Technical Topics-第19页-Changsha Langfeng Metallic Material Co., Ltd.

Threaded bolt thread commonly used in cold working
Threaded bolt thread commonly used in cold working Threaded bolt thread commonly used in cold processing, so that a certain diameter range of the thread blank through the rub (roll) wire (die), from the wire (roller) pressure to thread forming. It is widely used to obtain that the plastic flow line of the thread portion is not cut off, the strength is increased, the precision is high, and uniform quality. In order to make the thread diameter of the final product, the required thread blank diameter is different because of the accuracy of the thread, the material with or without coating and other factors. Rolling (rubbing) pressure thread is the use of plastic deformation of the thread forming process. It uses a roll (roll plate) mold with the same pitch and profile as the thread to be machined, while pressing the cylindrical billet while rotating the billet, eventually transferring the profile on the roll mold to Spiral blank, the thread forming. Rolling (rubbing) pressure thread processing commonality is that the rolling speed does not have too much, if too much, then the efficiency is low, the thread surface is prone to separation or chaos phenomenon. On the contrary, if the...
How to determine the proportion of tantalum and niobium
How to determine the proportion of tantalum and niobium There are a series of tantalum-containing alloys such as YW1, YW2, YW3, YS25, YS30, and the 798 Zigong Plant in Zhuzhou, all of which have been approved for a long time. Production process tends to improve. But imagine that if you add tantalum to these grades, the alloy will obviously become more brittle and can not meet the strength requirements. If you reduce the tantalum content, then in the red hardness and fatigue resistance can not meet the requirements, and lose its due performance. What happens when we use niobium tantalum? First of all, it is emphasized that the alloy should not be pure niobium but should be tantalum and niobium solid solution, and the content of tantalum is not necessarily the traditional safety ratio (TaC / NhC = 8: 2), only to meet the alloy (mainly tantalum and niobium ) Performance can be fully played. We know that most of the widely used metal in daily life is alloy, with little use of pure metal alone. That is because the alloy is often able to integrate the characteristics of their respective metal and better use. Here we are concerned about...
Metal powder flame spraying (welding) process points
2, to understand the conditions of use of the workpiece: the use of the environment (working temperature, the concentration of major media and other components), the force situation (impact load or sliding fit, static fit), failure causes (processing tolerance, wear, corrosion, etc.)
Thermal spray applications-other application areas
Thermal spray applications-other application areas Thermal spray applications include almost all of the industrial production sector, in addition to the previously described in the automotive and mold industry and the well-known in the aviation, navigation, textile, machinery and other applications, but also quickly expanded to other areas. Such as spraying aluminum for oil piping welds and spraying abrasion-resistant coatings on oil equipment valves, overflow stoppers and tooling tools; spraying carbonyl apatite on artificial joints to enhance titanium matrix and organic Biocompatibility; spray the ceramic coating on the printing roller, and then engrave the lines with the laser for the ink from the ink pool to the printing room, in the air conditioning compressor aluminum valve cap on the spray steel, To achieve the purpose of weight loss and wear, and so on. It is foreseeable that thermal spraying technology will be further developed as the thermal spray technology continues to be studied and the material performance requirements are increasing. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com
Application of Powder Metallurgy
Powder metallurgy using a variety of forming process, the powder material can be directly formed into a small margin, no margin of the rough or net parts, a substantial reduction in machining capacity. Improve material utilization, reduce costs. (WC), titanium carbide (TiC), tantalum carbide (TaC) and other hard alloy, such as tungsten carbide, and other refractory metals and alloy products; Used in the manufacture of cutting tools and wear knives in the drill bits, turning tools, milling cutter, but also manufacturing molds; Cu alloy, stainless steel and Ni and other porous materials for the manufacture of sintered oil bearing, sintered metal filters and textile rings The With the development of powder metallurgy production technology, powder metallurgy and its products will be more widely used.
High pressure water atomization
High-pressure water atomization method for water atomization medium, low price, quenching effect is good, but the resulting powder finished oxygen content of up to 1000 ~ 4000ppm, and high-pressure water atomization method of effective utilization of low energy. The oxygen content of the powder product can be reduced to 50 ppm by the use of inert gas protection, water addition of additives (eg alcohol), or deionization with deionized water. It is now possible to use oil instead of water to make pure powders. Since the 1970s, the fastest growing and most active is the high-pressure gas atomization method, which is one of the most promising processes for mass production of rapidly solidified powders.

‹17 181920 21 ›