.04% of Al, 0.003%-0.006% of N and the balance Fe and inevitable impurities, and the total amount of impurity elements is smaller than 0.05%; the preparation method of the steel plate comprises the following technological processes of molten steel smelting, external refining and degassing, continuous casting, casting blank heating, controlled rolling, controlled cooling and air cooling to the room temperature. According to the method, the continuous casting billet with the thickness of 170-250 mm is used for efficiently producing the 345 MPa grade steel plate with the thickness of 10-50 mm and the low yield ratio for the low-temperature pressure vessel, the steel plate has the advantages of low cost, high strength and toughness, the low yield ratio and high straightness, and the service safety of the steel plate for the low-temperature pressure vessel can be guaranteed.

The invention relates to the technical field of low-carbon microalloyed steel production, in particular to a high-efficiency rolled thin L450M pipeline steel plate and a manufacturing method thereof, the steel comprises the following chemical components in percentage by weight: 0.05%-0.07% of C, 0.10%-0.25% of Si, 1.45%-1.55% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.05%-0.06% of V, 0.05%-0.10% of Cr, 0.008%-0.020% of Ti, 0.015%-0.04% of Al, 0.005%-0.009% of N and the balance of Fe and inevitable impurities, and the total amount of impurity elements is less than 0.05%; the production process of the steel plate comprises the steps of molten steel smelting, external refining and degassing, continuous casting, casting blank heating, controlled rolling, controlled cooling and air cooling to the room temperature. The method is used for manufacturing the high-strength L450M hot-rolled steel plate for the oil pipeline with the thickness specification being 9-15 mm and the pipe diameter being phi 914 mm or below, the problems that the steel plate rolling efficiency is low, the rolling resistance is large, the steel plate performance uniformity and the plate shape are not easy to control and the like are solved, and the steel plate has the advantages of being low in cost, high in strength and toughness, high in strength, excellent in low-temperature toughness and the like.

The invention discloses gradient grain ultra-low carbon steel and a preparation method and application thereof. The preparation method comprises the following steps that S1, ultra-low carbon microalloyed steel is subjected to solution treatment and water cooling; s2, cutting the ultra-low carbon microalloyed steel subjected to water cooling, and removing a surface oxide layer to obtain a metal sample; and S3, after rolling treatment is conducted on the metal sample, the metal sample is put into a microwave high-temperature experiment furnace to be subjected to tempering treatment, rolling treatment and tempering treatment are repeated, and the total tempering duration does not exceed 2 h. The ultra-low carbon microalloyed steel with grain size gradient distribution is prepared by utilizing the wave-absorbing heating principle of a microwave high-temperature experimental furnace and combining with material surface micro-deformation.

The invention discloses low-cost RE and B microalloyed steel rail steel and a preparation method thereof. The low-cost RE and B micro-alloyed rail steel provided by the invention comprises the following chemical components in percentage by mass: 0.68-0.76% of C, 0.18-0.26% of B, 0.18-0.18% of C, 0.18- 0.35% to 0.60% of Si; 0.90 to 1.10% of Mn; p is less than or equal to 0.02%; s is less than or equal to 0.02%; 0.05 to 0.1 percent of V; b: 0.001 to 0.005% of the total weight of the raw materials; 0.002 to 0.01 percent of RE (rare earth); and the balance is Fe and impurities. The low-temperature impact performance can be improved by adding RE, and the B microalloy is added to replace Mo and Ni alloy contents, so that the hardenability of the steel is improved. The steel rail steel has good obdurability, the alloy manufacturing cost is reduced, and the market competitiveness is improved.

The invention relates to a method for controlling cracks of a low-cost niobium microalloyed steel casting blank, which belongs to the technical field of metallurgy and comprises the procedures of molten iron desulfurization, converter smelting, RH vacuum treatment and continuous casting. The total oxygen content in a casting blank is controlled to be smaller than or equal to 15 ppm; a soft reduction technology is adopted, reduction is completed within 90% of the two-phase region, and the soft reduction rate is larger than or equal to 1.0 mm / min and smaller than or equal to 1.5 mm / min; the continuous casting pulling speed is not less than 1.3 m / min, and the cooling rate is not more than 1.5 DEG C / s The weight content of each component in the niobium microalloyed steel satisfies that C is less than or equal to 0.07%, Mn / Sgt; and Al * N is less than or equal to 0.015 ppm. According to the method, control over the surface cracks of the niobium-containing microalloyed steel continuous casting billet is achieved through molten steel refining path optimization, molten steel low total oxygen content segregation control, continuous casting high-pulling-speed low-cooling-rate control, niobium microalloyed steel component optimization and the like.

