FIELD: technological processes.
SUBSTANCE: invention relates to production of mandrel for use in press roll piercing mill for making seamless steel pipe/tube. Method involves blasting surface of mandrel and electric-arc spraying using wire with filler, consisting by one of versions of iron tubular shell and filler containing iron particles and particles of ZrO2 in amount of 2.5-30.0 wt%, wherein at surface of mandrel film containing iron oxide, iron and particles ZrO2 is formed, and by second version with electric-arc sputtering wire with filler consisting of iron tubular shell and filler containing iron particles and particles BN in amount from 5.0 to 20.0 wt% are used, with formation on mandrel surface of film containing iron oxide, iron and BN particles.
EFFECT: invention is aimed at production of film having improved insulation properties, and manufacturing of mandrel, capable to provide stable increased service life of mandrel during piercing rolling.
2 cl, 2 ex, 2 tbl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF MAKING MANDREL FOR ROLLING WITH PIERCING | 2013 |
|
RU2588937C2 |
| PIERCING AND ROLLING MANDREL, METHOD OF ITS RECONDITIONING AND PROCESS LINE TO THIS END | 2008 |
|
RU2446024C2 |
| METHOD OF MAKING MANDREL FOR PIERCING-ROLLING | 2013 |
|
RU2593884C9 |
| PIERCING MANDREL AND METHOD OF ITS MAKING | 2013 |
|
RU2605044C2 |
| SYSTEM OF EQUIPMENT FOR PIERCING AND ROLLING MANDREL PRODUCTION | 2013 |
|
RU2600771C2 |
| MANDREL USED IN PIERCING MILL | 2013 |
|
RU2592332C2 |
| DISK MILL MANDREL | 2013 |
|
RU2584620C1 |
| METHOD FOR RESTORING OUTER SURFACE OF PIERCING MILL MANDRELS AND STAMP FOR ITS IMPLEMENTATION | 2023 |
|
RU2806565C1 |
| HOT FORMING TOOL | 2015 |
|
RU2687321C2 |
| METHOD OF CHROME-CONTAINING STEEL HOT WORKING | 2004 |
|
RU2336133C1 |
