Jiangsu Alpha paste recycling, recycling Alpha solder paste, solder factory ho

Tin solder wire and divided into two categories-free solder wire. However, the separation of these two categories has a variety of specifications, different specifications of solder wire to its melting point varies Wuxi recovery Alpha paste, solder wire to make energy-efficient welding must be able to understand the melting point of the solder wire used to be able to guarantee excellent welding. Melting point solder wire is generally determined by the line-purity tin content level and solder, high melting point of the case depends on the tin content have not reached the required standards, and whether the material purity criteria used, and if these two issues are meet the requirements, then the melting point is basically fixed Taizhou Alpha paste recycling, but usually when soldering the IC, due to one-time spot welding requirements plus more complete, iron temperature is in the process of rapid decline, the beginning of high temperature , pulled back when the temperature decreases (due to solder heat away tip), it will cause bridging, to solve this problem, the general requirements with high tin content of tin (63% of cases), to help content must be high flux and chosen nor too low wattage soldering iron is best to use a constant temperature. In the lead-free solder paste composition, mainly by the tin / silver / copper three parts, made of silver and copper to replace the original lead of ingredients. The fundamental properties and phenomena in a tin / silver / copper system, metallurgical reaction of tin and minor elements (silver and copper) between the major determinant of the application temperature, curing mechanism and mechanical properties. According to the binary phase diagram between these three elements, there are three possible binary eutectic reaction. A reaction between the silver and tin at 221 ° C compound phase tin eutectic structure matrix phase and ε between metals (Ag3Sn) is formed. Copper and tin at 227 ° C to form a reaction tin eutectic structure matrix phase and η phase intermetallic compounds (Cu6Sn5). Silver can also react at 779 ° C with copper eutectic alloy of silver-rich copper-rich α phase and α-phase formation. However, in the present study 1, tin / silver / copper triplet compound curing temperature measurement, at 779 ° C is found and the phase transition. This means that most likely the direct reaction of silver and copper compounds in the triple. And in the temperature dynamics of silver or copper is more suitable for reaction with tin, to form a compound Ag3Sn or Cu6Sn5 intermetallic. Therefore, tin / silver / copper triple response can be expected include tin matrix phase, phase ε between the metal compound (Ag3Sn) and intermetallic compound phase η (Cu6Sn5). Like and bipolar tin / silver and tin / copper system identified in Suzhou recovery Alpha Paste, relatively hard Ag3Sn and Cu6Sn5 particles in the matrix of tin tin / silver / copper alloy triple, through the establishment of a long-term internal stress, effective for strengthening the alloy. These hard particles can also be effective in blocking the spread of fatigue cracks. Ag3Sn and Cu6Sn5 formation can separate finer particles of tin matrix particles. Ag3Sn and Cu6Sn5 finer the particle, the more you can effectively separate the tin matrix particles, the overall result is a finer microstructure. This helps to grain boundary sliding mechanism, thereby extending the fatigue life under elevated temperatures. Jiangsu Alpha paste recycling, recycling Alpha solder paste, solder factory ho ho provided by Shenzhen solder recycling companies. Shenzhen Hao Jian solder recycling companies (www.haojianhx.com) strong, credible, in Shenzhen, Guangdong scrap metal industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead solder ho plant and you work into the brilliant, for a better future!