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MIXED POWDER FOR POWDER METALLURGY AND METHOD FOR PRODUCING THE SAME, AND SINTERED BODY MADE OF IRON-BASED POWDER EXCELLENT IN CUTTABILITY AND METHOD FOR PRODUCING THE SAME
MIXED POWDER FOR POWDER METALLURGY AND METHOD FOR PRODUCING THE SAME, AND SINTERED BODY MADE OF IRON-BASED POWDER EXCELLENT IN CUTTABILITY AND METHOD FOR PRODUCING THE SAME
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机译:一种用于粉末冶金的混合粉末及其制备方法,以及具有优异可剪切性的铁基粉末烧结体及其制备方法
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摘要
PROBLEM TO BE SOLVED: To provide mixed powder with which a sintered body having both excellent machinability and drill cuttability can be obtained.;SOLUTION: The mixed powder for powder metallurgy is obtained by mixing iron-based powder, powder for an alloy, powder for improving cuttability and lubricant powder. The powder for improving cuttability includes powder capable of forming an SiO2-MgO amorphous phase or an SiO2-MgO-alkali metal oxide amorphous phase and an oxide phase including SiO2 or magnesium oxide (MgO). Examples of the powder for improving cuttability includes enstatite powder, talcum powder, kaolin powder, mica powder, water-granulated slag powder, magnesium oxide (MgO) powder, and mixed powder of SiO2 and MgO. Further, the powder for improving cuttability may be blended with metal boride powder and metal nitride powder serving as hard metal compound particles and MnS and CaF2 serving as soft metal compound particles. The sintered body produced from the mixed powder has a base phase in which a soft metal compound phase having a hardness lower than the average hardness of the base phase and a hard metal compound phase having a hardness higher than the average hardness of the base phase are dispersed, thus having excellent cuttability including both excellent lathe cuttability and cuttability.;COPYRIGHT: (C)2012,JPO&INPIT
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