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Lead-free low-temperature alloy having melting point of 80+/-2 DEG C and preparation method for same

A low-temperature alloy and melting point technology, applied in the field of alloys, can solve problems such as harm to 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

[0028] A lead-free low-temperature alloy with a melting point of 80±2°C used as a fuse core for a thermal fuse, and its specific composition is Sn 17 Bi 57 In 26 , the specific composition and weight percentage are as follows:

[0029] chemical composition%

sn

Bi

In

sn 17 Bi 57 In 26

16-18

56-58

25-27

[0030] The preparation method of the lead-free low-temperature alloy with a melting point of 80±2°C used as a fuse core of a thermal fuse as described above, the specific steps are as follows:

[0031] Put metal tin into a stainless steel crucible according to the weight ratio, heat it on the electric furnace until the metal tin melts, then add metal bismuth according to the weight ratio at 250-280°C, and then add metal indium after melting After clearing, add a degassing agent to degas and remove slag, cast it into a low-temperature alloy rod with a diameter of ?25mm, and extrude it with a 100-ton vertical extrusion mach...

Embodiment 2

[0033] A lead-free low-temperature alloy with a melting point of 80±2°C used as a fuse core of a thermal fuse, the specific composition and weight percentage of which are as follows:

[0034] Bismuth (Bi): 56%;

[0035] Indium (In): 25%;

[0036] Tin (Sn): 19%.

[0037] The preparation method of the lead-free low-temperature alloy with a melting point of 80±2° C. used as a fuse core of a thermal fuse as described above is the same as that in Example 1.

Embodiment 3

[0039] A lead-free low-temperature alloy with a melting point of 80±2°C used as a fuse core of a thermal fuse, the specific composition and weight percentage of which are as follows:

[0040] Bismuth (Bi): 57%;

[0041] Indium (In): 26%;

[0042] Tin (Sn): 17%.

[0043] The specific steps of the preparation method of the lead-free low-temperature alloy with a melting point of 80±2° C. used as a fuse core of a thermal fuse as described above are the same as in Example 1.

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PUM

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Abstract

The invention relates to a lead-free low-temperature alloy having a melting point of 80+ / -2 DEG C. The lead-free low-temperature alloy comprises the following raw materials in percentage by weight: 56-58% of bismuth, 25-27% of indium and the balance of tin. The low-temperature alloy disclosed by the invention is a lead-free low-temperature alloy containing Sn, Bi and In, can be used for producing the fusing core of a thermal fuse, and has a melting point of 80+ / -2 DEG C; and the low-temperature alloy is an eutectic alloy, and has the characteristics of being uniform in ingredients, narrow in melting point range, and wide in use range.

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 with a melting point of 80±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 patent documents related to this patent ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C12/00H01H85/06H01H69/02
Inventor 黄永利赵世有李洪福付宏宇
Owner TIANJIN BAIRUIJIE WELDING MATERIAL
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