Zhengzhou Research Institute of Mechanical Engineering Co., Ltd.

Jia Ma

Yinyin Pei

Quanbin Lu

Weimin Long

Sujuan Zhong

Junlan Huang

Yongtao Jiu

Yafang Cheng

Xian Dong

Yuanxun Shen

Huawei Sun

Qi Wang

Peng He

Dezhi Wang

The present disclosure relates to a copper-phosphorus-zinc-tin brazing sheet and a preparation method and use thereof. The copper-phosphorus-zinc-tin brazing sheet includes a copper core layer, CuP alloy layers respectively arranged on two sides of the copper core layer, and at least two SnZn alloy layers respectively arranged on the other sides of the two CuP alloy layers away from the copper core layer.

Copper-phosphorus-zinc-tin brazing sheet and preparation method and use thereof

A brazing material outer coat and a method for preparing the same, an in-situ synthetic metal-coated flux-cored silver brazing material and a method for preparing the same, a welding method and a joint body, wherein the in-situ synthetic metal-coated flux-cored silver brazing material comprises a flux core and a brazing material outer coat wrapping the flux core, the brazing material outer coat comprises, in percentage by weight: silver Ag 20.0&#x2dc;36.0%, copper Cu 35.0&#x2dc;45.0%, zinc Zn 27.0&#x2dc;37.0%, tin Sn 1.0&#x2dc;3.0%, phosphorus P 0.1%&#x2dc;0.5%, nickel Ni 0.5&#x2dc;2.0%, germanium Ge 0.1&#x2dc;0.3%, and lithium Li 0.1&#x2dc;0.3%, the flux core comprises, in percentage by weight: elemental boron micropowder 5.0&#x2dc;10.0%, sodium borohydride 5.0&#x2dc;10.0%, potassium fluoroborate 15.0&#x2dc;30.0%, boric anhydride 25.0&#x2dc;40.0%, sodium fluoride 10.0&#x2dc;30.0%, sodium bifluoride 2.0&#x2dc;4.0%, and copper sulfate 1.0&#x2dc;5.0%. The in-situ synthetic metal-coated flux-cored silver brazing material in the present disclosure realizes self-reaction in a brazing process to coat a layer of copper film on a surface of a brazed metal, the core of the brazing material has good wettability, good flowability, self-brazing function, and zinc being hard to volatilize, the flux coat has high activity, low hygroscopicity, few carbon residues, good plasticity and toughness, etc. The present disclosure is particularly suitable for brazing pipeline components of stainless steel, manganese brass and so on.

Brazing material outer coat and preparation method thereof, in-situ synthetic metal-coated flux-cored silver brazing material, preparation method thereof, welding method and joint body

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Zhengzhou, China

Jia Ma