High-hardness steel belt for home appliances and manufacturing method

A manufacturing method and high-hardness technology, applied in manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of poor surface treatment, insufficient hardness of ordinary cold-rolled steel strips, and inability to meet the quality requirements for producing steel for household appliances, etc. A promising, promising effect

Inactive Publication Date: 2013-07-17
浙江龙盛薄板有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ordinary cold-rolled steel strip cannot meet the quality requirements for the production of steel for household appliances due to defects such as insufficient hardness and poor surface treatment

Method used

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  • High-hardness steel belt for home appliances and manufacturing method
  • High-hardness steel belt for home appliances and manufacturing method
  • High-hardness steel belt for home appliances and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Hot rolling:

[0054] The composition of hot-rolled raw materials is shown in the table below:

[0055] serial number

C

Si

mn

P

S

Al

1

0.07

0.12

0.28

0.018

0.015

0.015

2

0.1

0.09

0.25

0.019

0.014

0.02

3

0.07

0.13

0.27

0.016

0.015

0.023

[0056] The balance is Fe and trace unavoidable impurities;

[0057] The finishing temperature of hot rolling is 870±20℃, and the coiling temperature of finishing rolling is 650±20℃;

[0058] (2) pickling

[0059] The hot-rolled steel coil is pickled by a push-pull shallow tank turbulent pickling unit, and pickled with hydrochloric acid. The concentration of hydrochloric acid is controlled between 7% and 17% (w / w) to remove the surface oxide scale.

[0060] (3) cold rolling

[0061] After pickling, the steel coil is rolled by a double-stand reversible rolling mill;

[0062] (4) Degreasing of the ve...

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Abstract

The invention provides a high-hardness steel belt for home appliances. The chemical component of the high-hardness steel belt includes, by mass, 0.06%<=C<=0.13%, 0.03%<=Si<=0.25%, 0.2%<=Mn<=0.4%, 0%<P<0.025%, 0%<S<0.025%, 0.01%<=Al<=0.05%, and the balance of Fe. After many tests and tries, the high-hardness steel belt completely meets quality requirements for strength, hardness and elongation of high-hardness steel for side plates of refrigerators, is quite popular with customers, and has high popularization and application values and wide prospect since cold-rolled steel belts for home appliances are quite wide in development prospect.

Description

(1) Technical field [0001] The invention relates to a high-hardness (LJD) steel strip for household appliances and a manufacturing method thereof. (2) Background technology [0002] The home appliance industry is an emerging industry formed after the reform and opening up. With the implementation of the policy of sending home appliances to the countryside in the past few years, the domestic market, especially the rural market, has a strong demand. It is also very different from the surface requirements. For example, the side panels and back panels of refrigerators require high hardness and corresponding surface treatment. In addition, because the steel used for household appliances is directly used as the appearance of the final product, the quality requirements for the panel surface are also high. There must be no defects visible to the naked eye. [0003] According to a large amount of research data on customers, the demand for steel strips for high-hardness steel for ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C21D8/02C21D9/67C25F1/02
Inventor 潘小成黄爱军祝海容刘海潮
Owner 浙江龙盛薄板有限公司
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