Being solid carbide milling tool increases tool life by up to 50% in austenitic stainless steels and nickel-base alloys. Tool operates best on machines having external coolant supply. Product uses asymmetrical helix angles between 35° and 38° which results in low susceptibility to vibration thereby increasing process reliability. Minimizing build-up on cutting edge, unit is coated with Titanium Aluminum Nitride which increases tool service life.

Some companies have introduced the solid carbide mill, positioned with the Advance product line designation. Advance referring to mid-level performance and price. Advance tools are one part of a group of solid tools labeled either Supreme (high-level performance and price), Advance (mid-level performance and price) or Perform (low-level performance and price). Which is a family of solid carbide milling tools that can increase tool life by up to 50 percent in austenitic stainless steels and nickel-base alloys.

The geometry has been designed to optimize the machining of stainless materials from the ISO M material group as well as for secondary applications in ISO S materials. The new tool family is engineered to operate most efficiently on machines having an external coolant supply.

A tough carbide substrate  is used to provide superior machining reliability. In addition, process reliability is boosted by the mills’ low susceptibility to vibration by incorporating asymmetrical helix angles between 35° and 38°. The tools’ coating, a proprietary recipe of Titanium Aluminum Nitride designed and produced by Walter, increases tool service life and minimizes build-up on the cutting edge.

In the 11^th Aerospace Expo held in Zhuhai on Nov. 1^st, AH4 155 mm ultra-light howitzer was displayed in the indoor Weapons Museum.

The technology of flight research and development has caught up with developed countries, but there has been big problem for the short of raw materials, which are mainly in rare earth metals with high performances, such as rhenium.

Rhenium is a metal with melting point of 3,180℃, similar to tungsten, which is 3,308℃.

Rhenium owns good physical and chemical performances, which results to a wide application in heat resistance parts in aerospace. One of the main use is as additive of 3% ~ 7% in flight engine Ni-based single crystal blade for its deformation and cracking resistance.

Engine Blade

Engine schematic

Engine 3D view

The reserve of rhenium all over the world is really rare with a whole quantity of proven quantity of 2,500tons and whole resource of 7,300~10,300 tons. But it is reported as only 237tons in China by Kunming Institute of Precious Metals.

Rhenium is significant and necessary metal in the development of flight engine, but its shortage has been some restriction for the research. Importing Re or finding alternative metals have been a new research for Chinese aerospace development.

Even in today’s digital age, the world still relies on paper and ink, most of which ends up in landfills or recycling centers. To reduce this waste, scientists have now developed a low-cost, environmentally friendly way to create printed materials with rewritable paper, which is made out of tungsten oxide and a common polymer used in medicines and food.

The U.S. has been working to reduce paper waste by increasing recycling efforts for years. According to the Environmental Protection Agency, more paper is now recovered for recycling than almost all other materials combined. This saves energy, water, landfill space and greenhouse gas emissions. But even more waste could be avoided if consumers could reuse paper many times before recycling or trashing it. So far, however, such products under development often are made with toxic, expensive organic dyes.

The researchers created a film by mixing low-toxicity tungsten oxide with polyvinyl pyrrolidone. To "print" on it, they exposed the material to ultraviolet light for 30 seconds or more, and it changed from white to a deep blue. To make pictures or words, a stencil can be used so that only the exposed parts turn blue. To erase them, the material can simply sit in ambient conditions for a day or two. To speed up the erasing, the researchers added heat to make the color disappear in 30 minutes. Alternatively, adding a small amount of polyacrylonitrile to the material can make designs last for up to 10 days. Testing showed the material could be printed on and erased 40 times before the quality started to decline.