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Method for producing metallic tin powder for friction material

一种生产方法、摩擦材料的技术，应用在冶金领域，能够解决锡粉末和锡粉末易结块、金属损失、重金属中毒等问题，达到经济效益显著、工作环境改善、身心健康保证的效果

Active Publication Date: 2016-08-17
CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the metal tin powder produced by the atomization method is easily oxidized and deteriorated when exposed to the air, vacuum packaging is used, but the products produced under the existing production technology conditions have the following problems: 1. Vacuum packaging is prone to various leaks 2. Due to the difference in internal and external pressure in vacuum packaging, tin powder and tin powder are easy to agglomerate; 3. The reprocessing of oxidized and agglomerated powder will increase a lot of cost, and at the same time, the volatilization and flying of powder will cause Metal loss, volatilization and flying can also easily cause heavy metal poisoning

Method used

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  • Method for producing metallic tin powder for friction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for producing metal tin powder for friction materials, the steps are as follows:

[0018] a. Dissolve in a metal melting furnace to obtain a metal tin liquid flow, and the temperature of the molten tin liquid is controlled at 300-310°C;

[0019] b. The metal tin liquid flow diameter added in the atomization process is 2.5-2.8mm; the pressure is 0.6-0.7Mpa, and the air flow is 7.5-8.2m 3 The high-pressure air of / min is fed into the atomizing equipment to atomize the metal tin liquid flow, and simultaneously feeds the benzotriazole additive, and the added amount of the benzotriazole additive accounts for 10% of the metal liquid flow weight entering the atomizing equipment 0.006%~0.007%, the adding temperature of the benzotriazole additive is 264~275°C, and the pressure is 0.8~0.95 standard atmospheric pressure;

[0020] c. Cool to normal temperature and collect powder;

[0021] d. Sieved, packaged into bags for standby or for sale.

[0022] The above method h...

Embodiment 2～6

[0023] Embodiment 2~6: Produce metal powder according to following steps and process, all the other are the same as embodiment 1.

[0024]

[0025] The metal tin powder prepared by the above method has an oxidative deterioration rate of only 1.0-3.5%, is conventionally packaged, and has remarkable economic benefits; and the preparation process has good safety.

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Abstract

The invention discloses a method for producing metallic tin powder for a friction material. The method comprises the steps such as metal melting and atomization; in the metal melting process, the temperature of a molten metallic tin liquid is controlled to be 295-310 DEG C; in the atomization process, a 1H-benzotriazole additive is added, and the adding amount of the 1H-benzotriazole additive accounts for 0.005-0.008% of the weight of the molten metallic tin liquid; and the flow rate of high-pressure airflow injected in the atomization process is controlled to be about 7-8.2 m<3> / min. According to the method, a kind of additive is selected for metallic tin powder production based on atomization; by utilization of the own properties of the additive, the interaction between the additive and metal, as well as the favorable environment of atomization, the additive can be gasified and a protection layer resisting oxidation and agglomeration can be formed on the surface of the metallic tin powder; metallic tin powder products produced according to the method can be packed conventionally, and the oxidative deterioration rate of the metallic tin powder products can be effectively controlled to be 0.8-3.5%; and through the conventional packing, the production cost is effectively reduced, the production system safety is high, the refund rate is greatly reduced, and the economic benefit is remarkable.

Description

[0001] The present invention application is a divisional application for the invention patent with application number 201110385490.8 and application date of November 28, 2011. technical field [0002] The invention relates to a production method of metal powder, in particular to a production method of metal tin powder suitable for the field of friction materials, and belongs to the technical field of metallurgy. Background technique [0003] The production of metal tin powder adopts the gas atomization method. The basic production process is as follows: the first step is to melt the metal, and the melting temperature is 50°C to 100°C higher than the melting point of the metal; the second step is to use 0.3 MP~1.2MP high-pressure air atomizes the metal liquid flow to produce powder that meets the corresponding specifications and requirements; the third step is to cool and collect the powder; the fourth step is to sieve the cooled powder; the fifth step is to vacuum pack the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082
Inventor 陈林马才明莫正彬
Owner CHONGQING YOUYAN ZHONGYE NEW MATERIAL