The invention discloses a method for calibrating rare earth inclusions in a rare earth microalloyed steel high-temperature laser confocal experiment. The method comprises the following steps: (1) preparing and cutting a rare earth microalloyed steel plate to prepare a cylindrical sample, and pretreating the sample to obtain an experimental steel sample; (2) dividing the to-be-observed surface of the experimental steel sample into n areas and marking; (3) placing the marked experimental steel sample under a scanning electron microscope to observe inclusions; judging an area where the target rare earth inclusion is located according to the mark and determining coordinates of the area; and (4) the experimental steel sample is placed in a high-temperature laser confocal scanning laser microscope, the target rare earth inclusion is found according to the coordinates, and a heating-cooling program is started to melt the experimental steel sample to complete in-situ observation of the target rare earth inclusion. The method can solve the problem that an existing inclusion observation means cannot ensure that original inclusions and changes of the original inclusions cannot be observed when a high-temperature confocal experiment is carried out.

The invention discloses a wide and thin steel plate with excellent low-temperature toughness for a 355MPa-grade low-temperature engineering structure and a manufacturing method of the wide and thin steel plate, and belongs to the technical field of low-carbon microalloyed steel production. The steel plate comprises the following chemical components in percentage by weight: 0.05%-0.08% of C, 0.2%-0.25% of Si, 1.45%-1.55% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.02%-0.04% of Nb, 0.010%-0.04% of Al, 0.003%-0.006% of N and the balance of Fe and inevitable impurities, and the total amount of other impurity elements is less than 0.05%. The manufacturing method comprises the steps of molten steel smelting, external refining and degassing, continuous casting, slab reheating, rolling and controlled cooling. The steel plate is low in cost, high in strength and toughness and capable of meeting the service safety of the steel plate for the engineering structure under the condition of-60 DEG C.

The invention discloses a thin-gauge pipeline steel plate with low-temperature toughness stable control based on strain design and a manufacturing method of the thin-gauge pipeline steel plate, and belongs to the technical field of low-carbon microalloyed steel production. The method comprises the steps of molten steel smelting, external refining (LF refining), RH vacuum degassing, continuous casting, casting blank heating, controlled rolling, relaxation, heat compensation in a heat preservation box, cooling and air cooling to the room temperature. According to the invention, the low-temperature toughness stability control of the L450M pipeline steel plate for rolling the gas pipeline based on the strain design is realized, wherein the L450M pipeline steel plate is used for rolling the thin specification (9-13mm) and the pipe diameter of the gas pipeline is less than phi 1016mm.

The invention discloses a performance stability improving method based on titanium content and heating temperature cooperative control, and belongs to the technical field of hot continuous rolling steel production. The invention provides a performance stability improving method based on titanium content and heating temperature cooperative control in order to improve the performance stability of high-titanium-content titanium microalloyed steel. According to the method, different slab tapping temperatures and intermediate slab thicknesses are designed according to different Ti contents and finished product thicknesses, the rough / finish rolling temperature and the laminar cooling final cooling temperature are controlled at the same time, through cooperative control over components and the process, the influence of the high titanium content on steel performance fluctuation is avoided, mechanical property fluctuation of finished product steel is reduced, and the quality of the finished product steel is improved. And the fluctuation range of the yield strength and the tensile strength is within + / -30MPa.

The invention discloses a method for reducing the strength difference of titanium microalloying hot-rolled high-strength steel in the width direction, and belongs to the technical field of metallurgy. The titanium microalloyed hot-rolled high-strength steel is prepared according to the production technological processes of slab heating, rough rolling, finish rolling, laminar cooling and coiling. The tensile strength fluctuation range of the titanium microalloying hot-rolled high-strength steel in different positions in the plate width direction is not higher than 20 MPa. The method specifically comprises the following steps: a, fully heating a plate blank when the plate blank is heated, and ensuring that the temperature of each part of the plate blank is uniformly distributed; b, preserving heat of the plate blank before rough rolling, and ensuring complete recrystallization of austenite during rough rolling; c, carrying out heat preservation on the plate blank before finish rolling, and precisely controlling the temperature during finish rolling; d, laminar cooling to prevent water accumulation on the surface of the steel plate; and e, controlling the fluctuation range of the coiling temperature in the width direction to be not higher than 20 DEG C during coiling. The method can effectively solve the problems that the mechanical property fluctuation in the width direction of the titanium microalloyed steel is large, and the stability is poor.

