FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy, particularly to mandrel for use in piercing mill for rolling piercing of workpiece. Mandrel comprises a mandrel body, comprising a front end section and rear end section, built-up layer formed on at least part of surface of front end section of mandrel body, and sputtered film coating containing iron and iron oxides and covering at least surface, starting from back end of built-up layer to end of rear end section of mandrel body. Built-up layer has higher heat resistance than sputtered film coating.
EFFECT: mandrel is characterised by long service life.
7 cl, 6 dwg, 1 tbl, 20 ex
| Title | Year | Author | Number |
|---|---|---|---|
| DISK MILL MANDREL | 2013 |
|
RU2584620C1 |
| METHOD OF MAKING MANDREL FOR PIERCING-ROLLING | 2013 |
|
RU2593884C9 |
| PIERCING MANDREL AND METHOD OF ITS MAKING | 2013 |
|
RU2605044C2 |
| PIERCING APPARATUS, MANDREL USED FOR PIERCING APPARATUS AND METHOD OF PRODUCING SEAMLESS STEEL PIPE | 2012 |
|
RU2590459C2 |
| MANDREL FOR MAKING PIPES IN HOT STATE | 2013 |
|
RU2592334C1 |
| COOLED PIERCING MANDREL | 2019 |
|
RU2717422C1 |
| METHOD FOR RESTORING OUTER SURFACE OF PIERCING MILL MANDRELS AND STAMP FOR ITS IMPLEMENTATION | 2023 |
|
RU2806565C1 |
| BROACHING MILL GUARD | 0 |
|
SU910241A1 |
| TOOL FOR CONTROLLING INNER SURFACE, MANDREL, ROD, HOT ROLLING MILL, PRESS ROLL PIERCING MACHINE AND DRAWING MACHINE | 2013 |
|
RU2600770C2 |
| METHOD FOR HOT ROLLING OF SEAMLESS THIN-WALL TUBES | 1998 |
|
RU2138348C1 |
