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. Co Powder,Cobalt 6 Powder,Cobalt 12 Powder,Cobalt 21 Powder Luoyang Golden Egret Geotools Co., Ltd , https://www.xtcwelding.com
In recent years, with the continuous improvement of the environmental awareness of the entire society, governments at all levels and the general public have paid more attention to haze management and are more sensitive to air quality. Under the high pressure of environmental protection, smart smoke (gas) samplers are becoming more popular in environmental monitoring, labor protection, industrial hygiene, factories and mines, and other industries. They can sample the concentration of particulate matter and harmful gases in pipeline pollution sources and smoke The accuracy of continuous measurement instruments is evaluated and calibrated to provide data and technical evidence for environmental governance.
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
Dust (gas) sampler comprehensive calibration system developed smoothly
[China Instrument Network Instrument R&D] The "Smoke (Gas) Sampler Integrated Calibration System Study" project undertaken by the Hubei Provincial Institute of Metrology and Measurement Technology is progressing smoothly. It has developed soot that covers measurement and inspection items such as pressure, flow, and temperature. (Gas) sampler comprehensive calibration system, the next step will be integrated optimization of the system.
Because smart smoke (gas) sampler needs to be measured and measured by measurement professionals such as temperature, pressure, flow, and chemistry, the current measurement work still has problems such as low detection efficiency and complicated certificates, which directly affects the smart smoke (gas). Sampler detection accuracy. Dust (gas) emission-related parameters were inaccurately checked, and industrial and construction industry and other key industries' exhaust emission control lost precise data support.
In order to solve the above problems, the Hubei Provincial Metrology Institute formally established the project in September 2015, and launched the “Study of comprehensive verification system for smoke (gas) sampler†project. Over the past year or so, the project team has focused on various types of exhaust gas inspection requirements, combined with measurement expertise requirements, conducted in-depth research on the mechanism of equipment, and unremittingly promoted project research. It has successfully developed a soot (gas) sampler that covers measurement items such as pressure, flow, and temperature. Comprehensive calibration system can realize rapid verification of multiple parameters of the smoke (gas) sampler; At the same time, it introduces advanced ultrasonic flow measurement methods, automatic pressure generation system and dry body furnace temperature measurement system, making the smoke dust sampler integrated measurement more Accurate and fast. In the next stage, the project team will also integrate chemical, flow and other parameters detection items into the system, and optimize the system as a whole to form a highly automated measurement and inspection system.
In the face of increasingly stringent environmental protection requirements, the Hubei Provincial Institute of Metrology will focus on research and development of “smoke (gas) sampler comprehensive calibration system†and focus on strengthening measurement techniques in environmental protection related fields to provide rapid verification of various environmental monitoring instruments. In response, China will provide more powerful technical support for measurement in the field of environmental monitoring and improvement in China's environmental monitoring.
(Original title: “Smoke and dust sampler comprehensive verification system†research and development smoothly promoted to highlight the new service environment governance)
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