CHEN Yangke, LIU Ting.Study on the Properties of ZnAg2Cu1.7Yb Solder for Rigging[J].Electric Welding Machine, 2024, 54(9): 118-123. DOI: 10.7512/j.issn.1001-2303.2024.09.16.
Wire rope rigging plays a crucial role in machinery
bridges
and lifting equipment
and its reliability mainly depends on the brazing quality of the wire rope ends and joints. The traditional ZnCu6 brazing material has issues such as high temperature during the brazing process leading to the softening and strength reduction of the steel wires
while at low temperatures
the poor fluidity of the brazing material makes it difficult to achieve good filling
affecting the joint strength. In light of this
appropriately reducing the melting point of the brazing material used without affecting the joint strength has become a feasible direction for research. This paper adds the rare earth element Yb to the ZnCu1.7 eutectic alloy to refine the grains
and improves the strength of the brazed joint with an appropriate amount of Ag component
developing a new type of ZnAg2Cu1.7Yb brazing material for wire rope joint brazing
and the performance characterization of ZnAg2Cu1.7Yb brazing material was carried out through methods such as melting point testing
mechanical property testing
grain size analysis
flowability and porosity testing. The experimental results show that the brazing temperature of the new brazing material is 80 ℃ lower than that of ZnCu6
effectively reducing the thermal impact on the wire rope
while the joint strength is increased by 9.5%; in addition
the grains of the ZnAg2Cu1.7Yb brazing material are refined
the fluidity is enhanced
and the porosity inside the joint is significantly reduced.
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