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Titanium Pipe Good Nature
Titanium heat exchanger is a high-quality titanium tube made of heat will be part of the heat transfer to the cold fluid heat transfer equipment. Titanium heat exchanger by virtue of the many advantages of industrial titanium, chemical, Titanium Pipe oil, power, food and many other industrial sectors of the common equipment, Titanium Pipe occupies an important position in the production.
In practical use, the heat exchanger heat exchanger and heat exchanger material and process characteristics have a great relationship. Material in the concentration process, Titanium Pipe the solute or impurities often in the heating surface deposition, precipitation crystallization and the formation of scale layer, affecting heat transfer; some solute is heat-sensitive, high temperature residence time is too long and easy to degenerate; Titanium Pipe some materials have greater corrosive Or higher viscosity and so on.
Titanium heat exchanger made of high quality titanium tube. In the physical properties, Titanium Pipe titanium tube with a light weight, superior mechanical properties and other advantages. Titanium strength, titanium tensile strength up to 180kg / mm2. Some steel strength is higher than titanium alloy, Titanium Pipe but the titanium alloy specific strength (tensile strength and density ratio) is more than high-quality steel. In addition, titanium alloy has good heat resistance, low temperature toughness and fracture toughness.
Titanium heat exchanger with a variety of fine properties of industrial titanium, widely used in various types of seafood farming, sea water heat exchange, Titanium Pipe salt water heat, chemical, food, medicine, metallurgy, refrigeration, light industry, electroplating industry, Salt, paper, ultrasonic, electronic communications, Titanium Pipe central heating and other industries and fields.
Titanium in the welding of the welding area is prone to oxidation, Titanium Pipe weld stomata, cold cracks and other quality problems, this paper lists the specific and feasible effective preventive measures.
In principle, the stomata can be divided into two categories, namely, the pores inside the weld and the fusion line pores, when the welding line energy is large when the pores are generally located near the fusion line. The effect of stomata is mainly in reducing the fatigue strength of welded joints, Titanium Pipe and even non-destructive testing can not check out the small pores, the fatigue strength will have a significant adverse effect. Stomata can reduce the joint fatigue strength by half or even 3/4, therefore,Titanium Pipe welding should not choose a large line of energy, should use a small current, fast welding process.
Pay attention to the choice of protective gas flow. The choice of gas flow to achieve a good protective effect prevail, too large flow is not easy to form a stable laminar flow, Titanium Pipe and increase the cooling rate of the weld, the weld surface layer appears more α phase, and even cause micro-cracks. When the flow of argon in the hood is insufficient, the weld exhibits a different oxidation color. Titanium Pipe When the flow rate is too large, it will interfere with the airflow of the main nozzle. The flow of argon on the back of the weld can not be too large, otherwise it will affect the front of the first layer of weld gas protection effect. In short, Titanium Pipe to control the flow of gas and flow rate, to prevent turbulence, affecting the protective effect.
Correct selection of welding process parameters. Increased deep pool residence time to prevent the use of bubbles to escape, can effectively reduce the pores. At the same time, the use of small current, Titanium Pipe high welding speed welding specifications, the less the number of welding layers.