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High-spreadability tin-antimony-rare earth lead-free solder alloy and preparation method thereof

A lead-free solder alloy and spreadability technology, applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve the problems of high melting point, limited spreading performance, and restrictions on the wide use of materials, and achieve low melting point, Guarantee the performance of welding process and facilitate the effect of industrialized production

Active Publication Date: 2012-01-18
江苏渝鑫科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solder alloy has a high melting point and limited spreading properties, thus limiting the material's widespread use

Method used

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  • High-spreadability tin-antimony-rare earth lead-free solder alloy and preparation method thereof
  • High-spreadability tin-antimony-rare earth lead-free solder alloy and preparation method thereof
  • High-spreadability tin-antimony-rare earth lead-free solder alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw materials are formulated according to the following mass percentages: Sb7wt%, In0.01wt%, Bi1wt%, Cd0.01wt%, Sm0.01wt%, Nd0.01wt%, and the balance is Sn.

[0021] The above raw materials are melted in a vacuum induction furnace at a melting temperature of 520°C to obtain a master alloy, and then put into a remelting tubular crucible in a vacuum induction quenching furnace for remelting at a remelting temperature of 360°C. The bottom of the tubular crucible is placed 2-4mm above the rim of the runner of the quenching furnace. The above-mentioned master alloy is placed in the tubular crucible and melted. The spray is in contact with the edge of the rotating runner to form an alloy strip with a thickness of 200-250 microns and a width of 3-6 mm; the rotational speed of the rim of the runner is 12m / s; then the alloy strip is pulverized and then placed After grinding in a ball mill for 20 minutes, take out and sieve, and take and sieve to obtain alloy particles with a...

Embodiment 2

[0023] The raw materials are formulated according to the following mass percentages: Sb9wt%, In0.03wt%, Bi3wt%, Cd0.03wt%, Sm0.03wt%, Nd0.03wt%, and the balance is Sn.

[0024] The above raw materials are melted in a vacuum induction furnace at a melting temperature of 510°C to obtain a master alloy, and then put into a remelting tubular crucible in a vacuum induction quenching furnace for remelting at a remelting temperature of 370°C. The bottom of the tubular crucible is placed 2-4mm above the rim of the runner of the quenching furnace. The above-mentioned master alloy is placed in the tubular crucible and melted. The spray is in contact with the edge of the rotating runner to form an alloy strip with a thickness of 200-250 microns and a width of 3-6 mm; the rotational speed of the rim of the runner is 12m / s; then the alloy strip is pulverized and then placed After grinding in a ball mill for 20 minutes, take out and sieve, and take and sieve to obtain alloy particles with a...

Embodiment 3

[0026] The raw materials are formulated according to the following mass percentages: Sb8wt%, In0.02wt%, Bi2wt%, Cd0.02wt%, Sm0.02wt%, Nd0.02wt%, and the balance is Sn.

[0027] The above raw materials are melted in a vacuum induction furnace at a melting temperature of 520°C to obtain a master alloy, and then put into a remelting tubular crucible in a vacuum induction quenching furnace for remelting at a remelting temperature of 360°C. The bottom of the tubular crucible is placed 2-4mm above the rim of the runner of the quenching furnace. The above-mentioned master alloy is placed in the tubular crucible and melted. The spray is in contact with the edge of the rotating runner to form an alloy strip with a thickness of 200-250 microns and a width of 3-6 mm; the rotational speed of the rim of the runner is 13m / s; then the alloy strip is pulverized and then placed After grinding in a ball mill for 15 minutes, take out and sieve, and take and sieve to obtain alloy particles with a...

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Abstract

The invention belongs to the field of metal materials, in particular to a high-spreadability tin-antimony-rare earth lead-free solder alloy and a preparation method thereof. The alloy is prepared from the following raw materials in percentage by weight: 7.0 to 9.0 percent of Sb, 0.01 to 0.03 percent of In, 1 to 3 percent of Bi, 0.01 to 0.03 percent of Cd, 0.01 to 0.03 percent of Sm, 0.01 to 0.03 percent of Nd and the balance of Sn. The preparation method comprises the following steps of: smelting the raw materials in the ratio in a vacuum induction furnace to obtain a master alloy; remelting in a remelting tubular crucible, wherein the remelting tubular crucible is arranged above a rim of a rotating wheel of a quick quenching furnace, and molten alloy is sprayed through holes with the diameter of 1mm at the bottom of the crucible under the action of argon and forms an alloy strip on the rim of the rotating wheel; properly crushing the alloy strip; and grinding in a ball mill, taking out, and sieving. The alloy has high strength and high spreadability.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a highly spreadable tin-antimony rare earth lead-free solder alloy and a preparation method thereof. Background technique [0002] Existing lead-free solder alloy such as CN200810022476.X No. application provides a kind of silver-free tin-bismuth-copper lead-free solder, the solder is composed of tin, bismuth, copper, rare earth element cerium and nickel, by weight percentage, containing 1-6.5% bismuth, 0.5-0.8% copper, 0.01-0.1% cerium, 0.01-0.2% nickel, and the balance is tin. Weigh refined tin ingots, pure bismuth, and Sn-Cu, Sn- Ce, Sn-Ni intermediate alloy ingots, first melt the tin ingots, and then add pure bismuth, Sn-Cu, Sn-Ce, Sn-Ni intermediate alloy ingots in turn, and pour them into solder ingots or other Shaped solder blanks. The melting point range is controlled within 215-227°C, and the spreading area is 67-79 (Cu:mm2 / 0.2g). The shear strength of solder joints is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C13/02B23K35/26C22C1/02B22F9/04
Inventor 赵浩峰王玲蒋晓龙王倩张燕范乐何素华
Owner 江苏渝鑫科技股份有限公司
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