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Preparing method for tin-based bearing alloy

A tin-based bearing alloy and silicon alloy technology, applied in the field of bearing alloys, can solve the problems of poor adhesion between alloys and steel shells, alloy composition segregation, casting defects, etc., so as to reduce porosity defects, reduce gas content, and improve wear resistance. Effect

Active Publication Date: 2018-12-07
HONGHE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the whole melting and casting process, the requirements for raw materials are high, the requirements for the preparation before melting are strict, and the requirements for the operation of the melting process are fine. A little carelessness can easily cause casting defects. Poor junction, alloy composition segregation, slag inclusion, porosity and other casting defects

Method used

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  • Preparing method for tin-based bearing alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a. Mix pure tin ingots, pure copper ingots, pure antimony ingots, pure aluminum ingots, pure boron powder, 50% tin-silicon alloy, and 10% tin-titanium alloy according to the mass percentage content of each component in the tin-based bearing alloy : Copper: 4.5%, Antimony: 8%, Titanium: 0.45%, Aluminum: 1.4%, Silicon: 0.7%, Boron: 0.3%, and the rest is tin;

[0022] b. First put 1 / 2 of the pure tin ingot in the above ingredients into the bottom of the crucible, then add 50% tin-silicon alloy, 10% tin-titanium alloy and pure boron powder in turn, heat and melt and then add the remaining pure tin ingot To adjust the temperature, finally add pure copper ingots, pure antimony ingots and pure aluminum ingots;

[0023] c. When the heating temperature rises steadily to 500-550°C, the comprehensive treatment agent can be added immediately for refining and deterioration treatment, and the slag is removed and left to stand for a period of time;

[0024] d. Preheat the steel ingot...

Embodiment 2

[0026] a. Mix pure tin ingots, pure copper ingots, pure antimony ingots, pure aluminum ingots, pure boron powder, 50% tin-silicon alloy, and 10% tin-titanium alloy according to the mass percentage content of each component in the tin-based bearing alloy : Copper: 4.7%, Antimony: 8.5%, Titanium: 0.48%, Aluminum: 1.3%, Silicon: 0.9%, Boron: 0.2%, and the rest is tin;

[0027] b. First put 1 / 2 of the pure tin ingot in the above ingredients into the bottom of the crucible, then add 50% tin-silicon alloy, 10% tin-titanium alloy and pure boron powder in turn, heat and melt and then add the remaining pure tin ingot To adjust the temperature, finally add pure copper ingots, pure antimony ingots and pure aluminum ingots;

[0028] c. When the heating temperature rises steadily to 500-550°C, the comprehensive treatment agent can be added immediately for refining and deterioration treatment, and the slag is removed and left to stand for a period of time;

[0029] d. Preheat the steel ing...

Embodiment 3

[0031] a. Mix pure tin ingots, pure copper ingots, pure antimony ingots, pure aluminum ingots, pure boron powder, 50% tin-silicon alloy, and 10% tin-titanium alloy according to the mass percentage content of each component in the tin-based bearing alloy : Copper: 5.1%, Antimony: 9.5%, Titanium: 0.61%, Aluminum: 1.9%, Silicon: 1.1%, Boron: 0.4%, and the rest is tin;

[0032] b. First put 1 / 2 of the pure tin ingot in the above ingredients into the bottom of the crucible, then add 50% tin-silicon alloy, 10% tin-titanium alloy and pure boron powder in turn, heat and melt and then add the remaining pure tin ingot To adjust the temperature, finally add pure copper ingots, pure antimony ingots and pure aluminum ingots;

[0033] c. When the heating temperature rises steadily to 500-550°C, the comprehensive treatment agent can be added immediately for refining and deterioration treatment, and the slag is removed and left to stand for a period of time;

[0034] d. Preheat the steel ing...

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Abstract

The invention relates to the technical field of bearing alloys, in particular to a preparing method for a tin-based bearing alloy. The preparing method comprises the following steps that a, a pure tiningot, a pure copper ingot, a pure antimony ingot, a pure aluminum ingot and the like are subjected to burdening according to the mass percent content of various components in the tin-based bearing alloy; b, 1 / 2 of the pure tin ingot in the above accessories is placed at the bottom of a crucible, then, 50% of a tin-silicon alloy, 10% of a tin-titanium alloy and pure boron powder are sequentiallyadded, after heating melting, the left pure tin ingot is added for temperature adjusting, and finally, the pure copper ingot, the pure antimony ingot and the pure aluminum ingot are added; c, when theheating temperature is stably increased to 500-550 DEG C, a comprehensive treatment agent can be added for refining modification treatment, and standing is conducted for a period of time after drossing; and d, a steel ingot die is preheated, alloy tin liquid obtained through the step c is poured into the steel ingot die, and cooling is conducted to the room temperature. According to the preparingmethod, the solidification temperature range can be narrowed, mobility is improved, dispersed shrinkage is reduced, the content of gas in the alloy liquid is reduced, and the air hole defect in castings is reduced.

Description

technical field [0001] The invention relates to the technical field of bearing alloys, in particular to a preparation method of tin-based bearing alloys. Background technique [0002] Tin-based bearing alloy, also called tin Babbitt, is a bearing alloy with a long history of use. This type of alloy has a small linear expansion coefficient, good thermal conductivity, process performance and corrosion resistance. Tin-based bearing alloys are usually prepared by melting method and processed by pressure. They are mainly used as high-speed bearings in automobiles, tractors, steam turbines and other machinery. The melting and casting of tin-based bearing alloys is roughly divided into three stages: cleaning and tinning of bearing steel shells, melting of bearing alloys, and pouring of bearing alloys. During the whole melting and casting process, there are high requirements for raw materials, strict requirements for the preparation before melting, and strict requirements for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C13/02C22C1/06
CPCC22C1/03C22C1/06C22C13/02
Inventor 吴昊王鸿钧杨亚河张文斌江洁
Owner HONGHE COLLEGE
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