Thick-walled titanium pipe, the ratio of titanium tube diameter and wall thickness of less than 20 titanium tube called a thick-walled titanium pipe. Mainly used in petroleum geology drilling pipe, petrochemical cracking tube with using the chemical preservative equipment for pipes, boiler tubes, pipes and automotive bearings, centrifuges, titanium autoclave, chemical equipment, pressure vessels, pipes and other structures aviation precision .
Titanium ball valves, standard GB / T21465-2008 "valve term" is defined as: opening and closing parts (sphere) driven by the stem, and around the valve stem axis of rotational movement. Mainly used to cut off or connected piping media, party workers by adjusting the control valve can be used for the fluid, which has a hard seal between its V-type V-ball ball core and surfacing carbide metal seat a strong shearing force, especially for fiber-containing tiny solid granule and other media. The multi-way valve in the pipeline not only the flexibility to control the confluence of media, diversion, and flow switch, but also to close any channel leaving the other two channels are connected. This type valve in the pipe should generally be installed horizontally. Ball Category: pneumatic valve, electric valve, manual valve.
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2015年5月27日星期三
Welded titanium tubes and seamless difference titanium tube
Welded titanium tubes, titanium or titanium with titanium tube after curl forming welded band. Welded titanium pipe production process is simple, high production efficiency, different specifications, investment in equipment costs are low, but the general strength of less than seamless. Since the 1930s, with the progress of high-quality steel rolling production and the rapid development of welding and inspection techniques, weld continuously improve the quality of different specifications welded titanium tubing is increasing, and more and more fields instead seamless steel tubes. Seam welded titanium tube in the form of divided straight seam welded titanium tubes and spiral welded titanium tubes. In-depth analysis of cutting and welding on the basis of demand, combined with cutting and welding machines College offers computational algorithm, a good software interface, ease of use and scalability of software design, and design based on Visual C ++ 6.0 and implement document management module, parameter input module, the result output module, a graphical display module. The main way to achieve cutting and welding a plate and tube pipe intersection intersection.
In China, with the development of industrial technology, it is recognized that improved cutting and welding technology can reduce the cost of production design, improve production efficiency. In recent years, the rapid development of computer technology has penetrated into all parts of the industrial design, with its excellent computing power and accuracy have been successful in many ways. Robotic welding technology as a way to assist the industrial design in foreign countries has been widely applied and achieved great success. So now welded titanium tube technology and quality can reach a very high level, welded titanium tubes and seamless titanium tube in the quality of basically not much difference.
In China, with the development of industrial technology, it is recognized that improved cutting and welding technology can reduce the cost of production design, improve production efficiency. In recent years, the rapid development of computer technology has penetrated into all parts of the industrial design, with its excellent computing power and accuracy have been successful in many ways. Robotic welding technology as a way to assist the industrial design in foreign countries has been widely applied and achieved great success. So now welded titanium tube technology and quality can reach a very high level, welded titanium tubes and seamless titanium tube in the quality of basically not much difference.
2015年5月24日星期日
Titanium tube production technology introduction process points
Technical requirements
1. Chemical composition of titanium and titanium alloy tubes shall comply with GB / T3620.1, the demand side reinspection, Ming-kun Titanium tolerance chemical components comply with the requirements GB / T3620.2 of.
2. The pipe diameter tolerances should conform to a specified table.
3. The pipe wall thickness tolerances shall not exceed the nominal wall thickness of ± 12.5%, pipe wall thickness tolerances do not apply to weld titanium welded tubes.
4. The length of the pipe should be consistent with the provisions of Table II.
5. The pipe length or double length should be within the range that does not cut length, cut length to allow deviation of + 10mm, double length should be included in the cut-off when the amount of pipe, each cut the amount should be 5mm .
1. Chemical composition of titanium and titanium alloy tubes shall comply with GB / T3620.1, the demand side reinspection, Ming-kun Titanium tolerance chemical components comply with the requirements GB / T3620.2 of.
2. The pipe diameter tolerances should conform to a specified table.
3. The pipe wall thickness tolerances shall not exceed the nominal wall thickness of ± 12.5%, pipe wall thickness tolerances do not apply to weld titanium welded tubes.
