1. The density is small and the intensity is higher.
The density of titanium is 4.51g/cm3, higher than aluminum and lower than steel, copper and nickel, but the strength is located at the top of metal.
2. Corrosion resistance
Titanium is a very active metal, its equilibrium potential is very low, and its thermodynamic corrosion tendency is large in the medium. But titanium is very stable in many media, such as titanium, which is corrosion resistant in oxidizing, neutral and weak reducing media. This is because titanium and oxygen have a great affinity. In the air or in the oxygen containing medium, the titanium surface produces a dense, strongly adhesive and inert oxide film, which protects the titanium matrix from being corroded. Even mechanical wear will quickly heal itself or regenerate. This indicates that titanium is a metal with strong passivation tendency. The oxide film of titanium at medium temperature below 315 degrees keeps this characteristic.
In order to improve the corrosion resistance of titanium, the surface treatment technologies such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation and laser treatment have been studied, which have enhanced the protective effect of the titanium oxide film, and obtained the desired corrosion resistance. A series of corrosion resistant titanium alloys, such as titanium molybdenum, titanium – palladium, titanium – molybdenum – nickel, have been developed for the needs of metal materials in the production of sulfuric acid, hydrochloric acid, methylamine solution, high temperature wet chlorine gas and high temperature chloride. Titanium -32 molybdenum alloy was used in titanium castings, and titanium -0.3 molybdenum -0.8 nickel alloy or titanium equipment was used locally for the application of titanium -0.2 palladium alloy for the environment of frequent crack corrosion or pitting.
3. Good heat resistance
Usually, aluminum at 150 degrees C and stainless steel lose its original performance at 130 degrees centigrade, while the new titanium alloy still maintains good mechanical properties at 600 temperature or higher. When the airplane speed reaches 2.7 times of the speed of sound, the surface temperature of the aircraft structure reaches 230 degrees.
Titanium has good heat resistance. It can be used in aero-engine, rear fuselage and heat affected parts of engine.
4. Good resistance to low temperature
Titanium alloys, such as TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) and Ti-2.5Zr-1.5Mo, are represented by low temperature titanium alloys, and their strength increases with the decrease of temperature, but the plastic changes are not significant. It keeps good ductility and toughness at -196-253 C and avoids the cold brittleness of metal. It can be used in liquid nitrogen, liquid oxygen rocket engine, or the ideal material of cryogenic vessels and tanks on manned spaceship.
5. Strong anti damping performance
When metal titanium is subjected to mechanical vibration and electric vibration, its self vibration attenuation time is the longest compared with steel and copper metal. This property of titanium can be used as a vibrating element for tuning fork, medical ultrasonic grinder and vibrating loudspeaker for advanced loudspeaker.
6. Special functions of non-magnetic, non-toxic, titanium and alloy.
Titanium is a non-magnetic metal and will not be magnetized in a large magnetic field. It is nontoxic and has good compatibility with human tissues and blood, so it is adopted by the medical profession.
1. memory function
TiNi alloy has the ability to restore its original shape at certain temperature.
2. superconducting function
NbTi alloy exhibits superconductivity at a specific low temperature.
3. hydrogen absorption function
The TiFe alloy has a large amount of hydrogen absorbing ability, which can be used to store hydrogen safely.
7, the tensile strength is close to the yield strength.
This property of titanium indicates that its yield strength ratio (tensile strength / yield strength) is high, indicating the poor plastic deformation of titanium materials during forming. Because the ratio of the yield limit to the elastic modulus of titanium is large, the resilience of titanium during forming is large.
8. Good heat transfer performance
Although the thermal conductivity of metal titanium is lower than that of carbon steel and copper, the wall thickness can be greatly reduced because of the excellent corrosion resistance of titanium, and the heat transfer mode of the surface and steam is dripping condensing, reducing the heat group, reducing the surface without scaling and reducing the thermal resistance, so that the heat transfer performance of the titanium is greatly improved.
9. Low modulus of elasticity
The elastic modulus of titanium is 106.4GMPa at room temperature, 57% of steel.
10, inspiratory performance
Titanium is a highly reactive metal which can react with many elements and compounds at high temperatures. Titanium getter mainly refers to reaction with carbon, hydrogen, nitrogen and oxygen at high temperature.
