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Powder warm-rolling manufacturing method of thin high-silicon steel strip

A manufacturing method and high-silicon steel technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as complex process, failure to meet environmental protection requirements, and harsh working environment

Active Publication Date: 2018-06-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology has been used to achieve small-scale industrial production, its scale and output are far from meeting the needs of the international soft magnetic material market, and this preparation method is very complicated in process, high in energy consumption and cost, and the working environment is not good. It is harsh and cannot meet environmental protection requirements

Method used

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  • Powder warm-rolling manufacturing method of thin high-silicon steel strip
  • Powder warm-rolling manufacturing method of thin high-silicon steel strip
  • Powder warm-rolling manufacturing method of thin high-silicon steel strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Mix -100 mesh reduced Fe powder with Fe-80% Si high-purity powder with a particle size of ≤10 μm at a ratio of 91.625:8.375. Form Fe-6.7Si alloy. When mixing, add a total amount of 0.4% composite lubricant, and 0.1% glycerin to reduce the oxidation of the powder heating process, using absolute ethanol as a solvent, adding according to the amount of 500ml / ton. The composite lubricant is composed of zinc stearate and EBS, and the ratio of zinc stearate:EBS is 2:8. The above powders were mixed for 4 h using a V-shaped blender.

[0050] The mixed powder is heated to 150°C with a powder heating device, and the roll is preheated to the same temperature. Using a two-roller horizontal rolling mill and an inclined feeding trough, using the powder's own weight and the friction between the roll and the powder to feed, a 2.4mm powder warm-rolled slab is rolled out, and the width of the slab is 100mm. The density of the compact is 6.05g / cm 3 .

[0051] The powder compact is pla...

Embodiment 2

[0055] Mix -100 mesh reduced Fe powder with Fe-70% Si high-purity powder with particle size ≤10 μm according to the ratio of 93.57:6.42 to form Fe-4.5Si alloy. When mixing, add a total amount of 0.6% composite lubricant, and 0.1% glycerin to reduce the oxidation of the powder heating process, using absolute ethanol as a solvent, adding according to the amount of 500ml / ton. The composite lubricant is composed of zinc stearate and EBS, and the ratio of zinc stearate:EBS is 2:8. The above powders were mixed for 6 h using a drum mixer.

[0056] The mixed powder is heated to 125°C with a powder heating device, and the roll is preheated to the same temperature. Using a two-roller horizontal rolling mill and an inclined feeding trough, using the powder's own weight and the friction between the roll and the powder to feed, a 1.0mm powder warm-rolled slab is rolled out, and the width of the slab is 200mm. The density of the compact is 6.55g / cm 3 .

[0057] The powder compact is pla...

Embodiment 3

[0062] Mix -100 mesh reduced Fe powder with Fe-76% Si high-purity powder with a particle size of ≤10 μm at a ratio of 91.45:8.55 to form Fe-6.5% Si mixed powder. When mixing, add a total amount of 0.6% composite lubricant, and 0.1% glycerin to reduce the oxidation of the powder heating process, using absolute ethanol as a solvent, adding according to the amount of 500ml / ton. The composite lubricant is composed of zinc stearate and EBS, and the ratio of zinc stearate:EBS is 3:7. The above powders were mixed for 6 h using a drum mixer.

[0063] The mixed powder is heated to 140°C with a powder heating device, and the roll is preheated to the same temperature. Using a two-roller horizontal rolling mill and an inclined feeding trough, using the powder's own weight and the friction between the roll and the powder to feed, a 1.6mm powder warm-rolled slab is rolled out, and the width of the slab is 120mm. The density of the compact is 6.1g / cm 3 .

[0064] The powder slab is place...

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Abstract

The invention provides a power warm-rolling manufacturing method of a thin high-silicon steel strip. According to the method, reduced Fe powder and high-purity silicon Fe powder with the Si content being 70-80% are adopted to form mixed powder containing Fe and 4.5-6.7% of Si; high-purity silicon Fe powder adheres to the surface of the reduced Fe powder or is filled into holes of the Fe powder through a compound forming agent; powder warm-rolling forming is conducted at 125-150 DEG C to prepare a blank; the powder warm-rolled plate blank is subjected to sintering at 1070-1170 DEG C under vacuum or reducing atmosphere shielding to enable Fe and Si to be partially alloyed to form a porous and compressible incompletely-alloyed high-silicon steel blank; and then, the porous and compressible incompletely-alloyed high-silicon steel blank is subjected to repeated cold rolling and sintering and finally is subjected to sintering at 1260-1340 DEG C under vacuum or reducing atmosphere shielding to achieve homogeneous alloying of high-silicon steel, and the high-silicon steel strip which contains 4.5-6.7% of Si and has the thickness of 0.1-0.5 mm and the density of 7.32-7.42 g / cm3 is obtained.

Description

technical field [0001] The invention belongs to the field of preparation and processing of metal materials, and in particular relates to a method for powder metallurgy sintering and rolling deformation of high-performance high-silicon steel soft tape materials. technical background [0002] The remanence and coercivity of soft magnetic materials are very small, that is, the hysteresis loop is very narrow, which almost coincides with the basic magnetization curve, and is mainly used in the cores of inductance coils, transformers, relays and motors. The maximum magnetic permeability of Fe-Si alloy changes with Si content, and two peaks of maximum magnetic permeability appear around 2% and 6.5% of Si mass percentage (the same below), reaching 10000 and 25000 respectively. The maximum magnetic permeability of Fe-Si alloy has no absolute advantage in soft magnetic materials. For example, the maximum magnetic permeability of permalloy can reach 200,000. However, the production co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/18C22C38/02
CPCC22C38/02B22F3/18B22F2998/10B22F1/0003B22F1/10B22F3/1007B22F3/1021B22F2003/185
Inventor 罗丰华杨昊曾旭琴廖相巍李益民
Owner CENT SOUTH UNIV