A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts
Highly performance methods for cold pressing (cold die forging) of preforms from iron powder with subsequent heat treatment and producing ready parts made of powder are described in the paper. These methods allow fabricating parts with smooth surfaces and improved mechanical characteristics̵...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-09-01
|
| Series: | Technologies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2227-7080/7/4/70 |
| id |
doaj-ae8df1d29cf044f6bf2040d13fb74a1a |
|---|---|
| record_format |
Article |
| spelling |
doaj-ae8df1d29cf044f6bf2040d13fb74a1a2020-11-25T02:15:01ZengMDPI AGTechnologies2227-70802019-09-01747010.3390/technologies7040070technologies7040070A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron PartsSergey N. Grigoriev0Alexandr M. Dmitriev1Natalya V. Korobova2Sergey V. Fedorov3Department of High-efficiency Machining Technologies, Moscow State University of Technology STANKIN, Vadkovskiy per. 3A, 127055 Moscow, RussiaDepartment of Plastic Deformation System, Moscow State University of Technology STANKIN, Vadkovskiy per. 3A, 127055 Moscow, RussiaDepartment of Plastic Deformation System, Moscow State University of Technology STANKIN, Vadkovskiy per. 3A, 127055 Moscow, RussiaDepartment of High-efficiency Machining Technologies, Moscow State University of Technology STANKIN, Vadkovskiy per. 3A, 127055 Moscow, RussiaHighly performance methods for cold pressing (cold die forging) of preforms from iron powder with subsequent heat treatment and producing ready parts made of powder are described in the paper. These methods allow fabricating parts with smooth surfaces and improved mechanical characteristics—porosity, tensile strength. Application of the traditional design set-up with a single-axial loading is restricted to high stresses in the dies to deform the preforms that lead to cracks formation. New powder compaction schemes by applying active friction forces (shear-enhanced compaction) make it possible to unload dies and produce high-quality parts by cold pressing. The scheme allows moving the die in the direction of the material flow with a velocity that exceeds the material flow velocity.https://www.mdpi.com/2227-7080/7/4/70powder metallurgyiron powdercold pressingcold forgingcold extrusiongraphite coatingactive friction forcessintered preforms |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Sergey N. Grigoriev Alexandr M. Dmitriev Natalya V. Korobova Sergey V. Fedorov |
| spellingShingle |
Sergey N. Grigoriev Alexandr M. Dmitriev Natalya V. Korobova Sergey V. Fedorov A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts Technologies powder metallurgy iron powder cold pressing cold forging cold extrusion graphite coating active friction forces sintered preforms |
| author_facet |
Sergey N. Grigoriev Alexandr M. Dmitriev Natalya V. Korobova Sergey V. Fedorov |
| author_sort |
Sergey N. Grigoriev |
| title |
A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts |
| title_short |
A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts |
| title_full |
A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts |
| title_fullStr |
A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts |
| title_full_unstemmed |
A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts |
| title_sort |
cold-pressing method combining axial and shear flow of powder compaction to produce high-density iron parts |
| publisher |
MDPI AG |
| series |
Technologies |
| issn |
2227-7080 |
| publishDate |
2019-09-01 |
| description |
Highly performance methods for cold pressing (cold die forging) of preforms from iron powder with subsequent heat treatment and producing ready parts made of powder are described in the paper. These methods allow fabricating parts with smooth surfaces and improved mechanical characteristics—porosity, tensile strength. Application of the traditional design set-up with a single-axial loading is restricted to high stresses in the dies to deform the preforms that lead to cracks formation. New powder compaction schemes by applying active friction forces (shear-enhanced compaction) make it possible to unload dies and produce high-quality parts by cold pressing. The scheme allows moving the die in the direction of the material flow with a velocity that exceeds the material flow velocity. |
| topic |
powder metallurgy iron powder cold pressing cold forging cold extrusion graphite coating active friction forces sintered preforms |
| url |
https://www.mdpi.com/2227-7080/7/4/70 |
| work_keys_str_mv |
AT sergeyngrigoriev acoldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts AT alexandrmdmitriev acoldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts AT natalyavkorobova acoldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts AT sergeyvfedorov acoldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts AT sergeyngrigoriev coldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts AT alexandrmdmitriev coldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts AT natalyavkorobova coldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts AT sergeyvfedorov coldpressingmethodcombiningaxialandshearflowofpowdercompactiontoproducehighdensityironparts |
| _version_ |
1724898379591319552 |