Ten properties of titanium
What should we pay attention to when the stainless steel round hole puncher is operated
Because of the stainless steel circular pipe punching machine in the process of operation need to be used very much to complete the work of punching, so in the operation of the situation can be too close to the body to contact the processing area, so as not to cause accident harm to the safety of the person. Therefore, in the whole operation process, we should be very careful. Specifically, the tube punching machine should pay attention to the following aspects when operating.
1. Check the tools before use
Before running the circular pipe punching machine, a series of preparations must be done, especially when the punch and the lower die blade must be checked, if there are any sundries, it should be cleaned first. At the same time, it is also necessary to lubricate the lubricating oil on the upper part of the punch of the punch punch. If it is a hydraulic circular pipe punching machine, it should also check the seal of the cylinder. If there is leakage, it should be processed in time.
Square pipe cutting machine – (1) a
Two. Pay attention to the debugging work
For the hydraulic circular pipe punching machine, the pressure of the related equipment is generally adjusted in a certain range before the factory is out, which can not be adjusted by the user. And the best round tube punching machine manufacturers emphasize that when assembling the upper and lower dies, the model between the two must be consistent to the right, and the related parts must be tightened and fixed well, and when the lower mold is installed, the knife mouth is upwards, and must not be installed in turn. Otherwise, the machine will be damaged.
The operation process of laser cutting machine
1. observe the safety operation rules of the general cutting machine. Start the laser in strict accordance with the laser startup program.
2. operators must be trained, familiar with the structure and performance of the equipment, and master the relevant knowledge of the operating system.
3. wear protective clothing according to regulations, and wear protective glasses that meet the requirements near the laser beam.
4. before making sure that a material can be irradiated or heated by laser, do not process it, so as to avoid the potential danger of smoke and steam.
5. when the equipment is started, the operator shall not leave the post without authorization or wait for the management. If he really needs to leave, he should stop or cut off the power switch.
6. put the fire extinguisher in a convenient place; turn off the laser or sluice when it is not processed; do not place paper, cloth or other flammable objects near the unprotected laser beams.
7. in the process of finding abnormal, the machine should be shut down immediately, troubleshooting promptly or reporting to the supervisor.
8. keep the laser, bed and surrounding areas clean, orderly and free from oil pollution. The workpiece, board and waste are stacked according to regulations.
9. when using gas cylinders, avoid damaging the welding wires, so as to avoid leakage accidents. The use and transportation of cylinders should comply with the gas cylinder monitoring regulations. It is forbidden to explode or close to the heat source under the sun. When opening the bottle valve, the operator must stand on the side of the bottle mouth.
10. the high pressure safety regulations should be observed during maintenance. Each operation for 40 hours or weekly maintenance, 1000 hours per operation or six months’ maintenance shall be carried out in accordance with regulations and procedures.
11. after starting, manual low speed X and Y direction should be started to check the machine and check whether there is any abnormal condition.
12. after the new workpiece program is input, it should be run first and check its operation.
13. when working, pay attention to observing the operation of the machine tool, so as to prevent the cutting machine from getting out of the effective travel range or causing collision accidents in two units.
Electroplating process of belt buckle
The hardware BUCKLE needs strong and durable features, so special folding and stamping equipment is needed when molding. How can all kinds of belt buckles be shaped so that each detail can be evenly plated? The understanding of Dongguan bright belt is the plating process of belt buckle.
First of all, we divide the types of electroplating into: rolling and hanging.
1, rolling electricity in the hardware BUCKLE product appearance requirement is not high, its electroplated hardware products will not be very bright, there will be flower marks, of course the electroplating cost is also low. Three pieces of corn, bump, nail, button and bottom button are usually rolling. Hanging electricity is used for products with high appearance requirements for metal buckle products, such as alloy quick button surface, small five needle pin and hardware chain.
If the belt buckle is safe and environmental friendly, it can be divided into nickel plating and nickel free plating.
2, electroplating is to turn color into film by chemical treatment and attach to the surface of the product. If the element of nickel is infiltrated during the electroplating process, it will not conform to the national environmental protection standard, for nickel plating; for electroplating, no nickel is permeated in the electroplating process, that is, nickel free electroplating. Of course, nickel free plating on hardware products also requires raw materials, such as raw materials containing nickel in itself.
Tips: the common plating colors for hardware accessories are bronze, black bronze, red bronze, nickel, nickel, nickel, Akuro and deep black nickel. Two. Spray paint (injection). In addition to the deployment of any color, the brightness of the fuel can be distinguished from gloss, semi gloss and dummy oil. Spray transparent oil, commonly known as jet oil, is mainly used for acid protection or surface protection. Wipe the oil and then wipe the surface bulge after spraying.
