Successive Boronizing and Austempering for GGG-40 Grade Ductile Iron  

作　　者：Murat Baydogan Seckin Izzet Akray 

机构地区：[1]Department of Metallurgy and Materials Engineering,Istanbul Technical University

出　　处：《Journal of Iron and Steel Research International》2009年第2期50-54,共5页

摘　　要：Boronizing and austempering were successively applied to a GGG-40 grade ductile iron in order to combine the advantages of both process in a single treatment. This new procedure formed a 30 μm thick boride layer on the surface with subsurface matrix structure consisted of acicular ferrite and retained austenite. Reciprocating wear tests showed that successive boronizing and austempering exhibited considerably higher wear resistance than conventional boronizing having a subsurface matrix structure consisting of ferrite and pearlite.Boronizing and austempering were successively applied to a GGG-40 grade ductile iron in order to combine the advantages of both process in a single treatment. This new procedure formed a 30 μm thick boride layer on the surface with subsurface matrix structure consisted of acicular ferrite and retained austenite. Reciprocating wear tests showed that successive boronizing and austempering exhibited considerably higher wear resistance than conventional boronizing having a subsurface matrix structure consisting of ferrite and pearlite.

关 键 词：austempered ductile iron BORONIZING heat treatment wear 

分 类 号：TG156[金属学及工艺—热处理]