The invention provides Nb microalloyed steel with good high-temperature corrosion resistance and a stacking-rotating-gradient cooling hot working method and application of the Nb microalloyed steel, and belongs to the technical field of metal hot working. The Nb microalloyed steel with good high-temperature corrosion resistance comprises the following chemical components in percentage by mass: 0.15 to 0.25 percent of C, 0.2 to 0.3 percent of Si, 0.5 to 0.6 percent of Mn, 0.02 to 0.03 percent of Ni, 0.015 to 0.03 percent of Cr, less than or equal to 0.0025 percent of S, less than or equal to 0.02 percent of P, less than or equal to 0.1 percent of Nb and the balance of Fe. According to the method, the stacking-rotating-gradient cooling hot working technology is adopted, and the Nb microalloying design is combined, so that remarkable refinement of crystal grains is achieved. According to the Nb microalloy low-carbon steel treated by the process, the average grain size of the original austenite can be controlled to be below 30 microns and is obviously reduced compared with that of the conventional process.

This invention discloses a niobium-vanadium-titanium microalloyed seamless steel pipe and its preparation method, belonging to the technical field of seamless steel pipes. The method includes the following steps: S1. Heating, piercing, rolling, and sizing the niobium-vanadium-titanium microalloyed steel pipe to obtain a billet; S2. Annealing and heat-treating the billet to obtain a heat-treated steel pipe; S3. Spraying a coating onto the surface of the heat-treated steel pipe to obtain the niobium-vanadium-titanium microalloyed seamless steel pipe. The niobium-vanadium-titanium microalloyed seamless steel pipe of this invention possesses excellent mechanical properties, meeting the requirements of high-strength operating environments; the surface of the niobium-vanadium-titanium microalloyed seamless steel pipe is corrosion-resistant, making it suitable for high-strength, highly corrosive environments.

Metal strip as an insert for decorative or sealing strips or as edge protection, especially for motor vehicles or control cabinets, which is provided with cut and / or punched openings, wherein the metal strip consists of micro-alloyed steel or multi-phase steel.

The invention discloses a method for improving the performance stability of titanium microalloyed steel, and belongs to the technical field of steelmaking. The method for improving the performance stability of the titanium microalloyed steel is provided for improving the mechanical performance stability of the titanium microalloyed steel, and the control precision of chemical components of the titanium microalloyed steel is optimized as follows: the content of C is + / -0.01%, the content of Si is + / -0.03%, the content of Mn is + / -0.05%, the content of Nb is + / -0.005%, the content of Ti is + / -0.005%, N is smaller than or equal to 0.0040%, and O is smaller than or equal to 0.0020%. And the working procedures of smelting, slab heating, controlled rolling and controlled cooling, coiling and slow cooling are optimized, so that the performance stability of the titanium microalloyed steel is remarkably improved, the proportion of the tensile strength fluctuation range of + / -30 MPa is not lower than 95%, and the yield is guaranteed.

This invention relates to an experimental method for detecting the high-temperature plasticity of the edges and corners of microalloyed steel billets, belonging to the technical field of steel process performance testing. The technical solution includes: Experiment A: high-temperature melting test of the billet; Experiment B: high-temperature plasticity test of the billet; Experiment C: bending and straightening plasticity test of the billet; measuring the fracture diameter of the tensile fracture specimen and calculating the reduction of area; based on the experimental results of Experiments B and C at different temperatures, plotting a comparison diagram of the high-temperature plasticity of the billet edges and corners with the test temperature as the X-axis and the reduction of area as the Y-axis, thereby accurately determining whether there is a brittle temperature range in the billet and its edges and corners, and analyzing the high-temperature plasticity of the billet edges and corners based on the experimental results. The beneficial effects of this invention are: simulating the process of rapid cooling and latent heat reheating of the billet edges and corners during actual production, plotting the high-temperature plasticity diagram of the billet edges and corners, accurately detecting and analyzing the high-temperature plasticity of the billet edges and corners, and confirming whether the low-temperature zone of the billet and its edges and corners will cause abnormalities due to excessively low plasticity.

The invention belongs to the technical field of automobile fastener production, and particularly relates to a preparation process of a high-strength screw for an automobile seat. According to the technology, Cr-Mo-Ni-based microalloyed steel is adopted, and a thin-sheet martensite structure containing 10%-15% of stable retained austenite is obtained through VIM-ESR ultra-clean smelting, planetary cross wedge rolling short-process hot working and Q-A-P-C heat treatment including quenching, isothermal deformation, graded isothermal treatment, deep cooling and double tempering. According to the high-safety and environment-friendly automobile seat screw and the manufacturing method thereof, gradient nitriding, the AlCrSiN nanometer multi-layer coating and the graphene hole sealing layer are matched, laser local destressing and lossless full-inspection control are supplemented, and the manufactured screw has the tensile strength larger than or equal to 1350 MPa, the low-temperature impact toughness larger than or equal to 35 J, the salt mist corrosion resistance larger than or equal to 1000 h, the excellent hydrogen embrittlement resistance and the excellent fatigue life, and the high-safety and environment-friendly manufacturing requirements of a new generation of automobile seats are met.

