Cold-rolled strip for high-precision spring and production method thereof

A cold-rolled steel strip, high-precision technology, applied in the direction of improving process efficiency, can solve the problems of small spring tension reduction, spring spring easily broken, affecting comprehensive performance, etc., to achieve easy cold rolling and not easy to crack , the effect of long service life

Inactive Publication Date: 2013-03-27
无锡舜特精密合金板带有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcoming of the bell furnace annealing process with a small down-pressure rate is that due to the need for more than ten hours of 700-degree high-temperature heat preservation annealing, it is easy to cause the precipitation of graphite carbon, which affects the comprehensive performance of the spring spring after quenching, making the spring The elastic tension of the mainspring is small, therefore, the spring mainspring processed with cold-rolled steel strip is easy to break and has a short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] First select 96.53 parts by weight of steel scrap, 0.25 parts by weight of molybdenum, 0.15 parts by weight of niobium and 0.10 parts by weight of vanadium for use.

[0041] The first step is to smelt

[0042] Bake the scrap iron and steel first to remove the moisture therein.

[0043] Afterwards, scrap iron and steel that does not contain moisture is put into an intermediate frequency electric arc furnace to be smelted into a molten metal.

[0044] Afterwards, carry out pre-stove analysis and carry out element adjustment, make the following elements in metal solution account for the weight % of metal solution gross weight respectively:

[0045] Carbon 0.58% by weight

[0046] Silicon 1.60% by weight

[0047] Manganese 0.60% by weight

[0048] Phosphorus 0.030% by weight

[0049] Sulfur 0.030% by weight;

[0050] Chromium 0.10% by weight;

[0051] Nickel 0.12% by weight.

[0052] After that, the metal solution is poured into a vacuum induction furnace, and molyb...

Embodiment 2

[0067] First select 94.98 parts by weight of steel scrap, 0.35 parts by weight of molybdenum, 0.25 parts by weight of niobium and 0.20 parts by weight of vanadium for use.

[0068] The first step is to smelt

[0069] Bake the scrap iron and steel first to remove the moisture therein.

[0070] Afterwards, scrap iron and steel that does not contain moisture is put into an intermediate frequency electric arc furnace to be smelted into a molten metal.

[0071] Afterwards, carry out pre-stove analysis and carry out element adjustment, make the following elements in metal solution account for the weight % of metal solution gross weight respectively:

[0072] Carbon 0.66% by weight

[0073] Silicon 1.90% by weight

[0074] Manganese 0.90% by weight

[0075] Phosphorus 0.005% by weight

[0076] Sulfur 0.005% by weight;

[0077]Chromium 0.35% by weight;

[0078] Nickel 0.35% by weight.

[0079] After that, the metal solution is poured into a vacuum induction furnace, and molybd...

Embodiment 3

[0094] First select 95.80 parts by weight of steel scrap, 0.30 parts by weight of molybdenum, 0.20 parts by weight of niobium and 0.15 parts by weight of vanadium for use.

[0095] The first step is to smelt

[0096] Bake the scrap iron and steel first to remove the moisture therein.

[0097] Afterwards, scrap iron and steel that does not contain moisture is put into an intermediate frequency electric arc furnace to be smelted into a molten metal.

[0098] Afterwards, carry out pre-stove analysis and carry out element adjustment, make the following elements in metal solution account for the weight % of metal solution gross weight respectively:

[0099] Carbon 0.62% by weight

[0100] Silicon 1.75% by weight

[0101] Manganese 0.75% by weight

[0102] Phosphorus 0.014% by weight

[0103] Sulfur 0.016% by weight;

[0104] Chromium 0.22% by weight;

[0105] Nickel 0.18% by weight.

[0106] After that, the metal solution is poured into a vacuum induction furnace, and molyb...

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PUM

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Abstract

The invention relates to a cold-rolled strip for a high-precision spring and a production method of the cold-rolled strip. The cold-rolled strip for the high-precision spring is characterized by being manufactured through the steps of performing smelting, hot rolling, acid cleaning, cold rolling and the like on raw materials such as waste iron, steel, molybdenum, niobium and vanadium scraps. The spring which is processed by using the cold-rolled strip is difficult to fracture, has a long service life and is suitable for the production fields of clocks, mechanical toys, household appliances (such as washing machines and dust collectors), measuring tapes, automobile safety belts and the like.

Description

technical field [0001] The invention relates to a steel strip and a preparation method thereof. Specifically, it is a cold-rolled steel strip for producing high-precision spring springs and a preparation method thereof. It is suitable for the production fields of clocks and watches, motor toys, household appliances (washing machines, vacuum cleaners, etc.), tape measures, and car safety belts. Background technique [0002] It is known in the metallurgical industry that cold-rolled steel strips for spring springs are mainly used in the production fields of watches, motor toys, household appliances (washing machines, vacuum cleaners, etc.), measuring tapes, and car safety belts. At present, the cold-rolled steel strips for high-precision spring springs mainly include 60 silicon 2 manganese, 60 silicon 2 manganese A, 60 silicon 2 chromium A, and 60 silicon 2 chromium vanadium A. The above four types of cold-rolled steel strips for spring springs The production process is: sme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/48C22C33/04C21D8/02
CPCY02P10/20
Inventor 李纲
Owner 无锡舜特精密合金板带有限公司
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