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Composite brazing filler metal, preparation method and application thereof, and weldment

A technology of composite brazing material and brazing filler metal, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of low strength, tearing, etc., and achieve high strength, good formability, and easy storage and transportation Effect

Active Publication Date: 2020-04-24
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing sandwich composite solder, since the solder alloy at the brazing seam has high strength and hardness, and the core layer material usually has better plasticity but lower strength, the cemented carbide brazing joint is easy to be formed in the entire brazing seam. Tear at the core material

Method used

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  • Composite brazing filler metal, preparation method and application thereof, and weldment
  • Composite brazing filler metal, preparation method and application thereof, and weldment
  • Composite brazing filler metal, preparation method and application thereof, and weldment

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preparation example Construction

[0099] According to another aspect of the present invention, there is provided a method for preparing the above-mentioned composite solder, comprising: braiding a plurality of solder ribs and a plurality of stress buffer ribs to obtain the composite solder. The method has simple process, does not need to adopt multi-pass rolling process, has high production efficiency, and the obtained composite solder has high strength, and is not easy to be torn, desoldered and the like during use.

[0100] In a preferred embodiment, the solder bar is prepared by the following process: the raw material of the solder bar is sequentially smelted, cast, extruded, rolled, drawn or cut, optionally annealed and bent , to obtain brazing filler metal bars. After the raw material of the brazing filler metal is smelted, cast, extruded, rolled, drawn and bent in sequence, the brazing filler metal of the required size can be obtained, and after annealing between drawing and bending, the brazing filler m...

Embodiment 1

[0125] A composite solder, the preparation method comprising: (1) smelting, casting, extruding, rolling, and cutting the BCu58ZnMn solder alloy to a strip-shaped solder with a thickness of 0.2 mm and a width of 2 mm; (2) Anneal the brazing material strip under hydrogen protection conditions at 400°C to 500°C to a Vickers hardness of 95HV; (3) put the brazing material strip in a bending device and bend it to obtain a warp rib with a pit pitch of 0.5mm (4) Divide the warp ribs into odd parts and even parts, vertically link up and down to pull apart the warp ribs, the starting pits of the odd part warp ribs go upward, and the starting pits of the even part go upwards. Bottom; (5) The tensioned iron latitudinal ribs with a diameter of 0.1mm and a Vickers hardness of 125HV are fed into the pits of the warp ribs, and the ribs are staggered and clamped vertically to realize warp ribs. The ribs and the weft ribs are locked up and down; (6) feeding the weft ribs one by one and repeatin...

Embodiment 2

[0128] A composite solder, the preparation method of which comprises: (1) smelting, casting, extruding and drawing the BCu58ZnMn solder alloy to a diameter of 0.5mm; (3) put the solder wire into the bending device and bend it to obtain a warp rib with a pit pitch of 1mm; (4) divide the warp rib into an odd number For the part and the even part, the warp ribs are pulled up and down in a vertical direction and staggered, the starting pit of the odd part of the warp rib is upward, and the starting pit of the even part is downward; (5) The diameter is 0.1mm, Vickers hardness Feed the 125HV tensioned iron latitude ribs into the pits of the warp ribs, and vertically move up and down to clamp the ribs alternately, realizing the mutual locking of the warp ribs and the weft ribs up and down; (6) feeding the latitudinal ribs one by one and repeating the up-and-down linkage of the warp ribs to complete the preparation of high-performance composite solder.

[0129] Under the same brazing...

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Abstract

The invention relates to the field of welding, and particularly provides a composite brazing filler metal, a preparation method and application thereof, and a weldment. The composite brazing filler metal comprises a plurality of brazing filler metal ribs and a plurality of stress buffering ribs, and the multiple brazing filler metal ribs and the multiple stress buffering ribs are connected in a woven mode. The composite brazing filler metal is novel in structure, has a good effect of slowly releasing thermal stress, and is high in welding strength, and the problems of tearing, desoldering andthe like are not prone to occurring at a welding joint.

Description

technical field [0001] The invention relates to the field of welding, in particular to a composite solder, its preparation method and application, and a welded part. Background technique [0002] Cemented carbide tools are widely used, but their plasticity and impact toughness are poor, and they are expensive. Most of them need to be welded with high-strength steel substrates such as tool steel, and high-strength steel such as tool steel can bear the impact load and save precious hard alloys. ,cut costs. The thermal expansion coefficient of cemented carbide and steel matrix is ​​very different, and the expansion coefficient of WC-Co alloy to rib is (4~6)×10 -6 / ℃, while the expansion coefficient of ordinary steel to ribs is about 12×10 -6 / °C. During the cooling process after welding, due to the large difference in the shrinkage rate of the steel matrix and the hard alloy, a large stress is generated between the brazing filler metal in the brazing seam and the hard alloy ...

Claims

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Application Information

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IPC IPC(8): B23K35/02B23K35/30
CPCB23K35/02B23K35/3053
Inventor 董博文裴夤崟董显孙华为侯江涛丁天然黄俊兰程战
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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