Method for producing high-magnetic-induction non-oriented silicon steel 50BW800G through normalizing-free heat treatment

A 50BW800G, grain-oriented silicon steel technology, applied in the field of material processing, can solve the problems of improving the electromagnetic properties, unable to normalize the annealing of hot-rolled raw material coils, etc., and achieve the effect of increasing added value, good electromagnetic properties, and satisfactory electromagnetic properties

Inactive Publication Date: 2020-06-16
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For some production enterprises without normalized annealing equipment, it is impossible to improve the electromagnetic properties through normalized annealing of hot-rolled raw material coils, and produce high magnetic induction non-oriented silicon steel

Method used

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  • Method for producing high-magnetic-induction non-oriented silicon steel 50BW800G through normalizing-free heat treatment
  • Method for producing high-magnetic-induction non-oriented silicon steel 50BW800G through normalizing-free heat treatment
  • Method for producing high-magnetic-induction non-oriented silicon steel 50BW800G through normalizing-free heat treatment

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Effect test

Embodiment 1

[0030] The invention provides a method for producing high magnetic induction non-oriented silicon steel 50BW800G by anomalous heat treatment, comprising the following steps:

[0031] Step 1) Steel composition design:

[0032] The composition of the steel used is shown in the following table according to weight percentage:

[0033]

[0034] Compared with ordinary 50BW800 products, the alloying element Sb is added, and the rest of the ingredients are the same.

[0035] Step 2) hot rolling production:

[0036] The molten steel is made into a slab with a thickness of 70-85mm through the FTSR continuous casting machine. The slab adopts a low-temperature heating process, and the heating temperature is ≤1100°C; it can reduce the solid solution of inclusions such as MnS and AlN in the steel; after 7 racks of heating A hot-rolled steel plate with a thickness of 2.55mm was rolled. The final rolling temperature was controlled at 900°C and the coiling temperature was controlled at 72...

Embodiment 2

[0040] The invention provides a method for producing high magnetic induction non-oriented silicon steel 50BW800G by anomalous heat treatment, comprising the following steps:

[0041] Step 1) Optimizing steel composition:

[0042] The composition of the steel used is shown in the following table according to weight percentage:

[0043]

[0044] Compared with ordinary 50BW800 products, the alloying element Sb is added, and the rest of the ingredients are the same.

[0045] Step 2) hot rolling production:

[0046] The molten steel is made into a slab with a thickness of 70-85mm through the FTSR continuous casting machine. The slab adopts a low-temperature heating process, and the heating temperature is ≤1100°C; it can reduce the solid solution of inclusions such as MnS and AlN in the steel; after 7 racks of heating A hot-rolled steel plate with a thickness of 2.55mm was rolled. The final rolling temperature was controlled at 890°C, and the coiling temperature was controlled ...

Embodiment 3

[0050] The invention provides a method for producing high magnetic induction non-oriented silicon steel 50BW800 by non-normalized heat treatment, comprising the following steps:

[0051] Step 1) Steel composition design:

[0052] The composition of the steel used is shown in the following table according to weight percentage:

[0053]

[0054] The rest is Fe and unavoidable impurities. Compared with ordinary 50BW800 products, the alloying element Sb is added, and the rest of the ingredients are the same.

[0055] Step 2) hot rolling production:

[0056] The molten steel is made into a slab with a thickness of 70-85mm through the FTSR continuous casting machine. The slab adopts a low-temperature heating process, and the heating temperature is ≤1100°C; it can reduce the solid solution of inclusions such as MnS and AlN in the steel; after 7 racks of heating A hot-rolled steel plate with a thickness of 2.55mm was rolled, the final rolling temperature was controlled at 910°C,...

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Abstract

The invention belongs to the technical field of material processing, and particularly provides a production process for producing high-magnetic-induction non-oriented silicon steel 50BW800G through normalizing-free heat treatment. At present, the production of Benxi steel non-oriented silicon steel 50BW800 is supplied by an FTSR production line, no normalizing annealing equipment exists in the cold rolling process, a production process for producing the high-magnetic-induction non-oriented silicon steel under the condition that a hot rolled coil is free of normalizing annealing needs to be found, and existing equipment is fully utilized for producing high-added-value products. According to the production process, through optimal design of alloy components and hot rolling and cold rolling continuous annealing processes and by utilizing the advantage that an existing FTSR short-process production line is beneficial to adopting a low-temperature heating process, a hot-rolled coil can be directly cold-rolled to the thickness of a finished product without normalizing heat treatment of the hot-rolled coil, and then final continuous annealing is carried out to produce the high-magnetic-induction non-oriented silicon steel 50BW800G, the electromagnetic performance of the product meets the requirement, the production cost is low, the electromagnetic performance is good, and the additional value of the product is increased.

Description

technical field [0001] The invention belongs to the technical field of material processing, and specifically provides a method for producing high magnetic induction non-oriented silicon steel 50BW800G by anomalous heat treatment. Background technique [0002] The production of high magnetic induction non-oriented silicon steel usually adopts the normalization annealing process of hot-rolled raw materials. After the hot-rolled coils undergo normalization annealing, the texture {100}<011> density in the cold-rolled sheet structure that is beneficial to the electromagnetic properties will increase. Improve the electromagnetic properties of the steel plate. High magnetic induction non-oriented silicon steel 50BW800G has high requirements on electromagnetic properties, requiring iron loss ≤ 4.5W / kg, magnetic induction ≥ 1.74T, (ordinary 50BW800 requires iron loss ≤ 5.0W / kg, magnetic induction ≥ 1.70T). For some production enterprises without normalizing annealing equipment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12C22C38/02C22C38/04C22C38/06C22C38/60
CPCC21D8/1222C21D8/1261C22C38/001C22C38/02C22C38/04C22C38/06C22C38/60
Inventor 李毅伟王溪刚李德君王鲁宁乔浩浩
Owner BENGANG STEEL PLATES
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