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Lead-free low-temperature alloy with fusing point of 135+/-2 DEG C and preparation method thereof

A low-temperature alloy and melting point technology, applied in the field of alloys, can solve problems such as endangering human health and environmental pollution, and achieve the effects of low production cost, improved economic value, and uniform composition

Inactive Publication Date: 2013-06-12
TIANJIN BAIRUIJIE WELDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fusible core is the heart of the thermal fuse and the technical core of the thermal fuse production process. Traditional thermal fuses are mostly tin-lead alloys. Lead, a substance harmful to the environment, is harmful to human health during production and use. The environment is very polluted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A lead-free low-temperature alloy used as a fuse core of a thermal fuse and having a melting point of 135±2°C. The raw material composition and weight percentage of the lead-free low-temperature alloy are as follows:

[0031] chemical composition%

sn

Bi

In

Ag

sn 40 Bi 57 In 2 Ag 1

39-41

56-58

1.8-2.2

0.8-1.2

[0032] The above-mentioned method for preparing a lead-free low-temperature alloy used as a fuse core of a thermal fuse and having a melting point of 135±2° C., the steps are:

[0033] Put metal tin into a stainless steel crucible according to the weight ratio, heat it on an electric furnace until the tin melts, then add metal silver at 250-280°C, and then add metal bismuth after the bismuth is melted. Add indium, after melting, add degassing agent to degas and remove slag, cast into a low-temperature alloy rod with a diameter of ? The 5-hole extruded, extruded low-temperature alloy wire with a diame...

Embodiment 2

[0035] A lead-free low-temperature alloy used as a fuse core of a thermal fuse and having a melting point of 135±2°C. The raw material composition and weight percentage of the lead-free low-temperature alloy are as follows:

[0036] Bismuth: 56%;

[0037] Indium: 1.8%;

[0038] Silver: 0.8%;

[0039] Tin: 41.4%.

[0040] The preparation method of the lead-free low-temperature alloy with a melting point of 135±2° C. used as a fuse core of a thermal fuse as described above is the same as in Example 1.

Embodiment 3

[0042] A lead-free low-temperature alloy used as a fuse core of a thermal fuse and having a melting point of 135±2°C. The raw material composition and weight percentage of the lead-free low-temperature alloy are as follows:

[0043] Bismuth: 57%;

[0044] Indium: 2%;

[0045] Silver: 1%;

[0046] Tin: 40%.

[0047] The preparation method of the lead-free low-temperature alloy with a melting point of 135±2° C. used as a fuse core of a thermal fuse as described above is the same as in Example 1.

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PUM

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Abstract

The invention relates to lead-free low-temperature alloy with fusing point of 135+ / -2 DEG C. The lead-free low-temperature alloy is prepared from the following raw materials in percentage by weight: 56-58% of bismuth, 1.8-2.2% of indium, 0.8-1.2% of silver and the balance of tin. The lead-free low-temperature alloy disclosed by the invention contains Sn, Bi, In and Ag, can be used for manufacturing a fusing core of a thermal fuse and has the fusing point of 135+ / -2 DEG C; and the low-temperature alloy is eutectic alloy and has the characteristics of uniform ingredients, narrow fusing point range and wide range of use.

Description

technical field [0001] The invention belongs to the field of alloys, and relates to a lead-free low-temperature alloy, in particular to a lead-free low-temperature alloy used as a fuse core of a thermal fuse, with a melting point of 135±2° C. and a preparation method thereof. Background technique [0002] Fusible core is the heart of the thermal fuse and the technical core of the thermal fuse production process. Traditional thermal fuses are mostly tin-lead alloys. Lead, a substance harmful to the environment, is harmful to human health during production and use. The environment is extremely polluted. [0003] Low-temperature alloys can be used for the protection of electronic circuits in the electronics industry, and are mostly used to make fuse cores for thermal fuses. At present, the manufacturers of low-temperature alloys leading the world's advanced technology are Alpha in the United States and Senju in Japan. [0004] Through searching, the following three published ...

Claims

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Application Information

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IPC IPC(8): C22C12/00C22C1/02
Inventor 黄永利赵世有李洪福付宏宇
Owner TIANJIN BAIRUIJIE WELDING MATERIAL
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