Tianjin Vice Mayor Cui Jindu disclosed at the Asia Petrochemical Technology Conference held on May 17 that in 2010, Tianjin’s crude oil production exceeded 36 million tons, refining capacity reached 22 million tons, and ethylene production reached 1.2 million tons. The petrochemical industry has formed a complete The industrial chain has an output value of more than 400 billion yuan.

Cui Jindu said that during the “11th Five-Year Plan” period, Tianjin’s GDP grew at an average annual rate of 16%, ranking first in the country. Tianjin is the birthplace of China’s modern chemical industry and the only city with a centralized central government of the four major petrochemical enterprises. Now it has formed oil and natural gas extraction, crude oil processing, and organic chemical raw materials, synthetic resins, synthetic fibers, and downstream deep processing products. The complete industrial system has become an important petrochemical industrial base in China. During the “Twelfth Five-Year Plan” period, Tianjin will rely on the Nangang Industrial Zone, the main bearing area for the development of the petrochemical industry, in an effort to transform the mode of economic development, optimize the product mix, and promote the coordinated development of the petrochemical industry and the fine chemical industry.

It is understood that the Nangang Industrial Zone developed and constructed in 2009 has been positioned as the world's heavy chemical industry base and the northern China's petrochemical product hub. At present, the Nangang Industrial Zone has signed 29 project investment agreements with a total investment of 58.66 billion yuan. Among them, Sino-Russian 13 million tons/year oil refinery, Sinopec Tianjin crude oil reserve base and other leading projects have laid a foundation; China National Petroleum Million cubic meter crude oil reserve warehouse has been put into operation. In the next 10 years, the Nangang Industrial Zone will focus on the development of petroleum refining, basic chemical raw materials, synthetic materials, engineering plastics, new chemical materials and fine chemicals. By the end of the “Thirteenth Five-Year Plan”, the total investment will reach 800 billion yuan. The annual output value will exceed 1 trillion yuan.

Cobalt Based Alloy Powder

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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