本发明涉及一种药皮银钎料环的制备方法，一、取Ag 10‑50%、Cu 15‑45%、Zn 17‑40%、Sn 1‑3%、P 0.1%‑0.5%、Ni 0.5‑2%、Ge 0.1‑0.3%和Li 0.1‑0.3%原料加入中频冶炼炉坩埚内，通过冶炼、浇铸、挤压以及拉拔得到银钎料丝，将银钎料丝制备成多圈簧状银钎料环；二、取单质硼微粉1‑5%、硼氢化钠5‑10%、氟硼酸钾15‑30%、硼酐25‑40%、氟化钠10‑30%、氟氢化钾2‑5%、硫酸铜1‑5%、聚苯乙烯0.1‑2%以及邻苯二甲酸二丁酯0.2‑2%，混合后加入45%的乙酸乙酯并搅拌均匀，制成药皮溶液，待用；三、将药皮溶液喷射涂覆到簧状银钎料环的外部，烘干后即得到药皮银钎料环。本发明制得的药皮银钎料环润湿性好、流动性佳、有自钎作用、锌不易挥发，且药皮活性高、吸潮性弱、碳残留少、塑韧性好，特别适合钎焊不锈钢、锰黄铜等管路组件。

The invention relates to a preparation method of a flux coated silver solder ring. The method comprises the steps of 1, preparing the following raw materials: 10-50% of Ag, 15-45% of Cu, 17-40% of Zn,1-3% of Sn, 0.1-0.5% of P, 0.5-2% of Ni, 0.1-0.3% of Ge, and 0.1-0.3% of Li; adding the raw materials to an intermediate-frequency smelting furnace crucible; performing smelting, casting, extruding and drawing to obtain silver solder wires; and preparing multi-coil spring shaped silver solder ring through the silver solder wires; 2, preparing 1-5% of boron micro powder, 5-10% of sodium borohydride, 15-30% of potassium fluoborate, 25-40% of boric anhydride, 10-30% of sodium fluoride, 2-5% of potassium bifluoride, 1-5% of copper sulfate, 0.1-2% of polystyrene, and 0.2-2% of dibutyl phthalate; mixing the materials; adding 45% of ethyl acetate; and uniformly stirring to obtain a flux coating solution for later use; and 3, spraying the flux coating solution to cover the outer parts of the spring shaped silver solder ring; and drying to obtain the flux coated silver solder ring. The flux coated silver solder ring prepared by the method is high in wettability, high in flowability, and capable of self-fluxing; zinc is hard to volatilize; and moreover, the flux coating is high in activity, low in moisture absorption capacity, few in carbon residues, high in ductility and toughness, and isparticularly applicable to soldering of pipeline assemblies such as a stainless steel pipeline assembly and a manganese brass pipeline assembly.