The performance of steel plates, what are the models of high strength steel plates

Weathering steel plate]**: 15261682222 company provides deep processing of weathering steel plate, such as carving, hollowing, carving, bending, etc. There are also weathering board garden landscape decoration processing, such as weathering steel manufacturers, weathering steel screens, weathering steel modeling, weathering steel landscape wall production, weathering steel plate carving, weathering steel landscape wall, weathering steel landscape wall, weathering steel plate landscape wall rust steel plate, red rust steel plate, weathering plate, weathering plate, weathering steel plate, ND steel, rust plate, rust plate, weathering steel photovoltaic bracket, etc.

Weathering steel, that is, atmospheric corrosion resistant steel, is a series of low-alloy steel between ordinary steel and stainless steel, weathering steel is made of ordinary carbon steel with a small amount of copper, nickel and other corrosion-resistant elements, with the strength of high-quality steel, plastic duction, forming, welding, abrasion, high temperature, fatigue resistance, etc.

Characteristic; The weather resistance is 2 8 times that of ordinary carbon steel, and the paintability is twice that of ordinary carbon steel. At the same time, it has the characteristics of rust resistance, corrosion resistance, life extension, thinning and consumption reduction, labor saving and energy saving. Weathering steel is mainly used in steel structures that are exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers.

It is used in the manufacture of containers, railway vehicles, oil derricks, port buildings, oil production platforms and containers containing hydrogen sulfide corrosive media in chemical and petroleum equipment.

It can be a manufacturer that can cut and shape according to customer drawings, natural rust and other businesses, as well as steel processing, engineering production, logistics and distribution.

Our factory has a good cooperative relationship with major domestic steel mills. Main business; Weathering steel, rust steel plate, rust plate, red rust steel plate, rust red steel plate, landscape decoration red steel plate and other wholesale and retail, our company also provides customers with shear distribution and other services.

Because we are professional, but also because we work hard, so users can rest assured and more satisfied. All staff are looking forward to your presence and cooperation and common development.

Alloy steel. With the development of science and technology and industry, higher requirements have been put forward for materials, such as higher strength, high temperature, high pressure, low temperature, corrosion resistance, wear resistance and other special physical and chemical properties.

The performance of carbon steel mainly has the following shortcomings:

1) Low hardenability. Under normal circumstances, the maximum quenching diameter of carbon steel water quenching is only 10mm-20mm.

2) Low strength and yield ratio. For example, the S of ordinary carbon steel Q235 steel is 235MPa, while the S of low-alloy structural steel 16MN is more than 360MPa. The s b of 40 steel is only, which is much lower than that of alloy steel.

3) Poor tempering stability. Due to the poor tempering stability, when carbon steel is quenched and tempered, in order to ensure higher strength, a lower tempering temperature needs to be used, so that the toughness of the steel is low; In order to ensure good toughness, the strength is low when the tempering temperature is high, so the comprehensive mechanical properties of carbon steel are not high.

4) Unable to meet the requirements of special performance. Carbon steel is often poor in oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, etc., and cannot meet the needs of special use performance.

Steel plate is a commonly used building material product in our construction industry, among which high-strength steel plate is often used in power station equipment, mining machinery and bridges and other buildings with high-quality performance and comprehensive force. However, many people don't know much about high-strength steel plates, so what are the models of high-strength steel plates? How to choose steel?

What are the models of high-strength steel plates:

High-strength steel plates are divided into Q390, Q420, Q460, Q550, and Q690 models, which have the characteristics of high strength and strong welding performance, so they are often used in various large weldments. However, the microalloying elements contained in different types of steel plates are different, and the higher the microalloy content, the greater the strength of the steel, and thus the carbon content in the steel will also increase.

How to choose steel?

1. First of all, when buying steel, it is necessary to see whether the steel is folded, that is, there are many folds on the longitudinal surface of the steel, and these folds are mainly due to the fact that the manufacturer in order to pursue efficiency, the amount of pressure is too large to produce ears, so that it will be formed when rolling in the next process, and this steel is easy to crack and break in use.

2. Secondly, when purchasing steel, it is necessary to see whether there is a hemp surface on the surface of the steel, if there is, it means that the steel is of inferior quality, because the manufacturer uses excessive rolling groove rolling in order to reduce costs. In addition, if there is scarring on the surface of the steel, it is not recommended to buy it, mainly because the steel material content is not pure, or the manufacturer's production equipment is inferior, and it is easy to stick to the steel, which causes the scarring phenomenon after the roll.

3. Finally, when purchasing steel, we should also pay attention to the cracks on the surface of the steel, and the reasons for the formation of cracks are mostly due to the use of porous adobe in the manufacture of the manufacturer, coupled with the effect of thermal expansion and cold contraction, so that the rolled steel has a large leakage crack.

Summary: The above is the introduction of high-strength steel plate models and how to buy steel related content, I hope to help friends in need, if you need to know more about related knowledge in the later stage, welcome to pay attention to Qeeka Home.

25% of the weight of the car is in the body, and the weight of the body material is very important. In the 90s of the 20th century, 35 major iron and steel companies around the world cooperated to complete the project of "ULSAB Ultra Light Steel Auto Body". The research results of this project show that 90% of the body steel plate is used in the mass production of high-strength steel plates (including high-strength, ultra-high-strength and sandwich weight-reducing steel plates), which can achieve a 25% weight reduction of the body without increasing the cost (taking the 4-door car as a reference), and the static torsional stiffness is increased by 80%, the static bending stiffness is increased by 52%, and the structural modulus of the first body is increased by 58%, which meets all the requirements of collision regulations.

