Featured Articles

What are the key points to consider when establishing a mineral warehouse on the coast of Nigeria?

-
图片
👉 Project location: Nigerian coast 👉 Project type: Mine warehouse (span 100 metres, length 125 metres) 1. Structural Design  Span and Length:  The mine warehouse has a span of 100 metres and a length of 125 metres, employing a large-span steel structure design to ensure structural stability and load-bearing capacity.  It is recommended to use a steel truss structure or space frame structure to meet the large-span requirements and optimise material usage.  The structural design must consider wind loads, seismic loads, and dynamic loads during the operation of the bucket wheel excavator. Foundation Design:  Since the project is located by the sea, the foundation may be relatively soft. It is recommended to use deep foundation design (such as pile foundations) to ensure structural stability.  Foundation construction must consider the impact of groundwater levels and saline-alkali environments, and foundation reinforcement should be carried out when necessa...
发表评论

Influence of different elements on steel properties

-

 

steel structure
steel

(1) Carbon: the higher the carbon content, the higher the hardness of the steel, but its plasticity and toughness is worse.

(2) Manganese: can improve the strength of steel, can weaken and eliminate the adverse effects of sulfur, and can improve the hardenability of steel, high manganese content of high alloy steel (high manganese steel) has good wear resistance and other physical properties.

(3) sulfur: a harmful impurity in steel, steel containing high sulfur at high temperatures for pressure processing, easily brittle, usually called thermal embrittlement.

(4) phosphorus: can make the plasticity and toughness of steel decreased significantly, especially at low temperatures is more serious, this phenomenon is called cold embrittlement. In high-quality steel, sulfur and phosphorus should be strictly controlled. But on the other hand, in the low carbon steel containing high sulfur and phosphorus, can make its cutting easy to break, to improve the cutability of steel is favorable.

(5) silicon: it can progress the hardness of steel, but plasticity and toughness decline, electrical steel containing a certain amount of silicon, can improve the soft magnetic properties.

(6) molybdenum: can significantly improve the hardenability and thermal strength of steel, to prevent tempering brittleness.

(7) tungsten: can improve the red hardness and thermal strength of steel, and can improve the wear resistance of steel.

(8) chromium: can improve the hardenability and wear resistance of steel, can improve the corrosion resistance of steel and oxidation resistance.

(9) titanium: can refine the grain organization of steel, thereby improving the strength and toughness of steel. In stainless steel, titanium can eliminate or reduce intergranular corrosion of steel.

(10) boron: when the steel contains traces of (0.001-0.005%) boron, steel hardenability can be doubled.

(11) nickel: can improve the strength and toughness of steel, hardenability. When the content is high, it can significantly change some of the physical properties of steel and alloys, and improve the corrosion resistance of steel.

(12) aluminum: can refine the grain organization of steel, inhibit the aging of mild steel. Progress in low-temperature steel toughness, but also to improve the oxidation resistance of steel, steel wear resistance and fatigue strength.

(13) vanadium: can refine the grain organization of steel, steel strength, toughness and wear resistance. When it melts into the austenite at high temperatures, it can increase the hardenability of steel; conversely, when it exists in the form of carbide, it will reduce its hardenability.

(14) copper: its prominent role is to improve the atmospheric corrosion resistance of ordinary low alloy steel, especially when used in conjunction with phosphorus is more obvious.

评论

发表评论

此博客中的热门博文

What Are The Architectural Features Of The Space Frame Fabrication?

-
图片
What Are The Architectural Features Of The Space Frame Fabrication? Buildings processed by space frame   are a good form of construction, because the materials used are mainly metal, which have better toughness than other materials. This will not only help enhance the load-bearing capacity of the building itself, but also shorten the construction period. To reduce the difficulty of construction, let's talk about the characteristics of space frame   production   buildings： space frame 1. The   components of space   frame has good mechanical properties, and its stiffness and overall stability are better than those of general planar structures. 2. The space frame   structure has certain regularity and is convenient for construction. There are a   large number of same form components and nodes in the space frame   structure, which brings convenience to factory production and structural installation, ensu res   the quality of the project, acceler...
阅读全文

Strength and stability analysis of grid steel structures

-
图片
 The strength problem of space frame steel structure refers to whether the maximum stress (or internal force) caused by the load of the structure or a single component exceeds the ultimate strength of the building material in a stable equilibrium state, so it is a stress problem. The value of ultimate strength depends on the characteristics of the material. For brittle materials such as concrete, its maximum strength can be taken, and for steel, its yield point is often taken.            The stability problem is different from the strength problem. It is mainly to find the unstable equilibrium state between the external load and the internal resistance of the structure, that is, the state where deformation begins to increase rapidly, so as to try to avoid entering this state. Therefore, it is a deformation problem. For example, for axial compression columns, due to instability and lateral deflection, a large amount of bending moment is added to the c...
阅读全文

The development status of the space frame structure

-
图片
The development status of the space frame structure space frame   structure has been developed greatly in the last 30 years, and has been widely used inside and outside. space frame   structure plan arrangement is flexible, space shape is beautiful, convenient for building shape processing and decoration, decoration, can adapt to different span, different plane shape, different support conditions, different functional needs of the building.   Especially in the roof structure of large and medium span, the space frame   structure shows its superiority and is used in large number of large sports buildings, public buildings, industrial buildings, and also widely used in the roof of some small buildings, such as gas stations, toll stations, large canopies. In recent years, with the wide application of electronic computers and the development of computing technology, the design efficiency of the space   frame structure has been greatly improved. The construction and i...
阅读全文