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Preparation method for babbit metal layer of sliding bearing

A technology of babbitt alloy and sliding bearings, which is applied in the field of bearing processing, can solve the problems of poor bonding strength and low strength, and achieve the effects of fastening shrinkage cavities, improving bonding strength, increasing strength and bonding strength

Inactive Publication Date: 2018-01-19
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a babbitt layer for sliding bearings, which solves the problems of low strength and poor bonding strength of the babbitt layer coated on the surface of the sliding bearing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A kind of preparation method of sliding bearing babbitt alloy layer of the present invention, specifically implement according to the following steps:

[0026] Step 1, place the bearing blank in a hydrogen furnace and keep it warm at 550°C-600°C for 20h-30h;

[0027] Step 2, deoxidize the bearing blank obtained in step 1, specifically according to the following steps:

[0028] Step 2.1, cleaning the bearing blank obtained in step 1 with a dilute hydrochloric acid solution with a concentration of 15%-30% or a sodium hydroxide solution with a concentration of 10%-15% for 5min-10min;

[0029] In step 2.2, clean the bearing blank obtained in step 2.1 with clean water for 5 minutes;

[0030] Step 2.3, preheating the bearing blank obtained in step 2.2 to 270°C-350°C, and then coating the surface of the bearing blank with a saturated solution of ammonium chloride and zinc chloride prepared according to 1:1;

[0031] Step 3, preheating the bearing blank obtained in step 2.3 t...

Embodiment 1

[0041] Step 1, place the bearing blank in a hydrogen furnace and keep it warm at 550°C for 20h;

[0042] Step 2, deoxidize the bearing blank obtained in step 1, specifically according to the following steps:

[0043] Step 2.1, cleaning the bearing blank obtained in step 1 with 15% dilute hydrochloric acid solution or 10% sodium hydroxide solution for 5 minutes;

[0044] In step 2.2, clean the bearing blank obtained in step 2.1 with clean water for 5 minutes;

[0045] Step 2.3, preheating the bearing blank obtained in step 2.2 to 270°C, and then coating the surface of the bearing blank with a saturated solution of ammonium chloride and zinc chloride prepared at a ratio of 1:1;

[0046] Step 3, preheating the bearing blank obtained in step 2.3 to 300°C, and then performing tinning treatment on its surface;

[0047] Step 4, put the bearing blank after the tinning treatment in step 3 into a centrifugal casting machine with a rotation angle of 5°, and use 460°C molten Babbitt all...

Embodiment 2

[0050] Step 1, place the bearing blank in a hydrogen furnace and keep it warm at 560°C for 22 hours;

[0051] Step 2, deoxidize the bearing blank obtained in step 1, specifically according to the following steps:

[0052] Step 2.1, cleaning the bearing blank obtained in step 1 with a dilute hydrochloric acid solution with a concentration of 20% or a sodium hydroxide solution with a concentration of 11% for 6 minutes;

[0053] In step 2.2, clean the bearing blank obtained in step 2.1 with clean water for 5 minutes;

[0054] Step 2.3, preheating the bearing blank obtained in step 2.2 to 290°C, and then coating the surface of the bearing blank with a saturated solution of ammonium chloride and zinc chloride prepared at a ratio of 1:1;

[0055] Step 3, preheating the bearing blank obtained in step 2.3 to 400°C, and then performing tinning treatment on its surface;

[0056] Step 4, put the bearing blank after the tinning treatment in step 3 into a centrifugal casting machine with a...

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Abstract

The invention discloses a preparation method for a babbit metal layer of a sliding bearing. Before a bearing blank is subjected to tinning, the bearing blank is preheated to be 300-500 DEG C firstly,thus tin liquid can better permeate into a base body of the bearing blank, and the combining strength of the babbit metal layer is improved. Additionally, when the babbit metal layer begins to be solidified and treelike crystal appears, the bearing blank is subjected to rapid forced cooling through cooling water, and thus grains near the combining layer of the babbit metal layer are refined; and after refining, the combining layer is more firm, shrinkage holes in the combining layer are greatly reduced, and thus the strength and the combing strength of the babbit metal layer can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of bearing processing methods, and in particular relates to a method for preparing a babbitt alloy layer of a sliding bearing. Background technique [0002] Babbitt alloy is mainly used as the anti-friction layer of sliding bearings. Hard spots are evenly distributed on the soft matrix. The soft matrix has good embedding, compliance and anti-seizure properties. Concave and convex hard points will form tiny gaps between sliding surfaces, which become oil storage spaces and lubricating oil passages, which are beneficial to friction reduction. The convex hard points can act as a support and facilitate load bearing. [0003] At present, the preparation of the anti-friction layer of babbitt alloy is realized by casting molten babbitt alloy on the bearing blank, and the casting methods include centrifugal casting method and gravity casting method. The centrifugal casting uses the centrifugal force of the centrifu...

Claims

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Application Information

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IPC IPC(8): B22D19/00B22D19/08B22D13/00B22D30/00
Inventor 王建磊贾谦王晓虎陈润霖袁小阳刘凯
Owner XIAN UNIV OF TECH
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