Method for producing lead-base alloy grid for lead-acid battery
AssigneeThe Furukawa Battery Co., Ltd.
InventorsJun Furukawa, Kazuo Matsushita
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Abstract
The present invention relates to a method for producing a lead-base alloy grid for lead-acid battery having excellent mechanical strength, corrosion resistance and growth resistance, including two-step heat treatment of a Pb—Ca—Sn alloy grid containing 0.06% by mass or less of calcium, the first heat treatment being conducted at a temperature of 40° C. to 110° C., the second heat treatment being conducted at a temperature of 90° C. to 140° C., and the first heat treatment being conducted at a lower temperature than the second heat treatment.
Claims3
A method for producing a lead-base alloy grid for a lead-acid battery, comprising:
- casting a Pb—Ca—Sn alloy grid containing 0.06% by mass or less of calcium,
- performing natural aging of the Pb—Ca—Sn alloy grid, and
- performing heat treatment of the Pb—Ca—Sn alloy grid after conducting the natural aging, the heat treatment being conducted in a two step process including a first heat treatment step and a second heat treatment step,
- wherein the first heat treatment step is conducted at a temperature of 40° C. to 110° C. for a period of at least 0.5 hours,
- wherein the second heat treatment step is conducted at a temperature of 90° C. to 140° C. for a period of 0.5 hours to 10 hours,
- wherein the first heat treatment step is conducted at a lower temperature than the second heat treatment step, and
- wherein the natural aging is conducted for a period of 0.5 hours to about 3 hours.
Dependencies are inferred from the claim text.