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Preparation method of high-tin aluminum alloy-steel composite plate for large low-speed diesel engine bearing

A diesel engine and aluminum alloy technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problem of not being able to produce large-scale high-tin aluminum alloy-steel composite plates

Active Publication Date: 2018-08-10
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The root cause of this situation is that large-scale high-tin aluminum alloy-steel composite panels cannot be produced in China.

Method used

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  • Preparation method of high-tin aluminum alloy-steel composite plate for large low-speed diesel engine bearing
  • Preparation method of high-tin aluminum alloy-steel composite plate for large low-speed diesel engine bearing
  • Preparation method of high-tin aluminum alloy-steel composite plate for large low-speed diesel engine bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a high-tin aluminum alloy-steel composite plate for a large low-speed diesel engine bearing bush comprises the following steps:

[0042] (1) Alloy melting

[0043] 99.7wt% Al is used for aluminum ingots, 99.99wt% Sn is used for tin ingots, and Cu is added in the form of master alloy AlCu50; No more than 0.1kg; use a resistance furnace and a 300# graphite crucible for melting, heat the graphite crucible to 450°C, then add aluminum ingots, heat up to 720°C to melt all the aluminum ingots, add AlCu50 master alloy; then lower the temperature of the melt To 690°C, add preheated tin ingots in batches, stir thoroughly after adding tin ingots each time, control the temperature at 690°C, start casting after refining and removing slag;

[0044] (2) Slab casting

[0045] Water-cooled metal molds are used for slab casting, and the slabs are cast vertically, with a size of 25mm×200mm×190mm. The inner surface of the water-cooled metal mold is sprayed with a r...

Embodiment 2

[0070] A method for preparing a high-tin aluminum alloy-steel composite plate for a large low-speed diesel engine bearing bush comprises the following steps:

[0071] (1) Alloy melting

[0072] 99.7wt% Al is used for aluminum ingots, 99.99wt% Sn is used for tin ingots, and Cu is added in the form of master alloy AlCu50; No more than 0.1kg; use a resistance furnace and a 300# graphite crucible for melting, heat the graphite crucible to 450°C, then add aluminum ingots, heat up to 720°C to melt all the aluminum ingots, add AlCu50 master alloy; then lower the temperature of the melt To 710°C, add preheated tin ingots in batches, stir thoroughly after adding tin ingots each time, control the temperature at 710°C, start casting after refining and removing slag;

[0073] (2) Slab casting

[0074] The water-cooled metal mold is used for slab casting. The slab is cast vertically. The size is 25mm×200mm×190mm. Fully stir the melt in the graphite crucible before casting, and control t...

Embodiment 3

[0099] A method for preparing a high-tin aluminum alloy-steel composite plate for a large low-speed diesel engine bearing bush comprises the following steps:

[0100] (1) Alloy melting

[0101] 99.7wt% Al is used for aluminum ingots, 99.99wt% Sn is used for tin ingots, and Cu is added in the form of master alloy AlCu50; No more than 0.1kg; use a resistance furnace and a 300# graphite crucible for melting, heat the graphite crucible to 450°C, then add aluminum ingots, heat up to 720°C to melt all the aluminum ingots, add AlCu50 master alloy; then lower the temperature of the melt To 700°C, add preheated tin ingots in batches, stir thoroughly after adding tin ingots each time, control the temperature at 700°C, start casting after refining and removing slag;

[0102] (2) Slab casting

[0103] The water-cooled metal mold is used for slab casting. The slab is cast vertically. The size is 25mm×200mm×190mm. Fully stir the melt in the graphite crucible before casting, and control t...

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Abstract

The invention discloses a preparation method for a high-tin aluminum alloy and steel composite plate for a large low-speed diesel engine bearing bush. The preparation method comprises the steps that smelting and casting are conducted on aluminum ingots, tin ingots and an intermediate alloy, so that a plate billet is obtained; the plate billet is preliminarily rolled, so that a high-tin aluminum preliminarily-rolled plate is obtained; aluminum-coverage rolling is conducted with a pure aluminum plate obtained after annealing and grinding and treated through annealing, so that a high-tin aluminum alloy aluminum-coverage plate is obtained; the high-tin aluminum alloy aluminum-coverage plate is riveted to a steel plate obtained after annealing treatment and grinding treatment, and cold-rolling compositing is conducted, so that a high-tin aluminum alloy and steel composite plate body good in mechanical bonding performance is obtained; then, annealing treatment is conducted on the high-tin aluminum alloy and steel composite plate body so that a high-tin aluminum alloy and steel composite plate finished product can be obtained; and finally, the obtained high-tin aluminum alloy and steel composite plate is cut according to the specification of the bearing bush. According to the method, high-tin aluminum alloy ingots are prepared through a water-cooling die; face milling, preliminary rolling, aluminum coverage, cold-rolling compositing with the steel plate, annealing treatment and the like are conducted, so that the high-tin aluminum alloy and steel composite plate large in specification and high in interface bonding strength and shearing strength is prepared; and the requirement for localizing large low-speed diesel engines can be met.

Description

technical field [0001] The invention belongs to the field of metal composite plate processing, and in particular relates to a preparation method of a high-tin aluminum alloy-steel composite plate applied to the bearing bush of a large low-speed diesel engine. Background technique [0002] Aluminum alloy is a widely used bearing material for large heavy-duty diesel engines. High-tin aluminum alloy is used in thin-walled bearing bushes of large low-speed diesel engines because of its low friction coefficient, high fatigue strength, good seizure resistance, and good emergency running characteristics. High-tin aluminum alloys usually refer to aluminum-tin alloys with a Sn content greater than 20%. With the increase of tin content, the hardness and fatigue strength of Al-Sn alloy will decrease to a certain extent, but the anti-seizure property, mosaic property and compliance will increase accordingly, the anti-seize load can increase accordingly, and the journal wear will decrea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/02B21B1/38B21B47/02C22C1/03C22F1/04C21D9/00
CPCB21B1/38B21B47/02B21B2001/386B21C37/02C21D9/0081C22C1/026C22C1/03C22F1/04Y02P10/20
Inventor 王鹏云雷竹芳冯岩
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP