Polysilicon prices will continue to rise steadily
Li Shengmao, a senior research fellow at China Investment Consulting Co., Ltd., pointed out that in recent years, the price of polysilicon on the domestic and foreign markets has fluctuate greatly, which is directly related to the changes in demand of the downstream solar photovoltaic cell industry. Because the solar photovoltaic industry is an emerging industry, its market competitiveness is still very weak, so the industry is very dependent on the government's subsidy policy, and it is more relevant to the overall macroeconomic trend. It should be said that the recent increase in demand for the polysilicon industry is directly related to the stabilization and recovery of the world’s macroeconomics.
Li Shengmao believes that the recent spot price of polysilicon has risen significantly, and in fact it is more of a recoverable rise. Affected by the international financial crisis, the increase in installed capacity of the world's photovoltaic power generation industry fell sharply in 2009, which directly led to a sharp decrease in the demand for polysilicon by solar cell manufacturers. The market price of polysilicon dropped sharply under this background. . Since 2010, with the improvement of the world economic situation, the prosperity of the photovoltaic industry has rapidly increased. This has brought about a recovery of the market's demand for polysilicon, and its market price has risen dramatically.
The price of polysilicon in the spot market has risen sharply. There are also some artificial speculation factors. The “2010-2015 China Solar Photovoltaic Power Industry Investment Analysis and Forecast Report†released recently by the China Investment Advisor pointed out that most of the sales of polysilicon manufacturers at home and abroad were completed through the signing of long-term supply agreements with downstream manufacturers. The long-term agreement to a large extent has a long-term role in locking product prices, so the price of polysilicon spot market soared in such a short period of time, apparently caused by changes in the supply and demand relationship in the spot market, due to the inflow into the spot market. The total amount of polysilicon is not large, so it is very easy for some investors to hype.
Li Shengmao stressed that the possibility of a slowdown in the price of polysilicon in the country is likely to slow in the future. From the aspect of supply, at present, many polysilicon production lines in China have to be completed and put into production in the second half of 2010, which will result in the centralized release of polysilicon production capacity in the domestic market. In the case of abundant supply of polysilicon in the market, it is clear that the price of polysilicon continues to rise sharply. Necessary support.
From the aspect of demand, on the one hand, companies with large amounts of silicon will have fixed supply channels, and most of them will sign long-term supply agreements. Therefore, it is unlikely that this part of the company will switch to the spot market to purchase polysilicon. In addition, due to the recent increase in the price of polysilicon on the market, some solar cell manufacturers have started to increase their polysilicon inventories. For some time in the future, this part of companies will not have too much demand for polysilicon.
Forging is a workpiece or blank obtained by forging and deforming metal billets. The mechanical properties of the metal billet can be changed by applying pressure to the metal billet. According to the temperature of the billet during processing, the forging can be divided into cold forging warm forging and hot forging. Cold forging is usually done at room temperature, and hot forging is done at a recrystallization temperature higher than that of a metal blank.
The loose of metal can be eliminated by forging. Holes are made to improve the mechanical properties of the forgings.
Usage:
1, general industrial forgings refer to the civil industry, such as machine tool manufacturing, agricultural machinery, farm implements manufacturing and bearing industry.
2, forgings for hydrogenerators, such as main shaft and intermediate shaft.
3, forgings for thermal power stations, such as rotors, impellers, retaining rings, etc.
4, metallurgical machinery, such as cold roll, hot roll and herringbone gear shaft.
5, forgings for pressure vessels, such as cylinders, ring flanges and heads.
6, marine forgings, such as crankshaft, tail shaft, rudder rod, thrust shaft and intermediate shaft.
7, forging and pressing machinery and equipment, such as hammer head, hammer bar, hydraulic press column, cylinder body, wheel shaft press mounting machine's prop and cylinder body, etc.
8, modular forging is mainly used for forging dies for hot forging hammer.
9, automotive industry forgings, such as left, right steering knuckle, front beam, coupler, etc., according to statistics, in automobile, forging parts account for 80% of its quality.
10, forgings for locomotives, such as axles, wheels, leaf springs, crankshafts of locomotives, etc., according to statistics, the forging parts in locomotives account for 60% of their quality.
11, forgings for military industry, such as gun barrel, door body, breech bracket and traction ring, etc., according to statistics, forging parts account for 65% of the quality of tanks.
Characteristic:
1, the weight range is large. The forgings are small to several grams to hundreds of tons.
2, the quality of the casting is higher than that of the casting. The mechanical properties of the forgings are better than those of the castings, which can bear large impact forces and other heavy loads. Therefore, any important and large force parts are used forgings. For high carbides steel, forging is better than rolled steel. For example, high speed steel rolling material (or forging material) can be used only after forging. In particular, the high speed steel milling cutter must be changed.
3, the weight is the lightest. Under the premise of ensuring the strength of the design, the weight of the forgings is lighter than the weight of the castings. This reduces the weight of the machine itself. It is of great significance for the vehicles, aircraft, vehicles and characters.
4, save the raw materials. For example, the crankshaft of the static heavy 17kg used in the car is 189% of the weight of the crankshaft when the rolling material is forged. While the die forging is used, the chip is only 30%, and the machining time is also shortened by 1/6.
Precision forging can not only save more raw materials, but also save more machining hours.
5, high productivity. For example, the use of two hot die forging press forging radial thrust bearings, can replace 30 automatic cutting machine tools. When the M24 nut is produced by the top forging automaton, the productivity of the six axis automatic lathe is 17.5 times.
6, free forging is very flexible. Therefore, forging technology is widely used in some factories to produce various accessories.
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