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    • 5. 发明申请
    • METHOD OF MAGNETICALLY PROCESSING AN IRON-CARBON ALLOY
    • 磁性合金的磁性加工方法
    • US20130014863A1
    • 2013-01-17
    • US13183610
    • 2011-07-15
    • Gerard M. LudtkaGail M. LudtkaJohn B. WilgenRoger A. Kisner
    • Gerard M. LudtkaGail M. LudtkaJohn B. WilgenRoger A. Kisner
    • C21D1/34C21D1/00C21D6/00
    • C21D1/19C21D1/04C21D1/22C21D1/34C21D2211/003C21D2211/005
    • A magnetic field assisted processing method entails heating an iron-carbon alloy at an austenitizing temperature for a time duration sufficient for the alloy to achieve an austenitic microstructure; cooling the iron-carbon alloy to an intermediate temperature defined by a continuous cooling transformation (CCT) diagram for the iron-carbon alloy at a rate sufficient to avoid phase transformation of the austenitic microstructure, the intermediate temperature being below a bainitic knee of the CCT diagram and above a martensite start temperature; and applying a high field strength magnetic field of at least about 0.2 Tesla to the iron-carbon alloy after reaching the intermediate temperature. The field is applied for a time duration sufficient to transform the austenitic microstructure into a fine dispersion of one or more iron carbide phases in a ferrite matrix in order to produce a magnetically-processed alloy having improved ductility and strength.
    • 磁场辅助处理方法需要在奥氏体化温度下加热铁 - 碳合金足够长的时间以使合金达到奥氏体组织; 将铁 - 碳合金冷却到铁 - 碳合金的连续冷却转变(CCT)图定义的中间温度,其速度足以避免奥氏体组织的相变,中间温度低于CCT的贝氏体膝盖 图和以上马氏体开始温度; 并且在达到中间温度之后将至少约0.2特斯拉的高场强磁场施加到铁 - 碳合金。 施加足够的时间以将奥氏体组织变形为铁素体基体中一个或多个碳化铁相的细分散体,以便制备具有改善的延展性和强度的磁加工合金。