4. The length of the pipe should be consistent with the provisions of Table II.
5. The pipe length or double length should be within the range that does not cut length, cut length to allow deviation of + 10mm, double length should be included in the cut-off when the amount of pipe, each cut the amount should be 5mm .
2015年5月21日星期四
Titanium tubes for desalination main features:
Density, specific strength (strength / specific gravity) is high density titanium 4.51g / cm3, aluminum above and below the steel, copper, nickel. The intensity ratio of the first metal but is located, is a stainless steel three times, 1.3 times that of an aluminum alloy;
Good corrosion resistance) Titanium is a very reactive metal, its potential is very low equilibrium thermodynamic corrosion tendency in the medium is large. But in fact titanium is very stable in many media, such as titanium oxide, neutral and weakly reducing medium such as corrosion resistant. This is because the titanium and oxygen has a great affinity, in the air or an oxygen-containing medium, the titanium surface layer of dense, strong adhesion, large inert oxide film, a titanium substrate protection against corrosion. Even due to mechanical wear and tear will heal or regenerate quickly. This shows that titanium metal has a strong tendency to passivation. Medium temperature below 315 ℃ titanium oxide film has always maintained this characteristic 3, good heat transfer performance Titanium Although the low thermal conductivity than carbon steel and copper, but because of the excellent corrosion resistance of titanium, so the wall thickness can be greatly thinned , and the surface of the heat exchanger and steam condensation drops way, reduce the heat set, so the surface is not fouling resistance can be reduced, so that the heat transfer performance of titanium significantly improved
Good corrosion resistance) Titanium is a very reactive metal, its potential is very low equilibrium thermodynamic corrosion tendency in the medium is large. But in fact titanium is very stable in many media, such as titanium oxide, neutral and weakly reducing medium such as corrosion resistant. This is because the titanium and oxygen has a great affinity, in the air or an oxygen-containing medium, the titanium surface layer of dense, strong adhesion, large inert oxide film, a titanium substrate protection against corrosion. Even due to mechanical wear and tear will heal or regenerate quickly. This shows that titanium metal has a strong tendency to passivation. Medium temperature below 315 ℃ titanium oxide film has always maintained this characteristic 3, good heat transfer performance Titanium Although the low thermal conductivity than carbon steel and copper, but because of the excellent corrosion resistance of titanium, so the wall thickness can be greatly thinned , and the surface of the heat exchanger and steam condensation drops way, reduce the heat set, so the surface is not fouling resistance can be reduced, so that the heat transfer performance of titanium significantly improved
2015年5月18日星期一
Titanium tube heat good performance
New titanium or long-term use at higher temperatures 600 ℃.
Good chemical resistance, low temperature performance, represented by low temperature titanium alloy, its strength increases with decreasing temperature increase, but the plastic change is not large.
Its tensile yield strength approaching the performance of titanium shows its yield ratio (tensile strength / yield strength), represents titanium material difference in the molding of plastic deformation. Since the ratio of titanium yield limit and the elastic modulus is large, so that the resilience of titanium molding large.
Good chemical resistance, low temperature performance, represented by low temperature titanium alloy, its strength increases with decreasing temperature increase, but the plastic change is not large.
Its tensile yield strength approaching the performance of titanium shows its yield ratio (tensile strength / yield strength), represents titanium material difference in the molding of plastic deformation. Since the ratio of titanium yield limit and the elastic modulus is large, so that the resilience of titanium molding large.
2015年5月15日星期五
Titanium Compared with other metals, it has the following advantages
Titanium Compared with other metals, it has the following advantages:
① specific strength (tensile strength / density) High (pictured), a tensile strength of up to 100 ~ 140kgf / mm2, while only 60% of the density of steel.
② temperature strength, operating temperature of several hundred degrees higher than aluminum, at moderate temperatures can still maintain the desired strength, long-term work at a temperature of 450 ~ 500 ℃.
