Currently, there is only less than a month before the referendum for withdrawing from the European Union of Britain. The EU is an economic-political union of 28 member states that are located primarily in Europe. Every country maintains a positive attitude to this referendum, and the majority of investors believe that the chance to withdraw from the EU of Britain is small. Since British Prime Minister David Cameron announced that referendum would  be held in June 23, the pound has been in a state of sharp fluctuations, showing that the event is bound to bring about a crisis for the international economy. So if Britain really withdraws from the European Union, will it have any effect to China. The following are briefly discussions.

Firstly, the European debt crisis that broke out before has brought a great impact to China's economy, however, if Britain whose economic trends is better decides to draw out EU at present, which is bound to hamper the recovery of EU economy, even it can lead to the setback of EU economic. In this situation, EU will want to take a more protectionist policy in international trade, which would hinder bilateral trade between China and the EU countries. Thereby impeding the export of tungsten heater to European countries.

Secondly, if Britain withdraws from EU, Britain cannot be constrained by many policies of this organization, and then the related research on high technology of Britain will be unhindered flow into China. Therefore, it would hit many domestic related industries, which will have a negative impact on the development of related businesses in China. And some enterprises which produce tungsten heater may be eliminated because of the backward technology. On the other hand, the pound may depreciate because of the exit, while in the process of RMB internationalization is accelerating, which will lead to the foreign exchange market turbulence.

Recently, famous Chinese scientist Yang Shaoqing ammunition invited in the CCTV program for the audience of a presentation mysterious "Tank Terminator" – terminal sensitive projectile. Terminal sensitive projectile is also called as sensor detonated ammunition, which is a new kind of anti-armor weapon developed in 1970s. It can detect the presence of a target terminal ballistics, and can make warhead explosion direction towards the goal, mainly for autonomous attack armored vehicles top armor, it has long distance, high hit rate, good penetration effect in the 21st century information battlefield.

TSP is composed of major shells and propellant charge composition. Major missile includes elastomers, time fuze, projectile structure, end-sensitized bullets. And the end-sensitized bullet consists of save spin and steady deceleration scanning systems, sensor systems, central controller, advanced warhead, power, etc. Wherein the central controller is equivalent sensitivity projectile brain centers, its main role is to drive control, data acquisition, signal conversion and fire decision-making. But the final damage caused to the target is the EFP warhead. EFP- Explosively-Formed Projectile, heat liner formed by long thin jet of metal armor, except that after the EFP warhead explosion, shaped charge liner crushed deformed, forming a stout and dense penetrator pills, which speeds up about 2000 m/s, less than the shaped charge jet velocity (8000 m/s), the jet penetration is deeper.

TSP self-forging fragment warhead usually uses heavy metals to fabricate metal liner, which requires good ductility, high density and a reasonable price. From the properties, gold and rhenium is appropriate, but they cost a lot; although depleted uranium armor can meet the requirements, it still radioactive and many countries oppose to use. So copper used widely in liner in early days. Today, tantalum and tungsten copper liner is two main types of liner materials. Tungsten copper shaped charge jet of tungsten have a higher head speed at the time of penetrating armor can shorten the time through, thereby facilitating against reactive armor. But its crisp texture and poor powder adhesion, good ductility copper added contribute to its shape, so the stability of the jet improved and prevent from breaking.

In recent years, with the rapid development of the network, foreign trade in China has also increase, considering that the comprehensive utilization of both domestic and foreign markets and resources, since January 1, 2016, China has made some adjustments for the relevant economy policy on foreign trade. 

Recent years, due to mechanization and intelligent technology developments, tungsten carbide products used for drilling has a rapid development. The main trends include the following: ultra-fine or nano structure tungsten carbide, high-temperature powder based tungsten carbide, functionally gradient carbide, carbide modified binder, double bonded carbide and WC-Co-diamond three phase composite hard materials and so on.

1. Ultra-fine or nano structure tungsten carbide button: It is one of the hotspot recently. In the early 1990s, related researchers began to focus on grain refining preparing submicron ultrafine and nano-structured carbide launched a study. This is owing to with the continuous grain refinement, the density, the hardness, the toughness and the wear resistance of tungsten carbide materials will be remarkably improved. At the same time drilling equipment for drilling requirements are also getting higher and higher, especially high-pressure drilling of wear resistance and toughness carbide button have strict requirements, and ultrafine grain cemented carbide can fully meet its performance.

2. High-temperature powder based tungsten carbide button: It is one kinds of new process that high-temperature reducing raw material powder and high temperature carbonization, which the preparation of WC powder has integrity, high strength and high energy storage. Compared with conventional vacuum heat treatment, average footage carbide button ratio increased by 50%, drilling speed of nearly 100%, with an average increase of about 100% abrasion resistance, product quality and stability and service life have been greatly improved.

