An iron-based electroless welding device

Abstract

Provided is an iron-based nonelectric welding device. The body of the iron-based nonelectric welding device is a disposable die filled with iron-based soldering flux, wherein the iron-based soldering flux contains 48%-57% of ferric oxide powder, 15%-25% of metallic aluminum powder, 0.2%-2.8% of metallic nickel powder, 0.5%-4% of fluorite powder, 1%-6% of silicon dioxide powder, 3.1%-8.2% of calcium oxide powder and 12%-21% of metallic iron powder. The disposable die is formed through single-pressing and stoving after rick fat oil is mixed with standard sand. The soldering flux mainly comprises ferric oxide, ferrous powder and a little of nickel powder, and iron-nickel alloy is produced on soldering points through self-propagating reaction after ignition; the iron-nickel alloy is approximately equal to parent metal steel of a grounding device in electrode potential, and galvanic corrosion of parent metal cannot caused. The die is good in thermal insulation effect and low in price, links of cleaning, die sinking, die filling and the like are reduced through one-time use, time is saved, and scalding risks of staff are reduced. The reaction speed of soldering flux ranges from 45 seconds to 60 seconds and longer than common self-propagation by 20 seconds, the possibility of splashing of reaction products is reduced, evacuation is facilitated, and safety is good.

Description

technical field [0001] The present invention relates to the field and non-electric environment, especially the field of self-spreading and welding technology in the welding process of power system lightning protection grounding device and facilities, specifically an iron-based lightning protection grounding device based on self-propagation technology without electricity welding The device is mainly used in the welding implementation of steel grounding devices for transmission line towers, steel grounding grids for substations, and steel grounding devices for outdoor and non-electric environments. Background technique [0002] Since my country determined to replace copper as the main grounding material in the 1950s and 1960s, steel has been widely used in grounding materials for mine defense nets in my country, and the use range of galvanized steel has reached more than 90%. [0003] The steel ground grid is made of multi-section round steel by welding. During the field weldi...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an iron-based electroless welding device and a method for manufacturing the disposable mold, so as to solve the problems of high cost, complicated operation process and inconvenient operation of existing related products

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