Silicon steel is divided into several kinds
A coatingA coating is semi organic thin coating, which has excellent punching, corrosion resistance, freon resistance and high inter resistance, especially welding performance, suitable for medium and small motors and household appliancesMotor and small transformer core EI, T4 coating.H coating H coating A1 coating and steel equivalent to Sichuan iron for the semi organic thick coating, has excellent workability, corrosion resistance, and high resistance of freon, suitable for small and medium sized motor. T4 coating A1 coating and steel equivalent of Sichuan iron.
Stress annealing. Equivalent to the C-4 coating of AISI and the T3 coating of WISCOUnless otherwise specified, the design of steel surface insulation coating for A coating. The energy loss caused by the transformer core is called iron loss, iron loss consists of two parts, hysteresis loss and eddy current loss. The hysteresis loss is due to the iron core in repeated magnetization process, "internal friction loss" caused by it, and the iron core
With the increase of environmental awareness, people have been aware of chromate with serious consequences for the environment and public health in the developed countries, so some of the frequent application of chromate field has formulated the corresponding environmental protection laws and regulations, such as metal passivation liquid Japan environmental protection standards: manufacturing process and products of Cr (VI) 0.05mg/L. content is lower than Europe has formulation of waste electrical and electronic equipment related to the EU directive, given the restrictions on the products containing materials, also provides for the prohibition of use of substances (Pb, Cr (VI), Cd, Hg), has attracted the attention of the people. In this context, whether domestic or abroad are actively on the substitution of chromate coating.
The trend is gradually out of organic coatings, inorganic coatings gradually replace semi inorganic coatings. But influenced by the inorganic coating itself and all aspects of the conditions, the electrical steel manufacturer is still widely used semi inorganic coatings. The main products are L, L2, L3, A, N of Nippon Steel coating, J coating, JFE. T4, A, T5 coating H coating of WISCO, Baosteel, TISCO G2, X4, H5, C6A in Pohang, South Korea and Russia's new Lipetsk C6B coating TW1 coating. These semi inorganic coatings, except TISCO X4 and H5, coating, mostly containing chromate salt in coating solution, coating production and processing, and the use of coated steel sheet coating liquid waste treatment process, will cause some damage to the health of the operator and the environment, especially the six chromium is considered to have high toxicity and carcinogenic.
