vacuum equipment

WHAT KIND OF TECHNOLOGY DOES ALUMINUM ALLOY BRAZING HAVE? (1) FLAME BRAZING Flame brazing is commonly used in combination of small parts, small batches of production and aluminum. You can use an air-gas or oxygen-gas torch. The adjusting torch flame is a weak reduction flame. The heat is applied to the local position where the connection is required until the solder and solder melt and wet the base surface. As the solder melting point is close to the melting point of the base metal, special care should be taken to avoid over-heating the base metal.   (2) BRAZING IN FURNACE When using solder, aluminum alloy can be brazed in the furnace under air atmosphere, but it is better to use controlled atmosphere.  As the moisture content is eliminated in the drying process, no injection welding can be achieved. Dew point at 15 ℃ air or nitrogen atmosphere, can use special non-corrosive solder. In argon gas and vacuum conditions, can not use injection brazing, must maintain the fu

Heat treatment is a very important technology, it changes the microstructure of steel, and thus affects the mechanical properties of tool steel.  Heat treatment is generally composed of heating, insulation and cooling three processes, specific to each stage there are some technical details, such as heating, how to heat up? How to cool down has become the key to heat treatment and the result of heat treatment. Some fans see that "heat treatment of tool steel (1)" is very concerned about when to come out (2). This issue continues to introduce the heat treatment of tool steel, I hope that fans can learn from the key technology of heat treatment of tool steel. HEATING TO HARDENING TEMPERATURE As is said, the stress contained in the material will deform during heat treatment. For this reason, thermal stress should be avoided during heating. Therefore, the basic rule of heating to the hardening temperature is: the heating process must be slow, only a few degrees per minute.

Metal die casting has the characteristics of high production efficiency, saving raw materials, reducing production cost, good performance and high accuracy, which has been widely used in production.  Die casting mould of the surface of the work, direct contact with the liquid metal, under high pressure and high speed flow of liquid metal erosion and heating, after the workpiece demoulding, and rapid cooling, therefore, thermal fatigue cracking, thermal wear and hot melt erosion is a common failure forms of die casting mould, so, for die casting die with cold and hot fatigue resistance, high temperature strength and toughness, liquid metal erosion resistance, high heat resistance and high thermal conductivity, good oxidation resistance and high hardenability and wear resistance, etc.  Heat treatment is an important step to improve die life. The investigation shows that the failure of the mold due to heat treatment or improper operation accounts for about 60% of the total failure. The

 VACUUM INDUCTION MELTING FURNACE IS INTRODUCED IN DETAIL.  Vacuum induction smelting furnace is one of the most widely used equipment in vacuum metallurgy field.  Alloys and special steels for aerospace, missiles, rockets, atomic energy equipment and electronic industry are needed. A considerable part of the products are produced by vacuum induction smelting furnace.  For example, the thermal and workability and mechanical properties of nickel-base, cobalt-base and iron-base superalloys were improved by vacuum induction melting furnace.  For example, stainless steel, heat-resistant steel, ultra-high strength steel, tool steel, bearing steel, magnetic materials, elastic alloys, expansion alloys, etc., almost all use vacuum induction melting furnace to ensure the performance and quality of materials.  With the development of the second remelting process, another aim of vacuum induction furnace is to provide high quality consumable electrode for vacuum arc furnace or electroslag r

MECHANISM OF NITRIFICATION Nitrification is a heat treatment in which the workpiece is put into the medium of a large number of active nitrogen atoms and, at a certain temperature and pressure, infiltrates nitrogen atoms into the surface of the steel to form a nitrogen-rich hardening layer. THE FUNCTION OF NITRIFICATION  1.  Nitriding can make the surface of the part more hard and wear resistant.  Such as made of 38 crmoala steel hardness on the surface of the parts after nitriding treatment of HV = 950-1200, the equivalent of HRC = 65-72, and the high strength and high wear resistance after nitriding to 500-600 ℃, not significantly change.  2. Can improve fatigue resistance. As more compressive stress is formed in the nitrification layer, under the action of alternating load, the parts show higher fatigue limit and lower notch sensitivity, and the fatigue limit of the workpiece after nitrification can be increased by 15-35%.  3. Improve the anti-corrosion ability of workpiece

Purpose: the equipment is mainly used for dipping the stator and rotor of traction motor of electric locomotive. COMPOSITION AND FUNCTION OF VACUUM PRESSURE PAINT DIPPING EQUIPMENT: 1. THE LEACHING PAINT CANS Paint soaking capability :  the equipment can paint one stator or three rotors each time to the traction motor of the electric locomotive. Composition: it is composed of tank body, rotating hoop, tank cover, hydraulic opening cover and elastic mechanism, sight mirror, explosion-proof sight hole lamp, temperature and pressure vacuum measuring instrument, level controller, vacuum port, paint conveying port, pressure port, air vent, etc. Main technical parameters: 1) specification: Φ inside diameter of 1800 mm, straight edge height 1500 mm 2) load vacuum: less than 65Pa time and less than 25min 3) leakage gas of load: 0.13Pa. M3 /s 4) working pressure: 0.4 ~ 0.75mpa 5) pressure medium: filter dry air without oil 6) leaching paint pot allows the highest workin

Gearbox gear is an important part of engine such as automobile and tractor, which is used to change the speed ratio of engine crankshaft and driving shaft.  Therefore, the tooth surface works under high load (impact load, alternating load, etc.), so the wear is fast. In the process of working, the dynamic force is transferred through the contact of the tooth surface. In the process of relative motion of the two tooth surfaces, there are both rolling and sliding, and there is great pressure stress and friction. The tooth end is impacted by frequent shifting. The gearbox gear is required to have high bending strength, contact fatigue strength and good abrasion resistance. (1) MATERIAL SELECTION According to the working characteristics of the gear and its application requirements, low-alloy carburized steel should be selected. Firstly, there are many alloy elements, which ensures the quenching permeability after carburizing and reduces the deformation of the gear. Secondly, the str