The invention discloses a method for evaluating the corrosion state of microorganisms in real time, high-strength steel and a preparation method. The method for evaluating the corrosion state of the microorganisms in real time comprises the following steps that a microalloyed steel test piece for monitoring is prepared; establishing a microbial corrosion environment: placing the test piece in a culture medium containing microbial flora to form an anaerobic corrosion environment; monitoring a resistance signal in real time: in the corrosion process, continuously measuring resistance values at the two ends of the test piece, and obtaining a resistance-time change curve; and analyzing the corrosion state: evaluating the corrosion stage and uniformity of the material according to the characteristics of the resistance-time change curve.

In order to solve the problems existing in the prior art, common hot rolled steel, carbon manganese steel and low-carbon microalloyed steel are creatively subjected to Al alloying, the difference of free energy of transformation from austenite to ferrite is reduced through addition of the Al element, the free energy is about 140 mol / J, and the content of the Al element in the hot rolled steel is greatly reduced. During thermal deformation, austenite is subjected to phase transformation to induce ferrite phase transformation, so that the difficulty is reduced, and the possibility of deformation-induced ferrite phase transformation is improved. Besides, a certain content of ferrite delta ferrite is obtained within the thermal deformation temperature range (1200-800 DEG C) by adding the Al element, the ferrite delta ferrite is expected to be recrystallized during thermal deformation, fine crystal grains are obtained, and refining of the whole structure is achieved.

The invention discloses a high-strength steel plate for a high-efficiency low-cost 690MPa-grade low-temperature engineering structure and a manufacturing method of the high-strength steel plate, and belongs to the technical field of low-carbon microalloyed steel production. Optimized steelmaking, heating, rolling, controlled cooling and straightening processes are adopted, and finally the problems of low toughness, high yield ratio, low flaw detection qualification rate and plate shape unevenness of the 690MPa-grade hot-rolled steel plate with the thickness of 10-40mm produced by an online cooling process are solved.

The invention provides a microalloy steel multi-mode mechanical property prediction method and device and a readable storage medium, and relates to the technical field of steel performance prediction. The method comprises the following steps: constructing and verifying a phase field model based on thermodynamics and phase field dynamics of a microalloyed steel system to obtain a phase field simulation microstructure image of microalloyed steel; alloy component data and heat treatment process data on a production line are collected, and phase field simulation microscopic structure images and mechanical property indexes corresponding to the alloy component data and the heat treatment process data are obtained; performing standardized preprocessing and sample construction on the phase field simulation microscopic structure image, the alloy component data, the heat treatment process data and the mechanical property indexes, and performing data set division; establishing a multi-modal deep learning model containing an image branch and a numerical branch; carrying out training, evaluation and hyper-parameter optimization based on the training set and the test set, and determining an optimal multi-modal deep learning model; and determining a mechanical property prediction result of the to-be-tested sample based on the optimal multi-modal deep learning model.

The invention discloses a high-strength steel plate for a high-efficiency low-cost 890MPa-grade low-temperature engineering structure and a manufacturing method of the high-strength steel plate, and belongs to the technical field of low-carbon microalloyed steel production. Optimized steelmaking, heating, rolling, pre-straightening, relaxation, controlled cooling and hot straightening processes are adopted, and finally the problems of low toughness, high yield ratio, low flaw detection qualification rate and plate shape unevenness of the 890MPa-grade hot-rolled steel plate with the thickness of 10-30mm produced by an online cooling process are solved.

The invention discloses a thin L450M pipeline steel plate based on strain design and a manufacturing method of the thin L450M pipeline steel plate, and belongs to the technical field of low-carbon microalloyed steel production. The steel comprises the following chemical components in percentage by weight: 0.05%-0.08% of C, 0.15%-0.25% of Si, 1.55%-1.70% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.02%-0.04% of Nb, 0.008%-0.020% of Ti, 0.015%-0.04% of Al, 0.15%-0.25% of Cr, 0.03%-0.06% of Mo, 0.003%-0.006% of N and the balance of Fe and inevitable impurities, and the total amount of other impurity elements is less than 0.05%. The manufacturing method comprises the steps of molten steel smelting, continuous casting, casting blank stacking and slow cooling, casting blank heating, controlled rolling, relaxation and cooling and air cooling to the room temperature. The steel plate has good toughness.

A metal band as an inlay for trim strips or sealing strips or as edge protection, in particular for motor vehicles or switch cabinets, said metal band being provided with cut and / or punched apertures, wherein the metal band consists of microalloyed steel or multiphase steel.