3. Functionally Gradient carbide buttons: In sintering or heat treatment process through the appropriate climate-induced diffusion in the alloy C, and through a chemical reaction so that other members rearrangement and distribution, leading to changes in alloy composition and structure along a certain direction, forming a gradient structure, different parts with different functions. Functionally Gradient carbide buttons usually low carbon alloy carburizing process (pass into CH4, CO and other carbon-containing gas) method of extraction, the treated W and Co ball distribution in the diameter direction. This structure gives button higher wear resistance and toughness, both functionally graded cemented carbide DTH drill, drill or cone ball tooth drill bit life have a significantly improved.

4. New binder modifying carbide buttons: Treatment with molten metal (Ni or Si as alloying additive elements), Ni and Si alloy can significantly improve the ability of anti-fatigue cracks. In addition, Ni sintered alloy melt to permeate the process of WC skeleton occurred off junction formed developed WC / Co sintered alloy phase interface, the grain size is reduced, thereby the fracture toughness increases. The results show that the solder alloy cone rotary drilling bit, the working efficiency is improved by 1.8 times.

5. Double bonded carbide: Compared with conventional tungsten carbide, tungsten carbide pellet is composed of sintered pellets instead of hard compound. The sintered pellets mixed with a binder metal and a second sintering, thereby making the fracture toughness without lowering the hardness of the premise of a substantial increase.

6. WC-Co-diamond three-phase composite hard materials: High temperature high pressure synthesis, powder / polymer mixture extruded into green compacts, and then consolidated by high temperature and pressure synthesis of diamond. It has many advantages, such as reducing the mismatch in thermal expansion and elastic stress off the diamond enhanced; diamond enhanced surface and the wear resistance improved; Fracture toughness of WC-Co- diamond composite surface is excellent, improve service life.

With the rapid development of science and technology, whether mechanical industry or microelectronics and even medical fields, all tends to miniaturized and sophisticated. Even the traditional carbide industry is no exception, conventional carbide bar diameter range is generally φ1-40mm. Tungsten carbide rods is also known as tungsten carbide bars, which consists of refractory metal compound as a hard phase and a binder phase metal. Due to its high hardness, high density, high strength and excellent wear and corrosion resistance, it can be widely used in metal cutting tools, drills, grinding tools. But tungsten carbide material is brittle, so there is a great difficulty on tungsten carbide ultra-fine rods manufacturing, which is always a barrier in the development of domestic tungsten carbide industry,

Recent years, some domestic enterprises had a breakthrough in tungsten carbide ultra-fine tungsten carbide rods. In general, in conventional tungsten carbide industry, fabricating diameter of less than 3mm rod is already a certain degree of difficulty. But they through continuous efforts to break through technical difficulties, it is now capable of producing ultra-fine 0.6mm tungsten carbide rods. Throughout the development process, from ingredients, pressing to sintering, each procedure they have to conquer one by one. It requires the use of ingredients when nano-scale particles as a main raw material, and meanwhile pay attention to the ratio of raw materials; the most difficult part is pressing and drying section, due to the mold mouth is very small, conventional extrusion molding agent is hard to achieve extrusion molding. So the relevant researchers updated the recipe of the agent by searching the materials abroad and find the best solution; sintering process is also a part needs precise controlling, due to the small diameter once a parameter error will shrink products uneven, resulting in deformation. Through continuous testing, and finally developed an alternative to imported products for ultra-fine micro-drilling diameter tungsten carbide rods, to break the foreign monopoly on the Chinese market. Currently, tungsten carbide ultra-fine rods mainly used in PCB (Printed Circuit Board) drilling, and the micro-drill by high-speed steel used in dental has been replaced by tungsten carbide micro-drills gradually.

Since Jeong eun kim was in office, earthshaking changes have taken place for the domestic matters in North Korea, gradually he takes the full control of the political situation. He becomes the real master of all states' rights, and it seems to have a tendency to centralization of power. Recently, North Korea is in a time of emergency whose political situation is relatively unstable, therefore, the China made clear regulation for transporting minerals for North Korea. In the April 5, 2016, the Ministry of Commerce of the People's Republic of China published an embargo for partial minerals for North Korea.

Announcement mainly mentioned that import coal and iron and iron ore from North Korean is prohibited. Unless the imports have been proven that they were not produce in North Korean and importers should provide information and application to provincial competent commercial section, after a series of proof then importers can import things. Secondly, it is not allowed to import gold ore, vanadium and titanium ore and rare minerals. There is also a ban on the export of aviation fuel, including aviation gasoline, naphtha type jet fuel, kerosene type jet fuel and kerosene rocket fuel to North Korean, unless it has passed through the UN Security Council Sanctions Committee.

With the rapid development of chinese economy, wolfram heater industry also continues to expand and grow, and since China has been joining the WTO, the export of this industry is gradually increased. Although the past two years, the export situation in China is not optimistic, but in accordance with relevant policy information issued by the State which did not make strict controls for tungsten heater, indicating that wolfram heater still has good investment prospects. What’s more, with the continuous improvement of the national scientific and technological strength, quality and quantity of tungsten heater has been improve, coupled with the reputation "Tungsten City", therefore, tungsten heat would remain the stable development of the state.