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Why Does The Tempered Glass Have A Certain Rate Of Blasting?
Jun 09, 2017

Why does the Tempered Glass have a certain rate of blasting?
 First, the Tempered Glass blew and its classification
    1, Tempered Glass blew the classification of glass was born with the beginning, accompanied by self-explosion asked. Tempered Glass blew can be expressed as the phenomenon of automatic cracking of Tempered Glass in the absence of external direct effects. In the steel processing, storage, transportation, installation, use and other processes can occur during the glass blew. (NIS), which is caused by the visible defects in the glass, such as stones, sand, bubbles, inclusions, gaps, scratches, Impurities and heterogeneous particles cause Tempered Glass blew.
    2, uncontrollable glass blew from the characteristics of Tempered Glass cause bleak problem, the responsibility is difficult to understand. Blew time is not certain, may be just baked, it may be shipped from 1 to 2 months, there are 1 to 2 years before leaving the factory blew, causing the glass more blew the time may be finished after the production of 4 to 5 years The According to incomplete understanding, the probability of most manufacturers of products is about 3 ‰ blew rate; individual manufacturers may even higher probability of the product. Tempered Glass blew the root cause is because the glass contains nickel sulfide and heterogeneous particles of impurities, impurities are mixed? It is not yet clear to find out how the glass is mixed with nickel, the largest possible source is the use of equipment on a variety of nickel-containing components and the use of various heat-resistant alloys furnace. For the melting of the furnace, has been reported in the small furnace found in nickel-rich coagulation. Sulfur is undoubtedly derived from the ingredients in the mix and the sulfur content of the fuel. When the temperature exceeds 1000 ° C, nickel sulfide is present in the molten glass in the form of droplets, and the curing temperature of these small droplets is 797 ° C. 1 gram of nickel sulfide can produce about 1000 small diameter of 0.15 mm small stones. Nickel sulfide can occur at any time after the completion of production, so it can not be completely eliminated, so far no effective way to prevent it as "glass curtain wall cancer." "Glass curtain wall cancer" by the famous architect Foster's mouth: that year, by the London office designed by the London City Hall block from the floor to the ceiling height of the glass rupture. The town hall is close to the Tower Bridge in London, all covered with glass, and the contractor has to start checking all the internal glass. A spokesman for the Greater London City Council said that according to preliminary investigations, the problem was that the glass contained nickel sulfide, that is, during the construction of the glass was contaminated with nickel, nickel and glass sulfide chemical reaction, causing rupture. Nickel sulfide after the explosion is difficult to replace, high processing costs, and will be accompanied by greater quality complaints and economic losses, resulting in the owners of the dissatisfaction or even more serious other consequences. Called "glass curtain wall cancer".
 Second, the Tempered Glass blasting rate and the reasons for blew
    1, the rate of self-blasting rate of the country's self-blasting rate of the manufacturers are not consistent, ranging from 3% to 0.3%. The general rate of self-blasting is calculated on the basis of the number of pieces, without considering the size of single-chip glass and glass thickness, so not accurate enough, can not be more scientific comparison with each other. In order to uniformly calculate the rate of self-explosion, it is necessary to determine the uniform hypothesis. Set a uniform condition: every 5 to 8 tons of glass containing a sufficient to cause bleed nickel sulfide; each piece of Tempered Glass area of 1.8mm; nickel sulfide evenly distributed. The calculated blasting rate of 6mm thick Tempered Glass is 0.64% ~ 0.54%, that is, 6mm Tempered Glass is about 3 ‰ ~ 5 ‰. This is consistent with the actual value of domestic high-level processing enterprises. Even if the production by standard, can not completely avoid the Tempered Glass blew. Large buildings will be easy to use hundreds of tons of glass, which means that the glass nickel and heterogeneous impurities in the existence of a large rate, so although the hot-rolled glass, the blew is still inevitable.