2013年10月17日星期四

F-15 Eagle

Military tungsten alloy cube is usually consisted of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe. The most important property for tungsten alloy cube is that small volume with high density, which means it can be used as counterweight for F-15 Eagle.

The McDonnell Douglas (now Boeing) F-15 Eagle is a twin-engine, all-weather tactical fighter designed by McDonnell Douglas to gain and maintain air superiority in aerial combat. It is considered among the most successful modern fighters, with over 100 aerial combat victories with no losses in dogfights. Following reviews of proposals, the United States Air Force selected McDonnell Douglas' design in 1967 to meet the service's need for a dedicated air superiority fighter. The Eagle first flew in July 1972, and entered service in 1976.

F-35 Lightning II

Military tungsten alloy cube is usually consisted of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe. The most important property for tungsten alloy cube is that small volume with high density, which means it can be used as counterweight for F-35 Lightning II.
The Lockheed Martin F-35 Lightning II is a family of single-seat, single-engine, fifth-generation multirole fighters under development to perform ground attack, reconnaissance, and air defense missions with stealth capability. The F-35 has three main models; the F-35A is a conventional takeoff and landing variant, the F-35B is a short take-off and vertical-landing variant, and the F-35C is a carrier-based variant.

F/A-18 Hornet

Military tungsten alloy cube is usually consisted of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe. The most important property for tungsten alloy cube is that small volume with high density, which means it can be used as counterweight for F/A-18 Hornet.

The McDonnell Douglas (now Boeing) F/A-18 Hornet is a twin-engine supersonic, all-weather carrier-capable multirole fighter jet, designed to dogfight and attack ground targets (F/A designation for Fighter/Attack). Designed by McDonnell Douglas and Northrop, the F/A-18 was derived from the latter's YF-17 in the 1970s for use by the United States Navy and Marine Corps. The Hornet is also used by the air forces of several other nations. The U.S. Navy's Flight Demonstration Squadron, the Blue Angels has used the Hornet since 1986.

F-22

Military tungsten alloy cube is usually consisted of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe. The most important property for tungsten alloy cube is that small volume with high density, which means it can be used as counterweight for F-22.

The Lockheed Martin F-22 Raptor is a single-seat, twin-engine fifth-generation supermaneuverable fighter aircraft that uses stealth technology. It was designed primarily as an air superiority fighter, but has additional capabilities that include ground attack, electronic warfare, and signals intelligence roles. Lockheed Martin Aeronautics is the prime contractor and is responsible for the majority of the airframe, weapon systems and final assembly of the F-22. Program partner Boeing Defense, Space & Security provides the wings, aft fuselage, avionics integration, and training systems.

2013年9月12日星期四

Why Use Tungsten Alloy Shot?

High density, great hardness and resistance to high temperature make tungsten to be one of the most sought-after materials for shotgun pellets in shooting history. The density of tungsten alloy is about 18g/cm3, only gold, platinum, and a few other rare metals have a similar density. So tungsten alloy shot is denser than any other shot material, including lead, steel or bismuth. To understand how the density factors into performance, let’s look at two spheres about the same size, a golf ball and a ping-pong ball. The golf ball is far denser and will fly farther and hit harder. Now reduce that size down to two single No. 4 pellets, one steel and the other a tungsten alloy. Get the picture? The tungsten will fly farther, hit harder and penetrate deeper. That means more birds, farther out, with fewer cripples. Another unique property of tungsten is that it is non-toxic, it is friendly to the environment, so it is safe for people to handle and work with.

2012年4月25日星期三

Tungsten mine to be revived in challenge to China

An English mine last used when the nation was making armaments to defeat Hitler's forces will be revived to challenge China's grip on tungsten, one of the strategic metals at the heart of a deepening trade dispute with Europe and the United States.
Wolf Minerals Ltd. is developing a tungsten mine in Devon, in southwest England, 70 years after it was last extracted there. The Hemerdon site is the world's fourth-largest deposit and can produce about 3.5 percent of global demand for the metal, used to harden steel in ballistic missiles and in drill bits. China provides about 85 percent of worldwide supplies.
Tungsten was one of the metals cited when President Obama filed a complaint with the World Trade Organization on March 13 against Chinese supply curbs. Tungsten is a critical raw material, according to the European Union, and the British Geological Survey places it at the top of its supply-risk list of materials needed to maintain the United Kingdom's economy and lifestyle.
"A big element of what we are doing is providing a strategic supply to companies outside of China," Wolf Managing Director Humphrey Hale said in an interview in London. "We're answering a requirement from the market, which is strategic supply, and prices are at a position where we can make money from that."
Wolf is backed by Resource Capital Funds, which holds a 17 percent stake, and Traxys SA, with 9.6 percent. Resource Capital is the largest shareholder in Molycorp, owner of the biggest U.S. rare-earth deposit. Traxys, the Luxembourg metals trader, also owns a stake in Molycorp.
China has imposed export restraints on raw materials including rare earths, tungsten and molybdenum, causing worldwide supplies to plummet, sending prices higher and threatening strategic stockpiles. China is the largest supplier of 28 of the 52 elements on the Geological Survey's risk list.
Rare earths became a political and legislative flash point in July 2010 when China moved to limit domestic output and slash export quotas by 40 percent, souring ties with the United States and Japan, where buyers cut use after prices soared in the first half of 2011. China said on Dec. 28 it was leaving overseas sales caps for 2012 virtually unchanged.
Tungsten prices will probably stay at more than $40,000 per metric ton this year because of China's curbs, Malaga, a producer of the metal in Peru, said in January. The price of ammonium paratungstate, the traded form of the metal, increased 32 percent in 2011 to end the year at more than $440 per metric ton, according to European price data from Metal Bulletin. The material traded at less than $65 in 2003.
"Investors should really look at Tungsten," John Meyer, an analyst at Fairfax IS PLC, said in an interview on Bloomberg Television March 28. "Demand is so far ahead of supply, I think it's the key commodity, a strategic commodity."
Wolf's mine will produce 3,500 tons of tungsten and 450 tons of tin a year, starting in 2015. It will cost about $190 million to build.
The Devon mine, which provided material used in both World Wars, was closed in 1944 as access to overseas supplies resumed. Wolf isn't the first company to attempt to revive it.
Amax started efforts to develop the mine in the 1970s and was granted approval for the project by Devon's local government in 1986. Amax withdrew from the project in 1993 because of falling commodity prices.

2012年4月23日星期一

Chinese Tungsten Production Influences National Defense


China is a big country of producing tungsten.Tungsten reserve in China accounted for about 70 percent of the world's total reserves of tungsten.The output of tungsten in China accounts for 80% of the world's total output.


Tungsten  is a kind of rare metal with highest melting point and density.The hardness of tungsten is after diamond. It is known as "industrial teeth" and"industrial salt".Nowadays, tungsten is widely used in national defense industry, aerospace,machinery manufacturing, oil drilling, special steel, new material, etc.Aviation jet engines,rockets,missiles, satellites and many parts are made of tungsten alloy.As important strategic resource, tungsten industry has a close relationship with national economy and  national defense.