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Production method for phosphorus-containing high-magnetic-induction non-oriented silicon steel

A technology of oriented silicon steel and production method, applied in the field of metallurgy, can solve the problems such as difficulty in exerting the advantages and constraints of phosphorus element, and achieve the effects of satisfying magnetic aging requirements, reducing process costs and improving operation efficiency.

Active Publication Date: 2021-12-07
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under different composition designs and process conditions, it is difficult to give full play to the advantages of phosphorus, especially the processability defects in the metallurgical process of phosphorus-containing steel, and the brittle fracture of "teeth and yoke" annealed after stamping by users, etc. In the traditional metallurgical process production, it is greatly restricted

Method used

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  • Production method for phosphorus-containing high-magnetic-induction non-oriented silicon steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for producing phosphorus-containing high magnetic induction non-oriented silicon steel. The chemical composition of the steel is: C: 0.005%, Si: 0.60%, Mn: 0.25%, P: 0.11%, S: 0.0045%, Als: 0.20 %, N: 0.0015%, Cu: 0.045%, Ti+V+Nb: 0.0050%, and the rest are iron and unavoidable impurity elements. The production method comprises the following process steps:

[0030] a) Smelting and continuous casting: use converter smelting, RH vacuum refining treatment, the composition of molten steel is controlled according to the above requirements, and cast into 230mm thick slab;

[0031] b) The soaking temperature of the hot-rolled slab is 1030°C, and it is first rolled to 40mm and then enters the finish rolling unit for rolling. The finish rolling start temperature is 980°C, the finish rolling temperature is 810°C, the coiling temperature is 660°C, and the hot-rolled plate thickness is 3.0mm;

[0032] c) cold rolling to 0.50mm after pickling;

[0033] d) After cold rolli...

Embodiment 2

[0036] A production method of phosphorus-containing high magnetic induction non-oriented silicon steel, the chemical composition of the steel is: C: 0.0052%, Si: 0.58%, Mn: 0.36%, P: 0.15%, S: 0.0040%, Als: 0.25 %, N: 0.0018%, Cu: 0.070%, Ti+V+Nb: 0.0050%, and the rest are iron and unavoidable impurity elements. The production method comprises the following process steps:

[0037] a) Smelting and continuous casting: use converter smelting, RH vacuum refining treatment, the composition of molten steel is controlled according to the above requirements, and cast into 230mm thick slab;

[0038] b) The soaking temperature of the hot-rolled slab is 1020°C, and it is first rolled to 40mm and then enters the finish rolling unit for rolling. The finish rolling start temperature is 990°C, the finish rolling temperature is 820°C, the coiling temperature is 670°C, and the hot-rolled plate thickness is 3.0mm;

[0039] c) cold rolling to 0.50mm after pickling;

[0040] d) After cold roll...

Embodiment 3

[0043] A production method of phosphorus-containing high magnetic induction non-oriented silicon steel, the chemical composition of the steel is: C: 0.006%, Si: 0.25%, Mn: 0.30%, P: 0.18%, S: 0.0040%, Als: 0.15 %, N: 0.0018%, Cu: 0.035%, Ti+V+Nb: 0.0045%, and the rest are iron and unavoidable impurity elements. The production method comprises the following process steps:

[0044] a) Smelting and continuous casting: use converter smelting, RH vacuum refining treatment, the composition of molten steel is controlled according to the above requirements, and cast into 230mm thick slab;

[0045] b) The soaking temperature of the hot-rolled slab is 1000°C, and it is first rolled to 40mm and then enters the finish rolling unit for rolling. The finish rolling start temperature is 960°C, the finish rolling temperature is 780°C, the coiling temperature is 680°C, and the hot rolled plate thickness is 3.2mm;

[0046] c) cold rolling to 0.50mm after pickling;

[0047] d) After cold rolli...

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Abstract

The invention relates to a production method for phosphorus-containing high-magnetic-induction non-oriented silicon steel. The process route comprises molten iron desulphurization, converter smelting, RH refining, continuous casting, hot rolling, acid pickling, cold rolling, continuous furnace annealing, coating, performance inspection and packaging, and the production method specifically comprises the following specific steps that (1) molten steel is smelted to target components, and then the molten steel is cast into a blank by adopting a continuous casting mode; (2) the slab temperature of a soaking section of a hot-rolled slab heating furnace is 950-1050 DEG C, the finish rolling temperature is controlled to be 780-830 DEG C, and the coiling temperature is 600-680 DEG C; (3) cold rolling is conducted after acid pickling, the overall reduction rate of cold rolling is controlled to be 80% or above till the finished product thickness is achieved, and a shear band structure is increased; and (4) the temperature of a rapid heating section of a continuous annealing furnace is set to be 1000-1150 DEG C, and nucleation of the texture structure is facilitated; and the temperature of the soaking section is set to be 750-830 DEG C, full-nitrogen dry atmosphere protection is adopted, the annealing process speed is 110-150 m / min, and the grain size is 8-4 grades. Under the condition of reducing the addition amount of silicon, aluminum and manganese alloy, the iron loss is improved, the magnetic induction performance is improved, and the mechanical performance is improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for producing phosphorus-containing high magnetic induction non-oriented silicon steel. Background technique [0002] Non-oriented silicon steel is an important metal functional soft magnetic material, which is widely used in the manufacture of electromagnet cores required for electromagnetic conversion such as motors. Nowadays, the electromagnetic performance and comprehensive quality level of related domestic products have reached the advanced level in the world, and the product competition is becoming increasingly fierce. High-efficiency, low-cost, short-process production of high-performance, competitive non-oriented electrical steel varieties has become the consensus of all mainstream manufacturers . [0003] With the advancement of modern metallurgical technology, the traditional composition design of non-oriented silicon steel varieties combined with the different proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/06C22C38/04C22C38/16C22C33/04C21D8/12C21D1/26C21D1/74
CPCC22C38/004C22C38/02C22C38/06C22C38/04C22C38/16C22C33/04C21D8/1222C21D8/1233C21D8/1244C21D1/26C21D1/74
Inventor 高振宇陈春梅李亚东刘文鹏罗理李元华王越张仁波姜福健周旭
Owner ANGANG STEEL CO LTD
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