Of course, this is still the result of research, and the practical application of high-strength steel plates on the car body has not yet reached such a high level. On the basis of ordinary IF steel plates, high-strength IF steel plates and bake-hardened IF steel plates have been developed successively, which have improved the strength and anti-denting properties while maintaining high formability, and created conditions for the thinning and lightweight realization of body steel plates.

The tensile strength of the precipitated reinforced steel plate with Ti, NB and V elements is 500 750MPa, which can be used for wheels and other chassis parts.

Recently developed multiphase steels have considerable application potential. Among them, the strength grade of ferritic bainite steel is 500MPa, the strength grade of duplex (DP) steel and phase change-induced plasticity (trip) steel is 600 800MPa, and the strength grade of complex phase (CP) steel is 1000MPa or higher. The formability of these steels is also very good.

Japan's Nissan Changrang Automobile Company carried out a thorough research on the application of 590MPa grade high-strength steel plate on the car body, they selected TRIP steel and DP steel bare plate and DP steel galvanized sheet, and used finite element analysis technology to solve the problem of stamping cracking and rebound, optimized the welding process parameters, through the actual vehicle detection, the stiffness and crash performance meet the requirements, and the weight is reduced by 10kg compared with the use of 440MPa grade steel plate.

Tailored blank is a newly developed and applied steel plate lightweight technology. In the aforementioned ULSAB body, 18 parts are equipped with this technology.

Hello, 1. The composition is different: the main components of ordinary steel are iron and carbon, which is called iron-carbon alloy. The iron-carbon alloy containing less than 2% carbon is called steel, and the full name of carbon steel is carbon steel, which is divided into ordinary carbon steel and high-quality carbon steel according to quality; Manganese steel is smelted by adding metal manganese to carbon steel.

2. Different performance characteristics: ordinary steel materials have good comprehensive mechanical properties and stable quality; Manganese metal can effectively improve the comprehensive properties of steel, and after heat treatment, manganese Sun steel can have higher hardness and higher toughness at the same time. Commonly used manganese steels are alloy structural steel and spring steel.

3. Different applications: carbon steel general engineering structure and ordinary mechanical parts. For example, Q235 can make bolts, nuts, pins, hooks and less important mechanical parts, as well as rebar and section steel in building structures; At present, manganese steel is used in large quantities to make steel mills, ball bearings, buckets of bulldozers and excavators, and other components that are often abrased, as well as railroad tracks and bridges.

Summary. Hello, the seven strengthening methods of steel plate are deformation strengthening, solution strengthening, desolubilization strengthening, refinement grain strengthening, composite strengthening, martensitic strengthening, deformation and phase transformation comprehensive strengthening, in low-carbon, medium-carbon or high-carbon low-alloy steel (or high-alloy steel), the use of supersaturated carbon and niobium, vanadium, titanium, molybdenum, tungsten, chromium and other alloying elements, in the process of steel desolubilization carbide precipitation leads to strengthening. For example, in low-carbon engineering structural steel, carbon mechanical structural steel and high-carbon tool steel, the strong hardening of carbide desolubilization.

Hello, the seven strengthening methods of steel plate are Xingzhou wood change strengthening, solid solution strengthening, desolubilization strengthening, refined grain strengthening, composite strengthening, martensitic strengthening, deformation phase change comprehensive strengthening, in low-carbon, medium-respectful bond carbon or high-carbon low-alloy steel (or high-alloy steel), the use of supersaturated carbon and niobium, vanadium, titanium, molybdenum, tungsten, chromium and other alloying elements, in the process of steel desolubilization carbide precipitation leads to bright strengthening. For example, in low-carbon engineering structural steel, carbon mechanical structural steel and high-carbon tool steel, the strong hardening of carbide desolubilization.

Hello, in the micro-carbon ("high-alloy steel, such as martensitic aging steel, it is the use of solid solution dismantling and dismantling replacement alloying elements nickel, molybdenum, titanium, copper, etc., in the process of desolubilization, the precipitation of intermetallic hall stool jujube complexes resulting in strong coarse crystallization. In iron-based alloys, the equilibrium phase in the late stage of desolubilization is carbide or intermetallic.

Among the decoration materials, steel plates are widely used. However, what are the differences between weathering steel plate and steel plate? Let's take you to understand the next ruler.

First, the steel plate is not rusty stage, the naked eye can not distinguish between the first weathering steel plate and the ordinary hot-rolled steel plate, you need to refer to the quality assurance of the steel mill, the warranty letter as far as possible requires the first merchant to provide the original with the red seal of the steel mill, so as to avoid the merchant to inferior good. **The common materials of weathering steel are 09cupcrnia, B480gnqr, etc. of Baosteel or Anshan Iron and Steel, and the materials of ordinary hot-rolled steel plates are Q235B, SPHC, etc.

This method can be used at any stage of providing a sample to a professional third-party inspection and inspection agency to detect whether the metal composition matches the warranty certificate.

Second, the first stage of steel plate rust (outdoor 1-3 months), the first weathering steel began to grow small rust points, and the rust points of ordinary steel silver trapped plates were relatively loose, and some of the rust treatment was poor, and even rust peeled off.

3. In the second stage of long rust of the steel plate (4-8 months outdoors), the weather-resistant steel plate has less rust water, and the rust points are smaller and thicker; The rust water of ordinary steel plate is relatively large, and the rust point is large and thin; The rust column and tear stains of ordinary steel plates are more serious, and there are signs of blackening at the bottom of the workpiece.