Structural characteristics: The electric furnace structure is similar to the international standard electric furnace, the outer shell is made of steel plate and section steel continuous sealing and welding. The lining of the furnace is made of 0.6g/Cm2 ultra-lightweight energy-saving firebricks. Aluminum silicate fiber cotton blanket is pasted behind the furnace lining to make the electric furnace warm up and good insulation. The gap between the shell and the lining is filled with insulation refractory fiber cotton. The furnace is made of lCrl8Ni9TiNi stainless steel plate rolled into a cylinder, welded on both sides, and tested for pressure after X-ray nondestructive testing. The furnace cover adopts insulation type water cooling, and the heat-resistant rubber is used as the sealing ring between the furnace cover and the furnace gallbladder. The furnace bladder cover is provided with nitrogen inlet tank, exhaust pipe, pressure gauge, vacuum suction pipe and safety valve. The upper, middle and lower three areas of temperature control automatically control the temperature, according to the process requirements, exchange setting temperature, automatic or manual power supply, can set the holding time and equipped with high temperature automatic alarm or power off.
2. Trolley vacuum annealing furnace
Structure description: Trolley type vacuum resistance furnace, furnace body heating left, right and bottom, divided into front, middle and back three areas of temperature control, automatic control cabinet temperature controller automatically displays the process temperature, furnace orifice sealed with rubber ring, there is a water circulation device, furnace gallbladder batching frame and feeding device. Mainly used for bright heat treatment of steel pipe and other straight metal materials.
3. Hood vacuum annealing furnace
This equipment adopts heat-resistant stainless steel bell jar and furnace body strictly sealed, so that the working material and the outside air isolation. In the process of heating, cooling box, always in high purity nitrogen, hydrogen gas protection, so that the annealing material to keep bright surface, no oxidation. Because there is a strong convection fan in the furnace, the air in the furnace forms a strong convection circulation, to promote the furnace temperature uniformity, the temperature difference of each point in the furnace can be controlled within degrees Celsius, so that the annealing material obtains uniform physical and mechanical properties.
Light industry products are closely related to people's life and are of various varieties. Because steel has a good comprehensive performance, it can be seen everywhere to show off its skills. Here are only the following examples:
※ Air conditioner and refrigerator
The temperature control function of air conditioner and refrigerator is mainly realized through the evaporation and condensation of copper tube of heat exchanger. The size and heat transfer performance of heat exchange tube largely determine the efficiency and miniaturization of the whole air conditioner and refrigeration unit. In these machines are the use of high thermal conductivity of the special-shaped copper pipe. Taking advantage of the good processing performance of steel, recently developed and produced a heat dissipating pipe with inner groove and high fin, which is used in the manufacture of heat exchangers in air conditioner, refrigerator, chemical industry and waste heat receiver, etc. The total heat conduction coefficient of the new heat exchanger can be improved to 2 ~ 3 times that of the ordinary tube, and 1.2 ~ 1.3 times that of the ordinary low fin tube. It has been used in China. Copper can be saved by 40%, and the volume of the heat exchanger can be reduced by more than 1/3.
Most of the working parts of clocks, timepieces and clockwork devices currently produced are made of "clock brass". The alloy contains 1.5-2% lead and has good workability, which is suitable for mass production. For example, gears are extruded from long brass rods, flat wheels are cut from strips of corresponding thickness, engraved clock faces, screws and joints are made from brass or other copper alloys, etc. A large number of inexpensive watches were made of guncopper (tin zinc bronze) or plated with nickel silver (white copper). Some famous timepieces are made of steel and copper alloys. The hour hand of Big Ben is made of solid brass, and the minute hand is made of 14-foot copper pipe.
A modern watch factory, with copper alloys as its main material, working with presses and precise moulds, can produce 10,000 to 30,000 clocks a day at a fraction of the cost.
※ Paper making
In today's information-changing society, paper consumption is high. The paper looks simple on the surface, but the papermaking process is complex, requiring many steps and the application of many machines, including coolers, evaporators, beaters, paper machines and so on. Many of these components, such as various heat exchange tubes, rollers, percussion rods, semi-liquid pumps and screen, are mostly made of steel alloys.
