Unlock instant, AI-driven research and patent intelligence for your innovation.

Industrial pure tin with resistance to liquid surface oxidizing and application

A surface oxidation, industrially pure technology, applied in the direction of manufacturing tools, metal processing equipment, welding media, etc., can solve the problems of inclusion pollution in the solder pool, poor welding, and easy adhesion of tin slag to the soldered joints, etc. , to achieve the effect of improving the antioxidant properties

Inactive Publication Date: 2004-03-17
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process produces tin slag very quickly. A common wave soldering machine can lose as much as several kilograms of tin every day due to oxidized tin slag. These surface scums not only lose a large amount of solder, but also cause solder pool damage. Inclusion pollution requires continuous manual slag removal to make the wave soldering machine operate normally. Otherwise, the tin slag floating or deposited in the solder pool is easy to adhere to the solder joints, resulting in poor welding , micro-soldering and other welding defects, therefore, how to reduce the oxidation of the solder surface in the molten state is the key technology to be solved in the wave soldering process and one of the main technical ways to reduce production costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Industrial pure tin with resistance to liquid surface oxidizing and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The industrial No. 1 tin is used as a raw material, and a trace element of 0.05% Ge (weight percentage, the same below) is added to prepare a liquid-resistant surface oxide tin. Take 100g sample and place it in a graphite crucible with a diameter of 20mm to heat and melt it, and heat it up to 250°C to keep it warm. After gently scraping off a layer of film on the surface with a scraper, observe the oxidation on the surface of the liquid metal melt. Just after scraping off the surface film, the liquid metal surface is very bright. It is convenient to estimate its anti-oxidation degree from the brightness of the metal liquid surface, because once the oxide film is formed, this bright liquid surface will disappear quickly. Through observation, it can be found that the tin added with the above trace elements is heated and kept warm for a long time in the atmosphere, and the surface of the molten tin can still remain bright. When kept at 250°C for 5 hours, the center of the ...

Embodiment 2

[0018] The composition of the prepared sample is 0.03% P, and the rest is industrial pure tin. The test method and procedure are the same as in Example 1. Keep warm at 250°C, the melt surface remains bright for a long time, after 5 hours of oxidation, the center of the liquid surface is still bright, there is a thin oxide film on the edge surface, and there is no further change in color, so the oxidation resistance of this sample is good .

Embodiment 3

[0020] The composition of the prepared sample is 0.05% Sb and 0.02% Ge, and the rest is industrial pure tin. The test method and procedure are the same as in Example 1. Keep warm at 250°C, the melt surface remains bright for a long time, after 5 hours of oxidation, the center of the liquid surface is still bright, there is a thin oxide film on the edge surface, and there is no further change in color, so the oxidation resistance of this sample is good .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides one kind of industrial pure tin resisting liquid surface oxidation. One or several of trace elements Sb, Ag, Zn, P and Ge in the amount of 0.01-0.2 wt% is added into tin so as to raise the oxidation resistance of liquid metal surface in atmosphere condition. This kind of industrial pure tin may be used as material for producing various pure tin products or tin-base alloy, and is especially suitable for preparing various tin-base electronic soldering alloy requiring high liquid metal surface oxidation resisting performance.

Description

Technical field: [0001] The present invention relates to a kind of raw material of industrial pure tin, specifically provides a kind of industrial pure tin of anti-liquid surface oxidation, this kind of industrial pure tin can be used as a kind of raw material for preparing various pure Sn products or tin-based alloys, especially It is suitable for the preparation of tin-based electronic solder alloys to improve the oxidation resistance of their liquid surfaces. Background technique: [0002] Tin is a metal with a wide range of uses, among which tin-based alloys are mainly used in the preparation of solder and bearing materials. In recent years, due to the rapid development of the electronic industry, the proportion of tin used in electronic solder is rising rapidly. At the same time, after nearly 30 years of continuous technological progress, modern microelectronic packaging technology has established and developed some new welding technologies perfectly to meet the product...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/26C22C13/00
Inventor 冼爱平郭建军尚建库
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI