A kind of method of modified snbi system hypoeutectic alloy and the alloy obtained
A hypoeutectic and alloy technology, which is applied in the field of modifying SnBi hypoeutectic alloys, can solve the problems of increasing the Sn-Bi eutectic phase ratio and not reaching it, so as to promote the nucleation rate of the alloy, eliminate particles, Achieve genetic effects
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Embodiment 1
[0038] A method for modifying a SnBi hypoeutectic alloy by using a topological short-range ordered structure. The method induces the transformation of the topological short-range ordered structure through temperature elements. The specific operation steps are: select the SnBi57 hypoeutectic alloy, and select according to the alloy composition Raw materials, each raw material is mixed according to the ratio, vacuum smelted with nitrogen, and borax covering agent is added on the surface of the alloy, the alloy is heated to 400°C for 15-25min, the alloy melt is heated to 950°C, and kept for 20-30min , while adding electromagnetic stirring to make the alloy composition uniform, then cooling down to 400-420 ° C for 20 minutes, and then vacuum casting to prepare the SnBi57 hypoeutectic alloy. The alloy ingot is processed into a cryogenic alloy mold.
Embodiment 2
[0040] A method for modifying a SnBi hypoeutectic alloy using a topological short-range ordered structure. The method induces the transformation of the topological short-range ordered structure through temperature elements. The specific operation steps are: select a SnBi56Cu1.0 hypoeutectic alloy, Select the raw materials for the ingredients, mix the raw materials according to the ratio, vacuum smelt with nitrogen, add boric acid covering agent on the surface of the alloy, heat the alloy to 400°C for 15-25min, heat the alloy melt to 980°C, and keep it warm for 20 ~ 30min, while adding electromagnetic stirring to make the alloy composition uniform, then cooling down to 400-420°C for 30min, and then vacuum casting to prepare a SnBi56Cu1.0 hypoeutectic alloy. The alloy ingots are processed and manufactured into solder sheets for low-temperature brazing of corresponding specifications.
Embodiment 3
[0042] A method for modifying a SnBi hypoeutectic alloy by using a topological short-range ordered structure. The method induces the transformation of the topological short-range ordered structure by temperature elements. The specific operation steps are: select a SnBi45Ag0.3 hypoeutectic alloy, Select the raw materials for the ingredients, mix each raw material according to the ratio, vacuum-fill nitrogen for melting, add boric acid covering agent on the surface of the alloy, heat the alloy to 410°C for 15-25min, raise the temperature of the alloy melt to 1000°C, and keep it warm for 20 ~30min, while adding electromagnetic stirring to make the alloy composition uniform, then cooling down to 400-420°C for 20min, and then vacuum casting to prepare the SnBi45Ag0.3 hypoeutectic alloy. The alloy ingots are smelted and centrifugally atomized to manufacture solder powder for low-temperature brazing of corresponding specifications.
[0043] Such as figure 1 As shown, it is the photo...
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