A kind of non-oriented silicon steel for high power factor motor and its production method

Abstract

Non-oriented silicon steel for a high-power-factor motor is prepared from, by weight, 0-0.0020% of C, 1.70-1.90% of Si, 0.10-0.20% of Mn, 0-0.05% of P, 0-0.0030% of S, 0.25-0.35% of Al, 0.05-0.50% of Cr and 0-0.0020% of N. A production method includes the steps that pure steel is smelted into ingots; the ingots are heated; hot rolling is conducted; coiling is conducted; normalizing is carried out; acid pickling is conducted; cold rolling is conducted; finished products are annealed at the N2+H2 atmosphere; cooling, coating and finishing are conducted through conventional methods. The thickness of the silicon steel is 0.50 mm, iron loss P1.5 / 50 is smaller than or equal to 3.3 W / kg, and B5000 is larger than or equal to 1.74 T. A motor simulation result shows that the silicon steel can be used for manufacturing the high-power-factor motor, relatively high motor efficiency is obtained, and components are simple.

Description

technical field

[0001] The invention relates to a non-oriented silicon steel and a production method thereof, in particular to a non-oriented silicon steel for high power factor motors and a production method thereof. Background technique

[0002] In recent years, environmental issues such as global warming and air pollution and energy shortages have attracted worldwide attention. In order to curb the continuous warming of the earth, it is necessary to improve energy efficiency and reduce emissions in terms of CO 2 major greenhouse gases. In my country, motors consume about 60-70% of the total domestic electricity, especially industrial motors consume more than 70% of electricity. Relevant reports show that the current market share of high-efficiency motors in my country only accounts for about 10% of the entire motor market. For this reason, improving the performance and efficiency of motors is a long-term and arduous task, which requires the non-oriented electrical stee...

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