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A Composite Method for Instantaneous Liquid Diffusion Connection of Large Rotor Steel and Copper

A technology of diffusion connection and large rotor, which is used in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems of insufficient strength of the large rotor and cannot meet the requirements of the workpiece, and achieves lower temperature, higher strength, and improved diffusion. The effect of efficiency

Active Publication Date: 2021-10-12
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the industrial field, the transient liquid phase diffusion connection is often used for the connection between workpieces, such as the connection between the steel and copper of the large rotor, but the method for the transient liquid phase diffusion connection of the large rotor steel and copper in the prior art is relatively Simple, the prepared large rotor is not strong enough to meet the requirements of the workpiece, so the invention discloses a composite method for instantaneous liquid diffusion connection of large rotor steel and copper

Method used

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  • A Composite Method for Instantaneous Liquid Diffusion Connection of Large Rotor Steel and Copper
  • A Composite Method for Instantaneous Liquid Diffusion Connection of Large Rotor Steel and Copper
  • A Composite Method for Instantaneous Liquid Diffusion Connection of Large Rotor Steel and Copper

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: A compound method for instantaneous liquid diffusion connection of large rotor steel and copper, which mainly includes the following steps:

[0031] S1: Connection Surface Pretreatment

[0032] The connection surfaces of the steel connectors and copper connectors are pretreated to remove the oxide layer on the connection surfaces respectively. Oxide layer, and then use laser to clean the polished surface of steel connectors and copper connectors to clean away the impurity particles adsorbed by steel connectors and copper connectors during the grinding process;

[0033] S2: Clamp bonding layer

[0034] Fix the steel connector and copper connector on the connection fixture respectively, and apply a pressure of 0.2MPa to both ends of the steel connector and copper connector;

[0035] S3: Momentary liquid diffusion connection

[0036] Vacuum the joints of steel connectors and copper connectors, preheat the temperature of the joints to 500K, then increase th...

Embodiment 2

[0040] It is basically the same as Example 1, the difference is that after the oxide layer on the connection surface is removed in S1, the connection surface is roughened. The specific process is: using high-pressure air to spray Steel sand and copper sand increase the roughness of the connection surface of steel connectors and copper connectors.

Embodiment 3

[0042]It is basically the same as Example 1, except that in S2, a bonding layer is added in the middle of the connecting surface of the steel connector and the copper connector, and the bonding layer includes: a composite core layer, two particle layers and two thermal stress compensation layers , the layers of the bonding layer are connected by pressure bonding connection,

[0043] The composite core layer is 13μm nickel foil with nickel content ≥ 99.9%,

[0044] Two particle layers are respectively arranged on both sides of the composite core layer, namely a 10 μm copper particle layer and a 10 μm steel particle layer. The connecting surface contacts the connection,

[0045] The thermal stress compensation layer is respectively arranged between the granular layer and the composite core layer, and the thermal stress compensation layer is 7 μm aluminum-manganese alloy.

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Abstract

The invention provides a composite method for instantaneous liquid diffusion connection of large rotor steel and copper, which includes the following steps: S1: pretreat the connection surfaces of the steel connectors and copper connectors, remove the oxide layer on the connection surfaces, and then roughen them. S2: Fix the steel connectors and copper connectors on the connection fixture respectively, and add a bonding layer in the middle of the connection surface of the steel connectors and copper connectors; S3: Pump out the joints of the steel connectors and copper connectors Vacuum, after preheating, use the gradient boost heating method to melt the bonding layer into a liquid state and carry out diffusion connection with the steel connector and copper connector respectively; S4: maintain the temperature and pressure at the connection surface of the steel connector and copper connector, and continue to keep warm Diffusion treatment. In a word, the present invention has the advantages of perfect process, simple and convenient method, high strength of connecting parts and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a composite method for instantaneous liquid diffusion connection of large rotor steel and copper. Background technique [0002] Join forming is one of the important methods of material forming. According to whether the processed base metal is melted during processing, the connection methods can be divided into two categories: the first type is fusion welding, including electrode arc welding, argon arc welding, submerged arc welding, CO 2 Shielding gas welding, laser welding, gas welding, electron beam welding, electroslag welding, plasma arc welding and other welding methods; the second type is solid-state connection, including solid-state diffusion connection with and without intermediate layer, brazing, TLP diffusion connection (or transient liquid phase diffusion connection), conventional sample rotation friction welding, friction stir welding, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/02B23K20/24B23K20/26B23K103/22
CPCB23K20/026B23K20/24B23K20/26B23K2103/22
Inventor 刘锦慧杨平陈梅侯蕊杨维娟
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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