From November 21 to 22, the 2011 China International Fine Chemical Investment and Financing Forum was held in Shanghai. The reporter learned from the forum that as an emerging field with the most vitality and development potential in the chemical industry, fine chemicals is one of the hot spots that investors are currently paying attention to. In the overall investment direction of the fine chemical industry, the chemical new material industry is the most promising.
Zhao Jungui, vice president of the China Petroleum and Chemical Industry Federation, pointed out at the forum that during the "12th Five-Year Plan" period, vigorously developing the fine chemical industry will greatly promote the transformation and upgrading of China's petroleum and chemical industries and boost the development of strategic emerging industries.
Zhang Fang, director of the Fine Chemicals Division of the Petroleum and Chemical Industry Planning Institute, said that the priority investment direction in the field of fine chemicals is chemical new materials, followed by fine chemicals in new areas, while traditional fine chemical investment opportunities are relatively small, mainly in the optimization of products. In the structure. Chemical new materials are not only important strategic emerging industries themselves, but also important supporting supporting industries for the transformation and upgrading of other strategic emerging industries and traditional industries. The overall new chemical materials are still in the market growth period, and some areas are even in the period of market introduction. In this area, priority should be given to upgrading the total quantity, taking into account the optimized structure, that is, to make up for the lack of supply first and to have a resource advantage in areas with a good development foundation. In the field of fluorosilicon materials, we will accelerate the optimization and upgrading of product structures.
Xu Jingsheng, deputy chief engineer of the China Chemical Industry Development Center, said that during the “12th Five-Year Plan†period, new chemical materials should develop new functional materials such as rare earth functional materials and high-performance membrane materials, and actively develop advanced structural materials such as engineering plastics to improve carbon fiber. , Kevlar, UHMWPE and other high-performance fibers and their composite materials development level, the development of nano-, superconductivity, intelligence and other common basic materials research. It is understood that in 2010, the domestic self-sufficiency rate of new chemical materials was only 55% to 60%. During the “Twelfth Five-Year Plan†period, new chemical materials were listed as the focus of the development of the chemical industry, and strive to achieve a domestic self-sufficiency rate of more than 80% for new chemical materials by 2015.
For the development of the fine chemical industry in the new area, Zhang Fang believes that the “Twelfth Five-Year Plan†period should focus on two major goals: First, the overall market self-sufficiency rate will increase from about 70% in 2009 to over 85% in 2015; In areas where imports are heavily dependent on imports, the market's self-sufficiency rate has risen by about one-third from the current level of 1/2. Second, the proportion of environmentally-friendly products has increased substantially, and high-risk, non-environmental products have basically been eliminated; the proportion of high-performance products has increased substantially, matching the upgrading of downstream products.
Zheng Fangyu, chief chemical industry analyst at the Industrial Securities Research Institute, said that the fine chemical and new materials industries have improved their process routes and have more opportunities to transition from existing products to related new fields.
The forum was sponsored by the China Petrochemical Federation, and organized by the China Chemical Industry Economic and Technological Development Center, the China Chemical Industry Promotion Association Chemical Industry Branch, and Industrial Securities.
Cobalt-based alloy powders are commonly used in plasma transfer arc welding (PTAW) due to their excellent high-temperature properties and resistance to wear and corrosion. These alloys are typically composed of cobalt as the base metal, with various alloying elements such as chromium, tungsten, nickel, and carbon added to enhance specific properties.
The use of cobalt-based alloy powders in PTAW offers several advantages, including:
1. High-temperature strength: Cobalt-based alloys exhibit excellent strength and resistance to deformation at elevated temperatures, making them suitable for welding applications that involve high heat.
2. Wear resistance: These alloys have a high hardness and resistance to wear, making them ideal for welding applications where the welded parts are subjected to abrasive or erosive conditions.
3. Corrosion resistance: Cobalt-based alloys offer good resistance to corrosion, making them suitable for welding applications in aggressive environments, such as those involving chemicals or saltwater.
4. Thermal conductivity: Cobalt-based alloys have good thermal conductivity, allowing for efficient heat transfer during welding and reducing the risk of heat-affected zone (HAZ) defects.
5. Compatibility with other materials: Cobalt-based alloys can be easily welded to a wide range of base metals, including stainless steels, nickel alloys, and other cobalt-based alloys, providing versatility in welding applications.
To use cobalt-based alloy powders for PTAW, the powder is typically fed into the plasma arc using a powder feeder. The powder is then melted by the high-temperature plasma arc and deposited onto the workpiece, forming a weld bead. The specific welding parameters, such as arc current, travel speed, and powder feed rate, will depend on the specific alloy and application requirements.
It is important to note that the selection of the cobalt-based alloy powder should be based on the specific welding application and the desired properties of the final weld. Different cobalt-based a
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