Silicon steel core material silicon steel sheet at 6 requirements for insulation coating

Silicon steel core silicon steel sheet material for insulation coating of 6-2019 03 - 30 15:05:19 silicon steel core silicon steel sheet material for insulation coating requirements: ( 1) High resistance between the layers; ( 2) Good heat resistance and corrosion resistance, can work under high temperature and corrosive environment ( 3) Good adhesion, not easy peeling off in punching and shearing or bending; ( 4) Good processability, coating for die wear and lubrication. ( 5) Of the steel plate surface has the certain tension, reduce the magnetostrictive caused by noise; ( 6) Coating must be thin and uniform, and improve the filling performance. Currently using insulation coating has two kinds: one is a chromic acid phosphate coating, the coating liquid is a deep orange yellow transparent liquid, using temperature is 70 ~ 80 ℃, interlayer resistance is 5 ~ 50 & Omega; Cm2 / plate; The other is a resin and chromate coating, coating liquid for the part that mucus, using temperature is less than 30 ℃, interlayer resistance is the same as the former. Oriented silicon steel with isolation layer, mainly with magnesium oxide, purpose is to prevent during high temperature annealing steel plate bonding, and silica ( Si02) Produce magnesium silicate layer, and the effect of desulfurization. 5% ( The mass fraction) The titanium oxide ( TiO2) , can improve the brittleness of steel plate and the quality of magnesium silicate layer. Especially for silicon steel containing aluminium orientation, can inhibit Ti02 during high temperature annealing of steel aluminum silicon dioxide layer of destructive