Auto Transformer EI 57 CRNGO Steel

One phase EI lamination EI 57 without hole ,un-annealing

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In 1900, British Hadfield (R.A. Hadfield) and others first discovered that Si-Fe alloy containing Si4% has good magnetic properties. In 1903, Germany and the United States successively produced hot rolled silicon steel sheets containing 1.0% to 4.5% Si. In 1906, it replaced low carbon steel and was used to manufacture motor and transformer cores. In 1934, the US Goss (N.P. Goss) used two cold rolling methods to make (110) [001] grain oriented cold-rolled silicon steel sheets containing Si3%. In 1968, Japan ’s Taguchi et al. Used a comprehensive inhibitor of manganese sulfide and aluminum nitride and used a large reduction cold rolling method to produce (110) [001] highly magnetically oriented silicon steel. The grain orientation of this material is more accurate , Iron loss and magnetic properties are further improved. Over the years, the schematic curve of the decrease in the iron loss value of silicon steel is shown in Figure 1.

In 1949, the United States made cold-rolled (110) [001] oriented thin silicon steel strip with a thickness of less than 0.1 mm for the electronics industry. In 1957, Federal Republic of Germany made (100) [001] cubically oriented silicon steel sheets, which have a high magnetic aspect ratio, but due to the complicated process, they have not been officially produced yet. The following figure is a schematic diagram of grain arrangement in (110) [001] and (100) [001] oriented silicon steel sheets. The magnetostriction of Si-Fe alloy containing 6.5% of silicon is about zero, the magnetic permeability is high, the iron loss is low, the transformer made is noiseless, but it is not widely used because of the difficulty in processing. In the 1970s, liquid rapid cooling technology was used to make 6.5Si-Fe microcrystalline thin strips, and new varieties of thinner oriented silicon steel sheets and (100) surface texture (non-crystalline orientation) silicon steel sheets were developed.

China began producing hot-rolled low-silicon silicon steel sheets (Si1 ~ 2%) in 1953; started producing hot-rolled high-silicon silicon steel sheets (Si3.0 ~ 4.5%) in 1955; and started producing cold-rolled oriented thin silicon steel strips in 1962. In the 1970s, production of cold-rolled oriented silicon steel strip began.

Jiangyin hengtong was found in 1989.it is a large scale , standardization, consideration, and information all constitute important factors in the development of steel managing enterprises. The company located in jiangyin city-the NO.1 of the TOP 100 cities in China ,faces the shanghai on the east and near the changjiang river on the north ,with the ascendant geographical location and convenient transportation makes goods reach to destination very quickly.

Now we have two companies, jiangyin hengtong ,jiangsu smart motor technology（jiangsu shuaijin） ,about 200 employees ,30% of them is professional and technical talents.jiangyin hengtong is as a window of the group . it got the ISO9001 ROHS SGS ISO14001 IATF16949 and the horner of jiangyin high-tech enterprise,jiangyin key enterprise . it covers about 1300 are and has two set of slitting machine , twelve sets of annealing equipment .more than 50 sets of punching machine and cutting machine. We can produce most of kinds EI type ,UI type and other silicon steel sheet in the market ,Contain the thickness 0.23mm 0.30mm 0.35mm 0.5mm etc .annual quantity is about 50000 ton.

In the past 20 years, jiangyin hengtong made a great achievement in the filed of transformer industry , Power tools industry, household appliances industry, welding industry, automobile manufacturing industry .well-known and trust by the domestic and foreign enterprises ,such as microtek ,luminous , leader,EAGTOP,GREE etc. The products has been sold to US, Brazil ,India ,EGYPT,RUSSIA AND POLAND. Jiangyin hengtong has been the most important punching company in the word .