METHOD FOR UNDER-PRESSURE CARBURIZING OF STEEL WORKPIECES
摘要
The subject of this invention relates to method carburizing of steel products, mainly parts of machines, vehicles and every mechanical apparatus, in vacuum furnaces under reduced pressure and elevated temperature. The method of under-pressure carburizing of steel workpieces according to present invention relates to introduction of active nitrogen carrier during heating up of the load. Introduction of the active nitrogen carrier is terminated when the load reaches temperature required to start carburizing process; from this temperature the carbon carrier is added. Pressure in the furnace chamber during continuous or pulse introduction of the active nitrogen carrier should be maintained within the range from 1 to 500 mbar.
申请公布号
WO2004040033(A1)
申请公布日期
2004.05.13
申请号
WO2003PL00065
申请日期
2003.07.02
申请人
SECO/WARWICK SP. Z O.O.;POLITECHNIKA LOKZKA;KULA, PIOTR;OLEJNIK, JOZEF;HEILMAN, PAUL