The structural features of the screw conveyor
(1) helical blade of screw conveyor has three types: solid spiral face, belt spiral face and blade spiral face. The solid spiral surface is called the s method, and its spiral pitch GX is 0.8 times the diameter of the blade. The LS screw conveyor is suitable for conveying powder and granular materials. The belt spiral surface is also called the D method. Its spiral pitch is the same as that of the spiral blade, which is suitable for conveying powder and small pieces of material. The application of the blade spiral surface is less. It is mainly used to transport the material with large viscosity and compressibility. In the process of transportation, the mixing and mixing processes are completed at the same time. The screw pitch is about 1.2 times the diameter of the spiral blade.
(2) the spiral blades of the screw conveyor have two rotation directions, left and right.
(3) the types of screw conveyor are horizontal fixed screw conveyor and vertical screw conveyor. Horizontal fixed screw conveyor is the most commonly used type. The vertical screw conveyer is used for short distance lifting materials. The height of the conveyer is generally not more than 8m. The screw blade is a solid face type. It must have a horizontal spiral feed to ensure the necessary feeding pressure.
(4) LS, GX spiral conveyor material export terminal, 1/2~1 ring should be set to reverse spiral, to prevent powder blockage ends.
(5) screw conveyor is composed of three parts: screw body, inlet and outlet and driving device.
The spiral machine body is composed of a head bearing, a tail bearing, a suspension bearing, a screw, a casing, a cover plate and a base.
The driving device is composed of an electric motor, a reducer, a coupling and a base.
The advantages of the electrostatic precipitator
The efficiency of purification is high. The electrostatic precipitator can improve the efficiency of dust removal by increasing the length of the electric field, increasing the effective flow area of the electric field, improving the control quality of the controller and adjusting the flue gas to improve the dust removal efficiency. For conventional electrostatic precipitators, the efficiency of dust removal is generally higher than 99%. It can be covered with fine particles of more than 0.01 microns. In the design, different operating parameters can be used to meet the required purification efficiency.
2. Resistance loss is small, equipment resistance is small and total energy consumption is low. The total energy consumption of the electrostatic precipitator is composed of the energy consumption of the equipment resistance, the power supply device, the heating device, the vibrator and the auxiliary equipment (the discharging motor, the gasifier and so on). The resistance loss of ESP is generally 150 ~ 300Pa, about 1/5 of bag filter, and the share of total energy consumption is relatively low. Generally, the flue gas consumption of lOOOm /h is 0. 2-0. 8kWh. Generally below the 20 mm water column, compared with the cyclone separator, even considering the power consumption of the power supply unit and the rapping mechanism, the total power consumption is still relatively small.
(3) large amount of flue gas treatment. Because the structure of the electrostatic precipitator is easy to modularized, the device can be enlarged. The maximum electric field cross-sectional area of a single electrostatic precipitator reaches 400 square meters.
(4) allow high operating temperature, for example, the SHWB type ESP is best allowed to operate at 250 C, and other types also reach 350~400 C or higher.
It can fully realize automatic control of operation.
Small rhombus steel plate net
Small rhombus steel mesh is also called standard diamond mesh with high quality low carbon steel, aluminum, stainless steel plate, titanium plate, aluminum foil plate, steel plate mesh lead plate, nickel plate punching, into steel net. Small diamond steel plate thickness: 0.4 mm to 8 mm, mesh hole: 8, 10, 2 x16mm x20mm x25mm. Because it has more light net bearing capacity. The small rhombus steel plate net is durable and beautiful in appearance. It is widely used in sound box, filter, building, steel plate network bridge, pedal platform and various kinds of mechanical equipment protection safety. The products of our factory are manufactured in the steel net of all the countries in People’s Republic of China. This standard specifies the dimensions, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of low carbon steel plates.
The strength of the numerical tradition is also known as the building diamond hole wall, also known as the standard steel net, because of the light diamond type, reinforcement performance, steel mesh network connection convenient, NianZhaoLi uniform, strong steel mesh, crack characteristics. It is mainly used in high buildings, civil rooms, seminars and other large area projects, as a powerful, NianZhaoLi gypsum matrix cracking, shock and other characteristics, is the modern construction of new metal building materials. This standard applies to steel nets for construction, protection, ventilation, isolation and other projects. Reference standard: 2828 GB for each batch of sample test sample table (applicable to the edge) the national standard 2829 change inspection and sampling cycle calculation sample Checklist (suitable for production process stability test) 912 common carbon structural steel and low alloy steel sheet. The steel plate net series products produced by our factory have long service life and wide use. It is mainly used for the protection of machinery and equipment, the manufacture of handicraft, the high grade chapter, the road box net guardrail, the Seine net, the sports place, the road greening protection net and so on.
