The most important advantage of laser Welding Wire is the ability to very high energy the focal point, the laser beam hit the edge of the two parts to be welded, the input energy to heat them to melt metal. The role of the laser beam after the melting of the material will cool rapidly. In this process, there is a small number will enter in the welded parts. Reduce the thermal deformation in welding, but also reduce the input of thermal energy. Reduce the heat of deformation, and increase the accuracy of the correction, you can save a lot of money and time. Laser Plastic Welding
However, how to improve the welding speed and reduce the low energy input is the challenge. Reduced by heating in the region of low energy input despite its benefits: pearlite, martensite and austenite steel joint structure of the complex type does not change the structure of large-scale, this feature also applies to other steels, such as good carbon deposition is limited to the IF steel; but on the other hand there are some inadequacies, a small amount of energy will lead to a rapid cooling, thermal energy will be imported into the cooling area. Laser Plastic
To reduce the hardening of joints, carefully adjusting the speed of welding parameters, laser power, cooling rate and the focus position is very important. And in order to prevent further hardening of the metal, need to be protected by protective gas such as argon and helium in the material will not be any hot reaction gases.Flux Cored Welding Wire
Small laser beam spot size is another problem caused by cutting-edge quality, and if the middle of the two parts to be welded seams, laser beam through the material to ensure no contact with them to their melts. To avoid this, the requirement for very high precision parts. Currently, field of use is more common to connect two parts of the long slit, which the body can be more and more space in the discovery.
For welding and repair welding of structural steel Welding Electrodes include, heat-resistant steel electrode, stainless steel welding rod, welding electrodes, cast iron welding rod, nickel and nickel alloys and special purpose welding electrodes and so on.
Welding electrode model is based on national standards, reflecting the main characteristics of a welding rod representation. Electrode models include the following meanings: electrode type, electrode characteristics (such as welding core metal type, temperature, chemical composition of deposited metal or tensile strength, etc.), drug skin type and welding power supply. Models of different types of electrodes, said method is also different.
1, carbon steel electrode model
According to GB/T5117-95 "carbon electrode" standard, carbon steel electrode type according to the mechanical properties of deposited metal, drug skin type, welding position and type of welding current to be divided. The first letter "E" said electrode; first two numbers indicate the minimum tensile strength of deposited metal, in units of kgf / mm ² (1kgf/mm ² = 9.81MPa); the third digit welding position, "0 "and" 1 "applies to all welding positions (ie flat, vertical, overhead, horizontal welding)," 2 "applies to a flat butt and fillet weld," 4 "applies to a downward vertical position welding; third, fourth-digit combinations, said welding current range and type of drug skin. In the fourth digit after the letters have special provisions attached electrode, such as "R" means resistance to moisture absorption electrode; additional "-1" indicates that the impact of special provisions of the electrode performance.
2, low-alloy steel welding rod model
According to GB/T5118-95 "low-alloy steel welding rod" standard, low-alloy steel welding rod model based on the mechanical properties of deposited metal, chemical, drug skin type, location and current of each type of welding. The first letter "E" said electrode, the first two numbers indicate the minimum tensile strength of deposited metal; the third digit welding position, "0" and "1" applies to all welding positions (flat welding, vertical welding , Yang welding and horizontal welding), "2" applies to a flat butt and fillet weld; third and fourth digit indicates the welding current range and combination skin types of drugs; suffix letter for the chemical composition of deposited metal classification code, and with a dash "-" and in front of numbers separately. If there are additional chemical composition, the additional chemical element symbols directly, and a dash "-" in front of the suffix letters and separated.
3, stainless steel welding rod model
According GB/T983-95 "stainless steel electrode" standard, stainless steel welding rod according to the chemical composition of deposited metal, drug skin type, welding position and welding current of each type of model. The first letter "E" said electrodes, "E" behind the numbers indicate the chemical composition of deposited metal classification code, there are special requirements of the chemical composition of elemental symbols on the figure behind. Dash "-" followed by two numbers indicate the electrode drug skin type, welding position and welding current types. Stainless steel electrode append the suffix models (15,16,17,25,26), said drug skin type and electrode type welding power source, the table below 1 - 1. Suffix 15, said alkaline, level of anti-DC welding; extension 16 that can be alkaline, it can be titanium or titanium calcium type coating, both AC and DC; suffix 17 is a drug and the skin type 16 variant, said titanate type coating (SiO2 instead of drug use in some skin types 16 TiO2), solder melting fast, excellent anti-redness, AC and DC. Suffix 25 and 26 of drug ingredients and operating characteristics of skin and skin type of drug the electrodes 15 and 16 similar drugs skin types 15 and 16 electrodes are also suitable for description of drug skin types 25 and 26.
Stainless steel electrode with the new national standard GB983-85 GB/T983-95 changes compared to the larger. Stainless steel electrode original model (GB983-85) in the first letter "E" said electrode, the carbon content of deposited metal with the "E" behind one or two digits, "00" indicates that the carbon content of not more than 0.04%, "0,1,2,3", respectively, the carbon content of not more than 0.10%, 0.15%, 0.20%, 0.45%. Carbon numbers behind the numbers, respectively, deposited metal Cr, Ni content of the approximate percentage. If the deposited metal alloy that contains other important elements, elements in the model coupled with the note symbols and their average levels.
4, the welding electrode type
According to GB984-85 "Welding Rods" standard, welding electrodes deposited metal type by the chemical composition and the type of drug into the skin. The letters "ED", said welding electrode, the third model in the third to last, said electrode characteristics, chemical element with symbol alphabet or surfacing electrode model classification.