FIELD: powder metallurgy, namely manufacture of metal powder articles with high strength of core and hard compacted surface, possibly used in machine engineering for making gear wheels, bearing assemblies and so on.
SUBSTANCE: method for compacting surface layer of carbon-containing article formed of iron base powder comprises steps of decarbonizing surface layer of article for softening it; mechanically compacting prepared soft surface layer. Sintered powder article made of iron base alloy according to invention contains 0.3 -1.0 mass % of carbon in its core and 0.3 -1.5 mass %, preferably 0.5 -0.9 mass % of carbon in surface hardened layer.
EFFECT: possibility for making article whose core has high rupture strength and yield limit and whose surface has high hardness and improved fatigue properties.
11 cl, 4 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PRE-ALLOYED IRON-BASED POWDER, IRON-BASED POWDER MIXTURE CONTAINING PRE-ALLOYED IRON-BASED POWDER, AND METHOD OF MAKING PRESSED AND SINTERED PARTS FROM IRON-BASED POWDER MIXTURE | 2015 |
|
RU2699882C2 |
| SINTERED METALLIC DETAILS AND METHOD OF ITS MANUFACTURING | 2005 |
|
RU2345867C2 |
| SINTERED METALLIC DETAILS AND METHODS OF ITS MANUFACTURING | 2005 |
|
RU2343042C2 |
| NITRIDE-HARDENED SINTERED STEELS | 2011 |
|
RU2559603C2 |
| METHOD FOR MAKING SINTERED METALLIC ARTICLES WITH COMPACTED SURFACE | 2004 |
|
RU2311263C1 |
| LOW-ALLOY STEEL POWDER | 2008 |
|
RU2490353C2 |
| FERRUM-VANADIUM POWDERY ALLOY | 2010 |
|
RU2532221C2 |
| IRON-BASED POWDER | 2017 |
|
RU2734850C2 |
| IRON-BASED POWDER FOR INJECTION MOULDING OF POWDER | 2011 |
|
RU2593064C2 |
| LOW-ALLOYED STEEL POWDER | 2008 |
|
RU2482208C2 |
