Stainless steel, non-ferrous metals, and the surfacing the selection and use of flux
2013-03-25 by xiugai
Stainless steel, non-ferrous metals, and the surfacing the selection and use of flux:
Special requirements according to user requirements development, special kinds of steel flux. Stainless steel flux on the wire, targeted base metal is not strong, a flux (CHF601, CHF260, etc.) can be equipped with a variety of stainless Welding Wires to the corresponding conditions of the chemical composition and mechanical properties of the base material of the welding; while non-ferrous metal flux highly targeted, should be fully validated before the selection of welding wire welding. Surfacing as a welding material surface will naturally be used in a variety of materials, welding base metal diversity, complexity, users should determine on the basis of the argument in the full test flux.
Chrome-nickel stainless steel welding carbide precipitation by repeated heating and easy, and thus reduce the corrosion resistance and mechanical properties. To prevent overheating intergranular corrosion, welding should be used for small current, small line energy input, the thin channel of short arc welding. Note that the resistivity of the stainless steel is large, causing the welding wear may also cause deformation.
Poor thermal conductivity of nickel and its alloys, could easily cause coarse grains, it should be used in small current, small line energy method of welding. Sulfur and lead nickel easily brittle, and the formation of hot cracks should be strictly clean up the oil on the surface of the base metal, rust, paint, dirt, moisture and other impurities before welding; strong stomatal sensitivity welding of nickel and its alloys, noting that the operation .
Impregnable thermal conductivity, large thermal expansion coefficient, low melting, easy to produce cracks, pores and slag easily cause, and therefore they shall have a large heat input welding of copper and its alloys to meet the heat loss caused by the fast cooling rate; well increased positioning solder temperature between the preheat and Road hammering special process.
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