Method for preparing aluminum bronze powder by water atomization

A technology of aluminum bronze and water atomization, which is applied in the field of preparing aluminum bronze powder by water atomization, and can solve problems such as environmental pollution

Inactive Publication Date: 2013-04-17
PUJIANG HUIKAI POWDER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, in view of the above-mentioned defects existing in the current prior art, it is necessary to carry out research to provide a solution to solve the defects existing in the prior art and to avoid the damage caused by the lead-containing antifriction coating material in the traditional engine bearings. environmental pollution

Method used

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  • Method for preparing aluminum bronze powder by water atomization

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Embodiment 1

[0033] A method for preparing aluminum bronze powder by water atomization, comprising the following steps:

[0034] (1) Select the weight percentage of raw materials as follows: No. 1 electrolytic copper 92%, A00 aluminum ingot 8%, use 0.25T intermediate frequency melting furnace to weigh 230Kg of No. 1 electrolytic copper, A00 aluminum ingot 20Kg, add the raw materials that have been weighed Smelting in the air atmosphere in the intermediate frequency melting furnace, the melting temperature is 1250 ℃.

[0035] (2) After smelting, carry out chemical refining deoxidation and rake slag.

[0036] (3) Measure and control the composition of the alloy liquid, control the weight percentage of Cu to 91-93%, and the weight percentage of Al to 7-9%, and then add a covering agent and keep the temperature at 1220-1250°C.

[0037] (4) Remove the slag on the surface of the alloy liquid, inject the alloy liquid into the leakage bag, the diameter of the leakage hole is 4mm, use the free-fal...

Embodiment 2

[0043] A method for preparing aluminum bronze powder by water atomization, comprising the following steps:

[0044] (1) Cu with 90.5% by weight and 9.5% aluminum Al are added to the smelting furnace, smelted at normal pressure and a temperature of 1250°C to form an alloy liquid, wherein the total weight of the above-mentioned Cu, Al and total impurities is 100 %.

[0045] (2) Carry out chemical refining deoxidation and raking slag treatment on the alloy liquid.

[0046] (3) Measure and control the composition of the alloy liquid, control the weight percentage of Cu to be 91-93% and the weight percentage of Al to be 7-9%, and then add a covering agent and keep the temperature at 1220-1250°C.

[0047] (4) Remove the slag on the alloy liquid surface, inject the alloy liquid into the leakage bag, and under the protection of an inert gas, use a free-fall nozzle to atomize at a water pressure of 3MPa and a water temperature of 45°C to form alloy powder, wherein The leak hole diame...

Embodiment 3

[0053] A method for preparing aluminum bronze powder by water atomization, comprising the following steps:

[0054] (1) Add 93.5Cu and 6.5% Al by weight into a smelting furnace, and smelt under normal pressure at a temperature of 1250° C. to form an alloy liquid, wherein the total weight of the above-mentioned Cu, Al and total impurities is 100%.

[0055] (2) Carry out chemical refining deoxidation and raking slag treatment on the alloy liquid.

[0056] (3) Measure and control the composition of the alloy liquid, control the weight percentage of Cu to be 91-93% and the weight percentage of Al to be 7-9%, and then add a covering agent and keep the temperature at 1220-1250°C.

[0057] (4) Remove the slag on the alloy liquid surface, inject the alloy liquid into the leakage bag, and under the protection of inert gas, use a free-fall nozzle to atomize at a water pressure of 5MPa and a water temperature of 48°C to form alloy powder, wherein The leak hole diameter of the leak bag i...

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Abstract

An embodiment of the invention discloses a method for preparing aluminum bronze powder by water atomization. The method includes the steps: smelting 90.5-93.5% of Cu and 6.5-9.5% of Al to form alloy liquid under normal pressure at the temperature of 1250 DEG C; performing chemical refining deoxidation and slag raking; measuring and controlling components, adding covering agents into the alloy liquid and keeping the temperature at 1220-1250 DEG C in a standing manner; pouring the alloy liquid into a leakage ladle, atomizing the alloy liquid under the water pressure of 3-5MPa and at the water temperature of 45-50 DEG C by a free-fall nozzle under protection of inert gas to form alloy powder; dewatering and drying the alloy powder; and screening the alloy powder to obtain the aluminum bronze alloy powder with -150-+350 meshes. The aluminum bronze powder prepared by the method can serve as an anti-friction coating material in an engine sliding bearing, and environmental pollution caused by leaded anti-friction coating material is avoided.

Description

technical field [0001] The invention belongs to the technical field of alloy powder preparation, in particular to a method for preparing aluminum bronze powder by water atomization. Background technique [0002] In the prior art, lead-containing metal powders are often used as antifriction coating materials in engine sliding bearings, such as CuPb10Sn10, CuPb30, CuPb24Sn4, CuPb24Sn, CuPb3Sn6Zn6, etc. Lead is a toxic heavy metal. From the perspective of protecting the environment, the use of lead in the copper-lead alloy antifriction coating used in the engine sliding bearing manufacturing industry must be limited. At present, the European Union and the United States have developed high-performance lead-free anti-friction coating materials that meet the requirements of engines. In our country, the lead-free work of automobile engine bearing materials has just started, and the corresponding laws and regulations are still being discussed and formulated. The production process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 吴棕洋张文革
Owner PUJIANG HUIKAI POWDER TECH
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