Casting processing in the steel knot produced by VCD, when the silicon content is less than 0. IDPd, the steel segregation, especially the steel party segregation lacking one road and one steel, is significantly improved, the preference of sulfur and antimony It depends on the silicon well and the steel key stalk D. When the VCDt is selected for the low-silicon content of molten steel, the process performance of the forgings is improved. The value of the steel rotor shaft is added, and the FATT constant drops from -60 °C to about -100 °C.
It should be said that vacuum decarburization is used to obtain steel with a low magnetic content, such as a carbon content lower than that. -01% of the magnetic steel is one of the widely used RHtt. From the point of view of metallurgy, vacuum brittle carbon and VCD stand almost in the ratio of carbon/oxygen deficiency. In addition to Ding, the carbon content can be reduced to 4001%, and the remaining element content can be manipulated very low. Because in the production of the outline key for large magnetic parts, there is an intention to use the aluminum-added E-fr method to manipulate the oxygen content, and to prevent gas from being re-oxidized during the blockage, gas maintenance is performed in the future. When the ultrasound was probed, the forgings were found to have a high degree of purity. When comparing the hydrogen content of a steel bond, it is necessary to consider the influence of the sampling type and the analytical method.
It is necessary to emphasize that in Hattingen, only when the hydrogen content after RH treatment is 1, but below Pm, the alloy steel forgings are not: in the sulphur ft doping which is to disperse the iS fire, especially the deformation The anisotropy of the forgings, that is, the experimental values in the longitudinal and transverse directions with respect to the main deformation direction, is largely unrelated. The TN method developed in Tissing is to spray hydrogen gas together with csl or CaG, so that the sulfur content is reduced to the lowest possible level and constitutes a microscopic doping that is not deformed.