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Sn matrix babbitt alloy and preparing method and purpose thereof

A technology of tin-based babbitt alloy and alloy liquid, applied in shafts and bearings, mechanical equipment, bearing components, etc., can solve the problems of poor metal wetting ability, uneven composition of ingots, low graphite content, etc. Strength, avoidance of component segregation, effect of low coefficient of friction

Active Publication Date: 2020-07-31
CHINA INNOVATION ACADEMY OF INTELLIGENT EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphite is light in weight and has poor wettability to metals. Therefore, if graphite is directly added in alloy smelting, it is very easy to cause graphite to float, resulting in uneven composition of the ingot and low graphite content. fall off

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0042] A kind of preparation method of described tin-based babbitt alloy mentioned in the present invention comprises the following steps:

[0043] (a), mechanically alloying copper powder and nickel-coated graphite powder to obtain copper-nickel graphite powder;

[0044] (b), heating tin nuggets, antimony nuggets, and copper nuggets to melting and stirring evenly, degassing and refining after deslagging to obtain alloy liquid;

[0045] In some preferred embodiments of the present invention, the stirring adopts electromagnetic stirring and / or mechanical stirring;

[0046] In some preferred embodiments of the present invention, the melting and / or refining process is protected by inert gas;

[0047] In some preferred embodiments of the present invention, the refining time is 30-40 minutes, such as 30, 35, 40 minutes;

[0048] (c), in the alloy liquid that step (b) obtains, add the copper-nickel graphite powder that step (a) obtains, after stirring and heat preservation, alloy ...

Embodiment 1

[0071] This embodiment provides a tin-based babbitt alloy, which contains: 5% antimony, 12% copper, 3% nickel, 1% graphite, and 79% tin by weight percentage.

[0072] The preparation method of the tin-based babbitt alloy of the present embodiment may further comprise the steps:

[0073] Step 1: take by weighing the copper powder that massfraction is 9%, the nickel-coated graphite powder of 4% (nickel massfraction is 75%), particle size is 800 meshes, copper powder and nickel-coated graphite powder are mixed in ball mill, ball-to-material ratio 7:1, ball mill speed 200 rpm, ball milling time 5 hours;

[0074] Step 2: put 5% antimony block, 3% copper block, and 79% tin block into a graphite crucible, heat until the metal melts, use electromagnetic stirring and mechanical stirring to homogenize the components, exhaust and remove slag;

[0075] Step 3: cooling the alloy liquid to 400°C, adding mechanically alloyed copper-nickel graphite powder to the alloy liquid while stirring; ...

Embodiment 2

[0079] This embodiment provides a tin-based babbitt alloy, which contains: 7% antimony, 9% copper, 3% nickel, 1% graphite, and 80% tin by weight percentage.

[0080] The preparation method of the tin-based babbitt alloy of the present embodiment may further comprise the steps:

[0081] Step 1: take by weighing the copper powder that massfraction is 6%, the nickel-coated graphite powder of 4% (nickel massfraction is 75%), particle size is 1500 meshes, copper powder and nickel-coated graphite powder are mixed in ball mill, ball material ratio 5:1, ball mill speed 180 rpm, ball milling time 4 hours;

[0082] Step 2: put 7% antimony block, 3% copper block, and 80% tin block into a graphite crucible, heat until the metal melts, use electromagnetic stirring and mechanical stirring to homogenize the components, exhaust and remove slag;

[0083] Step 3: cooling the alloy liquid to 380°C, adding mechanically alloyed copper-nickel graphite powder to the alloy liquid while stirring;

...

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Abstract

The invention discloses a Sn matrix babbitt alloy and a preparing method and a purpose thereof. The alloy comprises, by mass percent, 5 to 15% of antimony, 6 to 12% of copper, 3 to 9% of nickel, 1 to3% of graphite and 61 to 85% of tin. The Sn matrix babbitt alloy has the self lubricating effect, the friction coefficient is low, the preparing method of the Sn matrix babbitt alloy is provided, thecharacteristic that a Cu-Ni solid solution generated by mechanical alloying is large in proportion is used, upward floating of small-granularity graphite in the smelting process is restrained, composition segregation is avoided, meanwhile, affinity of the Cu-Ni solid solution and a copper base phase in a casting ingot can be used, continuity of graphite and a matrix can be reinforced, binding strength of the graphite and the matrix can be improved, and whole falling of the graphite in the use process can be prevented.

Description

technical field [0001] The invention relates to a tin-based babbitt alloy and a preparation method thereof, in particular to a tin-based babbitt alloy and a preparation method and application thereof. Background technique [0002] Tin-based Babbitt alloy is one of the commonly used materials for sliding bearings, mainly composed of elements such as tin, antimony, and copper. Among them, tin as a soft matrix makes the alloy have very good embedding, compliance and anti-seizure properties. In the process of being used as a bearing bush, the lubricating oil can enter the dent of the matrix; while the convex tin antimony, tin Hard phases such as copper that are solid-dissolved in the tin matrix play a role in supporting external forces, which is beneficial to the alloy's good bearing capacity during work. After the babbitt alloy is in service, the soft matrix in the tissue is concave and the hard phase is convex, forming a small gap between the sliding surfaces, which becomes t...

Claims

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Application Information

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IPC IPC(8): C22C13/02C22C1/10C22C1/02F16C33/12
CPCC22C1/1036C22C13/02F16C33/121
Inventor 龙伟民郝庆乐钟素娟张雷秦建常云峰董宏伟王冰
Owner CHINA INNOVATION ACADEMY OF INTELLIGENT EQUIP CO LTD
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