③ good corrosion resistance, titanium surfaces in the atmosphere immediately form a uniform layer of dense oxide film, there is resistance to a variety of media erosion. Typically Titanium has good corrosion resistance in oxidizing and neutral medium, more excellent corrosion resistance in seawater, wet chlorine and chloride solution. But in reducing media, such as hydrochloric acid solution, and corrosion resistance of titanium is poor.
④ low temperature performance, low interstitial elements of titanium, such as TA7, at -253 ℃ can maintain a certain degree of plasticity.
⑤ low elastic modulus, low thermal conductivity, no ferromagnetism.
6. High hardness.
7. stamping poor, thermoplastic good.
Titanium heat treatment can be obtained by adjusting the heat treatment process and the organization of different phases. It is generally believed that the fine equiaxed has good plasticity, thermal stability and fatigue strength; needle tissue has a high rupture strength, creep strength and fracture toughness; equiaxed and needle mixed structure has good overall performance.
Commonly used methods are annealing heat treatment, solution and aging treatment. Annealing is to eliminate stress, improve plasticity and organizational stability, in order to obtain a better overall performance. Typically α alloy and (α + β) alloy annealing temperature selected in the (α + β) - → β phase transition point below 120 ~ 200 ℃; solution and aging treatment is rapid cooling from the high temperature zone, in order to obtain martensite α ' phase and the metastable β phase, and then incubated in the temperature region of these metastable phase decomposition to obtain compound α phase or the dispersed second phase particles, achieve the purpose of strengthening the alloy. Typically (α + β) quenching the alloy in (α + β) - → β phase transition points below 40 ~ 100 ℃ carried metastable β quenched alloy in the (α + β) - → β phase transition point above 40 ~ 80 ℃ get on. Aging treatment temperature is generally 450 ~ 550 ℃. In addition, in order to meet the special requirements of the workpiece, the industry also uses double annealing, isothermal annealing, β heat treatment, deformation and heat treatment of metal heat treatment process.
① specific strength (tensile strength / density) High (pictured), a tensile strength of up to 100 ~ 140kgf / mm2, while only 60% of the density of steel.
② temperature strength, operating temperature of several hundred degrees higher than aluminum, at moderate temperatures can still maintain the desired strength, long-term work at a temperature of 450 ~ 500 ℃.
③ good corrosion resistance, titanium surfaces in the atmosphere immediately form a uniform layer of dense oxide film, there is resistance to a variety of media erosion. Typically Titanium has good corrosion resistance in oxidizing and neutral medium, more excellent corrosion resistance in seawater, wet chlorine and chloride solution. But in reducing media, such as hydrochloric acid solution, and corrosion resistance of titanium is poor.
④ low temperature performance, low interstitial elements of titanium, such as TA7, at -253 ℃ can maintain a certain degree of plasticity.
⑤ low elastic modulus, low thermal conductivity, no ferromagnetism.
6. High hardness.
7. stamping poor, thermoplastic good.
Titanium heat treatment can be obtained by adjusting the heat treatment process and the organization of different phases. It is generally believed that the fine equiaxed has good plasticity, thermal stability and fatigue strength; needle tissue has a high rupture strength, creep strength and fracture toughness; equiaxed and needle mixed structure has good overall performance.
Commonly used methods are annealing heat treatment, solution and aging treatment. Annealing is to eliminate stress, improve plasticity and organizational stability, in order to obtain a better overall performance. Typically α alloy and (α + β) alloy annealing temperature selected in the (α + β) - → β phase transition point below 120 ~ 200 ℃; solution and aging treatment is rapid cooling from the high temperature zone, in order to obtain martensite α ' phase and the metastable β phase, and then incubated in the temperature region of these metastable phase decomposition to obtain compound α phase or the dispersed second phase particles, achieve the purpose of strengthening the alloy. Typically (α + β) quenching the alloy in (α + β) - → β phase transition points below 40 ~ 100 ℃ carried metastable β quenched alloy in the (α + β) - → β phase transition point above 40 ~ 80 ℃ get on. Aging treatment temperature is generally 450 ~ 550 ℃. In addition, in order to meet the special requirements of the workpiece, the industry also uses double annealing, isothermal annealing, β heat treatment, deformation and heat treatment of metal heat treatment process.
2015年5月12日星期二
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