Multi-element Zn-Sn-Cu-Bi-Nd brazing filler metal for brazing of sintered Nd-Fe-B and steel and preparation process of multi-element Zn-Sn-Cu-Bi-Nd brazing filler metal
A zinc-tin-copper-bismuth, neodymium-iron-boron technology used in manufacturing tools, welding equipment, welding/cutting media/materials, etc. problem, to achieve the effect of high mechanical properties, good wetting properties, and ensuring stability
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[0016] The method of the present invention will be further described in detail through the embodiments given below in conjunction with the drawings.
[0017] A multi-element zinc-tin-copper-bismuth neodymium brazing filler metal for brazing sintered neodymium, iron, boron and steel. Zinc is used as the base alloy component of the filler metal. The alloy composition of the material is calculated by mass percentage (Wt / %): tin (Sn): 4-6, copper (Cu): 0.5-2, bismuth (Bi): 1-3, neodymium (Nd): 1-5, and more The amount of zinc (Zn).
[0018] Sintered NdFeB magnetic material is hard and brittle, has poor plasticity and toughness, the surface is easily oxidized and corroded, the Curie temperature is low (T=320℃-460℃), and the weldability is extremely poor. Therefore, the solder for brazing sintered NdFeB magnetic materials requires a moderate melting temperature, which matches the Curie temperature of the NdFeB magnetic material. The magnetic structure or crystal structure of the materia...
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