The National Grand Theater is made of titanium!

The use of titanium roofing buildings, began in 1973, the early gold-absorbing goddess society roof is located in Saga Prefecture, Oita Prefecture, Seki Town, an area of about 50 square meters, using titanium 0.4t; then use 0.3mm thick Shibuya Electric Power Hall plate 720 square meters; Kobe City, Suma Beach Aquarium floor area of 2,500 square meters, with 12t of titanium; Niigata Aquarium titanium 4.95t; Mito Museum of Fine Arts titanium 4.95t; Mie City Children's building area of 1,113 square meters, with titanium 7.5t; Kawasaki Public Gallery building area of 3,500 square meters, with 21t titanium world civilization light; Shizuoka Golden Dome, the teaching temple keel and the mountain wall herringbone plate, building area of 35,000 square meters of 90t, titanium; Fukuoka rotating open and closed dome, 210m in diameter, with a building area of 48,500 square meters, the Using 0.3mm 100t titanium plate;

Van Gogh Museum in Amsterdam, the Netherlands, using 0.5mm pure titanium 4.3t;

Hong Kong MTR Central Station, an area of 6500 square meters, using 0.4mm pure titanium.

In addition to roofing, there are building facades, curtain walls, suspended ceilings, barges, port facilities, bridges, tunnels, decorations, monuments, railroads, pipelines, and anti-corrosion coatings.

Officially opened in 1997, the specific structure and new materials with a strange and beautiful shape won the attention of the world media, known as the Guggenheim Museum of Art in Spain, "miracle", the amount of titanium up to 80 tons, has been known to domestic collectors. Caused the attention of countries around the world and in the construction, and began to use in the country.

1, why choose titanium for construction?

1.1 Titanium has good corrosion resistance. Can withstand urban pollution, acid rain, marine environment, industrial radiation, volcanic ash and other atmospheric conditions. It is especially suitable for marine climate environment and industrialized areas.

1.2 Titanium has a very low density of 4.5g/cm3, which is only 57% of steel, 50% of copper, and 1.7 times that of aluminum, but its strength is similar to that of steel. Therefore, titanium as a building component can greatly reduce the weight of the structure, facilitate transportation and installation, reduce the bearing capacity of the main structure, lower the center of gravity of the building, and improve the overall seismic capacity of the building. Building.

1.3 The coefficient of thermal expansion of titanium is 9.0*10-6/, which is about 50% of stainless steel and 30% of aluminum. It is similar to the coefficient of expansion of traditional building materials such as glass, concrete, brick, cement and stone. Suitable for fusion with traditional building materials. In construction, titanium can be used as a single unit without the need for expansion joints to compensate for thermal expansion and contraction.

1.4 The surface morphology of titanium can be obtained by shot blasting, sand blasting, and embossing. In addition, through the atmospheric oxidation method, anodic oxidation method, chemical oxidation method can make the surface of titanium change a variety of colors and patterns, to meet people's pursuit of art.

1.5 Titanium's corrosion resistance makes it unlike stainless steel and aluminum building materials, which can only be repaired and maintained after about ten years. Although the cost of titanium processing and installation is higher than stainless steel, but its long service life, from the point of view of long-term cost, titanium building materials is the most economical.

1.6 Easily processed into thin sheets, and not easily deformed, good welding performance. Standard metal forming tools, processing methods and techniques are suitable for shearing, molding, mechanical and titanium connections. Titanium materials can be connected using the universal TIG welding process, and the self-healing film of titanium materials can prevent the weld from being damaged.

1.7 Titanium is a silver-gray metal that retains its hue at room temperature. One of the important reasons why temples often choose titanium materials to make their roofs is also because titanium roofs give people the impression of antiquity, dignity and atmosphere. In addition, in recent years, some private buildings in Japan, such as houses, tea rooms, etc., also use titanium building materials, which are related to titanium gives people a noble, low-key, gentle, quiet impression.

1.8 Titanium is non-toxic, will not decompose metal ions into groundwater, can be 100% recycled, no pollution to the environment. The thermal conductivity of titanium is comparable to that of stainless steel. It is 1/20 of aluminum alloy and 1/8 of copper alloy. it has the function of maintaining the temperature of the building. Is a rare green material.

2, the application of titanium in China's construction field overview

Titanium in China's construction field is still in its infancy, titanium application in the construction industry is only 10 years. Although the time is not long, but the characteristics of titanium materials in China's construction industry has been played to the fullest.

The shell of the National Grand Theater consists of more than 18,000 titanium plates, covering an area of more than 30,000 square meters. only four of the 18,000 plates have the same shape. The titanium plates are treated with special oxidation treatment, their surface metallic luster is very textured, and their color remains unchanged for 15 years.

Since the mid-80's, although BaoShi Group has been producing some titanium models and sculptures, there is still a lack of masterpieces such as "Dolphin and Man". But since the National Grand Theatre led to the Hangzhou Grand Theatre, Hefei Grand Theatre building began to use a lot of titanium, it is disappointing that the titanium used in these buildings are basically imported from Japan, the Nippon Steel Corporation, Mitsubishi Chemical Corporation, Kobe Steel Company Limited, and did not use domestic titanium material processing enterprise products. In the face of such a large number of titanium construction, China's titanium processing enterprises but lost the first opportunity, which caused the titanium industry personnel to scrutinize.

Facing the booming titanium construction, China's titanium enterprises also feel the pressure. As the largest domestic titanium processing enterprises, Baoti Group has been actively committed to the development of titanium materials, and has achieved certain results in the production of large grain titanium gold plate. It is urgent to speed up the research and development of titanium building materials, develop titanium building materials varieties and reduce production costs.