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A kind of production method of low magnetic flux stainless steel strip

A technology of stainless steel strips and production methods, applied in metal rolling and other directions, can solve problems such as increased manufacturing costs, high raw material prices, and large electromagnetic radiation, and achieve the effects of low manufacturing costs, low magnetic flux, and high success rate

Active Publication Date: 2016-08-24
无锡华生精密材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high nickel content of the SUS304 material, the price of raw materials used to manufacture it is higher, and the manufacturing cost is higher
At the same time, the steel strip made of SUS304 1 / 2H needs to be cold-rolled three times. The number of rolling is more, and the success rate of input and output is smaller, which also increases the manufacturing cost; and each rolling process will produce 1%~3% waste, so the yield is low
In addition, the magnetic flux of SUS304 soft-state material itself is slightly larger than that of SUS301, so the magnetic flux of the shield made of SUS304 1 / 2H steel strip is also larger [magnetic flux is not less than 1.128 (at H=50)], so this The electromagnetic radiation generated by such electronic products as mobile phones with such shielding covers is relatively large, which is likely to affect the health of people near electronic products such as mobile phones using such shielding covers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of production method of low magnetic flux stainless steel band of the present invention comprises the following steps:

[0034] First, select the material

[0035] The 301B billet with low nickel and high manganese of TISCO was selected as the raw material;

[0036] Then, the first rolling

[0037] Put the raw material on a 20-high precision rolling mill with a rolling tension of 250N / mm 2 , the rolling speed is 300m / min, cold rolled into a steel strip with a thickness of 0.30mm;

[0038] After that, do the first wash

[0039] Remove the rolled oil remaining on the surface of the steel strip during rolling at a speed of 80m / min on the degreasing and cleaning unit;

[0040] After that, the first annealing

[0041] Perform the first annealing on the steel strip after the first cleaning on a bright annealing line with a temperature of 1100°C at a speed of 9m / min;

[0042] After that, a second rolling

[0043] Put the steel strip after the first annealing on t...

Embodiment 2

[0055] A kind of production method of low magnetic flux stainless steel band of the present invention comprises the following steps:

[0056] First, select the material

[0057] The 301B billet with low nickel and high manganese of TISCO was selected as the raw material;

[0058] Then, the first rolling

[0059] Put the raw material on a 20-high precision rolling mill with a rolling tension of 600N / mm 2 , the rolling speed is 300m / min, cold rolled into a steel strip with a thickness of 0.29mm;

[0060] After that, do the first wash

[0061] Remove the rolled oil remaining on the surface of the steel strip during rolling at a speed of 120m / min on the degreasing and cleaning unit;

[0062] After that, the first annealing

[0063] Perform the first annealing on the steel strip after the first cleaning on a bright annealing line with a temperature of 1140°C at a speed of 12m / min;

[0064] After that, a second rolling

[0065] Put the steel strip after the first annealing on t...

Embodiment 3

[0077] A kind of production method of low magnetic flux stainless steel band of the present invention comprises the following steps:

[0078] First, select the material

[0079] The 301B billet with low nickel and high manganese of TISCO was selected as the raw material;

[0080] Then, the first rolling

[0081] Put the raw material on a 20-high precision rolling mill with a rolling tension of 425N / mm 2 , the rolling speed is 300m / min, cold rolled into a steel strip with a thickness of 0.295mm;

[0082] After that, do the first wash

[0083] Remove the rolled oil remaining on the surface of the steel strip during rolling at a speed of 100m / min on the degreasing and cleaning unit;

[0084] After that, the first annealing

[0085] Perform the first annealing on the steel strip after the first cleaning on a bright annealing line with a temperature of 1120°C at a speed of 10.5m / min;

[0086] After that, a second rolling

[0087] Put the steel strip after the first annealing...

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Abstract

The invention relates to a production method of a low magnetic flux stainless steel strip. It has successively undergone material selection, first rolling, first cleaning, first annealing, second rolling, second cleaning, second annealing, third cleaning, first tension leveling and second These several steps of secondary tension leveling produce a stainless steel strip with low magnetic flux. Using this production method to manufacture steel strips has a high success rate of input and output, low manufacturing cost, high yield, and low magnetic flux. The radiation is small, and it is not easy to affect the health of people nearby.

Description

technical field [0001] The invention relates to a production method of a stainless steel strip, in particular to a production method of a low magnetic flux stainless steel strip used for manufacturing shielding covers of electronic products such as mobile phones. Background technique [0002] It is known in the production industry of mobile phones and other electronic products that in order to prevent the electromagnetic field generated by the circuits, components and other parts in mobile phones and other electronic products from spreading outward and the external electromagnetic field from affecting the functions of circuits, components and other parts in mobile phones and other electronic products , Circuits, components and other parts in electronic products such as mobile phones need to be surrounded by shielding covers. [0003] At present, the shielding covers of electronic products such as mobile phones used in the industry are usually made of SUS304 1 / 2H steel strips...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/22
Inventor 余叙斌汤福朋赵宇姚伟东
Owner 无锡华生精密材料股份有限公司