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Tin-lead alloy and preparation process thereof

A technology of tin-lead alloy and preparation process, which is applied in the field of tin-lead alloy and its preparation process, to achieve the effect of simple process, easy operation, and protection of equipment safety

Inactive Publication Date: 2021-04-16
HANGZHOU CHUNJIANG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for quicker and more accurate melts with lower temperatures compared to existing methods like solder or weldable materials used on plastic containers such as gas cylinders.

Problems solved by technology

This patented describes different ways to store or release hydrogen from metal hydride (MH) materials like lithium borate (LiB). These techniques include storing hydrogen directly into MH by compressing them together without refrigerating them before use. However, these conventional processes require expensive equipment and slow down their operation due to heat generated during compression. To address this problem, researches were conducted exploring new alloys containing specific elements added to improve its properties.

Method used

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  • Tin-lead alloy and preparation process thereof
  • Tin-lead alloy and preparation process thereof
  • Tin-lead alloy and preparation process thereof

Examples

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Embodiment 1

[0036] A tin-lead alloy in this embodiment includes the following raw materials in parts by weight: 2 parts of tin, 30 parts of lead, and 40 parts of bismuth.

[0037] A kind of tin-lead alloy of the present embodiment and preparation technology thereof, comprise the steps:

[0038] (1) Taking 106°C as the application temperature and based on the tin-lead binary phase diagram, select 2 parts by weight of tin; the purity of the tin is ≥99.8%, the purity of the lead is ≥99.8%, and the purity of the bismuth is ≥99.8% %, the purity of antimony and indium is ≥99.8%. Lead and tin metals are granular and 20mm in size.

[0039] (2) According to the required pressure greater than 77MPa, select 30 parts by weight of lead and 40 parts of bismuth from the low melting point alloy;

[0040] (3) Put the metal raw materials in the above weight parts into the smelting furnace, adjust the smelting temperature to 700°C for smelting, and stir and melt;

[0041] (4) Adjust the melting temperatu...

Embodiment 2

[0046] A tin-lead alloy in this embodiment includes the following raw materials in parts by weight: 3 parts of tin, 40 parts of lead, and 50 parts of bismuth.

[0047] A kind of tin-lead alloy of the present embodiment and preparation technology thereof, comprise the steps:

[0048] (1) Taking 110°C as the application temperature and based on the tin-lead binary phase diagram, select 3 parts by weight of tin; the purity of the tin is ≥99.8%, the purity of the lead is ≥99.8%, and the purity of the bismuth is ≥99.8% %, the purity of antimony and indium is ≥99.8%. Lead and tin metals are granular and 28mm in size.

[0049] (2) According to the required pressure greater than 77MPa, select 40 parts by weight of lead and 50 parts of bismuth from the low melting point alloy;

[0050] (3) Put the metal raw materials in the above weight parts into the smelting furnace, adjust the smelting temperature to 750°C for smelting, and stir and melt;

[0051](4) Adjust the melting temperatur...

Embodiment 3

[0056] A tin-lead alloy in this embodiment includes the following raw materials in parts by weight: 5 parts of tin, 45 parts of lead, and 60 parts of bismuth.

[0057] A kind of tin-lead alloy of the present embodiment and preparation technology thereof, comprise the steps:

[0058] (1) Taking 115°C as the application temperature and based on the tin-lead binary phase diagram, select 5 parts by weight of tin; the purity of the tin is ≥99.8%, the purity of the lead is ≥99.8%, and the purity of the bismuth is ≥99.8% %, the purity of antimony and indium is ≥99.8%. Lead and tin metals are in granular form with a size of 40mm.

[0059] (2) According to the required pressure greater than 77MPa, select 45 parts by weight of lead and 60 parts of bismuth from the low melting point alloy;

[0060] (3) Put the metal raw materials in the above weight parts into the smelting furnace, adjust the smelting temperature to 800°C for smelting, and stir and melt;

[0061] (4) Adjust the meltin...

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Abstract

The invention provides a tin-lead alloy and a preparation process thereof, and relates to the technical field of metal alloys. The process comprises the following steps that the following materials including, by weight, 2-5 parts of tin, 30-45 parts of lead and 40-60 parts of bismuth are selected by taking the temperature 106 DEG C-115 DEG C as an application temperature and taking a tin-lead binary phase diagram as the basis; the above raw materials into a smelting furnace, the smelting temperature is adjusted to 700 DEG C-800 DEG C for refining, and stirring and melting are conducted; the smelting temperature is adjusted to 300 DEG C-350 DEG C, stirring is conducted till all the materials are molten, surface layer drossing is removed, and metal hot melt is obtained after standing is conducted; the hot melt material is filtered, then the filtered hot melt material is put into a casting mold, and cooling is conducted to obtain a metal ingot; the metal ingot is machined into a standard sample size; and an alloy valve core sample is loaded into a hydrogen valve for melting point and pressure testing. The tin-lead alloy has high compressive strength, the temperature range of the melting point of the tin-lead alloy is small, a tin-lead alloy valve element can work for a long time under the pressure larger than 77 MPa, and the tin-lead alloy valve element cannot be broken or deformed when the instantaneous pressure reaches 87.5 MPa.

Description

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Claims

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Application Information

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Owner HANGZHOU CHUNJIANG VALVE
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