High-yield-strength non-oriented electrical steel plate and manufacturing method thereof

A technology of grain-oriented electrical steel sheet and manufacturing method, which is applied to manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of increasing manufacturing cost, unstable improvement effect, cold brittle strip steel, etc., and achieves excellent yield strength. Effect
CN102758150AInactive Publication Date: 2012-10-31BAOSHAN IRON & STEEL CO LTD
4 Cites 14 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2012-10-31
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Disclosed are a high-yield-strength non-oriented electrical steel plate and a manufacturing method thereof. The manufacturing method includes that firstly, slabs are produced by preprocessing, smelting, vacuum refining and continuous casting of molten iron, and during the finish refining, molten steel is subjected to calcium treatment with CaSi cored wires, 0.5-2.0kg / t of steel is added, killing time of continuous cast molten steel is within 30 minutes, and the ratio of calcium to sulphur in the steel ranges from 1.5 to 2.8 after the calcium treatment; secondly, hot rolling, normalizing, acid pickling and cold rolling processes are performed, wherein rolling with 1-5 passes is performed in a rough rolling section of the hot rolling process, and the initial temperature of slabs is equal to or higher than 1000 DEG C while the rolling speed is equal to or higher than 9m / s in a finish rolling section of the hot rolling process; and thirdly, annealing and insulating coating processes are performed so that finished non-oriented electrical steel plates are obtained, wherein the temperature of a soaking section is controlled to be 800 DEG C-950 DEG C during continuous annealing, and the size of crystal grains of the electrical steel plates ranges from 20 micrometers to 90 micrometers. The quantity of alloy added in the steelmaking process can be reduced obviously so that expenses for alloy are saved greatly. The manufacturing method of the high-yield-strength non-oriented electrical steel plate has the advantages of convenience in operation, simplicity and convenience in control, low cost, control accuracy and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a non-oriented electrical steel plate and a manufacturing method thereof, in particular to a non-oriented electrical steel plate with high yield strength and a manufacturing method thereof. Specifically include: liquid steel calcium treatment and non-metallic inclusion control technology in the RH refining process, slab heating and hot rolling rough rolling, finishing rolling process control technology, continuous annealing of finished strip steel and product grain control technology . Background technique

[0002] In recent years, as people pay more and more attention to energy saving and environmental protection, all kinds of motors, compressors, generators, etc. are gradually developing in the direction of small size, precision and high efficiency. Correspondingly, non-oriented electrical steel sheets as raw materials are required to have good mechanical properties, especially high yield strength, while maintaining high mag...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More