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A processing technology of high-strength tin powder

A processing technology, high-strength technology, applied in the field of metal powder, can solve the problems of metal powder performance defects, single process, etc.

Active Publication Date: 2021-06-01
赣州白塔金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation process of the above-mentioned patented metal powder generally has a single preparation process, resulting in defects in the performance of the metal powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of processing technology of high-strength tin powder, its processing method comprises the following steps:

[0021] (1) Melting: Melting metal tin ingots at a high temperature of 620°C to form a molten state;

[0022] (2) One-stage granulation: The molten metal tin water is passed into the extruder, and the tin water in the molten state is extruded to form granules. When the tin water is extruded in the extruder, nitrogen is used for protection. The particles are cooled and shaped in the cold water tank. The cold water in the cold water tank uses normal temperature flowing water to cool and shape the tin particles. The water temperature is 10°C, the flow rate is 0.2m / s, and the pressure of the extruder is 560Mpa. molten state;

[0023] (3) Two-stage coarse powdering: The first-stage granulated tin particles in the molten state are cooled and shaped again under a high-pressure water gun. The water pressure of the water gun is 3Mpa to form coarse powder tin powder...

Embodiment 2

[0027] A kind of processing technology of high-strength tin powder, its processing method comprises the following steps:

[0028] (1) Melting: Melting metal tin ingots at a high temperature of 620°C to form a molten state;

[0029] (2) One-stage granulation: The molten metal tin water is passed into the extruder, and the tin water in the molten state is extruded to form granules. When the tin water is extruded in the extruder, nitrogen is used for protection. The particles are cooled and shaped in the cold water tank. The cold water in the cold water tank uses normal temperature flowing water to cool and shape the tin particles. The water temperature is 10°C, the flow rate is 0.35m / s, and the pressure of the extruder is 700Mpa. molten state;

[0030] (3) Two-stage coarse powdering: The first-stage granulated tin particles in the molten state are cooled and shaped again under a high-pressure water gun. The water pressure of the water gun is 5Mpa to form coarse powder tin powde...

Embodiment 3

[0034] A kind of processing technology of high-strength tin powder, its processing method comprises the following steps:

[0035] (1) Melting: Melting metal tin ingots at a high temperature of 620°C to form a molten state;

[0036] (2) One-stage granulation: The molten metal tin water is passed into the extruder, and the tin water in the molten state is extruded to form granules. When the tin water is extruded in the extruder, nitrogen is used for protection. The particles are cooled and shaped in the cold water tank. The cold water in the cold water tank uses normal temperature flowing water to cool and shape the tin particles. The water temperature is 15°C, the flow rate is 0.5m / s, and the pressure of the extruder is 800Mpa. molten state;

[0037] (3) Two-stage coarse powdering: The first-stage granulated tin particles in the molten state are cooled and shaped again under a high-pressure water gun. The water pressure of the water gun is 7Mpa to form coarse powder tin powder...

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Abstract

The invention discloses a processing technology for high-strength tin powder. The process includes melting, one-stage granulation, two-stage coarse powderization, three-stage fine powderization, and screening. The process combines various technical means to process tin The powder is repeatedly formed and melted to replace the traditional one-time forming tin powder process, which makes the processed tin powder more delicate and its performance is greatly improved.

Description

technical field [0001] The invention relates to the field of metal powder, in particular to a processing technology of high-strength tin powder. Background technique [0002] There are currently methods for producing tin powder: restricted nozzle gas atomization method, high-pressure water atomization method, ultrasonic standing wave atomization method, solid-state phase change method, and multi-stage atomization method. Each process has different defects and Therefore, the tin powder produced has performance defects. [0003] The invention with the patent application number CN200810048457.4 provides a method for making tin powder for organotin production, using high-pressure water atomization method, specifically: using a 15kW intermediate frequency stainless steel heating tube to melt metal tin ingots in a carbon steel container; Discharge the molten metal tin from the carbon steel container into the cold water tank; when the temperature of the molten tin water reaches 24...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
CPCB22F9/08B22F2999/00B22F2201/02
Inventor 肖祖海
Owner 赣州白塔金属材料有限公司
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