For example, the fourdrinier paper machine currently in use sprays the pulp onto a fast-moving mesh with a very small mesh (40-60 mesh). Made of braided brass and phosphor bronze wire, the net cloth is large in width, generally more than 20 feet (6 meters), and must be kept perfectly straight. The web moves over a series of small brass or copper rollers, and as it passes the pulp sprayed on top, the moisture is sucked out of the air below. The screens vibrate simultaneously, binding together the fine fibers in the pulp. Large paper machines have large mesh sizes, reaching 26 feet 8 inches (8. l m) wide and 100 feet (3. 5 m) long. Wet pulp contains not only water, but also chemicals used in the papermaking process, which are highly corrosive. In order to ensure the quality of paper, the mesh material requirements are very strict, not only to have high strength and elasticity; And to resist pulp corrosion, copper alloy can be fully competent.
Photoplatemaking with copper plates in printing. A surface polished copper plate is sensitized with a sensitive emulsion and photographed on it. The photosensitive plate needs to be heated to harden the glue. To avoid softening with heat, copper often contains small amounts of silver or arsenic to raise the softening temperature. The plate is then etched to form a printed surface with a pattern of relief dots.
On automatic typesetters, plates are made by the arrangement of brass type blocks, which is another important use of copper in printing. Font blocks are usually made of leaded brass, but sometimes copper or bronze.
※ Wine making
Copper plays an important role in beer brewing around the world. Uchimura, where copper is often used as a malt barrel and fermenter. There are more than a dozen of these vats with a capacity of more than 20, 000 gallons in some famous breweries. In the fermenter, in order to cool down, steel pipes are commonly used for water cooling. Pipes are also used to steam water to heat beer brewing, and pipes to transport liquor, etc.
When whisky and other spirits are distilled, a steel still is usually used. Whisky malt is distilled twice, in two large copper stills.
In the pharmaceutical industry, all kinds of steaming, boiling and vacuum devices are made of pure copper. Zinc cupronickel is widely used in medical devices. Copper alloy or commonly used materials for glasses frames and so on.
Aluminum bronze is a copper-based alloy with aluminum as the main alloying element. It is an aluminum bronze containing iron and manganese, belonging to high strength and heat resistant bronze.Tin bronze A bronze having tin as the principal alloying element, sometimes with phosphorus, lead, zinc, etc.
Aluminum bronze is a common bronze material. Aluminum content of aluminum bronze is generally less than 11.5%. Sometimes, appropriate amount of iron, nickel, manganese and other elements are added to further improve the performance. It has high strength and good wear resistance. It is used for copper sleeves with high strength and parts with wear resistance. The outstanding feature is its good wear resistance.
Aluminum bronze rod manufacturers tell you not to go to crowded places;Coronavirus is passed from the body through respiratory secretions, transmitted through oral fluids, sneezes, contact, and airborne droplets, and infections peak in autumn, winter, and early spring. So wear a mask when you go out (opt for disposable surgical masks or N95 masks. When wearing the mask, it should be fully fitted to the face, covering the mouth, nose, and jaw, and avoid touching the inside of the mask with your hands). Avoid close contact with wild animals or livestock.
Composition and technological properties of silicon bronze
A unique class of brasses in which silicon is the key element of aluminum alloys. In addition to silicon, manganese, nickel, zinc and other elements are added. Silicon bronze has good physical properties, corrosion resistance, wear resistance and electric weldability. It is very easy to produce and process. It has no magnetic band, does not cause fire when impact, and does not lose its original characteristics of raw materials at ultra-low temperature. Common models are QSi3-1, QSi1-3 and so on.
Phosphor bronze plate is a better kind of alloy copper, has excellent electrical conductivity, not easy to burn, ensure the performance at the same time has strong fatigue resistance. Phosphor bronze is commonly used as anti-wear parts and spring shock absorbers, such as computer connectors, mobile phone connectors, new end technology connectors, electronic and electrical torsion springs, switches, slots for electronic equipment, keys, electrical connectors, flexible circuit boards, vibration plates and terminals.