At present, various types of field strength increases mechanical operation of the emergency repairs put forward higher requirements. Welding is equipped with emergency repair is one of the important technical means, the most commonly used technique is arc welding and gas welding, but the scene of the emergency repair special geographical environment and poor working conditions make large power supply and gas equipment, difficult to be guaranteed. For the field of equipment damage, no external power source without electricity and gas welding technology came into being.
It is an effective means of in situ remediation technologies quickly.
A non-electric welding technology and welding technology features no power is self-propagating high-temperature synthesis (SHS) welding technology innovation and development.
SHS welding based on chemical reactions release energy as the heat source to the reaction product of solder to achieve a solid connection between the welded parts in refractory metals, ceramics, and welding of intermetallic compounds have broad application prospects, but the general SHS welding process also requires a corresponding vacuum pressure reaction apparatus and the heating apparatus, the operation is very convenient. No power is advanced welding technology dedicated handheld welding material welding pen, i.e. matches lit only to initiate the reaction, in order to heat the release of chemical agents for their welding heat the reaction product and the base material melted by wetting, diffusion and mechanisms such reactive crystallization base metal to be welded firmly with the new welding method, with high temperature, welding, etc. to achieve in situ, in an emergency maintenance show good potential applications. Compared with other welding methods, no electric welding technology has the following characteristics:
(1) an exothermic chemical reaction on its own as a welding heat energy, some high-heat system can reach very high temperatures (3000 ~ 4000 ℃), thereby saving energy.
(2) does not require any power supply, gas supply, and other equipment, just match to light, easy to carry, simple operation, suitable for field and other emergency situations quickly and timely emergency repair work efficiency.
(3) No welding is welding electrical method is not sensitive to the surface of the base material, with high strength. No electric welding weld tensile strength of up to 200 ~ 300MPa, flexural strength of 300 ~ 700MPa, impact toughness of 16 ~ 55J/cm2, can effectively meet the emergency field repair of construction machinery requirements.
(4) a wide range of welding applications without electricity, you can achieve the same or dissimilar welding of metallic materials can be applied to a variety of mechanical equipment (machinery manufacturing industry to pick up waiting) welding repair.