Small rhombus steel mesh is a kind of metal that can be divided into right and right (or two) up and down and right amount. The two metals in this paper are generally not the same thickness of the same article, the width of the steel plate net thickness is the silk, the stem width is less than the thickness of the material. Usually small, made of products. It can also be used for reinforcing bars in construction, highway and bridge. The quality of products has reached the national standard inspection standard and industry. The products are not only sold all over the country, but also exported to the United States, Canada, Britain, Germany, Australia, Singapore, Malaysia, Philippines and other countries. The quality of the products is well received by the users from all walks of life. It can also be used for oil drilling platform, ship platform, operating platform, armrest, channel, capsule ceiling ceiling, maintenance platform, pedestrian bridge, steel grille in ferry terminal, pedal (board). Special platform for steel support, such as channel, corridor, special slip proof expansion plate net, etc. Application: stainless steel mesh can be used for escalators, passageways, mines, locomotives, roads, municipal facilities, and residential quarters. It can be used for making all kinds of machine cover, kitchen utensils, food machinery, chemical filler heating network, all kinds of air filters and heat shield.
Technical requirements of electromagnetic pulse valve
1. The working pressure of the product is 0.1MPa ~ 0.7MPa, and the medium is air after degreasing and water treatment.
2. Under the nominal air pressure state of the product, when the working voltage of the solenoid valve is 85% of the rated voltage, the opening response time of the electromagnetic pulse valve should be less than 0.03s.
3, when the working gas source pressure is 0.1MPa, the pulse valve can be closed.
4, the product should be able to withstand the pressure of the gas source of 0.8MPa.
5, under the specified environmental conditions, the insulation resistance of the electromagnetic coil to the housing should be greater than 1M ohm.
6, under the condition of room temperature of 5 degree to 35 degrees, and relative humidity not more than 85%, the electromagnetic coil can withstand the voltage of 50Hz and 250V for the shell, and it has no breakdown in 1min.
7, the electromagnetic pulse valve should be able to work normally after the vibration of 20Hz, 2mm and 30min.
8, under normal service conditions, the cumulative service life of diaphragm should be greater than 800 thousand times.
9, the appearance of the valve has no obvious damage such as coating peeling, scratching, burr and so on.
10, the large diameter and ultra low pressure electromagnetic pulse valve is used for pressure less than 0.1Mpa, the compressed air is used and the gas is not affected by the gas in the pipe network. The operation is stable and reliable. (0.05~0.1Mpa)
Working principle of stainless steel punching machine
The working principle of stainless steel punching machine is actually very simple. If we want to understand, we must be clear at the end of reading the following paragraph.
Computer control, CCD scan recognition. The product can automatically control the quality of the product by the automatic punching machine that automatically catches the target of the product and moves the rails against the punching and punching on the CCD high definition camera. The whole process takes only 0.4 seconds. It can solve the problems of high rate of punching and scrap, large manual positioning deviation, slow drilling, and large number of time and money.
The computerized stainless steel punching machine is an automatic counterpunching machine specially designed for factories with insufficient manpower. Only by placing the product on the scanner area of the machine HD camera, the quality of the product can be automatically controlled, the precision of the punch hole is under 0.015 millimeters, the CCD camera scanning time is 0.035 seconds, and the punching speed is 0.4 seconds / holes. The factory has solved a series of problems, such as slow drilling speed, large number of employees and high cost. The automatic punching machine is controlled by the computer Windows system. The Japanese HD CCD camera is used to locate the target automatically. The super LCD lets the CCD magnify the positioning hole about 50 times. The CCD camera can automatically identify the defective holes in the material, and can also identify materials that are not printed or reflected or colored. The speed of punching is faster than that of other equipment; it uses an advanced image processing system to control the time of image recognition in 0.39-0.6 seconds and the punching speed is up to 0.4 seconds / holes. Compared with other manual perforating equipment, automatic punching machine has a great advantage in speed, and saves time and manpower to a large extent.
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