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Rareearth lead based grid alloy and mfg. process thereof

A preparation process and alloy technology are applied in the field of rare earth lead substrate grid alloy and its preparation process, which can solve the problems of high environmental damage, high price, inability to improve strength and corrosion resistance at the same time, and achieve improved mechanical properties and specific energy. , the effect of improving electrochemical performance

Inactive Publication Date: 2003-10-29
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of these added elements are expensive, such as Ag; some are more harmful to the environment, such as As; some cannot improve strength and corrosion resistance at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: First, 0.02% by weight of Y, 1.2% of Sn and 98.76% of Pb are smelted at 650°C; then, after each element is melted, 0.02% by weight of Ca is added in the alloy melt; finally, after the Ca is completely melted, the alloy liquid is poured into the metal fast cooling mold, and the cooling rate of the alloy liquid is controlled at 10 2 The k / s can be cooled to room temperature. The rare earth lead substrate gate alloy prepared according to the preparation process of this embodiment contains: 0.02% Ca, 1.2% Sn, 0.02% Y and 98.76% Pb.

Embodiment 2

[0009] Example 2: First, 0.06% by weight of Ce, 0.4% of Sn and 99.45% of Pb are smelted at 400°C; then, after each element is melted, 0.09% by weight of Ca is added by pressing method in the alloy melt; finally, after the Ca is completely melted, the alloy liquid is poured into the metal fast cooling mold, and the cooling rate of the alloy liquid is controlled at 10 5 The k / s can be cooled to room temperature. The rare earth lead substrate gate alloy prepared according to the preparation process of this embodiment contains: 0.09% Ca, 0.4% Sn, 0.06% Ce and 99.45% Pb.

Embodiment 3

[0010] Example 3: First, 0.04% by weight of La, 0.8% of Sn and 99.11% of Pb are smelted at 450°C; then, after each element is melted, 0.05% by weight of Ca is added in the alloy melt; finally, after the Ca is completely melted, the alloy liquid is poured into the metal fast cooling mold, and the cooling rate of the alloy liquid is controlled at 10 3 k / s can be cooled to room temperature, and the rare earth lead substrate gate alloy prepared according to the preparation process of this embodiment contains: 0.05% Ca, 0.8% Sn, 0.04% La and 99.11% Pb.

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Abstract

A Pb-base RE alloy used for grid electrode of lead-acid accumulator is prepared through smelting the mixture of RE (0.02-0.06 wt.%), Sn (0.4-1.2 wt.%) and Pb (98.65-99.56 wt.%) at 400-650 deg.C, adding Ca (0.02-0.09 wt.%), casting and fast cooling. Its advantages are high tension strenth (45 MPa) and high corrosion resistance in sulfuric acid.

Description

1. Technical field [0001] The invention belongs to material engineering, in particular to a rare earth lead substrate grid alloy and a preparation process thereof. 2. Background technology [0002] The grid is a key component of the lead-acid battery, which has a decisive impact on the performance of the battery. Lead-antimony alloy was once the basic material for making grids. However, it is facing elimination because it cannot meet the maintenance-free requirements. At present, the materials for manufacturing grids worldwide mainly include low-antimony lead-antimony alloys, lead-calcium alloys, and lead-calcium-tin series alloys. Especially lead-calcium-tin series alloys have become the current research focus and development direction. In order to further improve the performance of lead-calcium-tin series alloys, various elements can be added to the alloys. The more popular elements include Al, Ag, Bi, Se, As, Sr and other elements. Some of these added elements are ex...

Claims

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Application Information

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IPC IPC(8): C22C11/06H01M4/68H01M4/73
CPCY02E60/10
Inventor 周根树李夏河郑茂盛李党国杨乐中魏建锋徐可为
Owner XI AN JIAOTONG UNIV
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