1.2mm-3.2mm TIG Welding Wire use precautions
1,1.2mm-3.2mm TIG Welding Wire manufacturers have a certain degree of corrosion resistance (oxidation acid, organic acid, cavitation), heat and wear resistance. Usually used for power plants, chemical, oil and other equipment materials. Chromium stainless steel welding is poor, should pay attention to welding process, heat treatment conditions and the selection of appropriate welding electrodes.
2, chromium 13 stainless steel after the hardening of the larger, prone to crack. If the same type of chromium 1.2mm-3.2mm TIG Welding Wire (G202, G207) welding, must be more than 300 ℃ preheating and 700 ℃ after the slow cooling treatment. If the weldment can not be post-weld heat treatment, you should use chromium nickel 1.2mm-3.2mm TIG Welding Wire (A107, A207).
3, chrome 17 stainless steel, in order to improve the corrosion resistance and weldability and the appropriate increase in the amount of stability elements Ti, Nb, Mo, welding better than chrome 13 stainless steel better. When using the same type of chromium 1.2mm-3.2mm TIG Welding Wire (G302, G307), should be more than 200 ℃ preheating and 800 ℃ after tempering around the tempering treatment. If the weldment can not be heat treated, you should use chromium nickel 1.2mm-3.2mm TIG Welding Wire (A107, A207).
4,1.2mm-3.2mm TIG Welding Wire manufacturers with good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, oil, medical machinery manufacturing.
5,1.2mm-3.2mm TIG Welding Wire manufacturers when welding products, by repeated heating precipitation of carbides, reducing corrosion resistance and mechanical properties.
6, chrome-nickel stainless steel skin with titanium and low hydrogen type. Titanium calcium type can be used for AC and DC, but the depth of soldering when welding deep, and easy to red, so as far as possible the use of DC power supply. Diameter 4.0 and below can be used for all-position welding, 5.0 and above for flat welding and flat welding.
7, the electrode should be used to dry, titanium calcium type should be dried at 150 ℃ for 1 hour, low hydrogen type should be 200-250 ℃ drying 1 hour (can not be repeated drying, or easy to peel the skin peel), to prevent the electrode Skin sticky oil and other dirt, so as not to cause the weld to increase the carbon content and affect the quality of welding.
8, in order to prevent the heating caused by the eye between the corrosion, welding current should not be too much, less than about 20% of carbon steel electrode, arc should not be too long, cold between the layers, narrow bead is appropriate.
1.2mm-3.2mm TIG Welding Wire manufacturers welding material is welded (the same kind or heterogeneous), by heating or pressurization or both, and with or without filling material, so that the material of the workpiece to reach the atomic and And the formation of a permanent connection process.
Method / step:
Is the welding process, the weldment joints heated to the molten state, no pressure to complete the welding method. In the heating conditions to enhance the atomic kinetic energy of the metal to promote the mutual diffusion of atoms, when the metal is heated to the molten state to form a molten pool, the atoms can be fully diffused and close contact between the cooling and solidification, the formation of A solid welded joint (available as a metaphor for ice).
Common gas 1.2mm-3.2mm TIG Welding Wire , arc welding, electroslag welding, gas welding and so on are welding methods.
Second, the pressure welding:
Is the welding process must be applied to the welding pressure (heating or not heating) to complete the welding method. This type of welding has two forms, one is to be welded part of the metal contact to the plastic state or local melting state, 1.2mm-3.2mm TIG Welding Wire and then apply a certain pressure to make the metal atoms between the combination of the formation of a solid welded joints, such as forging, , Friction welding and gas pressure welding is such a welding method. The second is not heated, only in the contact surface of the welding metal to exert sufficient pressure, by means of pressure caused by plastic deformation, so that the atoms close to each other and get a solid connector, this method has cold welding, explosion Welding, etc. (mainly for composite steel).