Special tin soldering paste for weldable stainless steel

Abstract

The invention relates to the technical field of stainless steel welding, and discloses special tin soldering paste for weldable stainless steel. The special tin soldering paste comprises 35-50 parts of alloy powder, 10-20 parts of soldering flux, 10-20 parts of a silicate solution, 5-10 parts of ultramicro inorganic metal oxide, 7-15 parts of tetrachloroethylene solvent and 20-30 parts of a self-heating agent. The self-heating agent is prepared from, by weight, 40-50 parts of iron powder, 10-20 parts of wood flour, 5-10 parts of activated carbon, 5-15 parts of salt and 10-20 parts of water. By adding the self-heating agent, after the tin soldering paste is extruded, the tin soldering paste makes contact with outside air, heat released by rapid reaction of iron powder and oxygen in the air is reduced, the heat release amount is larger than the heat dissipation amount, temperature rise is caused, various solid powder particles are evenly mixed and dispersed through the water and the wood flour, and a contact surface for gas-solid two-phase reaction is provided. The iron powder can react completely, the heat capacity of the formula is improved, the surface of a welding part can be preheated in the using process of the tin soldering paste, and cracks are relieved.

Description

technical field [0001] The invention relates to the technical field of stainless steel welding, in particular to a special solder paste for welding stainless steel. Background technique [0002] Tin solder paste is widely used in high-precision electronic components. On the one hand, tin solder paste can isolate electronic components from the air, thereby preventing the components from being oxidized. On the other hand, it can ensure the soldering performance of electronic components. , to achieve high resistance and prevent the phenomenon of virtual soldering. With the continuous development of electronic technology, people put forward higher and higher requirements for the welding quality of electronic products. The quality of solder paste has a great influence on the quality of soldering. High-quality solder paste can effectively ensure the quality of soldering. In the assembly and welding of electronic industrial products, tin-lead (Sn-Pb) alloy solder has been used all...

AI Technical Summary

Problems solved by technology

[0004] However, the existing special solder paste for welding stainless steel, in the process of use, due to the high hardenability of stainless steel after welding, it is easy to produce cracks, so it is necessary to preheat the welded parts, but the existing solder paste does not have the function of heating , need to use additional equipment for preheating, and at the same time, the existing tin solder paste, in the process of welding, directly cleans the surface of the weldment, and is prone to high-temperature oxidation when welding stainless steel, which cannot effectively prevent the high-temperature oxidation of the weldment