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Aluminum-tin-copper alloy based bearing bush material and preparation method thereof

A technology of tin-copper alloy and base shaft, which is applied in the field of aluminum-tin-copper alloy base bearing material and its preparation, can solve the problems of low bearing capacity of high-tin aluminum alloy, high hardness of low-tin aluminum alloy and high processing cost, and achieve the melting cost. Low cost, good friction reduction and low production cost

Inactive Publication Date: 2016-07-06
HENAN MECHANICAL & ELECTRICAL ENG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the traditional bearing materials, Babbitt alloy has good anti-friction performance and strong surface adaptability, but its bearing capacity is low, the cost is high, and it contains a large amount of polluting heavy metal elements such as lead and cadmium; Good friction, but its cost is high, and the lead element in lead bronze pollutes the environment; among aluminum-based bearing materials, high-tin aluminum alloy has low bearing capacity, complicated process, and high processing cost, and low-tin aluminum alloy has high hardness, but it needs to be used Its surface is coated with a layer of lead-containing anti-friction alloy layer, which is not only complicated in process, high in cost, but also pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare 6.30Kg of K according to the molar ratio of Ti:B of 1:2 2 TiF 6 -KBF 4 Mixed salts are used as reactants, by reaction equation 3K 2 TiF 6 +6KBF 4 +10Al→3TiB 2 +10AlF 3 +12KF shows that during the melting process, the reaction consumption of the aluminum melt accounts for 18% of the mixed salt. Therefore, after considering the reaction consumption of the aluminum melt and the normal burning loss of alloying elements, according to Al: Sn: Cu: Zn: Mn Prepare aluminum ingots, aluminum copper zinc manganese master alloys and tin blocks required for the mass ratio of 85.0:12:1.2:1.0:0.8 to prepare 10.3Kg matrix alloys, wherein the aluminum copper zinc manganese master alloys are aluminum ingots, zinc plates, Al -12Cu master alloy and Al-6Mn master alloy are melted in a vacuum induction furnace and cast at 710°C. The mass ratio of the mixed salt to the matrix alloy is 1:1.63.

[0025] According to Na 3 AlF 6 :MgCl 2 Prepare 0.50KgNa for a mass ratio of 3:1 ...

Embodiment 2

[0029] Prepare 4.6KgK according to the molar ratio of Ti:B of 1:2 2 TiF 6 -KBF4 Mixed salts are used as reactants, by reaction equation 3K 2 TiF 6 +6KBF 4 +10Al→3TiB 2 +10AlF 3 +12KF shows that during the melting process, the reaction consumption of the aluminum melt accounts for 18% of the mixed salt. Therefore, after considering the reaction consumption of the aluminum melt and the normal burning loss of alloying elements, according to Al: Sn: Cu: Zn: Mn Aluminum ingots, Al-Cu-Zn-Mn master alloys and tin nuggets required for the mass ratio of 91.4: 6: 1.5: 0.6: 0.5 to prepare 10.3Kg matrix alloy, wherein, Al-Cu-Zn-Mn master alloys are aluminum ingots, zinc plates, Al -12Cu master alloy and Al-6Mn master alloy are melted in a vacuum induction furnace and cast at 750°C. Wherein, the mass ratio of the mixed salt to the matrix alloy is 1:2.21.

[0030] According to Na 3 AlF 6 : MgCl 2 Prepare 0.32KgNa for the mass ratio of 3:1 3 AlF 6 -MgCl 2 Mixed salt is as reacti...

Embodiment 3

[0034] Prepare 8.5KgK according to the molar ratio of Ti:B of 1:2 2 TiF 6 -KBF 4 Mixed salts are used as reactants, by reaction equation 3K 2 TiF 6 +6KBF 4 +10Al→3TiB 2 +10AlF 3 +12KF shows that during the melting process, the reaction consumption of the aluminum melt accounts for 18% of the mixed salt. Therefore, after considering the reaction consumption of the aluminum melt and the normal burning loss of alloying elements, according to Al: Sn: Cu: Zn: Mn Aluminum ingots, Al-Cu-Zn-Mn master alloys and tin blocks required for the mass ratio of 82.0: 15: 0.8: 1.2: 1.0 are prepared for 10.4Kg matrix alloys, wherein the Al-Cu-Zn-Mn master alloys are aluminum ingots, zinc plates, Al -12 copper master alloy and Al-6Mn master alloy are melted in a vacuum induction furnace and cast at 725°C. Wherein, the mass ratio of the mixed salt to the matrix alloy is 1:1.22.

[0035] According to Na 3 AlF 6 : MgCl 2 Prepare 0.76KgNa for a mass ratio of 3:1 3 AlF 6 -MgCl 2 Mixed sa...

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Abstract

The invention belongs to the technical field of bearing brush materials, and discloses an aluminum-tin-copper alloy based bearing brush material and a preparation method thereof. The material takes in-situ TiB2 particles as an enhanced body, and takes an aluminum-tin-copper alloy as a matrix alloy, wherein volume percentage of the in-situ TiB2 particles is 4.0-12.0%. The preparation method comprises the following steps: (1) melting an aluminum ingot to obtain aluminum melt, and adding a reactant K2TiF6-KBF4 salt mixture and a reactive assistant Na3AlF6-MgCl2 salt mixture into the aluminum melt to obtain the aluminum melt containing in-situ TiB2 particles; (2) adding an aluminum-copper-zinc-manganese intermediate alloy and a tin block into the aluminum melt containing in-situ TiB2 particles to obtain an alloy melt; and (3) taking a NaCl-KCl-CaF2 gas mixture as a refining agent to refine the alloy melt, and casting the alloy melt into a casting mould, thereby obtaining the aluminum-tin-copper alloy based bearing brush material. The aluminum-tin-copper alloy based bearing brush material is excellent in comprehensive functional performance, is low in production cost, is environmentally-friendly, and is pollution-free.

Description

technical field [0001] The invention relates to the technical field of bearing pad materials, in particular to an aluminum-tin-copper alloy-based bearing pad material and a preparation method thereof. Background technique [0002] Bearing bushes are key components for carrying movement, reducing friction and reducing wear in mechanical equipment such as internal combustion engines and presses. The quality of the bearing pad material directly affects the working stability and service life of the bearing pad. Among the traditional bearing materials, Babbitt alloy has good anti-friction performance and strong surface adaptability, but its bearing capacity is low, the cost is high, and it contains a large amount of polluting heavy metal elements such as lead and cadmium; Good friction, but its cost is high, and the lead element in lead bronze pollutes the environment; among aluminum-based bearing materials, high-tin aluminum alloy has low bearing capacity, complicated process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/10F16C33/12
CPCF16C33/121C22C1/1036C22C21/003C22C32/0073F16C2204/22C22C1/1052
Inventor 崔国明翟德梅李兴霞冯振国任泰安曾建民
Owner HENAN MECHANICAL & ELECTRICAL ENG COLLEGE
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