Hefei University of Technology

Zhengzhou Research Institute of Mechanical Engineering Co., Ltd.

China Innovation Academy of Intelligent Equipment (Ningbo) Co., Ltd.

Huawei Sun

Weimin Long

Yinyin Pei

Sujuan Zhong

Quanbin Lu

Yongtao Jiu

Yucheng Wu

Ping Wei

Dashuang Liu

Yafang Cheng

Jia Ma

Qi Wang

Peng He

Dezhi Wang

A self-shielded flux-cored welding wire with a special protective slag coating formed in situ and a manufacture method thereof. The self-shielded flux-cored welding wire includes a low-carbon steel belt and a flux core powder, the flux core powder is filled in the low-carbon steel belt, the flux core powder includes the following ingredients in percentage by mass: 60-80% glass powder, 2-8% zirconium oxide powder, 0.05-0.85% graphene powder, 2-8% potassium carbonate sodium powder, 1-3% potassium titanate powder, 2-5% rutile powder, 1-5% corundum powder, 1-3% sodium fluorosilicate powder, and the balance of iron powder, and a weight of the flux core powder accounts for 13-25% of a total weight of the welding wire.

Self-shielded flux-cored welding wire with special protective slag coating formed in situ and manufacture method 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

Huawei Sun