A hot -rolled narrow -rolled steel and its preparation methods and applications for a household motor transferred

A technology for household motors and narrow strip steel, which is applied in the field of special steel, and can solve problems such as rough production process, stamping cracks, and no hot-rolled narrow strip steel

Active Publication Date: 2020-10-23
QIANAN CITY JIUJIANG WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the carbon structure hot-rolled narrow strip steel is mainly used in the production of various welded steel pipes. Due to the low requirements for raw materials in the pipe industry, the production processes of various steel companies are relatively rough, and there is no special production for household motor stators. The hot-rolled narrow strip steel has caused downstream users to generally have defects such as stamping cracks and surface pitting in the process of making household motor rotor stators

Method used

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  • A hot -rolled narrow -rolled steel and its preparation methods and applications for a household motor transferred
  • A hot -rolled narrow -rolled steel and its preparation methods and applications for a household motor transferred
  • A hot -rolled narrow -rolled steel and its preparation methods and applications for a household motor transferred

Examples

Experimental program
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Effect test

preparation example Construction

[0030] The present invention also provides a method for preparing the hot-rolled narrow-strip steel described in the above-mentioned technical solution, comprising the following steps: sequentially heating, rolling and coiling the slab corresponding to the chemical composition of the hot-rolled narrow-strip steel described in the above-mentioned technical solution;

[0031] The rolling includes the first dephosphorization, rough rolling, second dephosphorization and finish rolling carried out in sequence;

[0032] The starting temperature of the rough rolling is 1240-1260°C;

[0033] The coiling temperature is 570-610°C.

[0034] The invention heats the cast slab to obtain the heated cast slab. In the present invention, the cast slab has the same chemical composition as that of the hot-rolled narrow-strip steel described in the above technical solution, and will not be repeated here. In the present invention, the casting slab is preferably a rectangular slab, and the section...

Embodiment 1

[0046] The raw materials were smelted and continuously cast into a rectangular billet with a cross-sectional size of 165*280 mm, and its chemical composition is shown in Table 1.

[0047] The preparation process parameters are shown in Table 2, specifically: soaking section holding temperature 1295°C, soaking section holding time 125min, first dephosphorization and second descaling pressures 17.12MPa, 17.23MPa, rough rolling start temperature 1247 ℃, the finishing temperature of rough rolling is 1220℃, the thickness of intermediate billet is 30.8mm, the starting temperature of finishing rolling is 1189℃, the finishing temperature of finishing rolling is 905℃, and the coiling temperature is 585℃.

Embodiment 2～3

[0049] The specification and composition of the slabs used in Examples 2-3 are shown in Table 1, and the preparation method is the same as that of Example 1, the only difference lies in the setting of parameters, and the specific process parameters are shown in Table 2.

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Abstract

The invention provides a hot rolling narrow strip for a household motor rotor and stator and a preparing method and application thereof, and belongs to the technical field of dedicated steel. The hotrolling narrow strip comprises, by mass percent, 0.04 to 0.07% of C, 0.08 to 0.15% of Si, 0.30 to 0.40% of Mn, not larger than 0.030% of P, not larger than 0.030% of S, not larger than 0.10% of Cr, not larger than 0.10% of Ni, not larger than 0.10% of Cu, not larger than 0.0080% of As and the balance iron and inevitable impurities. Through cooperation effect of elements and content of the hot rolling narrow strip, the hardness of the steel can be obviously reduced, and steel plasticity is improved. The invention further provides a preparing method of the hot rolling narrow strip for the household motor rotor and stator. A casting blank is sequentially subjected to heating, rolling and reeling. Rolling comprises primary dephosphorization, rough rolling, secondary dephosphorization and finish rolling in sequence.

Description

technical field [0001] The invention relates to the technical field of special steel, in particular to a hot-rolled narrow-strip steel used for a rotor stator of a household motor and a preparation method and application thereof. Background technique [0002] Household motors, that is, motors used in civilian household appliances. The rotor stator is the collective name of the rotor and the stator, and is an important part of the motor. It is widely used in fan motors, air conditioner motors, washing machine motors, etc. With the rapid development of the motor industry, and under the influence of a series of policies such as home appliances going to the countryside, old-for-new ones, and export tax rebates, the motor market continues to grow, and the usage continues to increase. [0003] At present, the rotor and stator of household motors are widely made of carbon structural steel. Most of the carbon structure hot-rolled narrow strip steel is mainly used in the production...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C21D8/02C22C38/02C22C38/04C22C38/42
CPCC21D8/0226C21D2211/001C22C38/002C22C38/02C22C38/04C22C38/42
Inventor马啸晨梁鹏冯润壮
OwnerQIANAN CITY JIUJIANG WIRE