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Bearing alloy material with high softening-point temperature

A bearing alloy, high softening point technology, applied in the field of bearing alloy materials, can solve the problems of falling, unable to bear the temperature of the normal operation of the unit, loss, etc., to achieve the effect of increasing the melting point, increasing the critical softening point, and prolonging the service life

Inactive Publication Date: 2013-03-27
浙江申发轴瓦股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the critical softening point of the alloy of the 1000MW ultra-supercritical unit is 112°C. The softening point of the alloy is that the alloy loses its proper hardness when it reaches this temperature. normal operating temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Bearing alloy material with high softening point temperature, including the following components and the mass percentage of each component is: Sn: 74%, Sb: 15%, Cu: 9.405%, Zn: 0.15%, Ag: 0.8%, Ni: 0.06% , Mn: 0.07%, As: 0.08%, Si: 0.075%, Cd: 0.55%, Fe: 0.015%, Al: 0.15%, V: 0.15%, rare earth: 0.015%.

[0013] The formula was tested on the bearings of the 1000MW nuclear power unit of Shanghai Steam Turbine Co., Ltd., and the effect was good.

[0014] Ag is added to the alloy composition, silver can greatly increase the melting point of the alloy, and the appropriate melting point temperature is selected so that when the Babbitt alloy based on tin (Sn) is heated to a suitable eutectic temperature, the silver element penetrates into the tin In the base alloy layer, the composition of the babbitt alloy layer can be changed and the melting point of the alloy can be increased, so that the alloy eutectic layer can be stabilized and solidified. Adding silver (Ag) to the allo...

Embodiment 2

[0023] Bearing alloy material with high softening point temperature, including the following components and the mass percentage of each component is: Sn: 73%, Sb: 15.7%, Cu: 9.2%, Zn: 0.1%, Ag: 0.2%, Ni: 0.02% , Mn: 0.05%, As: 0.06%, Si: 0.05%, Cd: 0.4%, Fe: 0.01%, Al: 0.1%, V: 0.1%, rare earth: 0.01.

Embodiment 3

[0025] Bearing alloy material with high softening point temperature, including the following components and the mass percentage of each component is: Sn: 73.3%, Sb: 14.43%, Cu: 9.9%, Zn: 0.3%, Ag: 0.35%, Ni: 0.09% , Mn: 0.09%, As: 0.10%, Si: 0.1%, Cd: 0.7%, Fe: 0.02%, Al: 0.3%, V: 0.3%, rare earth: 0.02.

[0026] The formula was tested on the bearing of Harbin Steam Turbine Co., Ltd. 1000MW nuclear power unit, and the effect was good.

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PUM

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Abstract

The invention discloses a bearing alloy material with high softening-point temperature. The bearing alloy material comprises the following components in percentage by weight: 73-75% of Sn, 14.4-15.9% of Sb, 8.7-9.9% of Cu, 0.1-0.3% of Zn, 0.2-0.35% of Ag, 0.02-0.09% of Ni, 0.05-0.09% of Mn, 0.06-0.10% of As, 0.05-0.1% of Si, 0.4-0.7% of Cd, 0.01-0.02% of Fe, 0.1-0.3% of Al, 0.1-0.3% of V and 0.01-0.02% of rare earth. According to the invention, elements such as Mn, Si, V and rare earth are added to improve the melting point of babbitt metal, so that an alloy eutectic layer is stabilized and solidified, the mechanical strength of the babbitt metal is improved, the critical softening point of the alloy is improved, the temperature rise of cooling oil can be inhibited effectively, the hardness of the babbitt metal is improved, and the alloy layer is effectively prevented from burning under a semi-dry friction working condition in a starting stage of a machine set.

Description

【Technical field】 [0001] The present invention relates to bearing alloy materials for high softening point temperatures. 【technical background】 [0002] The application of nuclear power generation has become more and more extensive. At present, there are many nuclear power plants in my country. The operation of nuclear power units in nuclear power plants is very important for power generation. The materials of nuclear power units must meet higher requirements to meet the normal operation of the units. In particular, the melting point, mechanical strength, heat resistance and hardness of materials for nuclear power units have a great influence on the operation of the unit. [0003] At present, the critical softening point of the alloy of the 1000MW ultra-supercritical unit is 112°C. The softening point of the alloy is that the alloy loses its proper hardness when it reaches this temperature. normal operating temperature. 【Content of invention】 [0004] The purpose of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C13/02
Inventor 赵光良
Owner 浙江申发轴瓦股份有限公司