FIELD: process engineering.
SUBSTANCE: invention relates to powder metallurgy, particularly, to production of bulky ultra dispersed and nano materials by electric pulse compaction. It can be used for production of high-strength articles. Pre-cleaning of powder is executed by heating it in vacuum by series of low-voltage DC pulses with duration not exceeding 120 s. Separate pulse duration does not exceed 3-10-3 s while pulse amplitude equal to 1-10 kA/cm2. Compaction is performed by subjecting the powder to pressure of 50-500 MPa and passing HV current pulse with density of 50-500 kA/cm2 and duration of 10-500 mcs.
EFFECT: higher strength and elasticity at initial powder grain sizes.
1 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF MANUFACTURING OF PIPE BLANKS OUT OF METAL POWDERS | 2013 |
|
RU2551750C1 |
| METHOD OF SINTERING ARTICLES FROM POWDER OF HARD ALLOYS OF WC-Co GROUP | 2014 |
|
RU2582851C1 |
| METHOD FOR SINTERING ARTICLES MADE OF POWDERS OF GROUP WC-Co SOLID ALLOYS | 2016 |
|
RU2636538C1 |
| MANUFACTURING METHOD OF ITEMS FROM ELECTROCONDUCTIVE POWDER MATERIALS | 2013 |
|
RU2541334C1 |
| METHOD FOR PRODUCING POROUS BIOCERAMIC WOLLASTONITE | 2020 |
|
RU2743834C1 |
| METHOD OF PRODUCING MATERIAL WITH DIFFERENT-LEVEL POROSITY BASED ON HEMATITE POWDERS | 2021 |
|
RU2765971C1 |
| METHOD FOR ELECTRIC PULSE APPLICATION OF HARDENING COATING FROM POWDER ON SURFACE OF STEEL PART AND DEVICE FOR ITS IMPLEMENTATION | 2018 |
|
RU2705744C1 |
| METHOD OF MAKING CERAMIC ARTICLES FROM POWDER | 2017 |
|
RU2704777C2 |
| METHOD FOR PRODUCING SPUTTERING COMPOSITE TARGET CONTAINING HEUSLER ALLOY PHASE OF COFeSi | 2016 |
|
RU2637845C1 |
| METHOD FOR PRODUCING SPRAYABLE COMPOSITE TARGET CONTAINING CoMnSi HEUSLER ALLOY PHASE | 2017 |
|
RU2678355C1 |
