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Method for preventing bearing body babbitt metal from shelling after pouring

A bearing body and body bar technology, which is applied in metal material coating process, coating, hot dip plating process, etc., can solve the problems of tin layer influence, shell body and babbitt bonding force shelling, etc., to avoid demolition. shell effect

Pending Publication Date: 2021-04-09
HARBIN TURBINE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that when the traditional bearing body Babbitt alloy is cast, the oxidation of the tin layer affects the bonding force between the bearing body and the Babbitt alloy and thus produces a shelling phenomenon, and provides a method to avoid the bearing body Babbitt alloy The method of shelling after pouring

Method used

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  • Method for preventing bearing body babbitt metal from shelling after pouring
  • Method for preventing bearing body babbitt metal from shelling after pouring
  • Method for preventing bearing body babbitt metal from shelling after pouring

Examples

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specific Embodiment approach 1

[0011] Specific implementation mode 1: In this implementation mode, a method for avoiding shelling of the bearing body after casting Babbitt alloy is completed according to the following steps:

[0012] Immerse the pouring surface of the bearing shell of the pretreated bearing body into the tin liquid for the first tinning, and immediately sprinkle anhydrous ammonium chloride powder evenly on the pouring surface of the bearing shell after taking it out for 10s~15s, and then immerse it in the tin liquid for the second hanging. Tin, 10s~15s after taking it out again, immediately sprinkle anhydrous ammonium chloride powder evenly on the pouring surface of the bearing bush, and finally pour babbitt alloy liquid on the pouring surface of the bearing bush to complete the pouring of the bearing body babbitt alloy, the tin used for the first tinning The mass ratio of tin liquid and sprinkled anhydrous ammonium chloride powder is 1: (0.07-0.1), and the mass ratio of tin liquid used for ...

specific Embodiment approach 2

[0016] Specific Embodiment 2: The difference between this embodiment and Specific Embodiment 1 is that the steps of pretreatment of the bearing pad of the bearing body are as follows: first, the bearing pad is roughly machined, and then the stress is removed by heat treatment, and then the pouring surface of the bearing pad is treated with hydrochloric acid solution. Carry out rust removal, use ethanol solution to clean after rust removal, and finally coat zinc chloride solution evenly on the pouring surface to obtain the pretreated bearing shell.

[0017] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The differences between this embodiment and Embodiment 1 or 2 are: the outer diameter of the bearing body is Φ362mm, the inner diameter is Φ262mm, and the thickness is 166mm; the bearing body is made of 25# steel.

[0019] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preventing bearing body babbitt metal from shelling after pouring, and relates to the technical field of alloy pouring. The invention aims to solve the problem that the bonding force between a bearing bush body and a babbitt metal is influenced by oxidation of a tin layer and then a shelling phenomenon is generated when the babbitt metal of a traditional bearing body is poured. The method comprises the following steps: immersing the pouring surface of a pretreated bearing body bearing bush into a tin solution for first tinning, immediately and uniformly spreading anhydrous ammonium chloride powder on the pouring surface of the bearing bush after taking out the bearing bush for 10-15 seconds, then immersing the bearing bush into the tin solution for secondary tinning, immediately and uniformly spreading anhydrous ammonium chloride powder on the pouring surface of the bearing bush after taking out the bearing bush for 10-15 seconds, and finally, pouring the babbitt metal liquid to the pouring surface of the bearing bush to finish the pouring of the babbitt metal of the bearing body. The method for preventing the bearing body babbitt metal from shelling after pouring can be obtained.

Description

technical field [0001] The invention relates to the technical field of alloy pouring, in particular to a method for avoiding shelling of a bearing body after casting Babbitt alloy. Background technique [0002] Tin-based babbitt alloy is an alloy composed of tin as the matrix and adding elements such as antimony and copper. It is the most widely used bearing material in industry. Before the tin-based Babbitt alloy is poured, a layer of tin should be hung on the pouring surface of the bearing shell of the bearing body to increase the bonding force between the bus alloy and the bearing shell of the bearing body. However, due to the long time for cleaning after tin hanging and pouring preparation (the bearing body should be hung on the centrifuge for centrifugal pouring, and the middle mandrel should be placed for manual pouring), the tin is easily oxidized, which will affect the relationship between the bearing body and the bearing shell. The bonding force between Babbitt all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/08C23C2/26C23C2/34
CPCC23C2/08C23C2/265C23C2/34
Inventor 冯天澍韩亮徐勤刘永生杜卫锋王健泽张庆博齐利晓吴雨泽彭建强张小伍赵义瀚徐佰明周立艳郭鹏飞崔成滨
Owner HARBIN TURBINE
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