Semi-processed non-oriented silicon steel and manufacturing method thereof

Abstract

The invention provides semi-processed non-oriented silicon steel. The silicon steel comprises following chemical components by mass: not more than 0.005% and not less than 0 of C, not more than 0.8% and not less than 0.15% of Si, not more than 0.4% and not less than 0.2% of Mn, more than 0.02% and less than 0.1% of P, more than 0% and less than 0.01% of S and not more than 0.1% and not less than 0.03% of Al, with the balance being Fe. The thickness of the silicon steel is 0.35-0.65 mm, the width is 1000-1250 mm, and the surface roughness Ra is 0.4-1.0 [mu]m. Through a plurality of tests and trials, the silicon steel fully meets quality requirements on iron loss and magnetic induction for motors. After secondary annealing and blueing, the performance can be improved by two levels. The silicon steel is favored by users at present. As the development prospect of the motor industry is wide, the silicon steel is high in popularization and application value and has a wide prospect.

Description

(1) Technical field [0001] The invention relates to a non-oriented semi-process silicon steel (50LW800) and its manufacturing method. (2) Background technology [0002] Silicon steel is an important and indispensable soft magnetic alloy for electric power, electronics and military industries, and is also the metal functional material with the largest output. It is mainly used as the iron core of various motors, generators and transformers. The motor is the driving device of various equipment such as fans, pumps, compressors, machine tools, and transmission belts. It is widely used in many industries and fields such as metallurgy, petrochemical, chemical, coal, building materials, and public facilities. In recent years, it has been supported by national policies. Under the current situation, the energy efficiency level of motors in my country has been gradually improved, but the overall energy efficiency level is still low. From the perspective of the motor itself, the averag...

AI Technical Summary

Problems solved by technology

From the perspective of the motor itself, the average efficiency of motors in my country is 3-5 percentage points lower than that of foreign countries, and the high-efficiency motors currently in use account for only about 3%; from the perspective of the motor system, due to unreasonable matching and backward adjustment methods, the motor system is running Efficiency is 10-20% lower than foreign advanced level

Extensive use of low-efficiency motors causes huge waste of electricity

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